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Add "repmgr node check --downstream"

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This commit is contained in:
Ian Barwick
2017-08-15 15:50:46 +09:00
parent 10ef30096c
commit 554673e83e
8 changed files with 169 additions and 11 deletions
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106
repmgr-action-node.c
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@@ -32,6 +32,7 @@ static void _do_node_restore_config(void);
static CheckStatus do_node_check_role(PGconn *conn, OutputMode mode, t_node_info *node_info, CheckStatusList *list_output);
static CheckStatus do_node_check_archiver(PGconn *conn, OutputMode mode, CheckStatusList *list_output);
static CheckStatus do_node_check_replication_lag(PGconn *conn, OutputMode mode, CheckStatusList *list_output);
static CheckStatus do_node_check_downstream(PGconn *conn, OutputMode mode, CheckStatusList *list_output);
void
@@ -558,6 +559,12 @@ do_node_check(void)
return;
}
if (runtime_options.downstream == true)
{
(void) do_node_check_downstream(conn, runtime_options.output_mode, NULL);
PQfinish(conn);
return;
}
/* output general overview */
initPQExpBuffer(&output);
@@ -565,7 +572,7 @@ do_node_check(void)
(void) do_node_check_role(conn, runtime_options.output_mode, &node_info, &status_list);
(void) do_node_check_replication_lag(conn, runtime_options.output_mode, &status_list);
(void) do_node_check_archiver(conn, runtime_options.output_mode, &status_list);
(void) do_node_check_downstream(conn, runtime_options.output_mode, &status_list);
if (runtime_options.output_mode == OM_CSV)
{
@@ -1016,6 +1023,103 @@ do_node_check_replication_lag(PGconn *conn, OutputMode mode, CheckStatusList *li
return status;
}
/* TODO: ensure only runs on streaming replication nodes */
static CheckStatus
do_node_check_downstream(PGconn *conn, OutputMode mode, CheckStatusList *list_output)
{
NodeInfoList downstream_nodes = T_NODE_INFO_LIST_INITIALIZER;
NodeInfoListCell *cell = NULL;
int missing_nodes_count = 0;
CheckStatus status = CHECK_STATUS_OK;
ItemList missing_nodes = { NULL, NULL };
PQExpBufferData details;
initPQExpBuffer(&details);
get_downstream_node_records(conn, config_file_options.node_id, &downstream_nodes);
for (cell = downstream_nodes.head; cell; cell = cell->next)
{
if (is_downstream_node_attached(conn, cell->node_info->node_name) == false)
{
missing_nodes_count ++;
item_list_append_format(&missing_nodes,
"%s (ID: %i)",
cell->node_info->node_name,
cell->node_info->node_id);
}
}
if (missing_nodes_count == 0)
{
if (downstream_nodes.node_count == 0)
appendPQExpBuffer(
&details,
"this node has no downstream nodes");
else
appendPQExpBuffer(
&details,
"%i of %i downstream nodes attached",
downstream_nodes.node_count,
downstream_nodes.node_count);
}
else
{
ItemListCell *missing_cell = NULL;
bool first = true;
status = CHECK_STATUS_CRITICAL;
appendPQExpBuffer(
&details,
"%i of %i downstream nodes not attached (missing: ",
missing_nodes_count,
downstream_nodes.node_count);
for (missing_cell = missing_nodes.head; missing_cell; missing_cell = missing_cell->next)
{
if (first == false)
appendPQExpBuffer(
&details,
",");
else
first = false;
if (first == false)
appendPQExpBuffer(
&details,
"%s", missing_cell->string);
}
}
switch (mode)
{
case OM_NAGIOS:
printf("PG_DOWNSTREAM_SERVERS %s: %s\n",
output_check_status(status),
details.data);
break;
case OM_TEXT:
if (list_output != NULL)
{
check_status_list_set(list_output,
"Downstream servers",
status,
details.data);
}
else
{
printf("%s (%s)\n",
output_check_status(status),
details.data);
}
default:
break;
}
termPQExpBuffer(&details);
return status;
}
// --action=...
// --check