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Monasca API

Date: November 5, 2014

Document Version: v2.0

Table of Contents generated with DocToc

Overview
Common Request Headers
- Common Http Request Headers
- Non-standard request headers
Common Responses
Paging
- Offset
- Limit
JSON Results
Versions
- List Versions
  - GET
  - Response
- Get Version
  - Get /{version_id}
  - Response
Metrics
- Create Metric
  - POST /v2.0/metrics
  - Response
    - Status Code
    - Response Body
- List metrics
Measurements
- List measurements
  - GET /v2.0/metrics/measurements
  - Response
Metric Names
- List names
  - GET /v2.0/metrics/names
  - Response
Statistics
- List statistics
  - GET /v2.0/metrics/statistics
  - Response
Notification Methods
Alarm Definitions
License

Overview

This document describes the Monasca API v2.0, which supports Monitoring as a Service (MONaaS). The Monasca API provides a RESTful JSON interface for interacting with and managing monitoring related resources.

The API consists of six main resources:

Versions - Provides information about the supported versions of the API.
Metrics - Provides for storage and retrieval of metrics.
Measurements - Operations for querying measurements of metrics.
Statistics - Operations for evaluating statistics of metrics.
Notification Methods - Represents a method, such as email, which can be associated with an alarm definition via an action. When an alarm is triggered notification methods associated with the alarm definition are triggered.
Alarm Definitions - Provides CRUD operations for alarm definitions.
Alarms - Provides CRUD operations for alarms, and querying the alarm state history.

Before using the API, you must first get a valid auth token from Keystone. All API operations require an auth token specified in the header of the http request.

Metric Name and Dimensions

A metric is uniquely identified by a name and set of dimensions.

Name

Defines the name of a metric. A name is of type string(255). The name may include any characters except the following: > < = { } ( ) , ' " \ ; &. A metric name surrounded by double quotes may include the following: > < = { } ( ) , ; &, but not " \. Note that JSON does allow control characters (such as \n), however these should not be used in metric names.

Dimensions

A dictionary of (key, value) pairs. The key and value are of type string(255). Dimension keys may not begin with '_' (underscore). The dimension key and value strings may include any characters except the following: > < = { } ( ) , ' " \ ; &. A dimension key or value surrounded by double quotes may include the following: > < = { } ( ) , ; &, but not " \. Note that JSON does allow control characters (such as \n), however these should not be used in dimension keys or values.

Text Representation

In this document, metrics will be represented in the form name{name=value,name=value} where name is the metric name and the name=value pairs in the curly braces are the dimensions. For example, cpu.idle_perc{service=monitoring,hostname=mini-mon} represents a metric with the name "cpu.idle_perc" and the dimensions "service=monitoring" and "hostname=mini-mon".

Measurement

A measurement is a value with a timestamp for a specific Metric. The value is represented by a double, e.g. 42.0 or 42.42.

Value Meta

Optionally, a measurement may also contain extra data about the value which is known as value meta. Value meta is a set of name/value pairs that add textual data to the value of the measurement. The value meta will be returned from the API when the measurement is read. Only measurements that were written with value meta will have the key value pairs when read from the API. The value meta is ignored when computing statistics such as average on measurements.

For an example of how value meta is used, imagine this metric: http_status{url: http://localhost:8080/healthcheck, hostname=devstack, service=object-storage}. The measurements for this metric have a value of either 1 or 0 depending if the status check succeeded. If the check fails, it would be helpful to have the actual http status code and error message if possible. So instead of just a value, the measurement will be something like: {Timestamp=now(), value=1, value_meta{http_rc=500, error=“Error accessing MySQL”}}

Up to 16 separate key/value pairs of value meta are allowed per measurement. The keys are required and are trimmed of leading and trailing whitespace and have a maximum length of 255 characters. The value is a string and has a maximum length of 2048 characters. The value can be an empty string. Whitespace is not trimmed from the values.

Alarm Definitions and Alarms

Alarm Definitions are policies that specify how Alarms should be created. By using Alarm Definitions, the user doesn't have to create individual alarms for each system or service. Instead, a small number of Alarm Definitions can be managed and Monasca will create Alarms for systems and services as they appear.

An Alarm Definition has an expression for evaluating one or more metrics to determine if there is a problem. Depending on the Alarm Definition expression and match_by value, Monasca will create one or more Alarms depending on the Metrics that are received. The match_by parameter specifies which dimension or dimensions should be used to determine if one or more alarms will be created.

An example is the best way to show this. Imagine two Alarm Definitions have been created:

Alarm Definition 1 has an expression of avg(cpu.idle_perc{service=monitoring}) < 20 and the match_by parameter is not set. Alarm Definition 2 has an expression of min(cpu.idle_perc{service=monitoring}) < 10 and the match_by parameter is set to hostname.

When the metric cpu.idle_perc{service=monitoring,hostname=mini-mon} is first received after the Metric Definitions have been created, an Alarm is created for both Alarm Definitions. The metric is added to both Alarms. The following set of Alarm Definitions and Alarm would exist:

Alarm Definition 1:

Alarm 1 - Metrics: cpu.idle_perc{service=monitoring,hostname=mini-mon}

Alarm Definition 2:

Alarm 1 - Metrics: cpu.idle_perc{service=monitoring,hostname=mini-mon}

Now, when the metric cpu.idle_perc{service=monitoring,hostname=devstack} is received, the two Alarm Definitions define different behaviors. Since the value for the hostname dimension is different from the value for the existing Alarm from Alarm Definition 2, and Alarm Definition 2 has specified a match_by parameter on hostname, a new Alarm will be created. Alarm Definition 1 does not have a value for match_by, so this metric is added to the existing Alarm. This gives us the following set of Alarm Definitions and Alarms:

Alarm Definition 1:

Alarm 1 - Metrics: cpu.idle_perc{service=monitoring,hostname=mini-mon} and cpu.idle_perc{service=monitoring,hostname=devstack}

Alarm Definition 2:

Alarm 1 - Metrics: cpu.idle_perc{service=monitoring,hostname=mini-mon}
Alarm 2 - Metrics: cpu.idle_perc{service=monitoring,hostname=devstack}

Alarm Definition 1 is evaluating the status of the monitoring service as a whole, while Alarm Definition 2 evaluates each system in the service.

Now if another system is configured into the monitoring service, then its cpu.idle_perc metric will be added to the Alarm for Alarm Definition 1 and a new Alarm will be created for Alarm Definition 2, all without any user intervention. The system will be monitored without requiring the user to explicitly add alarms for the new system as other monitoring systems require.

If an Alarm Definition expression has multiple subexpressions, for example, avg(cpu.idle_perc{service=monitoring}) < 10 or avg(cpu.user_perc{service=monitoring}) > 60 and a match_by value set, then the metrics for both subexpressions must have the same value for the dimension specified in match_by. For example, assume this Alarm Definition:

Expression avg(cpu.idle_perc{service=monitoring}) < 10 or avg(cpu.user_perc{service=monitoring}) > 60 and match_by is hostname

Now assume four metrics are received by Monasca:

cpu.idle_perc{service=monitoring,hostname=mini-mon}
cpu.idle_perc{service=monitoring,hostname=devstack}
cpu.user_perc{service=monitoring,hostname=mini-mon}
cpu.user_perc{service=monitoring,hostname=devstack}

This will cause two Alarms to be created, one for each unique value of hostname. One Alarm will have the metrics:

avg(cpu.idle_perc{service=monitoring,hostname=mini-mon}) and avg(cpu.user_perc{service=monitoring,hostname=mini-mon})

and another will have the metrics:

avg(cpu.idle_perc{service=monitoring,hostname=devstack}) and avg(cpu.user_perc{service=monitoring,hostname=devstack})

Note that the value of match_by, "hostname", is used to match the metrics between the subexpressions, hence the name 'match_by'.

An Alarm will only get created when metrics are seen that match all subexpressions in the Alarm Definition. If match_by is set, then each metric must have a value for at least one of the values in match_by. If match_by is not set, only one Alarm will be created for an Alarm Definition.

The value of the match_by parameter can also be a list, for example, hostname,device. In that case, Alarms will be created based and metrics added based on all values of match_by.

For example, assume the Alarm Definition with the expression max(disk.space_used_perc{service=monitoring}) > 90 and match_by set to hostname. This will create one alarm for each system that contains all of the metrics for each device. If instead, the match_by is set to hostname,device, then a separate alarm will be created for each device in each system.

To illustrate, assume these four metrics are received by Monasca:

disk.space_used_perc{device:/dev/sda1,hostname=mini-mon}
disk.space_used_perc{device:tmpfs,hostname=mini-mon}
disk.space_used_perc{device:/dev/sda1,hostname=devstack}
disk.space_used_perc{device:tmpfs,hostname=devstack}

Given the expression max(disk.space_used_perc{service=monitoring}) > 90 and match_by set to hostname, this will create two alarms:

Alarm 1 - Metrics: disk.space_used_perc{device:/dev/sda1,hostname=mini-mon}, disk.space_used_perc{device:tmpfs,hostname=mini-mon}
Alarm 2 - Metrics: disk.space_used_perc{device:/dev/sda1,hostname=devstack}, disk.space_used_perc{device:tmpfs,hostname=devstack}

If instead, match_by is set to hostname,device, then four alarms will be created:

Alarm 1 - Metrics: disk.space_used_perc{device:/dev/sda1,hostname=mini-mon}
Alarm 2 - Metrics: disk.space_used_perc{device:tmpfs,hostname=devstack}
Alarm 3 - Metrics: disk.space_used_perc{device:/dev/sda1,hostname=devstack}
Alarm 4 - Metrics: disk.space_used_perc{device:tmpfs,hostname=devstack}

The second value of match_by will create an Alarm for each device. For each device that fills up, a separate Alarm will be triggered. The first value of match_by will give you less Alarms to display in the dashboard but if an Alarm has already triggered for one device and another device fills up, the Alarm won't be triggered again.

If desired, an Alarm Definition can be created that exactly matches a set of metrics. The match_by should not be set. Only one Alarm will be created for that Alarm Definition.

Alarms have a state that is set by the Threshold Engine based on the incoming metrics. The states are: UNDETERMINED - No metrics for at least one of the subexpressions has been received in (period + 2) times periods (see below for definition of period and periods OK - Metrics have been received and the Alarm Definition Expression evaluates to false for the given metrics ALARM - Metrics have been received and the Alarm Definition Expression evaluates to true for the given metrics

The Alarms are evaluated and their state is set once per minute.

