when repmgr_funcs is not pre-loaded `repmgr_update_standby_location()`
will return false and `repmgr_get_last_standby_location()` will return
an empty string. Thus we may end in an endless loop. To avoid that we fail.
When not flushing and fsync()ing it the output may be garbled due to
concurrent writes to the file (system() spawns a child process with
stdin/stdout/stderr inherited from it's parent)
sleep_monitor replaces the old SLEEP_MONITOR define and makes it
configurable; this is the interval in which we monitor
sleep_delay replaces the old sleep(300) when waiting for the master to
recover.
This option forks the process and generates a new session. This
effectively detaches it from the shell. Don't forget to redirect stderr
or use syslog for logging!
We have to remove our own node before we check for a new master if force
is set; else master register would fail on the second time since there
already is a master (ourselves), even if we specify -F
This could leave the database in a locked state (pg_start_backup()).
And since all calls to create_pgdir() handle the return value correctly
we simply replace the exit() by a return false
Make this by waiting for all nodes to finish a step, before starting
a new one. So everyone starts promoting or following in a coordinated
fashion.
Also make a few fixes.
Specially, make this a more coordinated process by making all
nodes waiting for the others before going to the next step.
This is one step further in following Andres Freund advices
but there is still a lot to do in order to complete that,
specially it could be needed to add more fields to repl_nodes
and to the shm area.
When deciding which node will be the new master, we should get the
nodes in a well defined order otherwise two standbys could process
nodes with the same priority in different order and end up with
a two master situation.
When deciding which node will be the new master, we should get the
nodes in a well defined order otherwise two standbys could process
nodes with the same priority in different order and end up with
a two master situation.
