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node check: add --upstream option

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We have a --downstream option to check for attached nodes, but it
would be useful to have a corresponding --upstream option too.

A following patch will adapt the behaviour of this option when executed
on the primary node.
This commit is contained in:
Ian Barwick
2020-03-30 17:54:24 +09:00
parent f3258c5002
commit d9cb38c7f0
6 changed files with 128 additions and 19 deletions
Download Patch File Download Diff File Expand all files Collapse all files

95
repmgr-action-node.c
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@@ -44,6 +44,7 @@ static void _do_node_restore_config(void);
static void do_node_check_replication_connection(void);
static CheckStatus do_node_check_archive_ready(PGconn *conn, OutputMode mode, CheckStatusList *list_output);
static CheckStatus do_node_check_downstream(PGconn *conn, OutputMode mode, CheckStatusList *list_output);
static CheckStatus do_node_check_upstream(PGconn *conn, OutputMode mode, t_node_info *node_info, CheckStatusList *list_output);
static CheckStatus do_node_check_replication_lag(PGconn *conn, OutputMode mode, t_node_info *node_info, CheckStatusList *list_output);
static CheckStatus do_node_check_role(PGconn *conn, OutputMode mode, t_node_info *node_info, CheckStatusList *list_output);
static CheckStatus do_node_check_slots(PGconn *conn, OutputMode mode, t_node_info *node_info, CheckStatusList *list_output);
@@ -791,6 +792,15 @@ do_node_check(void)
exit(return_code);
}
if (runtime_options.upstream == true)
{
return_code = do_node_check_upstream(conn,
runtime_options.output_mode,
&node_info,
NULL);
PQfinish(conn);
exit(return_code);
}
if (runtime_options.replication_lag == true)
{
@@ -878,6 +888,9 @@ do_node_check(void)
if (do_node_check_downstream(conn, runtime_options.output_mode, &status_list) != CHECK_STATUS_OK)
issue_detected = true;
if (do_node_check_upstream(conn, runtime_options.output_mode, &node_info, &status_list) != CHECK_STATUS_OK)
issue_detected = true;
if (do_node_check_slots(conn, runtime_options.output_mode, &node_info, &status_list) != CHECK_STATUS_OK)
issue_detected = true;
@@ -1336,6 +1349,87 @@ do_node_check_downstream(PGconn *conn, OutputMode mode, CheckStatusList *list_ou
}
static CheckStatus
do_node_check_upstream(PGconn *conn, OutputMode mode, t_node_info *node_info, CheckStatusList *list_output)
{
PGconn *upstream_conn = NULL;
t_node_info upstream_node_info = T_NODE_INFO_INITIALIZER;
PQExpBufferData details;
CheckStatus status = CHECK_STATUS_OK;
if (mode == OM_CSV && list_output == NULL)
{
log_error(_("--csv output not provided with --upstream option"));
PQfinish(conn);
exit(ERR_BAD_CONFIG);
}
if (get_node_record(conn, node_info->upstream_node_id, &upstream_node_info) != RECORD_FOUND)
{
log_error(_("no record found for upstream node %i"), node_info->upstream_node_id);
PQfinish(conn);
exit(ERR_BAD_CONFIG);
}
initPQExpBuffer(&details);
upstream_conn = establish_db_connection(upstream_node_info.conninfo, true);
/* check our node is connected */
if (is_downstream_node_attached(upstream_conn, config_file_options.node_name) != NODE_ATTACHED)
{
appendPQExpBuffer(&details,
_("node \"%s\" (ID: %i) is not attached to expected upstream node \"%s\" (ID: %i)"),
node_info->node_name,
node_info->node_id,
upstream_node_info.node_name,
upstream_node_info.node_id);
status = CHECK_STATUS_CRITICAL;
}
else
{
appendPQExpBuffer(&details,
_("node \"%s\" (ID: %i) is attached to expected upstream node \"%s\" (ID: %i)"),
node_info->node_name,
node_info->node_id,
upstream_node_info.node_name,
upstream_node_info.node_id);
}
switch (mode)
{
case OM_NAGIOS:
{
printf("REPMGR_UPSTREAM_SERVER %s: %s | ",
output_check_status(status),
details.data);
}
case OM_TEXT:
if (list_output != NULL)
{
check_status_list_set(list_output,
"Upstream connection",
status,
details.data);
}
else
{
printf("%s (%s)\n",
output_check_status(status),
details.data);
}
default:
break;
}
termPQExpBuffer(&details);
return status;
}
static CheckStatus
do_node_check_replication_lag(PGconn *conn, OutputMode mode, t_node_info *node_info, CheckStatusList *list_output)
{
@@ -3254,6 +3348,7 @@ do_node_help(void)
printf(_(" Following options check an individual status:\n"));
printf(_(" --archive-ready number of WAL files ready for archiving\n"));
printf(_(" --downstream whether all downstream nodes are connected\n"));
printf(_(" --uptream whether the node is connected to its upstream\n"));
printf(_(" --replication-lag replication lag in seconds (standbys only)\n"));
printf(_(" --role check node has expected role\n"));
printf(_(" --slots check for inactive replication slots\n"));