+++ /dev/null
-.. This work is licensed under a Creative Commons Attribution 4.0 International License.
-.. http://creativecommons.org/licenses/by/4.0
-
-=========================================
-OpenStack NOVA API for marking host down.
-=========================================
-
-Related Blueprints:
-===================
-
- https://blueprints.launchpad.net/nova/+spec/mark-host-down
- https://blueprints.launchpad.net/python-novaclient/+spec/support-force-down-service
-
-What the API is for
-===================
-
- This API will give external fault monitoring system a possibility of telling
- OpenStack Nova fast that compute host is down. This will immediately enable
- calling of evacuation of any VM on host and further enabling faster HA
- actions.
-
-What this API does
-==================
-
- In OpenStack the nova-compute service state can represent the compute host
- state and this new API is used to force this service down. It is assumed
- that the one calling this API has made sure the host is also fenced or
- powered down. This is important, so there is no chance same VM instance will
- appear twice in case evacuated to new compute host. When host is recovered
- by any means, the external system is responsible of calling the API again to
- disable forced_down flag and let the host nova-compute service report again
- host being up. If network fenced host come up again it should not boot VMs
- it had if figuring out they are evacuated to other compute host. The
- decision of deleting or booting VMs there used to be on host should be
- enhanced later to be more reliable by Nova blueprint:
- https://blueprints.launchpad.net/nova/+spec/robustify-evacuate
-
-REST API for forcing down:
-==========================
-
- Parameter explanations:
- tenant_id: Identifier of the tenant.
- binary: Compute service binary name.
- host: Compute host name.
- forced_down: Compute service forced down flag.
- token: Token received after successful authentication.
- service_host_ip: Serving controller node ip.
-
- request:
- PUT /v2.1/{tenant_id}/os-services/force-down
- {
- "binary": "nova-compute",
- "host": "compute1",
- "forced_down": true
- }
-
- response:
- 200 OK
- {
- "service": {
- "host": "compute1",
- "binary": "nova-compute",
- "forced_down": true
- }
- }
-
- Example:
- curl -g -i -X PUT http://{service_host_ip}:8774/v2.1/{tenant_id}/os-services
- /force-down -H "Content-Type: application/json" -H "Accept: application/json
- " -H "X-OpenStack-Nova-API-Version: 2.11" -H "X-Auth-Token: {token}" -d '{"b
- inary": "nova-compute", "host": "compute1", "forced_down": true}'
-
-CLI for forcing down:
-=====================
-
- nova service-force-down <hostname> nova-compute
-
- Example:
- nova service-force-down compute1 nova-compute
-
-REST API for disabling forced down:
-===================================
-
- Parameter explanations:
- tenant_id: Identifier of the tenant.
- binary: Compute service binary name.
- host: Compute host name.
- forced_down: Compute service forced down flag.
- token: Token received after successful authentication.
- service_host_ip: Serving controller node ip.
-
- request:
- PUT /v2.1/{tenant_id}/os-services/force-down
- {
- "binary": "nova-compute",
- "host": "compute1",
- "forced_down": false
- }
-
- response:
- 200 OK
- {
- "service": {
- "host": "compute1",
- "binary": "nova-compute",
- "forced_down": false
- }
- }
-
- Example:
- curl -g -i -X PUT http://{service_host_ip}:8774/v2.1/{tenant_id}/os-services
- /force-down -H "Content-Type: application/json" -H "Accept: application/json
- " -H "X-OpenStack-Nova-API-Version: 2.11" -H "X-Auth-Token: {token}" -d '{"b
- inary": "nova-compute", "host": "compute1", "forced_down": false}'
-
-CLI for disabling forced down:
-==============================
-
- nova service-force-down --unset <hostname> nova-compute
-
- Example:
- nova service-force-down --unset compute1 nova-compute
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