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https://github.com/EnterpriseDB/repmgr.git
synced 2026-03-22 22:56:29 +00:00
repmgr: improve "repmgr standby switchover" log output
Particularly in --dry-run mode it's useful to get a confirmation that various prerequisites are met.
This commit is contained in:
Ian Barwick
@@ -1785,6 +1785,27 @@ do_standby_switchover(void)
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exit(ERR_BAD_CONFIG);
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}
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else
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{
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PQExpBufferData msg;
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initPQExpBuffer(&msg);
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appendPQExpBuffer(&msg,
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_("SSH connection to host \"%s\" succeeded"),
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remote_host);
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if (runtime_options.dry_run == true)
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{
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log_info("%s", msg.data);
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}
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else
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{
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log_verbose(LOG_INFO, "%s", msg.data);
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}
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termPQExpBuffer(&msg);
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}
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/* check archive/replication status */
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{
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@@ -1822,58 +1843,103 @@ do_standby_switchover(void)
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}
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termPQExpBuffer(&command_output);
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if (status == CHECK_STATUS_UNKNOWN)
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{
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if (runtime_options.force == false)
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{
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log_error(_("unable to check number of pending archive files on demotion candidate \"%s\""),
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remote_node_record.node_name);
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log_hint(_("use -F/--force to continue anyway"));
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PQfinish(remote_conn);
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PQfinish(local_conn);
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exit(ERR_SWITCHOVER_FAIL);
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switch (status)
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{
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case CHECK_STATUS_UNKNOWN:
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{
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if (runtime_options.force == false)
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{
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log_error(_("unable to check number of pending archive files on demotion candidate \"%s\""),
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remote_node_record.node_name);
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log_hint(_("use -F/--force to continue anyway"));
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PQfinish(remote_conn);
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PQfinish(local_conn);
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exit(ERR_SWITCHOVER_FAIL);
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}
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log_warning(_("unable to check number of pending archive files on demotion candidate \"%s\""),
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remote_node_record.node_name);
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log_notice(_("-F/--force set, continuing with switchover"));
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}
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break;
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log_warning(_("unable to check number of pending archive files on demotion candidate \"%s\""),
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remote_node_record.node_name);
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log_notice(_("-F/--force set, continuing with switchover"));
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}
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else if (status == CHECK_STATUS_CRITICAL)
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{
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if (runtime_options.force == false)
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case CHECK_STATUS_CRITICAL:
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{
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log_error(_("number of pending archive files on demotion candidate \"%s\" is critical"),
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remote_node_record.node_name);
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if (runtime_options.force == false)
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{
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log_error(_("number of pending archive files on demotion candidate \"%s\" is critical"),
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remote_node_record.node_name);
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log_detail(_("%i pending archive files (critical threshold: %i)"),
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files, threshold);
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log_hint(_("PostgreSQL will not shut down until all files are archived; use -F/--force to continue anyway"));
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PQfinish(remote_conn);
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PQfinish(local_conn);
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exit(ERR_SWITCHOVER_FAIL);
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}
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log_warning(_("number of pending archive files on demotion candidate \"%s\" is critical"),
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remote_node_record.node_name);
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log_detail(_("%i pending archive files (critical threshold: %i)"),
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files, threshold);
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log_hint(_("PostgreSQL will not shut down until all files are archived; use -F/--force to continue anyway"));
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PQfinish(remote_conn);
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PQfinish(local_conn);
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exit(ERR_SWITCHOVER_FAIL);
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log_notice(_("-F/--force set, continuing with switchover"));
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}
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break;
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log_warning(_("number of pending archive files on demotion candidate \"%s\" is critical"),
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remote_node_record.node_name);
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log_detail(_("%i pending archive files (critical threshold: %i)"),
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files, threshold);
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log_notice(_("-F/--force set, continuing with switchover"));
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}
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else if (status == CHECK_STATUS_WARNING)
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{
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log_warning(_("number of pending archive files on demotion candidate \"%s\" is warning"),
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remote_node_record.node_name);
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log_detail(_("%i pending archive files (warning threshold: %i)"),
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files, threshold);
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log_hint(_("PostgreSQL will not shut down until all files are archived"));
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case CHECK_STATUS_WARNING:
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{
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log_warning(_("number of pending archive files on demotion candidate \"%s\" is warning"),
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remote_node_record.node_name);
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log_detail(_("%i pending archive files (warning threshold: %i)"),
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files, threshold);
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log_hint(_("PostgreSQL will not shut down until all files are archived"));
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}
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break;
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case CHECK_STATUS_OK:
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{
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PQExpBufferData msg;
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initPQExpBuffer(&msg);
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appendPQExpBuffer(&msg,
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_("%i pending archive files"),
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files);
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if (runtime_options.dry_run == true)
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{
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log_info("%s", msg.data);
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}
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else
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{
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log_verbose(LOG_INFO, "%s", msg.data);
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}
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termPQExpBuffer(&msg);
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}
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}
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}
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else
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{
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char *msg = _("archive mode is \"off\"");
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/* check replication lag */
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lag_seconds = get_replication_lag_seconds(local_conn);
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if (runtime_options.dry_run == true)
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{
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log_info("%s", msg);
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}
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else
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{
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log_verbose(LOG_INFO, "%s", msg);
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}
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}
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/*
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* check replication lag on promotion candidate
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* (TODO: check on all nodes attached to demotion candidate)
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*/
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lag_seconds = get_replication_lag_seconds(local_conn);
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log_debug("lag is %i ", lag_seconds);
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@@ -1919,6 +1985,27 @@ do_standby_switchover(void)
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log_warning(_("unable to check replication lag on local node"));
