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OpenStack Queens : How to use Aodh
2018/03/17 |
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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 ] | | [ Storage Node ] | | [ Compute Node ] |
| | | | | |
| MariaDB RabbitMQ | | Open_vSwitch | | Libvirt |
| Memcached httpd | | L2_Agent | | Nova_Compute |
| Keystone Glance | | L3_Agent | | Open_vSwitch |
| Nova_API Cinder_API | | Metadata_Agent | | L2_Agent |
| Neutron_Server | | Cinder_Volume | | Ceilometer_Compute |
| Metadata_Agent | | Heat_API | | |
| Gnocchi | | Heat Engine | | |
| Ceilometer_Central | | | | |
| Aodh_Evaluator | | | | |
+-----------------------+ +-----------------------+ +-----------------------+
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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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[cent@dlp ~(keystone)]$ openstack server list +-----------+----------+---------+-----------------------------------+---------+----------+ | ID | Name | Status | Networks | Image | Flavor | +-----------+----------+---------+-----------------------------------+---------+----------+ | 636608e8- | CentOS_7 | SHUTOFF | int_net=192.168.100.7, 10.0.0.202 | CentOS7 | m1.small | +-----------+----------+---------+-----------------------------------+---------+----------+[cent@dlp ~(keystone)]$ INSTANS_ID=$(openstack server list | grep CentOS_7 | awk '{print $2}') [cent@dlp ~(keystone)]$ 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 $INSTANS_ID +---------------------------+--------------------------------------+ | Field | Value | +---------------------------+--------------------------------------+ | aggregation_method | mean | | alarm_actions | [] | | alarm_id | 04f4bf40-1caf-4b6c-a5f7-9aff0e3584fa | | comparison_operator | gt | | description | CPU High Average | | enabled | True | | evaluation_periods | 1 | | granularity | 300 | | insufficient_data_actions | [] | | metric | cpu_util | | name | cpu_hi | | ok_actions | [] | | project_id | 52e02649325e4cf1b903d00cadb8fad2 | | repeat_actions | False | | resource_id | 636608e8-381f-4adc-84c9-35d6f5eabe60 | | resource_type | instance | | severity | low | | state | insufficient data | | state_reason | Not evaluated yet | | state_timestamp | 2018-03-19T06:25:37.972478 | | threshold | 70.0 | | time_constraints | [] | | timestamp | 2018-03-19T06:25:37.972478 | | type | gnocchi_resources_threshold | | user_id | 3fc6c62eb5aa440aaa1eaf745faa35d6 | +---------------------------+--------------------------------------+ # after creating, [state] is [insufficient data] because meters are not evaluated yet [cent@dlp ~(keystone)]$ openstack alarm list +--------------+-----------------------------+--------+-------------------+----------+---------+ | alarm_id | type | name | state | severity | enabled | +--------------+-----------------------------+--------+-------------------+----------+---------+ | 04f4bf40-... | gnocchi_resources_threshold | cpu_hi | insufficient data | low | True | +--------------+-----------------------------+--------+-------------------+----------+---------+ # if meters has been not evaluated, state turns to [ok] [cent@dlp ~(keystone)]$ openstack alarm list +--------------------------------------+-----------------------------+--------+-------+----------+---------+ | alarm_id | type | name | state | severity | enabled | +--------------------------------------+-----------------------------+--------+-------+----------+---------+ | 04f4bf40-1caf-4b6c-a5f7-9aff0e3584fa | 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] [cent@dlp ~(keystone)]$ openstack alarm list +--------------------------------------+-----------------------------+--------+-------+----------+---------+ | alarm_id | type | name | state | severity | enabled | +--------------------------------------+-----------------------------+--------+-------+----------+---------+ | 04f4bf40-1caf-4b6c-a5f7-9aff0e3584fa | gnocchi_resources_threshold | cpu_hi | alarm | low | True | +--------------------------------------+-----------------------------+--------+-------+----------+---------+ # if cpu_util of instance would be under 70%, state would be back to [ok] state [cent@dlp ~(keystone)]$ openstack alarm list +--------------------------------------+-----------------------------+--------+-------+----------+---------+ | alarm_id | type | name | state | severity | enabled | +--------------------------------------+-----------------------------+--------+-------+----------+---------+ | 04f4bf40-1caf-4b6c-a5f7-9aff0e3584fa | gnocchi_resources_threshold | cpu_hi | ok | low | True | +--------------------------------------+-----------------------------+--------+-------+----------+---------+ # show histories of an alarm [cent@dlp ~(keystone)]$ openstack alarm-history show 04f4bf40-1caf-4b6c-a5f7-9aff0e3584fa
+----------------------------+------------------+--------------------------------------------------------
| timestamp | type | detail
+----------------------------+------------------+--------------------------------------------------------
| 2018-03-19T06:38:45.332362 | state transition | {"transition_reason": "Transition to ok due to 1 sam...
| 2018-03-19T06:33:33.197786 | state transition | {"transition_reason": "Transition to alarm due to 1 ...
| 2018-03-19T06:25:37.972478 | creation | {"state_reason": "Not evaluated yet", "user_id": "3f...
+----------------------------+------------------+--------------------------------------------------------
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