OpenStack Queens : How to use Aodh2018/06/20 |
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This is how to use OpenStack Alarming Service (Aodh).
This example is based on the emvironment like follows.
------------+---------------------------+---------------------------+------------
| | |
eth0|10.0.0.30 eth0|10.0.0.50 eth0|10.0.0.51
+-----------+-----------+ +-----------+-----------+ +-----------+-----------+
| [ Control Node ] | | [ Network Node ] | | [ Compute Node ] |
| | | | | |
| MariaDB RabbitMQ | | Linux Bridge | | Libvirt |
| Memcached httpd | | L2_Agent | | Nova_Compute |
| Keystone Glance | | L3_Agent | | Linux Bridge |
| Nova_API Cinder_API | | Metadata_Agent | | L2_Agent |
| Neutron_Server | | Cinder_Volume | | Ceilometer_Compute |
| Metadata_Agent | | Heat_API | | |
| Aodh_Evaluator | | Heat Engine | | |
| | | Gnocchi httpd | | |
| | | Ceilometer_Central | | |
+-----------------------+ +-----------------------+ +-----------------------+
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| [1] | Login as a user you'd like to set Alarm for your own Instances. For example, create an Alarm which alarms the cpu_util of an instance is over 70%. |
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ubuntu@dlp ~(keystone)$ openstack server list +--------------+-------------+---------+-----------------------------------+------------+----------+ | ID | Name | Status | Networks | Image | Flavor | +--------------+-------------+---------+-----------------------------------+------------+----------+ | 589e01b2-... | Ubuntu_1804 | SHUTOFF | int_net=192.168.100.4, 10.0.0.205 | Ubuntu1804 | m1.small | +--------------+-------------+---------+-----------------------------------+------------+----------+ubuntu@dlp ~(keystone)$ INSTANS_ID=$(openstack server list | grep Ubuntu_1804 | awk '{print $2}') ubuntu@dlp ~(keystone)$ openstack alarm create \
--name cpu_hi \ --type gnocchi_resources_threshold \ --description 'CPU High Average' \ --metric cpu_util \ --threshold 70.0 \ --comparison-operator gt \ --aggregation-method mean \ --granularity 300 \ --evaluation-periods 1 \ --resource-type instance \ --resource-id $INSTANS_ID +---------------------------+--------------------------------------+ | Field | Value | +---------------------------+--------------------------------------+ | aggregation_method | mean | | alarm_actions | [] | | alarm_id | 92e9b8e2-b0ef-4e1d-9d7f-b79e5656ff47 | | comparison_operator | gt | | description | CPU High Average | | enabled | True | | evaluation_periods | 1 | | granularity | 300 | | insufficient_data_actions | [] | | metric | cpu_util | | name | cpu_hi | | ok_actions | [] | | project_id | 04a16d601dc940dd845f3092ce2712e8 | | repeat_actions | False | | resource_id | 589e01b2-0311-4250-a367-becc9cf59ff1 | | resource_type | instance | | severity | low | | state | insufficient data | | state_reason | Not evaluated yet | | state_timestamp | 2018-06-20T14:09:30.973108 | | threshold | 70.0 | | time_constraints | [] | | timestamp | 2018-06-20T14:09:30.973108 | | type | gnocchi_resources_threshold | | user_id | 601473fae2c444a484860046ef2484e2 | +---------------------------+--------------------------------------+ # after creating, [state] is [insufficient data] because meters are not evaluated yet ubuntu@dlp ~(keystone)$ openstack alarm list +--------------------------------------+-----------------------------+--------+-------------------+----------+---------+ | alarm_id | type | name | state | severity | enabled | +--------------------------------------+-----------------------------+--------+-------------------+----------+---------+ | 92e9b8e2-b0ef-4e1d-9d7f-b79e5656ff47 | gnocchi_resources_threshold | cpu_hi | insufficient data | low | True | +--------------------------------------+-----------------------------+--------+-------------------+----------+---------+ # if meters has been evaluated when target instance is running, state turns to [ok] ubuntu@dlp ~(keystone)$ openstack alarm list +--------------------------------------+-----------------------------+--------+-------+----------+---------+ | alarm_id | type | name | state | severity | enabled | +--------------------------------------+-----------------------------+--------+-------+----------+---------+ | 92e9b8e2-b0ef-4e1d-9d7f-b79e5656ff47 | gnocchi_resources_threshold | cpu_hi | ok | low | True | +--------------------------------------+-----------------------------+--------+-------+----------+---------+ # if target instance is running and the cpu_util of it would be over 70%, state turns to [alarm] ubuntu@dlp ~(keystone)$ openstack alarm list +--------------------------------------+-----------------------------+--------+-------+----------+---------+ | alarm_id | type | name | state | severity | enabled | +--------------------------------------+-----------------------------+--------+-------+----------+---------+ | 92e9b8e2-b0ef-4e1d-9d7f-b79e5656ff47 | gnocchi_resources_threshold | cpu_hi | alarm | low | True | +--------------------------------------+-----------------------------+--------+-------+----------+---------+ # if cpu_util of instance would be under 70%, state would be back to [ok] state ubuntu@dlp ~(keystone)$ openstack alarm list +--------------------------------------+-----------------------------+--------+-------+----------+---------+ | alarm_id | type | name | state | severity | enabled | +--------------------------------------+-----------------------------+--------+-------+----------+---------+ | 92e9b8e2-b0ef-4e1d-9d7f-b79e5656ff47 | gnocchi_resources_threshold | cpu_hi | ok | low | True | +--------------------------------------+-----------------------------+--------+-------+----------+---------+ # show histories of an alarm ubuntu@dlp ~(keystone)$ openstack alarm-history show 92e9b8e2-b0ef-4e1d-9d7f-b79e5656ff47
+----------------------------+------------------+----------------------------------------------------------
| timestamp | type | detail
+----------------------------+------------------+----------------------------------------------------------
| 2018-06-20T14:23:01.275111 | state transition | {"transition_reason": "Transition to ok due to 1 sampl...
| 2018-06-20T14:18:01.302110 | state transition | {"transition_reason": "Transition to alarm due to 1 sa...
| 2018-06-20T14:09:30.973108 | creation | {"state_reason": "Not evaluated yet", "user_id": "6014...
+----------------------------+------------------+----------------------------------------------------------
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