Objects: Improve instance action events to contain more messages

Registered by Qiu Yu on 2013-11-26

This bp is a placeholder for several misc issues I found when playing with instance action events.

## PHASE 1 ##

* feature parity with instance fault
--
Instance faults table is going to be removed with following BP
https://blueprints.launchpad.net/nova/+spec/remove-instance-fault-table

However, not all information exposed by Instance Fault table, e.g. "host" and "details", are available with Instance Action Events. Both could be useful for recording more event details

* instance action/event refacoring
--
One issue with current instance action/event model is, event is now for manager level (compute, scheduler, and maybe conductor manager if future) method call, and is always has two steps of start/finish in mind.

However, it is useful to create one-shot event record (no finish) and ability to update details of what is happening inside major manager level event.

## PHASE 2 ##

Splitted second phase of work into another blueprint
https://blueprints.launchpad.net/nova/+spec/improve-instance-action-events-2

Blueprint information

Status:
Started
Approver:
Andrew Laski
Priority:
Medium
Drafter:
Qiu Yu
Direction:
Needs approval
Assignee:
Qiu Yu
Definition:
Review
Series goal:
None
Implementation:
Needs Code Review
Milestone target:
milestone icon next
Started by
Qiu Yu on 2013-12-10

Related branches

Sprints

Whiteboard

Merged:
======

Addressed by: https://review.openstack.org/6144
    Add host and details column to instance_actions_events table

Pending patches:
=============

Gerrit topic: https://review.openstack.org/#q,topic:bp/improve-instance-action-events,n,z

Addressed by: https://review.openstack.org/62871
    Add pack_action_event_start/finish to InstanceActionEvent object

Addressed by: https://review.openstack.org/72391
    Add 'host' and 'detail' support to instance action event object

Addressed by: https://review.openstack.org/74060
    Add event create and update db api and object method

Addressed by: https://review.openstack.org/61516
    Add 'host' and 'details' to instance action get API response

Abandoned patches:
===============

Addressed by: https://review.openstack.org/61050
    Add action_event_create and action_event_update api to conductor

Addressed by: https://review.openstack.org/58321
    Use action_event_{create, update} for instance action events update

[alaski] I like the direction of both phases here, but since they're two distinct bodies of work could you please split this into two blueprints. Just splitting out phase #2 into a new one and removing it from this one would be best.

[qiuyu] Done. Phase #2 splitted to https://blueprints.launchpad.net/nova/+spec/improve-instance-action-events-2

Apologies, this missed the deadline for Feature Freeze. Please rebase patches as soon as Juno opens, and we will try to get this in during that period. --johnthetubaguy (5th March 2014)

Unapproved - please re-submit via nova-spec --johnthetubagy (20th March 2014)

(?)

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