openstack/deb-ceilometer
Code Issues Proposed changes
f49d43b595
deb-ceilometer/doc/source/measurements.rst
Adelina Tuvenie ef6f21ada7 Add disk latency metrics implementation in Hyper-V Inspector 
High latency between I/O requests can be a sign of issues. Collecting
disk metrics can help detect those issues. Windows / Hyper-V Server
2012 R2 can collect those metrics. This patch adds a disk latency
metrics implementation for the Hyper-V Inspector as well as disk latency
and per device latency pollsters.

DocImpact

Change-Id: I1621fc7d4226ae1f46cdfca878e8b52487ca4379
Implements: blueprint hyper-v-disk-latency-metrics
2015-02-02 17:18:01 -08:00

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..
Copyright 2012 New Dream Network (DreamHost)
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.
.. _measurements:
==============
Measurements
==============
Three type of meters are defined in ceilometer:
.. index::
double: meter; cumulative
double: meter; gauge
double: meter; delta
========== ==============================================================================
Type Definition
========== ==============================================================================
Cumulative Increasing over time (instance hours)
Gauge Discrete items (floating IPs, image uploads) and fluctuating values (disk I/O)
Delta Changing over time (bandwidth)
========== ==============================================================================
Units
=====
1. Whenever a volume is to be measured, SI approved units and their
approved symbols or abbreviations should be used. Information units
should be expressed in bits ('b') or bytes ('B').
2. For a given meter, the units should NEVER, EVER be changed.
3. When the measurement does not represent a volume, the unit
description should always described WHAT is measured (ie: apples,
disk, routers, floating IPs, etc.).
4. When creating a new meter, if another meter exists measuring
something similar, the same units and precision should be used.
5. Meters and samples should always document their units in Ceilometer (API
and Documentation) and new sampling code should not be merged without the
appropriate documentation.
============ ======== ============== =======================
Dimension Unit Abbreviations Note
============ ======== ============== =======================
None N/A Dimension-less variable
Volume byte B
Time seconds s
============ ======== ============== =======================
Here are the meter types by components that are currently implemented:
Compute (Nova)
==============
All meters are related to the guest machine, not the host.
=============================== ===== ========= ======== ======== ============= ==================================================================
Name Type* Unit Resource Origin** Support*** Note
=============================== ===== ========= ======== ======== ============= ==================================================================
instance g instance inst ID both 1, 2, 3, 4 Existence of instance
instance:<type> g instance inst ID both 1, 2, 3, 4 Existence of instance <type> (openstack types)
memory g MB inst ID n 1, 2 Volume of RAM allocated
memory.usage g MB inst ID p 1, 2, 3, 4 Volume of RAM used
cpu c ns inst ID p 1, 2 CPU time used
cpu_util g % inst ID p 1, 2, 3, 4 Average CPU utilisation
vcpus g vcpu inst ID n 1, 2 Number of VCPUs
disk.read.requests c request inst ID p 1, 2 Number of read requests
disk.read.requests.rate g request/s inst ID p 1, 2, 3 Average rate of reads
