Public bug reported: As an operator, I want to be able to use oslo healthcheck middleware[1] to Nova's pipeline so that I can GET the /healthcheck URI to determine "up" or not for a given nova-api host. The healthcheck middleware allows for manually setting the health status to offline, without actually stopping the API service. When I can do this, I can easily "take an API node offline" from the aspect of the load balancer, which uses the healthcheck path for status checks, before stopping the API process itself. This is a quick and generic way to prevent new connections to a given API node while restarting it as part of a rolling restart.
This middleware has already been added to glance[2], and I've got an open review to add it to keystone as well[3]. My eventual goal is to have it in use across all the services that directly listen for client connections. 1: http://docs.openstack.org/developer/oslo.middleware/healthcheck_plugins.html 2: https://review.openstack.org/#/c/148595/ 3: https://review.openstack.org/#/c/387731/ ** Affects: nova Importance: Undecided Status: New -- You received this bug notification because you are a member of Yahoo! Engineering Team, which is subscribed to OpenStack Compute (nova). https://bugs.launchpad.net/bugs/1637483 Title: Add healthcheck middleware to pipelines Status in OpenStack Compute (nova): New Bug description: As an operator, I want to be able to use oslo healthcheck middleware[1] to Nova's pipeline so that I can GET the /healthcheck URI to determine "up" or not for a given nova-api host. The healthcheck middleware allows for manually setting the health status to offline, without actually stopping the API service. When I can do this, I can easily "take an API node offline" from the aspect of the load balancer, which uses the healthcheck path for status checks, before stopping the API process itself. This is a quick and generic way to prevent new connections to a given API node while restarting it as part of a rolling restart. This middleware has already been added to glance[2], and I've got an open review to add it to keystone as well[3]. My eventual goal is to have it in use across all the services that directly listen for client connections. 1: http://docs.openstack.org/developer/oslo.middleware/healthcheck_plugins.html 2: https://review.openstack.org/#/c/148595/ 3: https://review.openstack.org/#/c/387731/ To manage notifications about this bug go to: https://bugs.launchpad.net/nova/+bug/1637483/+subscriptions -- Mailing list: https://launchpad.net/~yahoo-eng-team Post to : [email protected] Unsubscribe : https://launchpad.net/~yahoo-eng-team More help : https://help.launchpad.net/ListHelp
