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Check replication lag before attempting switchover

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This commit is contained in:
Ian Barwick
2017-08-08 10:16:47 +09:00
parent fd5dfa2ebc
commit f2cf46bba3
12 changed files with 605 additions and 48 deletions
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256
repmgr-action-node.c
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@@ -395,15 +395,29 @@ do_node_check(void)
PQfinish(conn);
return;
}
if (runtime_options.replication_lag == true)
{
(void) do_node_check_replication_lag(conn, runtime_options.output_mode, NULL);
PQfinish(conn);
return;
}
}
bool
CheckStatus
do_node_check_archiver(PGconn *conn, OutputMode mode, PQExpBufferData *output)
{
bool own_buffer = false;
int ready_archive_files = 0;
PQExpBufferData buf;
bool check_ok = true;
CheckStatus status = CHECK_STATUS_UNKNOWN;
if (mode == OM_CSV)
{
log_error(_("--csv output not provided with --archiver option"));
exit(ERR_BAD_CONFIG);
}
if (output == NULL)
{
@@ -412,10 +426,13 @@ do_node_check_archiver(PGconn *conn, OutputMode mode, PQExpBufferData *output)
own_buffer = true;
}
ready_archive_files = get_ready_archive_files(conn, config_file_options.data_directory);
if (ready_archive_files > config_file_options.archiver_lag_critical)
{
status = CHECK_STATUS_CRITICAL;
switch (mode)
{
case OM_OPTFORMAT:
@@ -425,12 +442,29 @@ do_node_check_archiver(PGconn *conn, OutputMode mode, PQExpBufferData *output)
ready_archive_files,
config_file_options.archiver_lag_critical);
break;
case OM_NAGIOS:
appendPQExpBuffer(
output,
"PG_ARCHIVER CRITICAL: %i pending files (critical: %i)",
ready_archive_files,
config_file_options.archiver_lag_critical);
break;
case OM_TEXT:
appendPQExpBuffer(
output,
"CRITICAL - %i pending files (threshold: %i)",
ready_archive_files,
config_file_options.archiver_lag_critical);
break;
default:
break;
}
}
else if (ready_archive_files > config_file_options.archiver_lag_warning)
{
status = CHECK_STATUS_WARNING;
switch (mode)
{
case OM_OPTFORMAT:
@@ -440,12 +474,55 @@ do_node_check_archiver(PGconn *conn, OutputMode mode, PQExpBufferData *output)
ready_archive_files,
config_file_options.archiver_lag_warning);
break;
case OM_NAGIOS:
appendPQExpBuffer(
output,
"PG_ARCHIVER WARNING: %i pending files (warning: %i)",
ready_archive_files,
config_file_options.archiver_lag_warning);
break;
case OM_TEXT:
appendPQExpBuffer(
output,
"WARNING - %i pending files (threshold: %i)",
ready_archive_files,
config_file_options.archiver_lag_warning);
break;
default:
break;
}
}
else if (ready_archive_files < 0)
{
status = CHECK_STATUS_UNKNOWN;
switch (mode)
{
case OM_OPTFORMAT:
appendPQExpBuffer(
output,
"--status=UNKNOWN");
break;
case OM_NAGIOS:
appendPQExpBuffer(
output,
"PG_ARCHIVER UNKNOWN: unable to check archive_status directory");
break;
case OM_TEXT:
appendPQExpBuffer(
output,
"UNKNOWN - unable to check archive_status directory");
break;
default:
break;
}
}
else
{
status = CHECK_STATUS_OK;
switch (mode)
{
case OM_OPTFORMAT:
@@ -454,19 +531,192 @@ do_node_check_archiver(PGconn *conn, OutputMode mode, PQExpBufferData *output)
"--status=OK --files=%i",
ready_archive_files);
break;
case OM_NAGIOS:
appendPQExpBuffer(
output,
"PG_ARCHIVER OK: %i pending files",
ready_archive_files);
break;
case OM_TEXT:
appendPQExpBuffer(
output,
"OK - %i pending files",
ready_archive_files);
break;
default:
break;
}
}
if (own_buffer == true)
{
printf("%s\n", buf.data);
termPQExpBuffer(&buf);
}
return check_ok;
return status;
}
CheckStatus
do_node_check_replication_lag(PGconn *conn, OutputMode mode, PQExpBufferData *output)
{
CheckStatus status = CHECK_STATUS_UNKNOWN;
bool own_buffer = false;
PQExpBufferData buf;
int lag_seconds;
if (mode == OM_CSV)
{
log_error(_("--csv output not provided with --replication-lag option"));
exit(ERR_BAD_CONFIG);
}
if (output == NULL)
{
initPQExpBuffer(&buf);
output = &buf;
own_buffer = true;
}
lag_seconds = get_replication_lag_seconds(conn);
log_debug("lag seconds: %i", lag_seconds);
if (lag_seconds >= config_file_options.replication_lag_critical)
{
status = CHECK_STATUS_CRITICAL;
switch (mode)
{
case OM_OPTFORMAT:
appendPQExpBuffer(
output,
"--status=CRITICAL --lag=%i --threshold=%i",
lag_seconds,
config_file_options.replication_lag_critical);
break;
case OM_NAGIOS:
appendPQExpBuffer(
output,
"PG_REPLICATION_LAG CRITICAL: %i seconds (critical: %i)",
lag_seconds,
config_file_options.replication_lag_critical);
break;
case OM_TEXT:
appendPQExpBuffer(
output,
"CRITICAL - %i seconds (threshold: %i)",
lag_seconds,
config_file_options.replication_lag_critical);
break;
default:
break;
}
}
else if (lag_seconds > config_file_options.replication_lag_warning)
{
status = CHECK_STATUS_WARNING;
switch (mode)
{
case OM_OPTFORMAT:
appendPQExpBuffer(
output,
"--status=WARNING --lag=%i --threshold=%i",
lag_seconds,
config_file_options.replication_lag_warning);
break;
case OM_NAGIOS:
appendPQExpBuffer(
output,
"PG_REPLICATION_LAG WARNING: %i seconds (warning: %i)",
lag_seconds,
config_file_options.replication_lag_warning);
break;
case OM_TEXT:
appendPQExpBuffer(
output,
"WARNING - %i seconds (threshold: %i)",
lag_seconds,
config_file_options.replication_lag_warning);
break;
default:
break;
}
}
else if (lag_seconds < 0)
{
status = CHECK_STATUS_UNKNOWN;
switch (mode)
{
case OM_OPTFORMAT:
appendPQExpBuffer(
output,
"--status=UNKNOWN");
break;
case OM_NAGIOS:
appendPQExpBuffer(
output,
"PG_REPLICATION_LAG UNKNOWN: unable to query replication lag");
break;
case OM_TEXT:
appendPQExpBuffer(
output,
"UNKNOWN - unable to query replication lag");
break;
default:
break;
}
}
else
{
status = CHECK_STATUS_OK;
switch (mode)
{
case OM_OPTFORMAT:
appendPQExpBuffer(
output,
"--status=OK --files=%i",
lag_seconds);
break;
case OM_NAGIOS:
appendPQExpBuffer(
output,
"PG_REPLICATION_LAG OK: %i seconds",
lag_seconds);
break;
case OM_TEXT:
appendPQExpBuffer(
output,
"OK - %i seconds",
lag_seconds);
break;
default:
break;
}
}
if (own_buffer == true)
{
printf("%s\n", buf.data);
termPQExpBuffer(&buf);
}
return status;
}
// --action=...
// --check
// --list -> list what would be executed for each action, filter to --action