Alarm Definition Expressions

The alarm definition expression syntax allows the creation of simple or complex alarm definitions to handle a wide variety of needs. Alarm expressions are evaluated every 60 seconds.

An alarm expression is a boolean equation which if it evaluates to true with the incoming metrics, will then trigger a notification to be sent.

Syntax

At the highest level, you have an expression, which is made up of one or more subexpressions, joined by boolean operators. Parenthesis can be used around groups of subexpressions to indicated higher precedence. In a BNF style format where items enclosed in [] are optional, '*' means zero or more times, and '|' means or.

<expression> 
	::= <subexpression> [(and | or) <subexpression>]*

More formally, taking boolean operator precedence into account, where 'and' has higher precedence than 'or', results in the following.

<expression>
    ::= <and_expression> <or_logical_operator> <expression> 
    | <and_expression>

<and_expression>
	::= <sub_expression> <and_logical_operator> <and_expression> 
	| <sub_expression>

Each subexpression is made up of several parts with a couple of options:

<sub_expression> 
    ::= <function> '(' <metric> [',' period] ')' <relational_operator> threshold_value ['times' periods] 
	| '(' expression ')'

Period must be an integer multiple of 60. The default period is 60 seconds.

The logical_operators are: and (also &&), or (also ||).

<and_logical_operator> ::= 'and' | '&&'
<or_logical_operator> ::= 'or' | '||'

A metric can be a metric name only or a metric name followed by a list of dimensions. The dimensions further qualify the metric name.

<metric>
	::=  metric_name
	| metric_name '{' <dimension_list> '}'

Any number of dimensions can follow the metric name.

<dimension_list>
	::= <dimension>
	| <dimension> ',' <dimension_list>

A dimension is simply a key-value pair.

<dimension>
	::= dimension_name '=' dimension_value

The relational_operators are: lt (also <), gt (also >), lte (also <=), gte (also >=).

<relational_operator>
	::= 'lt' | '<' | 'gt' | '>' | 'lte' | '<=' | 'gte' | '>='

The list of available statistical functions include the following.

<function>
	::= 'min' | 'max' | 'sum' | 'count' | 'avg'

where 'avg' is the arithmetic average. Note, threshold values are always in the same units as the metric that they are being compared to.

Simple Example

In this example the metric uniquely identified with the name cpu.system_perc and dimension hostname=host.domain.com is compared to the threshold 95.

cpu.system_perc{hostname=host.domain.com} > 95

More Complex Example

In this example the average of the same metric as in the previous example is evaluated over a 120 second period for 3 times so that the expression will evaluate to true if the average is greater than 95 for a total of 360 seconds.

avg(cpu.system_perc{hostname=host.domain.com}, 120) > 95 times 3

Note that period is the number of seconds for the measurement to be done on. They can only be in a multiple of 60. Periods is how many times in a row that this expression must be true before triggering the alarm. Both period and periods are optional and default to 60 and 1 respectively.

Functions work on all metric measurements during the period time frame.

min (returns the minimum of all the values)
max (returns the maximum of all the values)
sum (returns the sum of all the values)
count (returns the number of metric observations)
avg (returns the average of all the values)

The metric is a complex identifier that says the name and optional dimensions.

Compound alarm example

In this example a compound alarm expression is evaluated involving two thresholds.

avg(cpu.system_perc{hostname=hostname.domain.com}) > 90 or avg(disk_read_ops{hostname=hostname.domain.com, device=vda}, 120) > 1000

Changing Alarm Definitions

Once an Alarm Definition has been created, the value for match_by and any metrics in the expression cannot be changed. This is because those fields control the metrics used to create Alarms and Alarms may already have been created. The function, operator, period, periods and any boolean operators can change, but not the metrics in subexpressions or the number of subexpressions. All other fields in an Alarm Definition can be changed.

The only option to change metrics or match_by is to delete the existing Alarm Definition and create a new one. Deleting an Alarm Definition will delete all Alarms associated with it.

Notification Methods

Notification methods are resources used to specify a notification name, type and address that notifications can be sent to. After a notification method has been created, it can be associated with actions in alarm definitions, such that when an alarm state transition occurs, one or more notifications can be sent.

Currently, notification method types of email, PagerDuty and webhooks are supported. In the case of email, the address is the email address. In the case of PagerDuty, the address is the PagerDuty Service API Key. In the case of a webhook, the address is the URL of the webhook.

Common Request Headers

This section documents the common request headers that are used in requests.

Common Http Request Headers

The standard Http request headers that are used in requests.

Content-Type - The Internet media type of the request body. Used with POST and PUT requests. Must be application/json.
Accept - Internet media types that are acceptable in the response. Must be application/json.
X-Requested-With (optional) - Which headers are requested to be allowed. Filled in by browser as part of the CORS protocol.
Origin (optional) - The origin of page that is requesting cross origin access. Filled in by browser as part of the CORS protocol.

Non-standard request headers

The non-standard request headers that are used in requests.

X-Auth-Token (string, required) - Keystone auth token

Common Responses

The Monasca API utilizes HTTP response codes to inform clients of the success or failure of each request. Clients should use the HTTP response code to trigger error handling if necessary. This section discusses various API error responses.

200 - A request succeeded.
201 - A resource has been successfully created.
204 - No content
400 - Bad request
401 - Unauthorized
404 - Not found
409 - Conflict
422 - Unprocessable entity

Paging

The Monasca API implements a paging mechanism to allow users to 'page' through result sets returned from the API. The paging functionality is limited to resources that return unbounded lists of results. This permits the user to consume as much data from the API as is needed without placing undo memory consumption burdens on the Monasca API Server. The paging mechanism is accomplished by allowing the user to specify an offset and a limit in the request URL as query parameters.

For example:

"http://192.168.10.4:8080/v2.0/metrics/measurements?offset=2015-03-03T05%3A21%3A55Z&limit=1000&name=cpu.system_perc&dimensions=hostname%3Adevstack&start_time=2014-07-18T03%3A00%3A00Z"

Results sets that would otherwise return more results if there had not been a limit will include a next link with the offset prepopulated. The user only need use the next link to get the next set of results.

If no limit is specified in the request URL, then a server-wide configurable limit is applied.

Offset

Offsets can be either integer offsets, string offsets, or timestamp offsets. The use of either integer, string, or timestamp is determined by the resource being queried.

For example, an integer offset would look like this:

offset=999

Integer offsets are zero based.

A string offset would look like this:

offset=c60ec47e-5038-4bf1-9f95-4046c6e9a759

A timestamp offset would look like this:

offset=2104-01-01T00:00:01Z

Different resources use different offset types because of the internal implementation of different resources depends on different types of mechanisms for indexing and identifying resources. The type and form of the offsets for each resource can be determined by referring to the examples in each resource section below.

The offset is determined by the ID of the last element in the result list. Users wishing to manually create a query URL can use the ID of the last element in the previously returned result set as the offset. The proceeding result set will return all elements with an ID greater than the offset up to the limit. The automatically generated offset in the next link does exactly this; it uses the ID in the last element.

The offset can take the form of an integer, string, or timestamp, but the user should treat the offset as an opaque reference. When using offsets in manually generated URLs, users enter them as strings that look like integers, timestamps, or strings. Future releases may change the type and form of the offsets for each resource.

Limit

The Monasca API has a server-wide default limit that is applied. Users may specifiy their own limit in the URL, but the server-wide limit may not be exceeded. The Monasca server-wide limit is configured in the Monasca API config file as maxQueryLimit. Users may specify a limit up to the maxQueryLimit.

limit=1000

JSON Results

All Monasca API results are in the form of JSON. For resources that return a list of elements, the JSON object returned will contain a 'links' array and an 'elements' array.

The 'links' array will contain a 'self' element that is the original URL of the request that was used to generate the result. The 'links' array may also contain a 'next' element if the number of elements in the result would exceed the query limit. The 'next' link can be used to query the Monasca API for the next set of results, thus allowing the user to page through lengthy data sets.

The 'elements' array will contain the items from the resource that match the query parameters. Each element will have an 'id' element. The 'id' element of the last item in the elements list is used as the offset in the 'next' link.

For example:

{
    "links": [
        {
            "rel": "self",
            "href": "http://192.168.10.4:8080/v2.0/metrics&limit=2"
        },
        {
            "rel": "next",
            "href": "http://192.168.10.4:8080/v2.0/metrics?offset=1&limit=2"
        }
    ],
    "elements": [
        {
            "id": 0,
            "name": "name1",
            "dimensions": {
                "key1": "value1"
            }
        },
        {
            "id": 1,
            "name": "name2",
            "dimensions": {
                "key1": "value1"
            }
        }
    ]
}

Versions

The versions resource supplies operations for accessing information about supported versions of the API.

List Versions

Lists the supported versions of the Monasca API.

GET /

Headers

X-Auth-Token (string, required) - Keystone auth token
Accept (string) - application/json

Path Parameters

None.

Query Parameters

None.

Request Body

None.

Request Examples

GET / HTTP/1.1
Host: 192.168.10.4:8080
X-Auth-Token: 2b8882ba2ec44295bf300aecb2caa4f7
Accept: application/json
Cache-Control: no-cache

Response

Status code

200 - OK

Response Body

Returns a JSON object with a 'links' array of links and an 'elements' array of supported versions.

Response Examples

{
    "links": [
        {
            "rel": "self",
            "href": "http://192.168.10.4:8080/"
        }
    ],
    "elements": [
        {
            "id": "v2.0",
            "links": [
                {
                    "rel": "self",
                    "href": "http://192.168.10.4:8080/v2.0"
                }
            ],
            "status": "CURRENT",
            "updated": "2014-07-18T03:25:02.423Z"
        }
    ]
}

Get Version

Gets detail about the specified version of the Monasca API.

Get /{version_id}

Headers

X-Auth-Token (string, required) - Keystone auth token
Accept (string) - application/json

Path Parameters

version_id (string, required) - Version ID of API

Query Parameters

None.

Request Body

None.

Request Examples

GET /v2.0/ HTTP/1.1
Host: 192.168.10.4:8080
Content-Type: application/json
X-Auth-Token: 2b8882ba2ec44295bf300aecb2caa4f7
Cache-Control: no-cache

Response

Status code

200 - OK

Response Body

Returns a JSON version object with details about the specified version.

