A number of C functions were added in releases 4.2 to 4.4; however
these were renamed in 5.3 to prevent naming clashes with other
extensions.
This does however mean that when upgrading from one of the above
versions, the intermediate upgrade steps will attempt to create
SQL functions referencing C functions which no longer exist in
repmgr.so, and hence cause the upgrade to fail.
We can work around this by providing empty upgrade scripts
from these versions to 4.4, which skip the problematic CREATE
FUNCTION commands. The functions will be correctly created in
the 5.2--5.3 upgrade script.
When recovering from degraded state in local node monitoring, in some
cases a new connection was opened to the local node without closing
the old one, which will result in memory leakage.
Remove bogus -W option in "repmgr standby follow" example invocation
for the "follow_command" parameter.
The option (which corresponds to "--no-wait") is not used by
"repmgr standby follow".
Per report from Jimmy Angelakos.
Commit 79d1f00 modified repmgrd to automatically set an inactive node
to "active" at startup.
However we need to avoid doing that for cases where the node role has
changed (e.g. a former primary was recloned as a standby) but the node
record was not updated.
From PostgreSQL 9.4 (commit e7128e8d), explicit function prototypes
are not required as they will be generated by the PG_FUNCTION_INFO_V1
macro.
(We were supporting PostgreSQL 9.3 until relatively recently, so there
was nothing particular to gain by removing these earlier).
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.
- state how many nodes are to be operated on
- if errors were encountered with any nodes, emit the total number
of nodes as well as the number of affected nodes
- log nodes where repmgrd was not running anyway as NOTICE, not
WARNING
Unfortunately it hasn't been possible yet to include all available
configuration items in the main documentation, but we should at least
make it easier to find the full list.
