Previously repmgr would first check that a replication can be made
from the demotion candidate to the promotion candidate, however it's
preferable to sanity-check the number of available walsenders first,
to provide a more useful error message.
The unqualified wording previously implied that any running server could
be rejoined with "standby follow", which is not the case with a
"split brain" primary.
Avoid copying files during a --dry-run as it may introduce unexpected changes
on the target node. During an actual clone operation, any problems with
copying files will be detected early and the operation aborted before
the actual database cloning commences.
GitHub #491.
Basically any setting which can contain a user-defined script
*must* have the full path set, even if it's repmgr being executed.
We could potentially apply some heuristics to detect if the first
item in the setting is "repmgr" (or more precisely repmgrd's program
name), but this will require some careful thought and testing
that it works as intended.
In the sample logrotate configuration file, use "copytruncate" rather than "create",
as repmgrd currently doesn't reopen the log file (unless the configuration changes).
Per suggestion in GitHub #465.
The documentation implied it would override "promote_command", which is
not the case.
"promote_command" is used by repmgrd to execute "repmgr standby promote"
(either directly or via a custom script).
"service_promote_command" can be set to specify a package-level service
command to promote the local PostgreSQL instance from standby to primary,
e.g. Debian's pg_ctlcluster. If set, this will be executed by "repmgr standby promote".
Also update code comments to clarify usage.
Related to GitHub #473.
This suppresses log output below log level ERROR. This is useful mainly
when repmgr is being executed programmatically, e.g. in a cronjob,
where it's only useful to receive output if something goes wrong.
Note we advise against using this option when executing repmgr
commands which operate on PostgreSQL nodes (standby follow,
standby promote, standby switchover, node rejoin), particularly when
executed by repmgrd, as the log output will provide valuable
troubleshooting information.
Implements suggestion in GitHub #468.
Default was previously NOTICE (as in repmgr 3.x) but documentation
implied it was INFO, and many of the the documentation examples assume
it is.
This produces some quite informative log output, without creating excessive
log file volume. In particular it's useful to get a better idea of what
repmgrd is actually doing.
Also add documentation section for the log configuration parameters.
GitHub #470, containing change suggested in GitHub #467.