Response Examples

{  
   "id":"v2.0",
   "links":[  
      {  
         "rel":"self",
         "href":"http://192.168.10.4:8080/v2.0/"
      }
   ],
   "status":"CURRENT",
   "updated":"2014-07-18T03:25:02.423Z"
}

Metrics

The metrics resource allows metrics to be created and queried. The X-Auth-Token is used to derive the tenant that submits metrics. Metrics are stored and scoped to the tenant that submits them, or if the tenant_id query parameter is specified and the tenant has the monitoring-delegate role, the metrics are stored using the specified tenant ID.

Create Metric

Create metrics.

POST /v2.0/metrics

Headers

X-Auth-Token (string, required) - Keystone auth token
Content-Type (string, required) - application/json

Path Parameters

None.

Query Parameters

tenant_id (string, optional, restricted) - Tenant ID to create metrics on behalf of. This parameter can be used to submit metrics from one tenant, to another. Normally, this parameter is used when the Agent is being run as an operational monitoring tenant, such as monitoring OpenStack infrastructure, and needs to submit metrics for an OpenStack resource, such as a VM, but those metrics need to be accessible to the tenant that owns the resource. Usage of this query parameter requires the monitoring-delegate role.

Request Body

Consists of a single metric object or an array of metric objects. A metric has the following properties:

name (string(255), required) - The name of the metric.
dimensions ({string(255): string(255)}, optional) - A dictionary consisting of (key, value) pairs used to uniquely identify a metric.
timestamp (string, required) - The timestamp in milliseconds from the Epoch.
value (float, required) - Value of the metric. Values with base-10 exponents greater than 126 or less than -130 are truncated.
value_meta ({string(255): string(2048)}, optional) - A dictionary consisting of (key, value) pairs used to add information about the value.

The name and dimensions are used to uniquely identify a metric.

Request Examples

Single metric

POST a single metric.

POST /v2.0/metrics HTTP/1.1
Host: 192.168.10.4:8080
Content-Type: application/json
X-Auth-Token: 27feed73a0ce4138934e30d619b415b0
Cache-Control: no-cache

{
   "name":"name1",
   "dimensions":{
      "key1":"value1",
      "key2":"value2"
   },
   "timestamp":1405630174123,
   "value":1.0
}

Single metric with value_meta

POST a single metric with value_meta.

POST /v2.0/metrics HTTP/1.1
Host: 192.168.10.4:8080
Content-Type: application/json
X-Auth-Token: 27feed73a0ce4138934e30d619b415b0
Cache-Control: no-cache

{
   "name":"name1",
   "dimensions":{
      "key1":"value1",
      "key2":"value2"
   },
   "timestamp":1405630174123,
   "value":1.0,
   "value_meta":{
      "key1":"value1",
      "key2":"value2"
   }
}

Array of metrics

POST an array of metrics.

POST /v2.0/metrics HTTP/1.1
Host: 192.168.10.4:8080
Content-Type: application/json
X-Auth-Token: 27feed73a0ce4138934e30d619b415b0
Cache-Control: no-cache

[  
   {  
      "name":"name1",
      "dimensions":{  
         "key1":"value1",
         "key2":"value2"
      },
      "timestamp":1405630174123,
      "value":1.0
   },
   {  
      "name":"name2",
      "dimensions":{  
         "key1":"value1",
         "key2":"value2"
      },
      "timestamp":1405630174123,
      "value":2.0,
      "value_meta":{
         "key1":"value1",
         "key2":"value2"
      }
   }
]

Response

Status Code

204 - No Content

Response Body

This request does not return a response body.

List metrics

Get metrics

GET /v2.0/metrics

Headers

X-Auth-Token (string, required) - Keystone auth token
Accept (string) - application/json

Path Parameters

None.

Query Parameters

name (string(255), optional) - A metric name to filter metrics by.
dimensions (string, optional) - A dictionary to filter metrics by specified as a comma separated array of (key, value) pairs as key1:value1,key2:value2, ...
offset (integer, optional)
limit (integer, optional)

Request Body

None.

Request Examples

GET /v2.0/metrics?name=metric1&dimensions=key1:value1 HTTP/1.1
Host: 192.168.10.4:8080
Content-Type: application/json
X-Auth-Token: 27feed73a0ce4138934e30d619b415b0
Cache-Control: no-cache

Response

Status Code

200 - OK

Response Body

Returns a JSON object with a 'links' array of links and an 'elements' array of metric definition objects with the following fields:

name (string)
dimensions ({string(255): string(255)})

Response Examples

{
    "links": [
        {
            "rel": "self",
            "href": "http://192.168.10.4:8080/v2.0/metrics"
        },
        {
            "rel": "next",
            "href": "http://192.168.10.4:8080/v2.0/metrics?offset=1"
        }
    ],
    "elements": [
        {
            "id": 0,
            "name": "name1",
            "dimensions": {
                "key1": "value1"
            }
        },
        {
            "id": 1,
            "name": "name2",
            "dimensions": {
                "key1": "value1"
            }
        }
    ]
}

Measurements

Operations for accessing measurements of metrics.

List measurements

Get measurements for metrics.

Metrics must be fully qualified with name and dimensions so that only measurements are returned for a single metric. If the metric name and dimensions given do not resolve to a single metric, an error will be displayed asking the user to futher qualify the metric with a name and additional dimensions.

If users do not wish to see measurements for a single metric, but would prefer to have measurements from multiple metrics combined, a 'merge_metrics' flag can be specified. when 'merge_metrics' is set to true (merge_metrics=true), all meaurements for all metrics that satisfy the query parameters will be merged into a single list of measurements.

GET /v2.0/metrics/measurements

Headers

X-Auth-Token (string, required) - Keystone auth token
Accept (string) - application/json

Path Parameters

None.

Query Parameters

name (string(255), optional) - A metric name to filter metrics by.
dimensions (string, optional) - A dictionary to filter metrics by specified as a comma separated array of (key, value) pairs as key1:value1,key2:value2, ...
start_time (string, required) - The start time in ISO 8601 combined date and time format in UTC.
end_time (string, optional) - The end time in ISO 8601 combined date and time format in UTC.
offset (timestamp, optional)
limit (integer, optional)
merge_metrics (boolean, optional) - allow multiple metrics to be combined into a single list of measurements.

Request Body

None.

Request Examples

GET /v2.0/metrics/measurements?name=cpu.system_perc&dimensions=hostname:devstack&start_time=2015-03-00T00:00:01Z HTTP/1.1
Host: 192.168.10.4:8080
Content-Type: application/json
X-Auth-Token: 2b8882ba2ec44295bf300aecb2caa4f7
Cache-Control: no-cache

Response

Status Code

200 - OK

Response Body

Returns a JSON object with a 'links' array of links and an 'elements' array of measurements objects for each unique metric with the following fields:

name (string(255)) - A name of a metric.
dimensions ({string(255): string(255)}) - The dimensions of a metric.
columns (array[string]) - An array of column names corresponding to the columns in measurements.
measurements (array[array[]]) - A two dimensional array of measurements for each timestamp. The timestamp is in ISO 8601 combined date and time format, with millisecond resolution.

Response Examples

{
    "links": [
        {
            "rel": "self",
            "href": "http://192.168.10.4:8080/v2.0/metrics/measurements?start_time=2015-03-00T00%3A00%3A00Z&name=cpu.system_perc&dimensions=hostname%3Adevstack"
        },
        {
            "rel": "next",
            "href": "http://192.168.10.4:8080/v2.0/metrics/measurements?offset=2015-03-03T05%3A24%3A55Z&name=cpu.system_perc&dimensions=hostname%3Adevstack&start_time=2015-03-00T00%3A00%3A00Z"
        }
    ],
    "elements": [
        {
            "id": "2015-03-03T05:24:55Z",
            "name": "http_status",
            "dimensions": {
                "url": "http://localhost:8774/v2.0",
                "hostname": "devstack",
                "service": "compute"
            },
            "columns": [
                "timestamp",
                "value",
                "value_meta"
            ],
            "measurements": [
                [
                    "2015-03-03T05:22:28.123Z",
                    0,
                    {}
                ],
                [
                    "2015-03-03T05:23:12.123Z",
                    0,
                    {}
                ],
                [
                    "2015-03-03T05:24:55.123Z",
                    1,
                    {
                        "rc": "404",
                        "error": "Not Found"
                    }
                ]
            ]
        }
    ]
}

Metric Names

Operations for accessing names of metrics.

List names

Get names for metrics.

GET /v2.0/metrics/names

Headers

X-Auth-Token (string, required) - Keystone auth token
Accept (string) - application/json

Path Parameters

None.

Query Parameters

dimensions (string, optional) - A dictionary to filter metrics by specified as a comma separated array of (key, value) pairs as key1:value1,key2:value2, ...
offset (integer, optional)
limit (integer, optional)

Request Body

None.

Request Examples

GET /v2.0/metrics/names HTTP/1.1
Host: 192.168.10.4:8080
Content-Type: application/json
X-Auth-Token: 2b8882ba2ec44295bf300aecb2caa4f7
Cache-Control: no-cache

Response

Status Code

200 - OK

Response Body

Returns a JSON object with a 'links' array of links and an 'elements' array of metric name objects for each unique metric name (not including dimensions) with the following fields:

name (string(255)) - A name of a metric.

Response Examples

{
    "elements": [
        {
            "name":"name1"
        },
        {
            "name":"name2"
        }
    ],
    "links": [
        {
            "rel": "self",
            "href": "http://192.168.10.4:8080/v2.0/metrics/names?offset=tenantId%3region%26name1%26dimensionKey1%3DdimensionValue1%26dimensionKey2%3DdimensionValue2"
        },
        {
            "rel": "next"
            "href": http://192.168.10.4:8080/v2.0/metrics/names?offset=tenantId%3region%26name3%26dimensionKey1%3DdimensionValue1%26dimensionKey2%3DdimensionValue2
        }
    ]
}

Statistics

Operations for calculating statistics of metrics.

Metrics must be fully qualified with name and dimensions so that only statistics are returned for a single metric. If the metric name and dimensions given do not resolve to a single metric, an error will be displayed asking the user to futher qualify the metric with a name and additional dimensions.