disk.write.requests c request inst ID p 1, 2 Number of write requests
disk.write.requests.rate g request/s inst ID p 1, 2, 3 Average rate of writes
disk.read.bytes c B inst ID p 1, 2 Volume of reads
disk.read.bytes.rate g B/s inst ID p 1, 2, 3, 4 Average rate of reads
disk.write.bytes c B inst ID p 1, 2 Volume of writes
disk.write.bytes.rate g B/s inst ID p 1, 2, 3, 4 Average volume of writes
disk.latency g ms inst ID p 2 Average disk latency
disk.device.read.requests c request disk ID p 1, 2 Number of read requests
disk.device.read.requests.rate g request/s disk ID p 1, 2, 3 Average rate of read requests
disk.device.write.requests c request disk ID p 1, 2 Number of write requests
disk.device.write.requests.rate g request/s disk ID p 1, 2, 3 Average rate of write requests
disk.device.read.bytes c B disk ID p 1, 2 Volume of reads
disk.device.read.bytes.rate g B/s disk ID p 1, 2, 3 Average rate of reads
disk.device.write.bytes c B disk ID p 1, 2 Volume of writes
disk.device.write.bytes.rate g B/s disk ID p 1, 2, 3 Average volume of writes
disk.device.latency g ms disk ID p 2 Average disk latency per device
disk.root.size g GB inst ID n 1, 2 Size of root disk
disk.ephemeral.size g GB inst ID n 1, 2 Size of ephemeral disk
network.incoming.bytes c B iface ID p 1, 2 Number of incoming bytes
network.incoming.bytes.rate g B/s iface ID p 1, 2, 3, 4 Average rate of incoming bytes
network.outgoing.bytes c B iface ID p 1, 2 Number of outgoing bytes
network.outgoing.bytes.rate g B/s iface ID p 1, 2, 3, 4 Average rate of outgoing bytes
network.incoming.packets c packet iface ID p 1, 2 Number of incoming packets
network.incoming.packets.rate g packet/s iface ID p 1, 2, 3, 4 Average rate of incoming packets
network.outgoing.packets c packet iface ID p 1, 2 Number of outgoing packets
network.outgoing.packets.rate g packet/s iface ID p 1, 2, 3, 4 Average rate of outgoing packets
=============================== ===== ========= ======== ======== ============= ==================================================================
::
Legend:
*
[g]: gauge
[c]: cumulative
**
[p]: pollster
[n]: notification
***
[1]: Libvirt support
[2]: HyperV support
[3]: Vsphere support
[4]: XenAPI support
.. note:: To enable the libvirt memory.usage supporting, you need libvirt
version 1.1.1+, qemu version 1.5+, and you need to prepare suitable balloon
driver in the image, particularly for Windows guests, most modern Linuxes
have it built in. The memory.usage meters can't be fetched without image
balloon driver.
.. note:: On libvirt/hyperV, the following meters are not generated directly
from the underlying hypervisor, but are generated by the 'rate_of_change'
transformer as defined in the default pipeline configuration.
- cpu_util
- disk.read.requests.rate
- disk.write.requests.rate
- disk.read.bytes.rate
- disk.write.bytes.rate
- disk.device.read.requests.rate
- disk.device.write.requests.rate
- disk.device.read.bytes.rate
- disk.device.write.bytes.rate
- network.incoming.bytes.rate
- network.outgoing.bytes.rate
- network.incoming.packets.rate
- network.outgoing.packets.rate
Contributors are welcome to extend other virtualization backends' meters
or complete the existing ones.
The meters below are related to the host machine.
.. note:: By default, Nova will not collect the following meters related to the host
compute node machine. Nova option 'compute_monitors = ComputeDriverCPUMonitor'
should be set in nova.conf to enable meters.
