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#!/bin/sh -eu
# This is a simple example of wsrep notification script (wsrep_notify_cmd).
# It will create 'wsrep' schema and two tables in it: 'membeship' and 'status'
# and fill them on every membership or node status change.
#
# Edit parameters below to specify the address and login to server:
#
USER='root'
PSWD='rootpass'
#
# If these parameters are not set, then the values
# passed by the server are taken:
#
HOST="127.0.0.1"
PORT=3306
#
# Edit parameters below to specify SSL parameters:
#
ssl_cert=""
ssl_key=""
ssl_ca=""
ssl_capath=""
ssl_cipher=""
ssl_crl=""
ssl_crlpath=""
ssl_verify_server_cert=0
#
# Client executable path:
#
CLIENT="mysql"
#
# Name of schema and tables:
#
SCHEMA="wsrep"
MEMB_TABLE="$SCHEMA.membership"
STATUS_TABLE="$SCHEMA.status"
WSREP_ON='SET wsrep_on=ON'
WSREP_OFF='SET wsrep_on=OFF'
BEGIN="CREATE SCHEMA IF NOT EXISTS $SCHEMA;
CREATE TABLE IF NOT EXISTS $MEMB_TABLE (
idx INT UNIQUE PRIMARY KEY,
uuid CHAR(40) UNIQUE, /* node UUID */
name VARCHAR(32), /* node name */
addr VARCHAR(256) /* node address */
) ENGINE=MEMORY;
CREATE TABLE IF NOT EXISTS $STATUS_TABLE (
size INT, /* component size */
idx INT, /* this node index */
status CHAR(16), /* this node status */
uuid CHAR(40), /* cluster UUID */
prim BOOLEAN /* if component is primary */
) ENGINE=MEMORY;
BEGIN"
END="COMMIT; $WSREP_ON"
configuration_change()
{
echo "$WSREP_OFF; DROP SCHEMA IF EXISTS $SCHEMA; $BEGIN;"
local idx=0
for NODE in $(echo "$MEMBERS" | sed s/,/\ /g)
do
echo "INSERT INTO $MEMB_TABLE VALUES ( $idx, "
# Don't forget to properly quote string values
echo "'$NODE'" | sed s/\\//\',\'/g
echo ");"
idx=$(( $idx+1 ))
done
echo "INSERT INTO $STATUS_TABLE VALUES($idx, $INDEX, '$STATUS', '$CLUSTER_UUID', $PRIMARY);"
echo "$END;"
}
status_update()
{
echo "$WSREP_OFF; $BEGIN; UPDATE $STATUS_TABLE SET status='$STATUS'; $END;"
}
trim_string()
{
if [ -n "${BASH_VERSION:-}" ]; then
local pattern="[![:space:]${2:-}]"
local x="${1#*$pattern}"
local z=${#1}
x=${#x}
if [ $x -ne $z ]; then
local y="${1%$pattern*}"
y=${#y}
x=$(( z-x-1 ))
y=$(( y-x+1 ))
printf '%s' "${1:$x:$y}"
else
printf ''
fi
else
local pattern="[[:space:]${2:-}]"
echo "$1" | sed -E "s/^$pattern+|$pattern+\$//g"
fi
}
COM='status_update' # not a configuration change by default
STATUS=""
CLUSTER_UUID=""
PRIMARY=0
INDEX=""
MEMBERS=""
while [ $# -gt 0 ]; do
case $1 in
'--status')
STATUS=$(trim_string "$2")
shift
;;
'--uuid')
CLUSTER_UUID=$(trim_string "$2")
shift
;;
'--primary')
arg=$(trim_string "$2")
[ "$arg" = 'yes' ] && PRIMARY=1 || PRIMARY=0
COM='configuration_change'
shift
;;
'--index')
INDEX=$(trim_string "$2")
shift
;;
'--members')
MEMBERS=$(trim_string "$2")
shift
;;
esac
shift
done
USER=$(trim_string "$USER")
PSWD=$(trim_string "$PSWD")
HOST=$(trim_string "$HOST")
PORT=$(trim_string "$PORT")
case "$HOST" in
\[*)
HOST="${HOST##\[}"
HOST=$(trim_string "${HOST%%\]}")
;;
esac
if [ -z "$HOST" ]; then
HOST="${NOTIFY_HOST:-}"
fi
if [ -z "$PORT" ]; then
PORT="${NOTIFY_PORT:-}"
fi
ssl_key=$(trim_string "$ssl_key");
ssl_cert=$(trim_string "$ssl_cert");
ssl_ca=$(trim_string "$ssl_ca");
ssl_capath=$(trim_string "$ssl_capath");
ssl_cipher=$(trim_string "$ssl_cipher");
ssl_crl=$(trim_string "$ssl_crl");
ssl_crlpath=$(trim_string "$ssl_crlpath");
ssl_verify_server_cert=$(trim_string "$ssl_verify_server_cert");
SSL_PARAM=""
if [ -n "$ssl_key$ssl_cert$ssl_ca$ssl_capath$ssl_cipher$ssl_crl$ssl_crlpath" ]
then
SSL_PARAM=' --ssl'
[ -n "$ssl_key" ] && SSL_PARAM="$SSL_PARAM --ssl-key='$ssl_key'"
[ -n "$ssl_cert" ] && SSL_PARAM="$SSL_PARAM --ssl-cert='$ssl_cert'"
[ -n "$ssl_ca" ] && SSL_PARAM="$SSL_PARAM --ssl-ca='$ssl_ca'"
[ -n "$ssl_capath" ] && SSL_PARAM="$SSL_PARAM --ssl-capath='$ssl_capath'"
[ -n "$ssl_cipher" ] && SSL_PARAM="$SSL_PARAM --ssl-cipher='$ssl_cipher'"
[ -n "$ssl_crl" ] && SSL_PARAM="$SSL_PARAM --ssl-crl='$ssl_crl'"
[ -n "$ssl_crlpath" ] && SSL_PARAM="$SSL_PARAM --ssl-crlpath='$ssl_crlpath'"
if [ -n "$ssl_verify_server_cert" ]; then
if [ "$ssl_verify_server_cert" != "0" -o \
"$ssl_verify_server_cert" = "on" ]
then
SSL_PARAM="$SSL_PARAM --ssl-verify-server-cert"
fi
fi
fi
case "$STATUS" in
'joined' | 'donor' | 'synced')
"$COM" | eval "$CLIENT" -B "-u'$USER'"${PSWD:+" -p'$PSWD'"}\
"-h'$HOST'" "-P$PORT"$SSL_PARAM
;;
*)
# The node might be shutting down or not initialized
;;
esac
exit 0