If users do not wish to see statistics for a single metric, but would prefer to have statistics from multiple metrics combined, a 'merge_metrics' flag can be specified. when 'merge_metrics' is set to true (merge_metrics=true), all statistics for all metrics that satisfy the query parameters will be merged into a single list of statistics.

List statistics

Get statistics for metrics.

GET /v2.0/metrics/statistics

Headers

X-Auth-Token (string, required) - Keystone auth token
Accept (string) - application/json

Path Parameters

None.

Query Parameters

name (string(255), required) - A metric name to filter metrics by.
dimensions (string, optional) - A dictionary to filter metrics by specified as a comma separated array of (key, value) pairs as key1:value1,key2:value2, ...
statistics (string, required) - A comma separate array of statistics to evaluate. Valid statistics are avg, min, max, sum and count.
start_time (string, required) - The start time in ISO 8601 combined date and time format in UTC.
end_time (string, optional) - The end time in ISO 8601 combined date and time format in UTC.
period (integer, optional) - The time period to aggregate measurements by. Default is 300 seconds.
offset (timestamp, optional)
limit (integer, optional)
merge_metrics (boolean, optional) - allow multiple metrics to be combined into a single list of statistics.

Request Body

None.

Request Examples

GET /v2.0/metrics/statistics?name=cpu.system_perc&dimensions=hostname:devstack&start_time=2014-07-18T03:00:00Z&statistics=avg,min,max,sum,count HTTP/1.1
Host: 192.168.10.4:8080
X-Auth-Token: 2b8882ba2ec44295bf300aecb2caa4f7
Content-Type: application/json
Cache-Control: no-cache

Response

Status Code

200 - OK

Response Body

Returns a JSON object with a 'links' array of links and an 'elements' array of statistic objects for each unique metric with the following fields:

name (string(255)) - A name of a metric.
dimensions ({string(255): string(255)}) - The dimensions of a metric.
columns (array[string]) - An array of column names corresponding to the columns in statistics.
statistics (array[array[]]) - A two dimensional array of statistics for each period.

Response Examples

{
    "links": [
        {
            "rel": "self",
            "href": "http://192.168.10.4:8080/v2.0/metrics/statistics?start_time=2014-07-18T03%3A00%3A00Z&name=cpu.system_perc&dimensions=hostname%3Adevstack&statistics=avg%2Cmin%2Cmax%2Csum%2Ccount"
        },
        {
            "rel": "next",
            "href": "http://192.168.10.4:8080/v2.0/metrics/statistics?offset=2014-07-18T03%3A22%3A00Z&name=cpu.system_perc&dimensions=hostname%3Adevstack&start_time=2014-07-18T03%3A00%3A00Z&statistics=avg%2Cmin%2Cmax%2Csum%2Ccount"
        }
    ],
    "elements": [
        {
            "id": "2014-07-18T03:22:00Z",
            "name": "cpu.system_perc",
            "dimensions": {
                "hostname": "devstack"
            },
            "columns": [
                "timestamp",
                "avg",
                "min",
                "max",
                "sum",
                "count"
            ],
            "statistics": [
                [
                    "2014-07-18T03:20:00Z",
                    2.765,
                    1.95,
                    4.93,
                    22.119999999999997,
                    8
                ],
                [
                    "2014-07-18T03:21:00Z",
                    2.412941176470588,
                    1.71,
                    4.09,
                    41.019999999999996,
                    17
                ],
                [
                    "2014-07-18T03:22:00Z",
                    2.1135294117647065,
                    1.62,
                    3.85,
                    35.93000000000001,
                    17
                ]
            ]
        }
    ]
}

Notification Methods

Operations for working with notification methods.

Create Notification Method

Creates a notification method through which notifications can be sent to when an alarm state transition occurs. Notification methods can be associated with zero or many alarms.

POST /v2.0/notification-methods

Headers

X-Auth-Token (string, required) - Keystone auth token
Content-Type (string, required) - application/json
Accept (string) - application/json

Path Parameters

None.

Query Parameters

None.

Request Body

name (string(250), required) - A descriptive name of the notification method.
type (string(100), required) - The type of notification method (EMAIL, WEBHOOK, or PAGERDUTY ).
address (string(100), required) - The email/url address to notify.

Request Examples

POST /v2.0/notification-methods HTTP/1.1
Host: 192.168.10.4:8080
Content-Type: application/json
X-Auth-Token: 2b8882ba2ec44295bf300aecb2caa4f7
Cache-Control: no-cache

{  
   "name":"Name of notification method",
   "type":"EMAIL",
   "address":"john.doe@hp.com"
}

Response

Status Code

200 - OK

Response Body

Returns a JSON notification method object with the following fields:

id (string) - ID of notification method
links ([link])
name (string) - Name of notification method
type (string) - Type of notification method
address (string) - Address of notification method

Response Examples

{  
   "id":"35cc6f1c-3a29-49fb-a6fc-d9d97d190508",
   "links":[  
      {  
         "rel":"self",
         "href":"http://192.168.10.4:8080/v2.0/notification-methods/35cc6f1c-3a29-49fb-a6fc-d9d97d190508"
      }
   ],
   "name":"Name of notification method",
   "type":"EMAIL",
   "address":"john.doe@hp.com"
}

List Notification Methods

List all notification methods.

GET /v2.0/notification-methods

Headers

X-Auth-Token (string, required) - Keystone auth token
Accept (string) - application/json

Path Parameters

None.

Query Parameters

offset (string, optional)
limit (integer, optional)

Request Body

None.

Request Examples

GET /v2.0/notification-methods HTTP/1.1
Host: 192.168.10.4:8080
Content-Type: application/json
X-Auth-Token: 2b8882ba2ec44295bf300aecb2caa4f7
Cache-Control: no-cache

Response

Status Code

200 - OK

Response Body

Returns a JSON object with a 'links' array of links and an 'elements' array of notification method objects with the following fields:

id (string) - ID of notification method
links ([link])
name (string) - Name of notification method
type (string) - Type of notification method
address (string) - Address of notification method

Response Examples

{
    "links": [
        {
            "rel": "self",
            "href": "http://192.168.10.4:8080/v2.0/notification-methods"
        },
        {
            "rel": "next",
            "href": "http://192.168.10.4:8080/v2.0/notification-methods?offset=c60ec47e-5038-4bf1-9f95-4046c6e9a759"
        }
    ],
    "elements": [
        {
            "id": "35cc6f1c-3a29-49fb-a6fc-d9d97d190508",
            "links": [
                {
                    "rel": "self",
                    "href": "http://192.168.10.4:8080/v2.0/notification-methods/35cc6f1c-3a29-49fb-a6fc-d9d97d190508"
                }
            ],
            "name": "Name of notification method",
            "type": "EMAIL",
            "address": "john.doe@hp.com"
        },
        {
            "id": "c60ec47e-5038-4bf1-9f95-4046c6e9a759",
            "links": [
                {
                    "rel": "self",
                    "href": "http://192.168.10.4:8080/v2.0/notification-methods/c60ec47e-5038-4bf1-9f95-4046c6e9a759"
                }
            ],
            "name": "Name of notification method",
            "type": "EMAIL",
            "address": "jane.doe@hp.com"
        }
    ]
}

Get Notification Method

Get the details of a specific notification method.

GET /v2.0/notification-methods/{notification_method_id}

Headers

X-Auth-Token (string, required) - Keystone auth token
Accept (string) - application/json

Path Parameters

notification_method_id (string, required) - ID of the notification method

Query Parameters

None.

Request Body

None.

Request Examples

GET http://192.168.10.4:8080/v2.0/notification-methods/35cc6f1c-3a29-49fb-a6fc-d9d97d190508

Response

Status Code

200 - OK

Response Body

Returns a JSON notification method object with the following fields:

id (string) - ID of notification method
links ([link])
name (string) - Name of notification method
type (string) - Type of notification method
address (string) - Address of notification method

Response Examples

{  
   "id":"35cc6f1c-3a29-49fb-a6fc-d9d97d190508",
   "links":[  
      {  
         "rel":"self",
         "href":"http://192.168.10.4:8080/v2.0/notification-methods/35cc6f1c-3a29-49fb-a6fc-d9d97d190508"
      }
   ],
   "name":"Name of notification method",
   "type":"EMAIL",
   "address":"john.doe@hp.com"
}

Update Notification Method

Update the specified notification method.

PUT /v2.0/notification-methods/{notification_method_id}

Headers

X-Auth-Token (string, required) - Keystone auth token
Content-Type (string, required) - application/json
Accept (string) - application/json

Path Parameters

notification_method_id (string, required) - ID of the notification method to update.

Query Parameters

None.

Request Body

name (string(250), required) - A descriptive name of the notifcation method.
type (string(100), required) - The type of notification method (EMAIL, WEBHOOK, or PAGERDUTY ).
address (string(100), required) - The email/url address to notify.

Request Examples

PUT /v2.0/notification-methods/35cc6f1c-3a29-49fb-a6fc-d9d97d190508 HTTP/1.1
Host: 192.168.10.4:8080
Content-Type: application/json
X-Auth-Token: 2b8882ba2ec44295bf300aecb2caa4f7
Cache-Control: no-cache

{  
   "name":"New name of notification method",
   "type":"EMAIL",
   "address":"jane.doe@hp.com"
}

Response

Status Code

200 - OK

Response Body

Returns a JSON notification method object with the following fields:

id (string) - ID of notification method
links ([link])
name (string) - Name of notification method
type (string) - Type of notification method
address (string) - Address of notification method

Response Examples

{  
   "id":"35cc6f1c-3a29-49fb-a6fc-d9d97d190508",
   "links":[  
      {  
         "rel":"self",
         "href":"http://192.168.10.4:8080/v2.0/notification-methods/35cc6f1c-3a29-49fb-a6fc-d9d97d190508"
      }
   ],
   "name":"New name of notification method",
   "type":"EMAIL",
   "address":"jane.doe@hp.com"
}

Delete Notification Method

Delete the specified notification method.

DELETE /v2.0/notification-methods/{notification_method_id}

Headers

X-Auth-Token (string, required) - Keystone auth token

Path Parameters

notification_method_id (string, required) - ID of the notification method to delete

Query Parameters

None.

Request Body

None.

Request Examples

DELETE /v2.0/notification-methods/35cc6f1c-3a29-49fb-a6fc-d9d97d190508 HTTP/1.1
Host: 192.168.10.4:8080
Content-Type: application/json
X-Auth-Token: 2b8882ba2ec44295bf300aecb2caa4f7
Cache-Control: no-cache

Response

Status Code

204 - No Content

Response Body

This request does not return a response body.