=============================== ========== ========= ======== ============ ========================
Name Type Unit Resource Origin Note
=============================== ========== ========= ======== ============ ========================
compute.node.cpu.frequency Gauge MHz host ID notification CPU frequency
compute.node.cpu.kernel.time Cumulative ns host ID notification CPU kernel time
compute.node.cpu.idle.time Cumulative ns host ID notification CPU idle time
compute.node.cpu.user.time Cumulative ns host ID notification CPU user mode time
compute.node.cpu.iowait.time Cumulative ns host ID notification CPU I/O wait time
compute.node.cpu.kernel.percent Gauge % host ID notification CPU kernel percentage
compute.node.cpu.idle.percent Gauge % host ID notification CPU idle percentage
compute.node.cpu.user.percent Gauge % host ID notification CPU user mode percentage
compute.node.cpu.iowait.percent Gauge % host ID notification CPU I/O wait percentage
compute.node.cpu.percent Gauge % host ID notification CPU utilization
=============================== ========== ========= ======== ============ ========================
Network (Neutron)
=================
======================== ========== ======== ======== ============ ======================================================
Name Type Unit Resource Origin Note
======================== ========== ======== ======== ============ ======================================================
network Gauge network netw ID notification Existence of network
network.create Delta network netw ID notification Creation requests for this network
network.update Delta network netw ID notification Update requests for this network
subnet Gauge subnet subnt ID notification Existence of subnet
subnet.create Delta subnet subnt ID notification Creation requests for this subnet
subnet.update Delta subnet subnt ID notification Update requests for this subnet
port Gauge port port ID notification Existence of port
port.create Delta port port ID notification Creation requests for this port
port.update Delta port port ID notification Update requests for this port
router Gauge router rtr ID notification Existence of router
router.create Delta router rtr ID notification Creation requests for this router
router.update Delta router rtr ID notification Update requests for this router
ip.floating Gauge ip ip ID both Existence of floating ip
ip.floating.create Delta ip ip ID notification Creation requests for this floating ip
ip.floating.update Delta ip ip ID notification Update requests for this floating ip
bandwidth Delta B label ID notification Bytes through this l3 metering label
======================== ========== ======== ======== ============ ======================================================
Image (Glance)
==============
======================== ========== ======= ======== ============ =======================================================
Name Type Unit Resource Origin Note
======================== ========== ======= ======== ============ =======================================================
image Gauge image image ID both Image polling -> it (still) exists
image.size Gauge B image ID both Uploaded image size
image.update Delta image image ID notification Number of update on the image
image.upload Delta image image ID notification Number of upload of the image
image.delete Delta image image ID notification Number of delete on the image
image.download Delta B image ID notification Image is downloaded
image.serve Delta B image ID notification Image is served out
======================== ========== ======= ======== ============ =======================================================
Volume (Cinder)
===============
============================ ========== ======== ======== ============ =======================================================
Name Type Unit Resource Origin Note
============================ ========== ======== ======== ============ =======================================================
volume Gauge volume vol ID notification Existence of volume
volume.size Gauge GB vol ID notification Size of volume
volume.create.(start|end) Delta volume vol ID notification Creation of volume
volume.delete.(start|end) Delta volume vol ID notification Deletion of volume
volume.update.(start|end) Delta volume vol ID notification Update volume(name or description)
volume.resize.(start|end) Delta volume vol ID notification Update volume size
volume.attach.(start|end) Delta volume vol ID notification Attaching volume to instance
volume.detach.(start|end) Delta volume vol ID notification Detaching volume from instance
snapshot Gauge snapshot snap ID notification Existence of snapshot
snapshot.size Gauge GB snap ID notification Size of snapshot's volume
snapshot.create.(start|end) Delta snapshot snap ID notification Creation of snapshot
snapshot.delete.(start|end) Delta snapshot snap ID notification Deletion of snapshot
snapshot.update.(start|end) Delta snapshot snap ID notification Update snapshot(name or description)
============================ ========== ======== ======== ============ =======================================================
Make sure Cinder is properly configured first: see :ref:`installing_manually`.
