Add "repmgr node status"

Outputs an overview of a node's status, and emits warnings if any issues detected.
2026-03-22 22:56:29 +00:00 · 2017-07-25 00:12:16 +09:00
parent 93c35618a2
commit 8a2e4db1bc
8 changed files with 290 additions and 11 deletions
--- a/repmgr-action-node.c
+++ b/repmgr-action-node.c
@@ -0,0 +1,184 @@
+/*
+ * repmgr-action-node.c
+ *
+ * Implements actions available for any kind of node
+ *
+ * Copyright (c) 2ndQuadrant, 2010-2017
+ */
+
+
+#include "repmgr.h"
+
+#include "repmgr-client-global.h"
+#include "repmgr-action-node.h"
+
+void
+do_node_status(void)
+{
+	PGconn	   	   *conn;
+
+	int 			target_node_id = UNKNOWN_NODE_ID;
+	t_node_info 	node_info = T_NODE_INFO_INITIALIZER;
+	char			server_version[MAXLEN];
+	char			cluster_size[MAXLEN];
+	PQExpBufferData	output;
+
+	ItemList 		warnings = { NULL, NULL };
+	RecoveryType	recovery_type;
+
+	if (strlen(config_file_options.conninfo))
+		conn = establish_db_connection(config_file_options.conninfo, true);
+	else
+		conn = establish_db_connection_by_params(&source_conninfo, true);
+
+	if (runtime_options.node_id != UNKNOWN_NODE_ID)
+		target_node_id = runtime_options.node_id;
+	else
+		target_node_id = config_file_options.node_id;
+
+	/* Check node exists and is really a standby */
+
+	if (get_node_record(conn, target_node_id, &node_info) != RECORD_FOUND)
+	{
+		log_error(_("no record found for node %i"), target_node_id);
+		PQfinish(conn);
+		exit(ERR_BAD_CONFIG);
+	}
+	(void) get_server_version(conn, server_version);
+
+	if (get_cluster_size(conn, cluster_size) == false)
+		strncpy(cluster_size, _("unknown"), MAXLEN);
+
+	recovery_type = get_recovery_type(conn);
+
+	get_node_replication_stats(conn, &node_info);
+
+	initPQExpBuffer(&output);
+
+	appendPQExpBuffer(
+		&output,
+		"Node \"%s\":\n",
+		node_info.node_name);
+
+	appendPQExpBuffer(
+		&output,
+		"%cPostgreSQL version: %s\n",
+		'\t', server_version);
+
+	appendPQExpBuffer(
+		&output,
+		"%cTotal data size: %s\n",
+		'\t', cluster_size);
+
+	appendPQExpBuffer(
+		&output,
+		"%cConninfo: \"%s\"\n",
+		'\t', node_info.conninfo);
+
+	appendPQExpBuffer(
+		&output,
+		"%cRole: \"%s\"\n",
+		'\t', get_node_type_string(node_info.type));
+
+	switch (node_info.type)
+	{
+		case PRIMARY:
+			if (recovery_type == RECTYPE_STANDBY)
+			{
+				item_list_append(
+					&warnings,
+					_("- node is registered as primary but running as standby"));
+			}
+			break;
+		case STANDBY:
+			if (recovery_type == RECTYPE_PRIMARY)
+			{
+				item_list_append(
+					&warnings,
+					_("- node is registered as standby but running as primary"));
+			}
+			break;
+		case BDR:
+		default:
+			break;
+	}
+
+
+	if (node_info.max_wal_senders >= 0)
+	{
+		appendPQExpBuffer(
+			&output,
+			"%cReplication connections: %i (of maximal %i)\n",
+			'\t',
+			node_info.attached_wal_receivers,
+			node_info.max_wal_senders);
+
+	}
+	else if (node_info.max_wal_senders == 0)
+	{
+		appendPQExpBuffer(
+			&output,
+			"%cReplication connections: disabled\n",
+			'\t');
+	}
+
+	if (node_info.max_replication_slots > 0)
+	{
+		appendPQExpBuffer(
+			&output,
+			"%cReplication slots: %i (of maximal %i)",
+			'\t',
+			node_info.active_replication_slots + node_info.inactive_replication_slots,
+			node_info.max_replication_slots);
+
+		if (node_info.inactive_replication_slots > 0)
+		{
+			appendPQExpBuffer(
+				&output,
+				"; %i inactive",
+				node_info.inactive_replication_slots);
+
+			item_list_append_format(
+				&warnings,
+				_("- node has %i inactive replication slots"),
+				node_info.inactive_replication_slots);
+		}
+	}
+	else if (node_info.max_replication_slots == 0)
+	{
+		appendPQExpBuffer(
+			&output,
+			"%cReplication slots: disabled\n",
+			'\t');
+	}
+
+/*
+	appendPQExpBuffer(
+		&output,
+		"%c: \"%s\"\n",
+		'\t', );
+	appendPQExpBuffer(
+		&output,
+		"%c: \"%s\"\n",
+		'\t', node_info.);
+*/
+
+
+	puts(output.data);
+
+	termPQExpBuffer(&output);
+
+	if (warnings.head != NULL && runtime_options.terse == false)
+	{
+		log_warning(_("following issue(s) were detected:"));
+		print_item_list(&warnings);
+		log_hint(_("execute \"repmgr node check\" for more details"));
+	}
+
+}
+
+
+void
+do_node_check(void)
+{
+}