Public bug reported: Liberty introduced the RPC callback mechanism, which is mainly used by QoS so far, and planned to be reused in general as notification for neutron versioned objects, when we have those more widely implemented.
The mechanism relies on updating agents with fanout notifications per object version, as versioned objects have the ability to downgrade themselves before serialization, allowing older agents to still understand such objects. We lack a mechanism to identify the running agent versions, and calculate, on realtime, the version set that we need to fanout for every resource type we push through the API to the RPC callback subscribers. A devref with the logic was merged here: https://review.openstack.org/#/c/241154/ Implementation is being developed on this topic: https://review.openstack.org/#/q/topic:rpccallback-upgrades ** Affects: neutron Importance: Medium Assignee: Miguel Angel Ajo (mangelajo) Status: In Progress ** Changed in: neutron Importance: Undecided => High ** Changed in: neutron Assignee: (unassigned) => Miguel Angel Ajo (mangelajo) ** Changed in: neutron Importance: High => Medium -- You received this bug notification because you are a member of Yahoo! Engineering Team, which is subscribed to neutron. https://bugs.launchpad.net/bugs/1535247 Title: rpc callback mechanism does not support upgrades Status in neutron: In Progress Bug description: Liberty introduced the RPC callback mechanism, which is mainly used by QoS so far, and planned to be reused in general as notification for neutron versioned objects, when we have those more widely implemented. The mechanism relies on updating agents with fanout notifications per object version, as versioned objects have the ability to downgrade themselves before serialization, allowing older agents to still understand such objects. We lack a mechanism to identify the running agent versions, and calculate, on realtime, the version set that we need to fanout for every resource type we push through the API to the RPC callback subscribers. A devref with the logic was merged here: https://review.openstack.org/#/c/241154/ Implementation is being developed on this topic: https://review.openstack.org/#/q/topic:rpccallback-upgrades To manage notifications about this bug go to: https://bugs.launchpad.net/neutron/+bug/1535247/+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