Identity (Keystone)
===================
================================ ========== =============== ========== ============ ===========================================
Name Type Unit Resource Origin Note
================================ ========== =============== ========== ============ ===========================================
identity.authenticate.success Delta user user ID notification User successfully authenticates
identity.authenticate.pending Delta user user ID notification User pending authentication
identity.authenticate.failure Delta user user ID notification User failed authentication
identity.role_assignment.created Delta role_assignment role ID notification A role is added to an actor on a target
identity.role_assignment.deleted Delta role_assignment role ID notification A role is removed from an actor on a target
identity.user.created Delta user user ID notification A user is created
identity.user.deleted Delta user user ID notification A user is deleted
identity.user.updated Delta user user ID notification A user is updated
identity.group.created Delta group group ID notification A group is created
identity.group.deleted Delta group group ID notification A group is deleted
identity.group.updated Delta group group ID notification A group is updated
identity.role.created Delta role role ID notification A role is created
identity.role.deleted Delta role role ID notification A role is deleted
identity.role.updated Delta role role ID notification A role is updated
identity.project.created Delta project project ID notification A project is created
identity.project.deleted Delta project project ID notification A project is deleted
identity.project.updated Delta project project ID notification A project is updated
identity.trust.created Delta trust trust ID notification A trust is created
identity.trust.deleted Delta trust trust ID notification A trust is deleted
================================ ========== =============== ========== ============ ===========================================
Object Storage (Swift)
======================
=============================== ========== ========== =========== ============ ==========================================
Name Type Unit Resource Origin Note
=============================== ========== ========== =========== ============ ==========================================
storage.objects Gauge object store ID pollster Number of objects
storage.objects.size Gauge B store ID pollster Total size of stored objects
storage.objects.containers Gauge container store ID pollster Number of containers
storage.objects.incoming.bytes Delta B store ID notification Number of incoming bytes
storage.objects.outgoing.bytes Delta B store ID notification Number of outgoing bytes
storage.api.request Delta request store ID notification Number of API requests against swift
storage.containers.objects Gauge object str ID/cont pollster Number of objects in container
storage.containers.objects.size Gauge B str ID/cont pollster Total size of stored objects in container
=============================== ========== ========== =========== ============ ==========================================
In order to use storage.objects.incoming.bytes and storage.outgoing.bytes, one must configure
Swift as described in :ref:`installing_manually`. Note that they may not be
updated right after an upload/download, since Swift takes some time to update
the container properties.
Orchestration (Heat)
====================
=============================== ========== ========== =========== ============ ==========================================
Name Type Unit Resource Origin Note
=============================== ========== ========== =========== ============ ==========================================
stack.create Delta stack stack ID notification Creation requests for a stack successful
stack.update Delta stack stack ID notification Updating requests for a stack successful
stack.delete Delta stack stack ID notification Deletion requests for a stack successful
stack.resume Delta stack stack ID notification Resuming requests for a stack successful
stack.suspend Delta stack stack ID notification Suspending requests for a stack successful
=============================== ========== ========== =========== ============ ==========================================
To enable Heat notifications configure Heat as described in :ref:`installing_manually`.
Data Processing (Sahara)
========================
=============================== ========== ========== =========== ============ =================================================
Name Type Unit Resource Origin Note
=============================== ========== ========== =========== ============ =================================================
cluster.create Delta cluster cluster ID notification Creation requests for a cluster successful
cluster.update Delta cluster cluster ID notification Updating status requests for a cluster successful
cluster.delete Delta cluster cluster ID notification Deletion requests for a cluster successful
=============================== ========== ========== =========== ============ =================================================
To enable Sahara notifications configure Sahara as described in :ref:`installing_manually`.
Key Value Store (MagnetoDB)
=============================
=============================== ========== ========== =========== ============ =================================================
Name Type Unit Resource Origin Note
=============================== ========== ========== =========== ============ =================================================
magnetodb.table.create Gauge table table ID notification Creation requests for a table successful
magnetodb.table.delete Gauge table table ID notification Deletion requests for a table successful
magnetodb.table.index.count Gauge index table ID notification Number of indices created in a table
=============================== ========== ========== =========== ============ =================================================
To enable MagnetoDB notifications configure MagnetoDB as described in :ref:`installing_manually`.
Energy (Kwapi)
==============
========================== ========== ========== ======== ========= ==============================================
Name Type Unit Resource Origin Note
========================== ========== ========== ======== ========= ==============================================
energy Cumulative kWh probe ID pollster Amount of energy
power Gauge W probe ID pollster Power consumption
========================== ========== ========== ======== ========= ==============================================
Network (From SDN Controller)
=============================
These meters based on OpenFlow Switch metrics.
In order to enable these meters, each driver needs to be configured.