Alarm Definitions

Operations for working with alarm definitions.

Create Alarm Definition

Create an alarm definition.

POST /v2.0/alarm-definitions

Headers

X-Auth-Token (string, required) - Keystone auth token
Accept (string) - application/json

Path Parameters

None.

Query Parameters

None.

Request Body

Consists of an alarm definition. An alarm has the following properties:

name (string(255), required) - A unique name of the alarm. Note, the name must be unique.
description (string(255), optional) - A description of an alarm.
expression (string, required) - An alarm expression.
match_by ([string], optional) - The metric dimensions to use to create unique alarms
severity (string, optional) - Severity of an alarm. Must be either LOW, MEDIUM, HIGH or CRITICAL. Default is LOW.
alarm_actions ([string(50)], optional) - Array of notification method IDs that are invoked when the alarm transitions to the ALARM state.
ok_actions ([string(50)], optional) - Array of notification method IDs that are invoked when the alarm transitions to the OK state.
undetermined_actions ([string(50)], optional) - Array of notification method IDs that are invoked when the alarm transitions to the UNDETERMINED state.

Request Examples

POST /v2.0/alarm-definitions HTTP/1.1
Host: 192.168.10.4:8080
Content-Type: application/json
X-Auth-Token: 2b8882ba2ec44295bf300aecb2caa4f7
Cache-Control: no-cache

{  
   "name":"Average CPU percent greater than 10",
   "description":"The average CPU percent is greater than 10",
   "expression":"(avg(cpu,user_perc{hostname=devstack}) > 10)",
   "match_by":[
     "hostname"
   ],
   "severity":"LOW",
   "ok_actions":[  
     "c60ec47e-5038-4bf1-9f95-4046c6e9a759"
   ],
   "alarm_actions":[  
     "c60ec47e-5038-4bf1-9f95-4046c6e9a759"
   ],
   "undetermined_actions":[  
     "c60ec47e-5038-4bf1-9f95-4046c6e9a759"
   ]
}

Response

Status Code

201 - Created

Response Body

Returns a JSON object of alarm definition objects with the following fields:

id (string) - ID of alarm definition.
links ([link]) - Links to alarm definition.
name (string) - Name of alarm definition.
description (string) - Description of alarm definition.
expression (string) - The alarm definition expression.
expression_data (JSON object) - The alarm definition expression as a JSON object.
match_by ([string]) - The metric dimensions to match to the alarm dimensions
severity (string) - The severity of an alarm definition. Either LOW, MEDIUM, HIGH or CRITICAL.
actions_enabled (boolean) - If true actions for all alarms related to this definition are enabled.
alarm_actions ([string]) - Array of notification method IDs that are invoked when the alarms for this definition transition to the ALARM state.
ok_actions ([string]) - Array of notification method IDs that are invoked when the alarms for this definition transition to the OK state.
undetermined_actions ([string]) - Array of notification method IDs that are invoked when the alarms for this definition transition to the UNDETERMINED state.

Response Examples

{  
   "id":"b461d659-577b-4d63-9782-a99194d4a472",
   "links":[  
      {  
         "rel":"self",
         "href":"http://192.168.10.4:8080/v2.0/alarm-definitions/b461d659-577b-4d63-9782-a99194d4a472"
      }
   ],
   "name":"Average CPU percent greater than 10",
   "description":"The average CPU percent is greater than 10",
   "expression":"(avg(cpu.user_perc{hostname=devstack}) > 10)",
   "expression_data":{  
      "function":"AVG",
      "metric_name":"cpu.user_perc",
      "dimensions":{  
         "hostname":"devstack"
      },
      "operator":"GT",
      "threshold":10.0,
      "period":60,
      "periods":1
   },
   "match_by":[
     "hostname"
   ],
   "severity":"LOW",
   "alarm_actions":[  
     "c60ec47e-5038-4bf1-9f95-4046c6e9a759"
   ],
   "ok_actions":[  
     "c60ec47e-5038-4bf1-9f95-4046c6e9a759"
   ],
   "undetermined_actions":[  
     "c60ec47e-5038-4bf1-9f95-4046c6e9a759"
   ]
}

List Alarm Definitions

List alarm definitions.

GET /v2.0/alarm-definitions

Headers

X-Auth-Token (string, required) - Keystone auth token
Accept (string) - application/json

Path Parameters

None.

Query Parameters

name (string(255), optional) - Name of alarm to filter by.
dimensions (string, optional) - Dimensions of metrics to filter by specified as a comma separated array of (key, value) pairs as key1:value1,key1:value1, ...
offset (string, optional)
limit (integer, optional)

Request Body

None.

Request Examples

GET /v2.0/alarm-definitions?name=CPU percent greater than 10&dimensions=hostname:devstack&state=UNDETERMINED HTTP/1.1
Host: 192.168.10.4:8080
Content-Type: application/json
X-Auth-Token: 2b8882ba2ec44295bf300aecb2caa4f7
Cache-Control: no-cache

Response

Status Code

200 - OK

Response Body

Returns a JSON object with a 'links' array of links and an 'elements' array of alarm objects with the following fields:

id (string) - ID of alarm definition.
links ([link]) - Links to alarm definition.
name (string) - Name of alarm definition.
description (string) - Description of alarm definition.
expression (string) - The alarm definition expression.
expression_data (JSON object) - The alarm definition expression as a JSON object.
match_by ([string]) - The metric dimensions to use to create unique alarms
severity (string) - The severity of an alarm definition. Either LOW, MEDIUM, HIGH or CRITICAL.
actions_enabled (boolean) - If true actions for all alarms related to this definition are enabled.
alarm_actions ([string]) - Array of notification method IDs that are invoked when the alarms for this definition transition to the ALARM state.
ok_actions ([string]) - Array of notification method IDs that are invoked when the alarms for this definition transition to the OK state.
undetermined_actions ([string]) - Array of notification method IDs that are invoked when the alarms for this definition transition to the UNDETERMINED state.

Response Examples

{
    "links": [
        {
            "rel": "self",
            "href": "http://192.168.10.4:8080/v2.0/alarm-definitions?name=CPU%20percent%20greater%20than%2010&dimensions=hostname:devstack&state=UNDETERMINED"
        },
        {
            "rel": "next",
            "href": "http://localhost:8080/v2.0/alarm-definitions?offset=f9935bcc-9641-4cbf-8224-0993a947ea83&name=CPU%20percent%20greater%20than%2010&dimensions=hostname:devstack&state=UNDETERMINED"
        }
    ],
    "elements": [
        {
            "id": "f9935bcc-9641-4cbf-8224-0993a947ea83",
            "links": [
                {
                    "rel": "self",
                    "href": "http://192.168.10.4:8080/v2.0/alarm-definitions/f9935bcc-9641-4cbf-8224-0993a947ea83"
                }
            ],
            "name": "CPU percent greater than 10",
            "description": "Release the hounds",
            "expression": "(avg(cpu.user_perc{hostname=devstack}) > 10)",
            "expression_data": {
                "function": "AVG",
                "metric_name": "cpu.user_perc",
                "dimensions": {
                    "hostname": "devstack"
                },
                "operator": "GT",
                "threshold": 10,
                "period": 60,
                "periods": 1
            },
            "match_by": [
                "hostname"
            ],
            "severity": "CRITICAL",
            "actions_enabled": true,
            "alarm_actions": [
                "c60ec47e-5038-4bf1-9f95-4046c6e9a759"
            ],
            "ok_actions": [
                "c60ec47e-5038-4bf1-9f95-4046c6e9a759"
            ],
            "undetermined_actions": [
                "c60ec47e-5038-4bf1-9f95-4046c6e9a759"
            ]
        }
    ]
}

Get Alarm Definition

Get the specified alarm definition.

GET /v2.0/alarm-definitions/{alarm_definition_id}

Headers

X-Auth-Token (string, required) - Keystone auth token
Accept (string) - application/json

Path Parameters

alarm_definition_id (string, required) - Alarm Definition ID

Query Parameters

None.

Request Body

None.

Response

Status Code

200 - OK

Response Body

Returns a JSON alarm object with the following fields:

id (string) - ID of alarm definition.
links ([link]) - Links to alarm definition.
name (string) - Name of alarm definition.
description (string) - Description of alarm definition.
expression (string) - The alarm definition expression.
expression_data (JSON object) - The alarm definition expression as a JSON object.
match_by ([string]) - The metric dimensions to use to create unique alarms
severity (string) - The severity of an alarm definition. Either LOW, MEDIUM, HIGH or CRITICAL.
actions_enabled (boolean) - If true actions for all alarms related to this definition are enabled.
alarm_actions ([string]) - Array of notification method IDs that are invoked when the alarms for this definition transition to the ALARM state.
ok_actions ([string]) - Array of notification method IDs that are invoked when the alarms for this definition transition to the OK state.
undetermined_actions ([string]) - Array of notification method IDs that are invoked when the alarms for this definition transition to the UNDETERMINED state.

Response Examples

{
    "id": "f9935bcc-9641-4cbf-8224-0993a947ea83",
    "links": [
        {
            "rel": "self",
            "href": "http://192.168.10.4:8080/v2.0/alarm-definitions/f9935bcc-9641-4cbf-8224-0993a947ea83"
        }
    ],
    "name": "CPU percent greater than 10",
    "description": "Release the hounds",
    "expression": "(avg(cpu.user_perc{hostname=devstack}) > 10)",
    "expression_data": {
        "function": "AVG",
        "metric_name": "cpu.user_perc",
        "dimensions": {
            "hostname": "devstack"
        },
        "operator": "GT",
        "threshold": 10,
        "period": 60,
        "periods": 1
    },
    "match_by":[
      "hostname"
    ],
    "severity": "CRITICAL",
    "actions_enabled": true,
    "alarm_actions": [
        "c60ec47e-5038-4bf1-9f95-4046c6e9a759"
    ],
    "ok_actions": [
        "c60ec47e-5038-4bf1-9f95-4046c6e9a759"
    ],
    "undetermined_actions": [
        "c60ec47e-5038-4bf1-9f95-4046c6e9a759"
    ]
}

Update Alarm Definition

Update/Replace the specified alarm definition.

