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Provisionally add view "repmgr.replication_status"

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This commit is contained in:
Ian Barwick
2017-08-24 12:58:36 +09:00
parent a659132ea4
commit a127e8face
3 changed files with 90 additions and 26 deletions
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34
repmgr--4.0.sql
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@@ -1,7 +1,7 @@
-- complain if script is sourced in psql, rather than via CREATE EXTENSION
\echo Use "CREATE EXTENSION repmgr" to load this file. \quit
CREATE TABLE nodes (
CREATE TABLE repmgr.nodes (
node_id INTEGER PRIMARY KEY,
upstream_node_id INTEGER NULL REFERENCES nodes (node_id) DEFERRABLE,
active BOOLEAN NOT NULL DEFAULT TRUE,
@@ -15,7 +15,7 @@ CREATE TABLE nodes (
config_file TEXT NOT NULL
);
CREATE TABLE events (
CREATE TABLE repmgr.events (
node_id INTEGER NOT NULL,
event TEXT NOT NULL,
successful BOOLEAN NOT NULL DEFAULT TRUE,
@@ -23,7 +23,7 @@ CREATE TABLE events (
details TEXT NULL
);
CREATE TABLE monitoring_history (
CREATE TABLE repmgr.monitoring_history (
primary_node_id INTEGER NOT NULL,
standby_node_id INTEGER NOT NULL,
last_monitor_time TIMESTAMP WITH TIME ZONE NOT NULL,
@@ -34,9 +34,9 @@ CREATE TABLE monitoring_history (
apply_lag BIGINT NOT NULL
);
CREATE INDEX idx_monitoring_history_time
ON monitoring_history (last_monitor_time, standby_node_id);
ON repmgr.monitoring_history (last_monitor_time, standby_node_id);
CREATE VIEW show_nodes AS
CREATE VIEW repmgr.show_nodes AS
SELECT n.node_id,
n.node_name,
n.active,
@@ -45,10 +45,30 @@ CREATE VIEW show_nodes AS
n.type,
n.priority,
n.conninfo
FROM nodes n
LEFT JOIN nodes un
FROM repmgr.nodes n
LEFT JOIN repmgr.nodes un
ON un.node_id = n.upstream_node_id;
-- repmgr.repmgr_get_last_updated()
CREATE VIEW repmgr.replication_status AS
SELECT m.primary_node_id, m.standby_node_id, n.node_name AS standby_name,
n.type AS node_type, n.active, last_monitor_time,
CASE WHEN n.type='standby' THEN m.last_wal_primary_location ELSE NULL END AS last_wal_primary_location,
m.last_wal_standby_location,
CASE WHEN n.type='standby' THEN pg_catalog.pg_size_pretty(m.replication_lag) ELSE NULL END AS replication_lag,
CASE WHEN n.type='standby' THEN
CASE WHEN replication_lag > 0 THEN age(now(), m.last_apply_time) ELSE '0'::INTERVAL END
ELSE NULL
END AS replication_time_lag,
CASE WHEN n.type='standby' THEN pg_catalog.pg_size_pretty(m.apply_lag) ELSE NULL END AS apply_lag,
AGE(NOW(), CASE WHEN pg_catalog.pg_is_in_recovery() THEN NOW() ELSE m.last_monitor_time END) AS communication_time_lag
FROM repmgr.monitoring_history m
JOIN repmgr.nodes n ON m.standby_node_id = n.node_id
WHERE (m.standby_node_id, m.last_monitor_time) IN (
SELECT m1.standby_node_id, MAX(m1.last_monitor_time)
FROM repmgr.monitoring_history m1 GROUP BY 1
);
/* repmgrd functions */
CREATE FUNCTION request_vote(INT,INT)