================================= ========== ====== ========= ======== ==============================
Meter Type Unit Resource Origin Note
================================= ========== ====== ========= ======== ==============================
switch Gauge switch switch ID pollster Existence of switch
switch.port Gauge port switch ID pollster Existence of port
switch.port.receive.packets Cumulative packet switch ID pollster Received Packets
switch.port.transmit.packets Cumulative packet switch ID pollster Transmitted Packets
switch.port.receive.bytes Cumulative B switch ID pollster Received Bytes
switch.port.transmit.bytes Cumulative B switch ID pollster Transmitted Bytes
switch.port.receive.drops Cumulative packet switch ID pollster Receive Drops
switch.port.transmit.drops Cumulative packet switch ID pollster Transmit Drops
switch.port.receive.errors Cumulative packet switch ID pollster Receive Errors
switch.port.transmit.errors Cumulative packet switch ID pollster Transmit Errors
switch.port.receive.frame_error Cumulative packet switch ID pollster Receive Frame Alignment Errors
switch.port.receive.overrun_error Cumulative packet switch ID pollster Receive Overrun Errors
switch.port.receive.crc_error Cumulative packet switch ID pollster Receive CRC Errors
switch.port.collision.count Cumulative count switch ID pollster Collisions
switch.table Gauge table switch ID pollster Duration of Table
switch.table.active.entries Gauge entry switch ID pollster Active Entries
switch.table.lookup.packets Gauge packet switch ID pollster Packet Lookups
switch.table.matched.packets Gauge packet switch ID pollster Packet Matches
switch.flow Gauge flow switch ID pollster Duration of Flow
switch.flow.duration.seconds Gauge s switch ID pollster Duration(seconds)
switch.flow.duration.nanoseconds Gauge ns switch ID pollster Duration(nanoseconds)
switch.flow.packets Cumulative packet switch ID pollster Received Packets
switch.flow.bytes Cumulative B switch ID pollster Received Bytes
================================= ========== ====== ========= ======== ==============================
LoadBalancer as a Service (LBaaS)
=================================
========================================= ========== ========== ========== ============ ==============================
Meter Type Unit Resource Origin Note
========================================= ========== ========== ========== ============ ==============================
network.services.lb.pool Gauge pool pool ID both Existence of a LB Pool
network.services.lb.pool.create Delta pool pool ID notification Creation of a LB Pool
network.services.lb.pool.update Delta pool pool ID notification Update of a LB Pool
network.services.lb.vip Gauge vip vip ID both Existence of a LB Vip
network.services.lb.vip.create Delta vip vip ID notification Creation of a LB Vip
network.services.lb.vip.update Delta vip vip ID notification Update of a LB Vip
network.services.lb.member Gauge member member ID both Existence of a LB Member
network.services.lb.member.create Delta member member ID notification Creation of a LB Member
network.services.lb.member.update Delta member member ID notification Update of a LB Member
network.services.lb.health_monitor Gauge monitor monitor ID both Existence of a LB Health Probe
network.services.lb.health_monitor.create Delta monitor monitor ID notification Creation of a LB Health Probe
network.services.lb.health_monitor.update Delta monitor monitor ID notification Update of a LB Health Probe
network.services.lb.total.connections Cumulative connection pool ID pollster Total connections on a LB
network.services.lb.active.connections Gauge connection pool ID pollster Active connections on a LB
network.services.lb.incoming.bytes Cumulative B pool ID pollster Number of incoming Bytes
network.services.lb.outgoing.bytes Cumulative B pool ID pollster Number of outgoing Bytes
========================================= ========== ========== ========== ============ ==============================
VPN as a Service (VPNaaS)
=========================
======================================= ===== =========== ============== ============ ===============================
Meter Type Unit Resource Origin Note
======================================= ===== =========== ============== ============ ===============================
network.services.vpn Gauge vpn vpn ID both Existence of a VPN service
network.services.vpn.create Delta vpn vpn ID notification Creation of a VPN service
network.services.vpn.update Delta vpn vpn ID notification Update of a VPN service
