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node rewind: add check for pg_rewind and --dry-run mode

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Addresses GitHub #330
This commit is contained in:
Ian Barwick
2017-10-20 14:15:23 +09:00
parent a35d77b7f0
commit 61f01f8305
1 changed files with 49 additions and 0 deletions
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49
repmgr-action-node.c
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@@ -1676,6 +1676,45 @@ do_node_rejoin(void)
exit(ERR_BAD_CONFIG);
}
/*
* If --force-rewind specified, check pg_rewind can be used, and
* pre-emptively fetch the list of configuration files which should be
* archived
*/
if (runtime_options.force_rewind == true)
{
PQExpBufferData reason;
PQExpBufferData msg;
initPQExpBuffer(&reason);
if (can_use_pg_rewind(upstream_conn, config_file_options.data_directory, &reason) == false)
{
log_error(_("--force-rewind specified but pg_rewind cannot be used"));
log_detail("%s", reason.data);
termPQExpBuffer(&reason);
PQfinish(upstream_conn);
exit(ERR_BAD_CONFIG);
}
termPQExpBuffer(&reason);
initPQExpBuffer(&msg);
appendPQExpBuffer(&msg,
_("prerequisites for using pg_rewind are met"));
if (runtime_options.dry_run == true)
{
log_info("%s", msg.data);
}
else
{
log_verbose(LOG_INFO, "%s", msg.data);
}
termPQExpBuffer(&msg);
}
/*
* Forcibly rewind node if requested (this is mainly for use when this
* action is being executed by "repmgr standby switchover")
@@ -1704,6 +1743,16 @@ do_node_rejoin(void)
" --source-server='%s'",
primary_node_record.conninfo);
if (runtime_options.dry_run == true)
{
log_info(_("pg_rewind would now be executed"));
log_detail(_("pg_rewind command is:\n %s"),
command.data);
PQfinish(upstream_conn);
exit(SUCCESS);
}
log_notice(_("executing pg_rewind"));
log_debug("pg_rewind command is:\n %s",
command.data);