starlingx/docs
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docs/doc/source/updates/kubernetes/overview-of-upgrade-abort-procedure.rst
Ron Stone f125a8b892 Remove spurious escapes (r8,dsR8) 
This change addresses a long-standing issue in rST documentation imported from XML.
That import process added backslash escapes in front of various characters. The three
most common being '(', ')', and '_'.
These instances are removed.

Signed-off-by: Ron Stone <ronald.stone@windriver.com>
Change-Id: Id43a9337ffcd505ccbdf072d7b29afdb5d2c997e
2023-03-01 11:19:04 +00:00

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Overview of Upgrade Abort Procedure

You can abort an upgrade procedure if necessary.

There are two cases for aborting an upgrade:

  • Before controller-0 has been upgraded (that is, only controller-1 has been upgraded): In this case the upgrade can be aborted and the system will remain in service during the abort.
  • After controller-0 has been upgraded (that is, both controllers have been upgraded): In this case the upgrade can only be aborted with a complete outage and a re-install of all hosts. This would only be done as a last resort, if there was absolutely no other way to recover the system.
  • Rolling Back a Software Upgrade Before the Second Controller Upgrade <rolling-back-a-software-upgrade-before-the-second-controller-upgrade>
  • Rolling Back a Software Upgrade After the Second Controller Upgrade <rolling-back-a-software-upgrade-after-the-second-controller-upgrade>