PUT /v2.0/alarm-definitions/{alarm_definition_id}

Headers

X-Auth-Token (string, required) - Keystone auth token
Content-Type (string, required) - application/json
Accept (string) - application/json

Path Parameters

alarm_definition_id (string, required)

Query Parameters

None.

Request Body

Consists of an alarm definition. An alarm has the following properties:

name (string(255), required) - A name of the alarm definition.
description (string(255), optional) - A description of an alarm definition.
expression (string, required) - An alarm expression.
match_by ([string], optional) - The metric dimensions to use to create unique alarms. If specified, this MUST be the same as the existing value for match_by
severity (string, optional) - Severity of an alarm definition. Must be either LOW, MEDIUM, HIGH or CRITICAL.
alarm_actions ([string(50)], optional)
ok_actions ([string(50)], optional)
undetermined_actions ([string(50)], optional)

If optional parameters are not specified they will be reset to their default state.

Only the parameters that are specified will be updated. See Changing Alarm Definitions for restrictions on changing expression and match_by.

Request Examples

PUT /v2.0/alarm-definitions/f9935bcc-9641-4cbf-8224-0993a947ea83 HTTP/1.1
Host: 192.168.10.4:8080
X-Auth-Token: 2b8882ba2ec44295bf300aecb2caa4f7
Content-Type: application/json
Cache-Control: no-cache

{  
   "name":"CPU percent greater than 15",
   "description":"Release the hounds",
   "expression":"(avg(cpu.user_perc{hostname=devstack}) > 15)",
   "match_by":[
     "hostname"
   ],
   "alarm_actions":[  
      "c60ec47e-5038-4bf1-9f95-4046c6e9a759"
   ],
   "ok_actions":[  
      "c60ec47e-5038-4bf1-9f95-4046c6e9a759"
   ],
   "undetermined_actions":[  
      "c60ec47e-5038-4bf1-9f95-4046c6e9a759"
   ]
}

Response

Status Code

200 - OK

Response Body

Returns a JSON alarm object with the following parameters:

id (string) - ID of alarm definition.
links ([link]) - Links to alarm definition.
name (string) - Name of alarm definition.
description (string) - Description of alarm definition.
expression (string) - The alarm definition expression.
expression_data (JSON object) - The alarm definition expression as a JSON object.
match_by ([string]) - The metric dimensions to use to create unique alarms
severity (string) - The severity of an alarm definition. Either LOW, MEDIUM, HIGH or CRITICAL.
actions_enabled (boolean) - If true actions for all alarms related to this definition are enabled.
alarm_actions ([string]) - Array of notification method IDs that are invoked when the alarms for this definition transition to the ALARM state.
ok_actions ([string]) - Array of notification method IDs that are invoked when the alarms for this definition transition to the OK state.
undetermined_actions ([string]) - Array of notification method IDs that are invoked when the alarms for this definition transition to the UNDETERMINED state.

Response Examples

{
    "id": "f9935bcc-9641-4cbf-8224-0993a947ea83",
    "links": [
        {
            "rel": "self",
            "href": "http://192.168.10.4:8080/v2.0/alarm-definitions/f9935bcc-9641-4cbf-8224-0993a947ea83"
        }
    ],
    "name": "CPU percent greater than 15",
    "description": "Release the hounds",
    "expression": "(avg(cpu.user_perc{hostname=devstack}) > 15)",
    "expression_data": {
        "function": "AVG",
        "metric_name": "cpu.user_perc",
        "dimensions": {
            "hostname": "devstack"
        },
        "operator": "GT",
        "threshold": 15,
        "period": 60,
        "periods": 1
    },
    "match_by":[
      "hostname"
    ]
    "severity": "CRITICAL",
    "alarm_actions": [
        "c60ec47e-5038-4bf1-9f95-4046c6e9a759"
    ],
    "ok_actions": [
        "c60ec47e-5038-4bf1-9f95-4046c6e9a759"
    ],
    "undetermined_actions": [
        "c60ec47e-5038-4bf1-9f95-4046c6e9a759"
    ]
}

Patch Alarm Definition

PATCH /v2.0/alarm-definitions/{alarm_definition_id}

Update select parameters of the specified alarm definition, and enable/disable its actions.

Headers

X-Auth-Token (string, required) - Keystone auth token
Content-Type (string, required) - application/json
Accept (string) - application/json

Path Parameters

alarm_definition_id (string, required) - Alarm Definition ID

Query Parameters

None.

Request Body

Consists of an alarm with the following properties:

name (string) - Name of alarm definition.
description (string) - Description of alarm definition.
expression (string) - The alarm definition expression.
match_by ([string], optional) - The metric dimensions to use to create unique alarms. If specified, this MUST be the same as the existing value for match_by
severity (string) - The severity of an alarm definition. Either LOW, MEDIUM, HIGH or CRITICAL.
actions_enabled (boolean) - If true actions for all alarms related to this definition are enabled.
alarm_actions ([string]) - Array of notification method IDs that are invoked when the alarms for this definition transition to the ALARM state.
ok_actions ([string]) - Array of notification method IDs that are invoked when the alarms for this definition transition to the OK state.
undetermined_actions ([string]) - Array of notification method IDs that are invoked when the alarms for this definition transition to the UNDETERMINED state.

Only the parameters that are specified will be updated. See Changing Alarm Definitions for restrictions on changing expression and match_by.

Request Examples

PATCH /v2.0/alarm-definitions/f9935bcc-9641-4cbf-8224-0993a947ea83 HTTP/1.1
Host: 192.168.10.4:8080
X-Auth-Token: 2b8882ba2ec44295bf300aecb2caa4f7
Content-Type: application/json
Cache-Control: no-cache

{  
   "name":"CPU percent greater than 15",
   "description":"Release the hounds",
   "expression":"(avg(cpu.user_perc{hostname=devstack}) > 15)",
   "match_by":[
     "hostname"
   ],
   "severity":"CRITICAL",
   "alarm_actions":[  
      "c60ec47e-5038-4bf1-9f95-4046c6e9a759"
   ],
   "ok_actions":[  
      "c60ec47e-5038-4bf1-9f95-4046c6e9a759"
   ],
   "undetermined_actions":[  
      "c60ec47e-5038-4bf1-9f95-4046c6e9a759"
   ]
}

Response

Status Code

200 - OK

Response Body

Returns a JSON alarm definition object with the following fields:

id (string) - ID of alarm definition.
links ([link]) - Links to alarm definition.
name (string) - Name of alarm definition.
description (string) - Description of alarm definition.
expression (string) - The alarm definition expression.
expression_data (JSON object) - The alarm definition expression as a JSON object.
match_by ([string]) - The metric dimensions to use to create unique alarms
severity (string) - The severity of an alarm definition. Either LOW, MEDIUM, HIGH or CRITICAL.
actions_enabled (boolean) - If true actions for all alarms related to this definition are enabled.
alarm_actions ([string]) - Array of notification method IDs that are invoked when the alarms for this definition transition to the ALARM state.
ok_actions ([string]) - Array of notification method IDs that are invoked when the alarms for this definition transition to the OK state.
undetermined_actions ([string]) - Array of notification method IDs that are invoked when the alarms for this definition transition to the UNDETERMINED state.

Response Examples

{
    "id": "f9935bcc-9641-4cbf-8224-0993a947ea83",
    "links": [
        {
            "rel": "self",
            "href": "http://192.168.10.4:8080/v2.0/alarm-definitions/f9935bcc-9641-4cbf-8224-0993a947ea83"
        }
    ],
    "name": "CPU percent greater than 15",
    "description": "Release the hounds",
    "expression": "(avg(cpu.user_perc{hostname=devstack}) > 15)",
    "expression_data": {
        "function": "AVG",
        "metric_name": "cpu.user_perc",
        "dimensions": {
            "hostname": "devstack"
        },
        "operator": "GT",
        "threshold": 15,
        "period": 60,
        "periods": 1
    },
    "match_by":[
      "hostname"
    ],
    "severity": "CRITICAL",
    "alarm_actions": [
        "c60ec47e-5038-4bf1-9f95-4046c6e9a759"
    ],
    "ok_actions": [
        "c60ec47e-5038-4bf1-9f95-4046c6e9a759"
    ],
    "undetermined_actions": [
        "c60ec47e-5038-4bf1-9f95-4046c6e9a759"
    ]
}

Delete Alarm Definition

Delete the specified alarm definition.

DELETE /v2.0/alarm-definitions/{alarm_definition_id}

Headers

X-Auth-Token (string, required) - Keystone auth token

Path Parameters

alarm_id (string, required) - Alarm Definition ID

Query Parameters

None.

Request Body

None.

Request Examples

DELETE /v2.0/alarm-definitions/b461d659-577b-4d63-9782-a99194d4a472 HTTP/1.1
Host: 192.168.10.4:8080
X-Auth-Token: 2b8882ba2ec44295bf300aecb2caa4f7
Cache-Control: no-cache

Response

Status Code

204 - No content

Response Body

None.

List Alarms

List alarms

GET /v2.0/alarms

Headers

X-Auth-Token (string, required) - Keystone auth token
Accept (string) - application/json

Path Parameters

None.

