9.9 KiB
Integrating OpenStack Telemetry alarming with Picasso
OpenStack Aodh is the alarming service for OpenStack Telemetry. The Ceilometer service collects and transforms data from OpenStack services. Using Aodh, users/operators are able to setup alarms to trigger based on custom rules. This is useful for autoscaling, which is provided by Heat.
Deploying DevStack
To see how Aodh can be integrated with Picasso, we recommend using DevStack as the simplest and fastest way to get both Aodh and Picasso services running along with Nova, Glance and Neutron services. In order to get DevStack use following commands:
export DEVSTACK_DIR=~/devstack
git clone git://git.openstack.org/openstack-dev/devstack.git $DEVSTACK_DIR
Create a file, $DEVSTACK_DIR/local.conf with the following text:
[[local|localrc]]
enable_plugin aodh https://git.openstack.org/openstack/aodh
enable_plugin functions_plugin git@github.com:iron-io/functions-devstack-plugin.git master
Start DevStack installation
./stack.sh
Creating app and route
Once DevStack is installed, create a Picasso app:
openstack fn apps create alarm-notifier-app
+-------------+--------------------------------------------------+
| Field | Value |
+-------------+--------------------------------------------------+
| name | alarm-notifier-app-f6fdaab020e |
| created_at | 2016-12-12 18:08:26.077455 |
| updated_at | 2016-12-12 18:08:26.077477 |
| project_id | f6fdaab020ec4cdf85db3740520ec658 |
| config | None |
| id | f012ff74ea1c43b6a12c3c946fe96de5 |
| description | App for project f6fdaab020ec4cdf85db3740520ec658 |
+-------------+--------------------------------------------------+
Create a route:
openstack fn routes create alarm-notifier-app-f6fdaab020e /hello async iron/hello --is-public
+-----------------+------------+
| Field | Value |
+-----------------+------------+
| image | iron/hello |
| memory | 128 |
| max_concurrency | 1 |
| timeout | 30 |
| path | /hello |
| is_public | True |
| type | async |
+-----------------+------------+
Bootstrap VM on cirros image:
nova boot --image $(glance image-list | awk '/cirros-0.3.4-x86_64-uec / {print $2}') --flavor 42 test_alarms
+--------------------------------------+----------------------------------------------------------------+
| Property | Value |
+--------------------------------------+----------------------------------------------------------------+
| OS-DCF:diskConfig | MANUAL |
| OS-EXT-AZ:availability_zone | |
| OS-EXT-STS:power_state | 0 |
| OS-EXT-STS:task_state | scheduling |
| OS-EXT-STS:vm_state | building |
| OS-SRV-USG:launched_at | - |
| OS-SRV-USG:terminated_at | - |
| accessIPv4 | |
| accessIPv6 | |
| adminPass | C9bfvqY4p3Lz |
| config_drive | |
| created | 2016-12-12T22:17:56Z |
| description | - |
| flavor | m1.nano (42) |
| hostId | |
| id | 7a4822c5-9fd4-44af-a54e-daef65650ca7 |
| image | cirros-0.3.4-x86_64-uec (b60ad91d-2917-46b2-881c-0c5a277c6f8d) |
| key_name | - |
| locked | False |
| metadata | {} |
| name | test_alarms |
| os-extended-volumes:volumes_attached | [] |
| progress | 0 |
| security_groups | default |
| status | BUILD |
| tags | [] |
| tenant_id | f6fdaab020ec4cdf85db3740520ec658 |
| updated | 2016-12-12T22:17:56Z |
| user_id | d0ec76f99e3c4e588119c8f6858a4ba3 |
+--------------------------------------+----------------------------------------------------------------+
Create Aodh alarm:
aodh alarm create \
--type threshold \
--name cpu_high \
--description 'instance running hot' \
--meter-name cpu_util \
--threshold 20.0 \
--comparison-operator gt \
--statistic max \
--period 600 \
--evaluation-periods 1 \
--alarm-action $(openstack fn routes expose-url testapp-f6fdaab020ec4cdf85db37 /hello) \
--query resource_id=$(nova list | grep test_alarms | awk '{print $2}')
+---------------------------+------------------------------------------------------------------------+
| Field | Value |
+---------------------------+------------------------------------------------------------------------+
| alarm_actions | [u'http://192.168.0.114:10001/r/testapp-f6fdaab020ec4cdf85db37/hello'] |
| alarm_id | f3460bad-2b5c-4c2f-b6e0-e82973e6ec71 |
| comparison_operator | gt |
| description | instance running hot |
| enabled | True |
| evaluation_periods | 1 |
| exclude_outliers | False |
| insufficient_data_actions | [] |
| meter_name | cpu_util |
| name | cpu_high |
| ok_actions | [] |
| period | 600 |
| project_id | f6fdaab020ec4cdf85db3740520ec658 |
| query | resource_id = 7a4822c5-9fd4-44af-a54e-daef65650ca7 AND |
| | project_id = f6fdaab020ec4cdf85db3740520ec658 |
| repeat_actions | False |
| severity | low |
| state | insufficient data |
| state_timestamp | 2016-12-12T22:20:48.030596 |
| statistic | max |
| threshold | 20.0 |
| time_constraints | [] |
| timestamp | 2016-12-12T22:20:48.030596 |
| type | threshold |
| user_id | d0ec76f99e3c4e588119c8f6858a4ba3 |
+---------------------------+------------------------------------------------------------------------+
To trigger the alarm, generate CPU load on the provisioned VM:
ssh cirros@10.0.0.7
cirros@10.0.0.7 password:
dd if=/dev/zero of=/dev/null
Once our threshold has been reached, Aodh will notify with an HTTP Callback to our async function assigned to the route we created.
Conclusion
Picasso's ability to provide public sync/async function routes can be used to integrate with web hooks, such as Aodh, the OpenStack Telemetry alarming service.