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https://github.com/EnterpriseDB/repmgr.git
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41ec45a4cc
Currently repmgr assumes the SSH hostname will be the same as the database hostname, and it's easy enough now to extract this from the node's conninfo string. We can consider re-adding this in the next release if required.
71 lines
2.5 KiB
SQL
71 lines
2.5 KiB
SQL
/*
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* repmgr.sql
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*
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* Copyright (C) 2ndQuadrant, 2010-2016
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*
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*/
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CREATE USER repmgr;
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CREATE SCHEMA repmgr;
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/*
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* The table repl_nodes keeps information about all machines in
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* a cluster
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*/
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CREATE TABLE repl_nodes (
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id integer primary key,
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cluster text not null, -- Name to identify the cluster
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name text not null,
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conninfo text not null,
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priority integer not null,
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witness boolean not null default false
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);
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ALTER TABLE repl_nodes OWNER TO repmgr;
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/*
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* Keeps monitor info about every node and their relative "position"
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* to primary
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*/
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CREATE TABLE repl_monitor (
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primary_node INTEGER NOT NULL,
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standby_node INTEGER NOT NULL,
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last_monitor_time TIMESTAMP WITH TIME ZONE NOT NULL,
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last_wal_primary_location TEXT NOT NULL,
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last_wal_standby_location TEXT, -- In case of a witness server this will be NULL
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replication_lag BIGINT NOT NULL,
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apply_lag BIGINT NOT NULL
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);
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ALTER TABLE repl_monitor OWNER TO repmgr;
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/*
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* This view shows the latest monitor info about every node.
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* Interesting thing to see:
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* replication_lag: in bytes (this is how far the latest xlog record
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* we have received is from master)
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* apply_lag: in bytes (this is how far the latest xlog record
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* we have applied is from the latest record we
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* have received)
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* time_lag: how many seconds are we from being up-to-date with master
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*/
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CREATE VIEW repl_status AS
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SELECT primary_node, standby_node, name AS standby_name, last_monitor_time, last_wal_primary_location,
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last_wal_standby_location, pg_size_pretty(replication_lag) replication_lag,
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pg_size_pretty(apply_lag) apply_lag,
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age(now(), last_monitor_time) AS time_lag
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FROM repl_monitor JOIN repl_nodes ON standby_node = id
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WHERE (standby_node, last_monitor_time) IN (SELECT standby_node, MAX(last_monitor_time)
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FROM repl_monitor GROUP BY 1);
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ALTER VIEW repl_status OWNER TO repmgr;
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CREATE INDEX idx_repl_status_sort ON repl_monitor(last_monitor_time, standby_node);
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/*
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* This view shows the list of nodes with the information of which one is the upstream
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* in each case (when appliable)
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*/
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CREATE VIEW repl_show_nodes AS
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SELECT rn.id, rn.conninfo, rn.type, rn.name, rn.cluster,
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rn.priority, rn.active, sq.name AS upstream_node_name
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FROM repl_nodes as rn LEFT JOIN repl_nodes AS sq ON sq.id=rn.upstream_node_id;
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