stackforge/puppet-openstack-cloud
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[galera] Improve clustercheck script

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This commit is contained in:
Mehdi Abaakouk 2014-09-18 09:24:12 +02:00
parent 4075c5f08b
commit 24bd6bc3d8
1 changed files with 39 additions and 20 deletions
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59
templates/database/clustercheck.erb
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@ -4,35 +4,54 @@
#
# Script to make a proxy (ie HAProxy) capable of monitoring Percona XtraDB Cluster nodes properly
#
# Author: Olaf van Zandwijk olaf.vanzandwijk@nedap.com
# Author: Olaf van Zandwijk <olaf.vanzandwijk@nedap.com>
# Mehdi Abaakouk <mehdi.abaakouk@enovance.com>
#
# Documentation and download: https://github.com/olafz/percona-clustercheck
#
# Based on the original script from Unai Rodriguez
#
MYSQL_USERNAME='<%= @galera_clustercheck_dbuser %>'
MYSQL_PASSWORD='<%= @galera_clustercheck_dbpassword %>'
MYSQL_USERNAME="<%= @galera_clustercheck_dbuser %>"
MYSQL_PASSWORD="<%= @galera_clustercheck_dbpassword %>"
TIMEOUT=10
ERR_FILE="/dev/null"
AVAILABLE_WHEN_DONOR=0
#
# Perform the query to check the wsrep_local_state
#
WSREP_STATUS=`mysql --user=${MYSQL_USERNAME} --password=${MYSQL_PASSWORD} -e "SHOW STATUS LIKE 'wsrep_local_state';" 2>${ERR_FILE} | awk '{if (NR!=1){print $2}}' 2>${ERR_FILE}`
MYSQL_CMDLINE="mysql -nNE --connect-timeout=$TIMEOUT --user=${MYSQL_USERNAME} --password=${MYSQL_PASSWORD} "
if [[ "${WSREP_STATUS}" == "4" ]] || [[ "${WSREP_STATUS}" == "2" && ${AVAILABLE_WHEN_DONOR} == 1 ]]
then
# Percona XtraDB Cluster node local state is 'Synced' == return HTTP 200
/bin/echo -en "HTTP/1.1 200 OK\r\n"
mysql_get_status(){
( $MYSQL_CMDLINE -e "SHOW STATUS LIKE '$1';" | tail -1 ) 2>>${ERR_FILE}
}
mysql_get_var(){
( $MYSQL_CMDLINE -e "SHOW GLOBAL VARIABLES LIKE '$1';" | tail -1 ) 2>>${ERR_FILE}
}
http_response(){
status=$1
shift
msg="$@"
if [ "$status" == 200 ]; then
/bin/echo -en "HTTP/1.1 200 OK\r\n"
else
/bin/echo -en "HTTP/1.1 503 Service Unavailable\r\n"
fi
/bin/echo -en "Content-Type: text/plain\r\n"
/bin/echo -en "\r\n"
/bin/echo -en "Mariadb Cluster Node is synced.\r\n"
/bin/echo -en "$msg\r\n"
/bin/echo -en "\r\n"
else
# Percona XtraDB Cluster node local state is not 'Synced' == return HTTP 503
/bin/echo -en "HTTP/1.1 503 Service Unavailable\r\n"
/bin/echo -en "Content-Type: text/plain\r\n"
/bin/echo -en "\r\n"
/bin/echo -en "Mariadb Cluster Node is not synced.\r\n"
/bin/echo -en "\r\n"
fi
}
WSREP_LOCAL_STATE=$(mysql_get_status wsrep_local_state)
WSREP_READY=$(mysql_get_status wsrep_ready)
WSREP_CONNECTED=$(mysql_get_status wsrep_connected)
READY_ONLY=$(mysql_get_var read_only)
case ${AVAILABLE_WHEN_DONOR}-${WSREP_LOCAL_STATE}-${WSREP_READY}-${WSREP_CONNECTED}-${READY_ONLY} in
1-2-ON-ON-OFF|0-4-ON-ON-OFF) http_response 200 "Mariadb Cluster Node is synced, ready and connected." ;;
*-*-OFF-*-*) http_response 503 "Mariadb Cluster Node is not ready." ;;
*-*-*-OFF-*) http_response 503 "Mariadb Cluster Node is not connected" ;;
*-*-*-*-ON) http_response 503 "Mariadb Cluster Node is readonly" ;;
*) http_response 503 "Mariadb Cluster Node is not synced" ;;
esac