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standby switchover: improve handling of node rejoin failure

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Explicitly check whether the "repmgr node rejoin" command on the
demotion candidate succeeded. Due to the way SSH execution is
currently implemented, we can return either the command execution
status or the command output; to ensure any errors are available,
log them to a temporary file on the demotion candidate and note
its location in case of an error.

While we're at it, improve error message handling when the demotion
candidate fails to rejoin.
This commit is contained in:
Ian Barwick
2021-07-28 11:42:08 +09:00
parent 55efbe60ea
commit 5f1ba6db3d
4 changed files with 159 additions and 60 deletions
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@@ -1,4 +1,5 @@
5.3.0 2021-??-??
standby switchover: improve handling of node rejoin failure (Ian)
repmgrd: prefix all shared library functions with "repmgr_" to
minimize the risk of clashes with other shared libraries (Ian)
repmgrd: at startup, if node record is marked as "inactive", attempt