This suppresses display of the usually lengthy "conninfo" column, mainly
useful for generating a compact table suitable for pasting into emails,
chats etc. without messy line breaks.
Implements GitHub #521.
Previously repmgr would abort with an unhelpful message about being
unable to parse CSV output.
With this commit, it will continue running, and display a list of
inaccessible nodes as an addendum to the main output (unless --csv
or --terse options are specified).
Addresses GitHub #246.
Also we can now simplify "cluster (matrix|crosscheck)" commands as
beginning with v4.0, we know where the configuration file is, so can
provide that when invoking repmgr remotely.
This is to facilitate remote invocation of repmgr when the repmgr
binary is located somewhere other than the PostgreSQL binary directory, as it
cannot be assumed all package maintainers will install repmgr there.
This parameter is optional; if not set (the default), repmgr will fall back
to "pg_bindir" (if set).
Addresses GitHub #246.
In some circumstances, e.g. while performing a switchover, it is essential
that repmgrd does not take any kind of failover action, as this will put
the cluster into an incorrect state.
Previously it was necessary to stop repmgrd on all nodes (or at least
those nodes which repmgrd would consider as promotion candidates), however
this is a cumbersome and potentially risk-prone operation, particularly if the
replication cluster contains more than a couple of servers.
To prevent this issue from occurring, this patch introduces the ability
to "pause" repmgrd on all nodes wth a single command ("repmgr daemon pause")
which notifies repmgrd not to take any failover action until the node
is "unpaused" ("repmgr daemon unpause").
"repmgr daemon status" provides an overview of each node and whether repmgrd
is running, and if so whether it is paused.
"repmgr standby switchover" has been modified to automatically pause repmgrd
while carrying out the switchover.
See documentation for further details.
Previously query texts were always logged at log level DEBUG, but
that doesn't help much in a normal production environment when
trying to identify the cause of issues.
Also make various other minor improvements to query logging and
handling of database errors.
Implements GitHub #498.
If any issues are detected (e.g. node not reachable, unexpected node status
etc.), "repmgr cluster show" returns exit code 25 ("ERR_NODE_STATUS").
Note that exit code 25 was introduced recently as "ERR_CLUSTER_CHECK",
however it makes sense to use this to indicate issues detected by any
command which can detect node issues.
Addresses GitHub #456.
This ensures any connection errors are displayed by default in a
comprehensible, easily reportable way, and saves having to request/filter
DEBUG output.
Implements GitHub #369.
In particular, if running "repmgr cluster show" against a database
without the repmgr metadata, showing the error (rather than just
"no records found" etc.) will provide some clues about the problem.
There are now too many options to sensibly fit into general --help
output; we'll add separate output for each repmgr command, e.g.
"repmgr node --help".
If the current primary (demotion candidate) still has any files to archive,
it will delay the shutdown until all files are archived. If there is a
substantial number of files, and/or the archive command executes slowly,
this will probably lead to an unwelcome delay in the switchover process.