Query Parameters

alarm_definition_id (string, optional) - Alarm definition ID to filter by.
metric_name (string(255), optional) - Name of metric to filter by.
metric_dimensions ({string(255): string(255)}, optional) - Dimensions of metrics to filter by specified as a comma separated array of (key, value) pairs as key1:value1,key1:value1, ...
state (string, optional) - State of alarm to filter by, either OK, ALARM or UNDETERMINED.
state_updated_start_time (string, optional) - The start time in ISO 8601 combined date and time format in UTC.
offset (string, optional)
limit (integer, optional)

Request Body

None. "

Request Examples

GET /v2.0/alarms?metric_name=cpu.system_perc&metric_dimensions=hostname:devstack&state=UNDETERMINED HTTP/1.1
Host: 192.168.10.4:8080
Content-Type: application/json
X-Auth-Token: 2b8882ba2ec44295bf300aecb2caa4f7
Cache-Control: no-cache

Response

Status Code

200 - OK

Response Body

Returns a JSON object with a 'links' array of links and an 'elements' array of alarm objects with the following fields:

id (string) - ID of alarm.
links ([link]) - Links to alarm.
alarm_definition_id (string) - Name of alarm.
metrics ({string, string(255): string(255)}) - The metrics associated with the alarm.
state (string) - State of alarm, either OK, ALARM or UNDETERMINED.
state_updated_timestamp - Timestamp in ISO 8601 combined date and time format in UTC when the state was last updated
created_timestamp - Timestamp in ISO 8601 combined date and time format in UTC when the alarm was created

Response Examples

{
    "links": [
        {
            "rel": "self",
            "href": "http://192.168.10.4:8080/v2.0/alarms?name=cpu.system_perc&dimensions=hostname%3Adevstack&state=UNDETERMINED"
        },
        {
            "rel": "next",
            "href": "http://192.168.10.4:8080/v2.0/alarms?offset=f9935bcc-9641-4cbf-8224-0993a947ea83&name=cpu.system_perc&dimensions=hostname%3Adevstack&state=UNDETERMINED"
        }
    ],
    "elements": [
        {
            "id": "f9935bcc-9641-4cbf-8224-0993a947ea83",
            "links": [
                {
                    "rel": "self",
                    "href": "http://192.168.10.4:8080/v2.0/alarms/f9935bcc-9641-4cbf-8224-0993a947ea83"
                },
                {
                    "rel": "state-history",
                    "href": "http://192.168.10.4:8080/v2.0/alarms/f9935bcc-9641-4cbf-8224-0993a947ea83/state-history"
                }
            ],
            "alarm_definition": {
                "severity": "LOW",
                "id": "b7e5f472-7aa5-4254-a49a-463e749ae817",
                "links": [
                    {
                        "href": "http://192.168.10.4:8080/v2.0/alarm-definitions/b7e5f472-7aa5-4254-a49a-463e749ae817",
                        "rel": "self"
                    }
                ],
                "name": "high cpu and load"
            },
            "metrics": [
                {
                    "name": "cpu.system_perc",
                    "dimensions": {
                        "hostname": "devstack"
                    }
                }
            ],
            "state": "OK"
            "state_updated_timestamp": "2015-03-20T21:04:49.000Z",
            "created_timestamp": "2015-03-20T21:03:34.000Z"
        }
    ]
}

List Alarms State History

List alarm state history for alarms.

GET /v2.0/alarms/state-history

Headers

X-Auth-Token (string, required) - Keystone auth token
Accept (string) - application/json

Path Parameters

None.

Query Parameters

dimensions (string, optional) - Dimensions of metrics to filter by specified as a comma separated array of (key, value) pairs as key1:value1,key1:value1, ...
start_time (string, optional) - The start time in ISO 8601 combined date and time format in UTC.
end_time (string, optional) - The end time in ISO 8601 combined date and time format in UTC.
offset (integer, optional)
limit (integer, optional)

Request Body

None.

Response

Status Code

200 - OK

Response Body

Returns a JSON object with a 'links' array of links and an 'elements' array of alarm state transition objects with the following fields:

id - Alarm State Transition ID.
alarm_id (string) - Alarm ID.
metrics ({string, string, string(255): string(255)}) - The metrics associated with the alarm state transition.
old_state (string) - The old state of the alarm. Either OK, ALARM or UNDETERMINED.
new_state (string) - The new state of the alarm. Either OK, ALARM or UNDETERMINED.
reason (string) - The reason for the state transition.
reason_data (string) - The reason for the state transition as a JSON object.
timestamp (string) - The time in ISO 8601 combined date and time format in UTC when the state transition occurred.
sub_alarms ({{string, string, string(255): string(255), string, string, string, string}, string, [string]) - The sub-alarms stated of when the alarm state transition occurred.

Response Examples

{
    "links": [
        {
            "rel": "self",
            "href": "http://192.168.10.4:8080/v2.0/alarms/state-history?dimensions=hostname%3Adevstack"
        },
        {
            "rel": "next",
            "href": "http://192.168.10.4:8080/v2.0/alarms/state-history?offset=1424451007004&dimensions=hostname%3Adevstack"
        }
    ],
    "elements": [
        {
            "id": "1424451007002",
            "alarm_id": "bc7f388d-3522-47bd-b4ae-41567090ab72",
            "metrics": [
                {
                    "id": null,
                    "name": "cpu.system_perc",
                    "dimensions": {
                        "hostname": "devstack"
                    }
                }
            ],
            "old_state": "UNDETERMINED",
            "new_state": "OK",
            "reason": "The alarm threshold(s) have not been exceeded for the sub-alarms: avg(cpu.system_perc{hostname=devstack}) > 15.0 with the values: [1.5]",
            "reason_data": "{}",
            "timestamp": "2015-02-20T16:50:07.000Z",
            "sub_alarms": [
                {
                    "sub_alarm_expression": {
                        "function": "AVG",
                        "metric_name": "cpu.system_perc",
                        "dimensions": {
                            "hostname": "devstack"
                        },
                        "operator": "GT",
                        "threshold": 15,
                        "period": 60,
                        "periods": 1
                    },
                    "sub_alarm_state": "OK",
                    "current_values": [
                        1.5
                    ]
                }
            ]
        },
        {
            "id": "1424451007003",
            "alarm_id": "5ec51b06-193b-49f7-bcf7-b80d11010137",
            "metrics": [
                {
                    "id": null,
                    "name": "mysql.performance.slow_queries",
                    "dimensions": {
                        "component": "mysql",
                        "service": "mysql",
                        "hostname": "devstack"
                    }
                }
            ],
            "old_state": "ALARM",
            "new_state": "OK",
            "reason": "The alarm threshold(s) have not been exceeded for the sub-alarms: avg(mysql.performance.slow_queries) > 10.0 times 3 with the values: [29.23069852941176, 20.146139705882355, 7.536764705882352]",
            "reason_data": "{}",
            "timestamp": "2015-02-20T16:12:07.000Z",
            "sub_alarms": [
                {
                    "sub_alarm_expression": {
                        "function": "AVG",
                        "metric_name": "mysql.performance.slow_queries",
                        "dimensions": {},
                        "operator": "GT",
                        "threshold": 10,
                        "period": 60,
                        "periods": 3
                    },
                    "sub_alarm_state": "OK",
                    "current_values": [
                        29.23069852941176,
                        20.146139705882355,
                        7.536764705882352
                    ]
                }
            ]
        },
        {
            "id": "1424451007004",
            "alarm_id": "5ec51b06-193b-49f7-bcf7-b80d11010137",
            "metrics": [
                {
                    "id": null,
                    "name": "mysql.performance.slow_queries",
                    "dimensions": {
                        "component": "mysql",
                        "service": "mysql",
                        "hostname": "devstack"
                    }
                }
            ],
            "old_state": "OK",
            "new_state": "ALARM",
            "reason": "Thresholds were exceeded for the sub-alarms: avg(mysql.performance.slow_queries) > 10.0 times 3 with the values: [36.32720588235294, 29.23069852941176, 20.146139705882355]",
            "reason_data": "{}",
            "timestamp": "2015-02-20T16:11:07.000Z",
            "sub_alarms": [
                {
                    "sub_alarm_expression": {
                        "function": "AVG",
                        "metric_name": "mysql.performance.slow_queries",
                        "dimensions": {},
                        "operator": "GT",
                        "threshold": 10,
                        "period": 60,
                        "periods": 3
                    },
                    "sub_alarm_state": "ALARM",
                    "current_values": [
                        36.32720588235294,
                        29.23069852941176,
                        20.146139705882355
                    ]
                }
            ]
        }
    ]
}

Get Alarm

Get the specified alarm.

GET /v2.0/alarms/{alarm_id}

Headers

X-Auth-Token (string, required) - Keystone auth token
Accept (string) - application/json

Path Parameters

alarm_id (string, required) - Alarm ID

Query Parameters

None.

Request Body

None.

Response

Status Code

200 - OK

Response Body

Returns a JSON alarm object with the following fields:

id (string) - ID of alarm.
links ([link]) - Links to alarm.
alarm_definition_id (string) - Name of alarm.
description (string) - ID of the alarm definition.
metrics ({string, string(255): string(255)}) - The metrics associated with the alarm.
state (string) - State of alarm, either OK, ALARM or UNDETERMINED.

Response Examples

{  
   "id":"f9935bcc-9641-4cbf-8224-0993a947ea83",
   "links":[  
      {  
         "rel":"self",
         "href":"http://192.168.10.4:8080/v2.0/alarms/f9935bcc-9641-4cbf-8224-0993a947ea83"
      },
      {  
         "rel":"state-history",
         "href":"http://192.168.10.4:8080/v2.0/alarms/f9935bcc-9641-4cbf-8224-0993a947ea83/state-history"
      }
   ],
   "alarm_definition_id":"ad837fca-5564-4cbf-523-0117f7dac6ad",
   "metrics":[{
      "name":"cpu.system_perc",
      "dimensions":{  
         "hostname":"devstack"
      }
   }],
   "state":"OK"
   "state_updated_timestamp": "2015-03-20T21:04:49.000Z",
   "created_timestamp": "2015-03-20T21:03:34.000Z"
}

Update Alarm

Update/Replace the entire state of the specified alarm.

PUT /v2.0/alarms/{alarm_id}

Headers

X-Auth-Token (string, required) - Keystone auth token
Content-Type (string, required) - application/json
Accept (string) - application/json

Path Parameters

alarm_id (string, required)

Query Parameters

None.

Request Body

Consists of an alarm definition. An alarm has the following mutable properties:

state (string) - State of alarm, either OK, ALARM or UNDETERMINED.

Request Examples

PUT /v2.0/alarms/f9935bcc-9641-4cbf-8224-0993a947ea83 HTTP/1.1
Host: 192.168.10.4:8080
X-Auth-Token: 2b8882ba2ec44295bf300aecb2caa4f7
Content-Type: application/json
Cache-Control: no-cache

{  
  "state":"OK"
}

Response

Status Code

200 - OK

Response Body

Returns a JSON alarm object with the following parameters:

id (string) - ID of alarm.
links ([link]) - Links to alarm.
alarm_definition_id (string) - Name of alarm.
description (string) - ID of the alarm definition.
metrics ({string, string(255): string(255)}) - The metrics associated with the alarm.
state (string) - State of alarm, either OK, ALARM or UNDETERMINED.