network.services.vpn.connections Gauge connection connection ID both Existence of a IPSec Connection
network.services.vpn.connections.create Delta connection connection ID notification Creation of a IPSec Connection
network.services.vpn.connections.update Delta connection connection ID notification Update of a IPSec Connection
network.services.vpn.ipsecpolicy Gauge ipsecpolicy ipsecpolicy ID notification Existence of a IPSec Policy
network.services.vpn.ipsecpolicy.create Delta ipsecpolicy ipsecpolicy ID notification Creation of a IPSec Policy
network.services.vpn.ipsecpolicy.update Delta ipsecpolicy ipsecpolicy ID notification Update of a IPSec Policy
network.services.vpn.ikepolicy Gauge ikepolicy ikepolicy ID notification Existence of a Ike Policy
network.services.vpn.ikepolicy.create Delta ikepolicy ikepolicy ID notification Creation of a Ike Policy
network.services.vpn.ikepolicy.update Delta ikepolicy ikepolicy ID notification Update of a Ike Policy
======================================= ===== =========== ============== ============ ===============================
Firewall as a Service (FWaaS)
=============================
======================================= ===== ======== =========== ============ ===============================
Meter Type Unit Resource Origin Note
======================================= ===== ======== =========== ============ ===============================
network.services.firewall Gauge firewall firewall ID both Existence of a Firewall service
network.services.firewall.create Delta firewall firewall ID notification Creation of a Firewall service
network.services.firewall.update Delta firewall firewall ID notification Update of a Firewall service
network.services.firewall.policy Gauge policy policy ID both Existence of a Firewall Policy
network.services.firewall.policy.create Delta policy policy ID notification Creation of a Firewall Policy
network.services.firewall.policy.update Delta policy policy ID notification Update of a Firewall Policy
network.services.firewall.rule Gauge rule rule ID notification Existence of a Firewall Rule
network.services.firewall.rule.create Delta rule rule ID notification Creation of a Firewall Rule
network.services.firewall.rule.update Delta rule rule ID notification Update of a Firewall Rule
======================================= ===== ======== =========== ============ ===============================
Ironic Hardware IPMI Sensor Data
================================
IPMI sensor data is not available by default in Ironic. To enable these meters
see the `Ironic Installation Guide`_.
.. _Ironic Installation Guide: http://docs.openstack.org/developer/ironic/deploy/install-guide.html
============================= ========== ====== ============== ============ ==========================
Meter Type Unit Resource Origin Note
============================= ========== ====== ============== ============ ==========================
hardware.ipmi.fan Gauge RPM fan sensor notification Fan RPM
hardware.ipmi.temperature Gauge C temp sensor notification Sensor Temperature Reading
hardware.ipmi.current Gauge W current sensor notification Sensor Current Reading
hardware.ipmi.voltage Gauge V voltage sensor notification Sensor Voltage Reading
============================= ========== ====== ============== ============ ==========================
There is another way to retrieve IPMI data, by deploying the Ceilometer IPMI
agent on each IPMI-capable node in order to poll local sensor data. To avoid
duplication of metering data and unnecessary load on the IPMI interface, the
IPMI agent should not be deployed if the node is managed by Ironic and the
'conductor.send_sensor_data' option is set to true in the Ironic configuration.
IPMI agent also retrieve following Node Manager meter besides original IPMI
sensor data:
=============================== ========== ====== ============== ============ ==========================
Meter Type Unit Resource Origin Note
=============================== ========== ====== ============== ============ ==========================
hardware.ipmi.node.power Gauge W host ID pollster System Current Power
hardware.ipmi.node.temperature Gauge C host ID pollster System Current Temperature
=============================== ========== ====== ============== ============ ==========================
Generic Host
================================
These meters are generic host metrics getting from snmp. To enable these, snmpd
agent should be running on the host from which the metrics are gathered.
