Doctor capabilities and usage¶
Immediate Notification¶
Immediate notification can be used by creating ‘event’ type alarm via OpenStack Alarming (Aodh) API with relevant internal components support.
See, upstream spec document: http://specs.openstack.org/openstack/ceilometer-specs/specs/liberty/event-alarm-evaluator.html
An example of a consumer of this notification can be found in the Doctor repository. It can be executed as follows:
git clone https://gerrit.opnfv.org/gerrit/doctor -b stable/brahmaputra
cd doctor/tests
CONSUMER_PORT=12346
python consumer.py "$CONSUMER_PORT" > consumer.log 2>&1 &
Consistent resource state awareness¶
Resource state of compute host can be changed/updated according to a trigger from a monitor running outside of OpenStack Compute (Nova) by using force-down API.
See http://artifacts.opnfv.org/doctor/brahmaputra/docs/manuals/mark-host-down_manual.html for more detail.
Valid compute host status given to VM owner¶
The resource state of a compute host can be retrieved by a user with the OpenStack Compute (Nova) servers API.
See http://artifacts.opnfv.org/doctor/docs/manuals/get-valid-server-state.html for more detail.