Response Examples

{  
  "id":"f9935bcc-9641-4cbf-8224-0993a947ea83",
  "links":[  
     {  
        "rel":"self",
        "href":"http://192.168.10.4:8080/v2.0/alarms/f9935bcc-9641-4cbf-8224-0993a947ea83"
     },
     {  
        "rel":"state-history",
        "href":"http://192.168.10.4:8080/v2.0/alarms/f9935bcc-9641-4cbf-8224-0993a947ea83/state-history"
     }
  ],
  "alarm_definition_id":"ad837fca-5564-4cbf-523-0117f7dac6ad",
  "metrics":[{
     "name":"cpu.system_perc",
     "dimensions":{  
        "hostname":"devstack"
     }
  }],
  "state":"OK"
  "state_updated_timestamp": "2015-03-20T21:04:49.000Z",
  "created_timestamp": "2015-03-20T21:03:34.000Z"
}

Patch Alarm

PATCH /v2.0/alarms/{alarm_id}

Update select parameters of the specified alarm, set the alarm state and enable/disable it.

Headers

X-Auth-Token (string, required) - Keystone auth token
Content-Type (string, required) - application/json
Accept (string) - application/json

Path Parameters

alarm_id (string, required) - Alarm ID

Query Parameters

None.

Request Body

Consists of an alarm with the following mutable properties:

state (string) - State of alarm, either OK, ALARM or UNDETERMINED.

Request Examples

PATCH /v2.0/alarms/f9935bcc-9641-4cbf-8224-0993a947ea83 HTTP/1.1
Host: 192.168.10.4:8080
X-Auth-Token: 2b8882ba2ec44295bf300aecb2caa4f7
Content-Type: application/json
Cache-Control: no-cache

{  
  "state":"OK"
}

Response

Status Code

200 - OK

Response Body

Returns a JSON alarm object with the following fields:

id (string) - ID of alarm.
links ([link]) - Links to alarm.
alarm_definition_id (string) - Name of alarm.
description (string) - ID of the alarm definition.
metrics ({string, string(255): string(255)}) - The metrics associated with the alarm.
state (string) - State of alarm, either OK, ALARM or UNDETERMINED.

Response Examples

{
    "id": "f9935bcc-9641-4cbf-8224-0993a947ea83",
    "links": [
        {
            "rel": "self",
            "href": "http://192.168.10.4:8080/v2.0/alarms/f9935bcc-9641-4cbf-8224-0993a947ea83"
        },
        {
            "rel": "state-history",
            "href": "http://192.168.10.4:8080/v2.0/alarms/f9935bcc-9641-4cbf-8224-0993a947ea83/state-history"
        }
    ],
    "alarm_definition_id": "ad837fca-5564-4cbf-523-0117f7dac6ad",
    "metrics": [
        {
            "name": "cpu.system_perc",
            "dimensions": {
                "hostname": "devstack"
            }
        }
    ],
    "state": "OK"
    "state_updated_timestamp": "2015-03-20T21:04:49.000Z",
    "created_timestamp": "2015-03-20T21:03:34.000Z"
}

Delete Alarm

Delete the specified alarm.

DELETE /v2.0/alarms/{alarm_id}

Headers

X-Auth-Token (string, required) - Keystone auth token

Path Parameters

alarm_id (string, required) - Alarm ID

Query Parameters

None.

Request Body

None.

Request Examples

DELETE /v2.0/alarms/b461d659-577b-4d63-9782-a99194d4a472 HTTP/1.1
Host: 192.168.10.4:8080
X-Auth-Token: 2b8882ba2ec44295bf300aecb2caa4f7
Cache-Control: no-cache

Response

Status Code

204 - No content

Response Body

None.

List Alarm State History

List the alarm state history for the specified alarm.

GET /v2.0/alarms/{alarm_id}/state-history

Headers

X-Auth-Token (string, required) - Keystone auth token
Accept (string) - application/json

Path Parameters

alarm_id (string, required)

Query Parameters

offset (integer, optional)
limit (integer, optional)

Request Body

None.

Request Data

GET /v2.0/alarms/37d1ddf0-d7e3-4fc0-979b-25ac3779d9e0/state-history HTTP/1.1
Host: 192.168.10.4:8080
X-Auth-Token: 2b8882ba2ec44295bf300aecb2caa4f7
Cache-Control: no-cache

Response

Status Code

200 - OK

Response Body

Returns a JSON object with a 'links' array of links and an 'elements' array of alarm state transition objects with the following fields:

id - Alarm State Transition ID.
alarm_id (string) - Alarm ID.
metrics ({string, string, string(255): string(255)}) - The metrics associated with the alarm state transition.
old_state (string) - The old state of the alarm. Either OK, ALARM or UNDETERMINED.
new_state (string) - The new state of the alarm. Either OK, ALARM or UNDETERMINED.
reason (string) - The reason for the state transition.
reason_data (string) - The reason for the state transition as a JSON object.
timestamp (string) - The time in ISO 8601 combined date and time format in UTC when the state transition occurred.
sub_alarms ({{string, string, string(255): string(255), string, string, string, string}, string, [string]) - The sub-alarms stated of when the alarm state transition occurred.

Response Examples

{
    "links": [
        {
            "rel": "self",
            "href": "http://192.168.10.4:8080/v2.0/alarms/37d1ddf0-d7e3-4fc0-979b-25ac3779d9e0/state-history"
        },
        {
            "rel": "next",
            "href": "http://192.168.10.4:8080/v2.0/alarms/37d1ddf0-d7e3-4fc0-979b-25ac3779d9e0/state-history?offset=1424452147006"
        }
    ],
    "elements": [
        {
            "id": "1424452147003",
            "alarm_id": "37d1ddf0-d7e3-4fc0-979b-25ac3779d9e0",
            "metrics": [
                {
                    "id": null,
                    "name": "cpu.idle_perc",
                    "dimensions": {
                        "hostname": "devstack"
                    }
                }
            ],
            "old_state": "OK",
            "new_state": "ALARM",
            "reason": "Thresholds were exceeded for the sub-alarms: avg(cpu.idle_perc) < 10.0 times 3 with the values: [0.0, 0.0, 0.0]",
            "reason_data": "{}",
            "timestamp": "2015-02-20T17:09:07.000Z",
            "sub_alarms": [
                {
                    "sub_alarm_expression": {
                        "function": "AVG",
                        "metric_name": "cpu.idle_perc",
                        "dimensions": {},
                        "operator": "LT",
                        "threshold": 10,
                        "period": 60,
                        "periods": 3
                    },
                    "sub_alarm_state": "ALARM",
                    "current_values": [
                        0,
                        0,
                        0
                    ]
                }
            ]
        },
        {
            "id": "1424452147004",
            "alarm_id": "37d1ddf0-d7e3-4fc0-979b-25ac3779d9e0",
            "metrics": [
                {
                    "id": null,
                    "name": "cpu.idle_perc",
                    "dimensions": {
                        "hostname": "devstack"
                    }
                }
            ],
            "old_state": "ALARM",
            "new_state": "OK",
            "reason": "The alarm threshold(s) have not been exceeded for the sub-alarms: avg(cpu.idle_perc) < 10.0 times 3 with the values: [0.0, 0.0, 72.475]",
            "reason_data": "{}",
            "timestamp": "2015-02-20T17:02:07.000Z",
            "sub_alarms": [
                {
                    "sub_alarm_expression": {
                        "function": "AVG",
                        "metric_name": "cpu.idle_perc",
                        "dimensions": {},
                        "operator": "LT",
                        "threshold": 10,
                        "period": 60,
                        "periods": 3
                    },
                    "sub_alarm_state": "OK",
                    "current_values": [
                        0,
                        0,
                        72.475
                    ]
                }
            ]
        },
        {
            "id": "1424452147005",
            "alarm_id": "37d1ddf0-d7e3-4fc0-979b-25ac3779d9e0",
            "metrics": [
                {
                    "id": null,
                    "name": "cpu.idle_perc",
                    "dimensions": {
                        "hostname": "devstack"
                    }
                }
            ],
            "old_state": "OK",
            "new_state": "ALARM",
            "reason": "Thresholds were exceeded for the sub-alarms: avg(cpu.idle_perc) < 10.0 times 3 with the values: [0.0, 0.0, 0.0]",
            "reason_data": "{}",
            "timestamp": "2015-02-20T16:56:07.000Z",
            "sub_alarms": [
                {
                    "sub_alarm_expression": {
                        "function": "AVG",
                        "metric_name": "cpu.idle_perc",
                        "dimensions": {},
                        "operator": "LT",
                        "threshold": 10,
                        "period": 60,
                        "periods": 3
                    },
                    "sub_alarm_state": "ALARM",
                    "current_values": [
                        0,
                        0,
                        0
                    ]
                }
            ]
        },
        {
            "id": "1424452147006",
            "alarm_id": "37d1ddf0-d7e3-4fc0-979b-25ac3779d9e0",
            "metrics": [
                {
                    "id": null,
                    "name": "cpu.idle_perc",
                    "dimensions": {
                        "hostname": "devstack"
                    }
                }
            ],
            "old_state": "UNDETERMINED",
            "new_state": "OK",
            "reason": "The alarm threshold(s) have not been exceeded",
            "reason_data": "{}",
            "timestamp": "2015-02-20T15:02:30.000Z",
            "sub_alarms": []
        }
    ]
}

License

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

101 KiB Raw Blame History

Monasca API

Overview

Metric Name and Dimensions

Name

Dimensions

Text Representation

Measurement

Value Meta

Alarm Definitions and Alarms

Alarm Definition Expressions

Syntax

Simple Example

More Complex Example

Compound alarm example

Changing Alarm Definitions

Notification Methods

Common Request Headers

Common Http Request Headers

Non-standard request headers

Common Responses

Paging

Offset

Limit

JSON Results

Versions

List Versions

GET /

Headers

Path Parameters

Query Parameters

Request Body

Request Examples

Response

Status code

Response Body

Response Examples

Get Version

Get /{version_id}

Headers

Path Parameters

Query Parameters

Request Body

Request Examples

Response

Status code

Response Body

Response Examples

Metrics

Create Metric

POST /v2.0/metrics

Headers

Path Parameters

Query Parameters

Request Body

Request Examples

Single metric

Single metric with value_meta

Array of metrics

Response

Status Code

Response Body

List metrics

GET /v2.0/metrics

Headers

Path Parameters

Query Parameters

Request Body

Request Examples

Response

Status Code

Response Body

Response Examples

Measurements

List measurements

GET /v2.0/metrics/measurements

Headers

Path Parameters

Query Parameters

Request Body

101 KiB

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