** Also affects: ovn (Ubuntu)
Importance: Undecided
Status: New
** Description changed:
The upstream recommendation for upgrades of OVN is to first upgrade the
data plane components (chassis aka. ovn-controller), and then upgrade
the central components (the database schema and ovn-northd). The
rationale for this is that the new version of the ovn-controller is
required to cope with any changes to database schema or how northd
programs flows.
However, during the course of rapid OVN development there has also been
introduced changes that make the new ovn-controller not cope with a old
database schema, breaking the recommended upgrade procedure.
To cope with this upstream has introduced a new optional configuration
for the ovn-controller that allows it to detect version inconsistencies,
and when they are present stop it from making changes to the data plane
until the version inconsistency is resolved [0].
- The charms should enable this option to allow upgrades to progress with
- less data plane outage.
+ For the above mentioned configuration to be effective we also need the
+ package to call ``ovn-ctl stop_controller`` with the --restart option so
+ that the ovn-controller does not flush the installed flows on exit.
+
+ We should make required changes to packages and charms to allow upgrades
+ to progress with less data plane outage.
0: https://github.com/ovn-
org/ovn/commit/1dd27ea7aea40122c1edbff845e14abaa70c0413
** Also affects: ovn (Ubuntu Hirsute)
Importance: Undecided
Status: New
** Also affects: ovn (Ubuntu Focal)
Importance: Undecided
Status: New
** Also affects: ovn (Ubuntu Impish)
Importance: Undecided
Status: New
** Changed in: ovn (Ubuntu Impish)
Status: New => In Progress
** Changed in: ovn (Ubuntu Impish)
Importance: Undecided => High
** Changed in: ovn (Ubuntu Impish)
Assignee: (unassigned) => Frode Nordahl (fnordahl)
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https://bugs.launchpad.net/bugs/1940043
Title:
Upgrade from OVN 20.03 to newer OVN version will cause data plane
outage
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