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log_notice(_("-F/--force set, continuing with switchover"));
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}
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/* replication lag is below warning threshold */
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else
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{
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PQExpBufferData msg;
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initPQExpBuffer(&msg);
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appendPQExpBuffer(&msg,
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_("replication lag on this standby is %i seconds"),
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lag_seconds);
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if (runtime_options.dry_run == true)
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{
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log_info("%s", msg.data);
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}
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else
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{
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log_verbose(LOG_INFO, "%s", msg.data);
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}
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termPQExpBuffer(&msg);
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}
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}
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PQfinish(remote_conn);
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@@ -1927,70 +2014,97 @@ do_standby_switchover(void)
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/*
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* If --siblings-follow specified, get list and check they're reachable
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*/
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get_active_sibling_node_records(local_conn,
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local_node_record.node_id,
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local_node_record.upstream_node_id,
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&sibling_nodes);
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if (runtime_options.siblings_follow == true)
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if (runtime_options.siblings_follow == false)
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{
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if (sibling_nodes.node_count > 0)
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{
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log_warning(_("%i sibling nodes found, but option \"--siblings-follow\" not specified"),
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sibling_nodes.node_count);
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log_detail(_("these nodes will remain attached to the current primary"));
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}
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}
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else
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{
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char host[MAXLEN] = "";
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NodeInfoListCell *cell;
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get_active_sibling_node_records(local_conn,
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local_node_record.node_id,
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local_node_record.upstream_node_id,
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&sibling_nodes);
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log_verbose(LOG_INFO, _("%i active sibling nodes found"),
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sibling_nodes.node_count);
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for (cell = sibling_nodes.head; cell; cell = cell->next)
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if (sibling_nodes.node_count == 0)
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{
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/* get host from node record */
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get_conninfo_value(cell->node_info->conninfo, "host", host);
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r = test_ssh_connection(host, runtime_options.remote_user);
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if (r != 0)
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{
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cell->node_info->reachable = false;
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unreachable_sibling_node_count++;
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}
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else
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{
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cell->node_info->reachable = true;
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}
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log_warning(_("option \"--sibling-nodes\" specified, but no sibling nodes exist"));
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}
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if (unreachable_sibling_node_count > 0)
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else
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{
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if (runtime_options.force == false)
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{
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log_error(_("%i of %i sibling nodes unreachable via SSH:"),
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unreachable_sibling_node_count,
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sibling_nodes.node_count);
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}
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else
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{
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log_warning(_("%i of %i sibling nodes unreachable via SSH:"),
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unreachable_sibling_node_count,
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sibling_nodes.node_count);
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}
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for (cell = sibling_nodes.head; cell; cell = cell->next)
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{
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if (cell->node_info->reachable == true)
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continue;
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log_detail(" %s (ID: %i)",
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cell->node_info->node_name,
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cell->node_info->node_id);
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/* get host from node record */
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get_conninfo_value(cell->node_info->conninfo, "host", host);
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r = test_ssh_connection(host, runtime_options.remote_user);
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if (r != 0)
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{
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cell->node_info->reachable = false;
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unreachable_sibling_node_count++;
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}
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else
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{
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cell->node_info->reachable = true;
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}
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}
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if (runtime_options.force == false)
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if (unreachable_sibling_node_count > 0)
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{
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log_hint(_("use -F/--force to proceed in any case"));
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PQfinish(local_conn);
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exit(ERR_BAD_CONFIG);
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if (runtime_options.force == false)
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{
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log_error(_("%i of %i sibling nodes unreachable via SSH:"),
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unreachable_sibling_node_count,
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sibling_nodes.node_count);
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}
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else
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{
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log_warning(_("%i of %i sibling nodes unreachable via SSH:"),
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unreachable_sibling_node_count,
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sibling_nodes.node_count);
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}
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for (cell = sibling_nodes.head; cell; cell = cell->next)
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{
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if (cell->node_info->reachable == true)
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continue;
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log_detail(" %s (ID: %i)",
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cell->node_info->node_name,
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cell->node_info->node_id);
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}
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if (runtime_options.force == false)
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{
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log_hint(_("use -F/--force to proceed in any case"));
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PQfinish(local_conn);
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exit(ERR_BAD_CONFIG);
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}
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log_detail(_("F/--force specified, proceeding anyway"));
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}
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else
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{
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char *msg = _("all sibling nodes are reachable via SSH");
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log_detail(_("F/--force specified, proceeding anyway"));
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if (runtime_options.dry_run == true)
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{
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log_info("%s", msg);
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}
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else
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{
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log_verbose(LOG_INFO, "%s", msg);
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}
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}
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}
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}
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PQfinish(local_conn);
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@@ -2000,7 +2114,7 @@ do_standby_switchover(void)
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* Sanity checks completed - prepare for the switchover
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*/
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log_detail(_("local node \"%s\" (ID: %i) will be promoted to primary; "
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log_notice(_("local node \"%s\" (ID: %i) will be promoted to primary; "
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"current primary \"%s\" (ID: %i) will be demoted to standby"),
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local_node_record.node_name,
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local_node_record.node_id,
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