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100 lines
2.1 KiB
Bash
Executable File
100 lines
2.1 KiB
Bash
Executable File
#!/bin/sh -eu
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# This is a simple example of wsrep notification script (wsrep_notify_cmd).
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# It will create 'wsrep' schema and two tables in it: 'membeship' and 'status'
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# and fill them on every membership or node status change.
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#
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# Edit parameters below to specify the address and login to server.
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USER=root
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HOST=127.0.0.1
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PORT=$NODE_MYPORT_1
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SCHEMA="mtr_wsrep_notify"
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MEMB_TABLE="$SCHEMA.membership"
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STATUS_TABLE="$SCHEMA.status"
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BEGIN="
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SET wsrep_on=0;
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CREATE SCHEMA IF NOT EXISTS $SCHEMA;
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CREATE TABLE IF NOT EXISTS $MEMB_TABLE (
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idx INT,
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uuid CHAR(40), /* node UUID */
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name VARCHAR(32), /* node name */
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addr VARCHAR(256) /* node address */
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) ENGINE=MEMORY;
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CREATE TABLE IF NOT EXISTS $STATUS_TABLE (
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size INT, /* component size */
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idx INT, /* this node index */
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status CHAR(16), /* this node status */
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uuid CHAR(40), /* cluster UUID */
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prim BOOLEAN /* if component is primary */
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) ENGINE=MEMORY;
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BEGIN;
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"
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END="COMMIT;"
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configuration_change()
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{
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echo "$BEGIN;"
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local idx=0
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for NODE in $(echo $MEMBERS | sed s/,/\ /g)
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do
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echo "INSERT INTO $MEMB_TABLE VALUES ( $idx, "
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# Don't forget to properly quote string values
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echo "'$NODE'" | sed s/\\//\',\'/g
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echo ");"
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idx=$(( $idx + 1 ))
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done
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echo "INSERT INTO $STATUS_TABLE VALUES($idx, $INDEX, '$STATUS', '$CLUSTER_UUID', $PRIMARY);"
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echo "$END"
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}
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status_update()
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{
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echo "SET wsrep_on=0; BEGIN; UPDATE $STATUS_TABLE SET status='$STATUS'; COMMIT;"
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}
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COM=status_update # not a configuration change by default
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while [ $# -gt 0 ]
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do
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case $1 in
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--status)
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STATUS=$2
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shift
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;;
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--uuid)
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CLUSTER_UUID=$2
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shift
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;;
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--primary)
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[ "$2" = "yes" ] && PRIMARY="1" || PRIMARY="0"
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COM=configuration_change
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shift
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;;
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--index)
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INDEX=$2
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shift
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;;
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--members)
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MEMBERS=$2
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shift
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;;
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esac
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shift
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done
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# Undefined means node is shutting down
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if [ "$STATUS" != "Undefined" ]
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then
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$COM | mysql -B -u$USER -h$HOST -P$PORT
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fi
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exit 0
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#
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