======================================== ===== ========= ======== ======== ====================================================
Meter Type* Unit Resource Origin Note
======================================== ===== ========= ======== ======== ====================================================
hardware.cpu.load.1min g process host ID pollster CPU load in the past 1 minute
hardware.cpu.load.5min g process host ID pollster CPU load in the past 5 minutes
hardware.cpu.load.15min g process host ID pollster CPU load in the past 15 minutes
hardware.disk.size.total g B disk ID pollster Total disk size
hardware.disk.size.used g B disk ID pollster Used disk size
hardware.memory.total g B host ID pollster Total physical memory size
hardware.memory.used g B host ID pollster Used physical memory size
hardware.memory.swap.total g B host ID pollster Total swap space size
hardware.memory.swap.avail g B host ID pollster Available swap space size
hardware.network.incoming.bytes c B iface ID pollster Bytes received by network interface
hardware.network.outgoing.bytes c B iface ID pollster Bytes sent by network interface
hardware.network.outgoing.errors c packet iface ID pollster Sending error of network interface
hardware.network.ip.incoming.datagrams c datagrams host ID pollster Number of received datagrams
hardware.network.ip.outgoing.datagrams c datagrams host ID pollster Number of sent datagrams
hardware.system_stats.io.incoming.blocks c blocks host ID pollster Aggregated number of blocks received to block device
hardware.system_stats.io.outgoing.blocks c blocks host ID pollster Aggregated number of blocks sent to block device
hardware.system_stats.cpu.idle g % host ID pollster CPU idle percentage
======================================== ===== ========= ======== ======== ====================================================
::
Legend:
*
[g]: gauge
[c]: cumulative
Dynamically retrieving the Meters via ceilometer client
=======================================================
To retrieve the available meters that can be queried given the actual
resource instances available, use the ``meter-list`` command:
::
$ ceilometer meter-list
+------------+-------+--------------------------------------+---------+----------------------------------+
| Name | Type | Resource ID | User ID | Project ID |
+------------+-------+--------------------------------------+---------+----------------------------------+
| image | gauge | 09e84d97-8712-4dd2-bcce-45970b2430f7 | | 57cf6d93688e4d39bf2fe3d3c03eb326 |
Naming convention
=================
If you plan on adding meters, please follow the convention below:
1. Always use '.' as separator and go from least to most discriminant word.
For example, do not use ephemeral_disk_size but disk.ephemeral.size
2. When a part of the name is a variable, it should always be at the end and start with a ':'.
For example do not use <type>.image but image:<type>, where type is your variable name.
3. If you have any hesitation, come and ask in #openstack-ceilometer
User-defined sample metadata for Nova
=========================================
Users are allowed to add additional metadata to samples of nova meter.
These additional metadata are stored in 'resource_metadata.user_metadata.*' of the sample.
To do so, users can add nova user metadata prefixed with 'metering.':
::
$ nova boot --meta metering.custom_metadata=a_value my_vm
Or users can define metadata keys they cared without any prefix in ceilometer.conf.
For example,if users need to add "fqdn" of metadata to samples,
they can add or modify as below into ceilometer.conf in [DEFAULT] group:
::
reserved_metadata_keys=fqdn
Note: The name of the metadata shouldn't exceed 256 characters otherwise it will be cut off.
Also, if it has '.', this will be replaced by a '_' in ceilometer.
User-defined sample metadata for Swift
==========================================
It's possible to add additional metadata to sample of Swift meter as well.
You might specify headers whose values will be stored in resource_metadata as
'resource_metadata.http_header_$name', where $name is a name of the header with
'-' replaced by '_'.
This is done using 'metadata_headers' option in middleware configuration,
refer to :ref:`installing_manually` for details.
For example, this could be used to distinguish external and internal users. You'd
have to implement a custom Swift middleware that sets a proper header and just add
it to metadata_headers.
OSprofiler data
===============
All messages with event type "profiler.*" will be collected as profiling data.
Using notification plugin profiler/notifications.py.
.. note::
Be sparing with heavy usage of OSprofiler, especially in case of complex
operations like booting and deleting instance that may create over 100kb of
sample data per each request.
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