Fix live migration RPC compatibility with older versions
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
openstack-manuals |
Fix Released
|
High
|
Thorking |
Bug Description
https:/
commit e7828d91aa3ec5a
Author: Dan Smith <email address hidden>
Date: Tue Jan 6 10:41:41 2015 -0800
Fix live migration RPC compatibility with older versions
In commit bc45c56f102cdef
RPC APIs were changed such that they intentionally wouldn't communicate
with older versions that don't provide the extra parameters that were
added. This breaks people using live migration to move workloads between
icehouse and juno compute nodes during an upgrade. It also generally
runs counter to our policies regarding RPC API compatibility.
The original bug only affected shared block storage users, which means
a large portion of users aren't even affected. Thus, this patch restores
compatibility with the older versions in all cases, but logs weighty
warning messages for the operators when a migration is performed that
looks to be affected by the bug. If we have enough information to
determine that the migration is not affected, we avoid the warning, but
otherwise err on the side of caution. If an operator is not actually
affected by the bug, they will see the warnings while the RPC API
version cap is in place (i.e. during the upgrade window) and then
the warnings will stop once it is removed.
UpgradeImpact: This will resolve upgrade issues from Icehouse->Juno
when using live migration.
DocImpact: Documenting the potential for data loss when migrating from
Icehouse to Juno when using live migration is something operators should
be aware of.
Conflicts:
NOTE(mriedem): The rpcapi conflict was due to jsonutils not being
on master. The test conflicts were due to the modules being moved
on master.
Change-Id: I5651fb7ba95f38
Closes-Bug: #1402813
(cherry picked from commit 5477faab6740f1d
Changed in openstack-manuals: | |
status: | New → Confirmed |
importance: | Undecided → High |
milestone: | none → kilo |
Changed in openstack-manuals: | |
milestone: | kilo → liberty |
Changed in openstack-manuals: | |
assignee: | nobody → Thorking (thorking2) |
Fix proposed to branch: master /review. openstack. org/202950
Review: https:/