7400fef226
1. Apply all the patch fixes in old branches. 2. Adaptive the latest cmake version and change spec file. 3. Refresh the systemd services files accordlly. 4. Fix up all scripts when cmake is too new for mariadb. (cherry picked from commit 91ecc4121887ef7f6568932a32523a43ab88b0a3)
90 lines
3.2 KiB
Bash
90 lines
3.2 KiB
Bash
#!/bin/bash
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#
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# Script to make a proxy (ie HAProxy) capable of monitoring Galera cluster nodes properly
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#
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# Author: Olaf van Zandwijk <olaf.vanzandwijk@nedap.com>
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# Author: Raghavendra Prabhu <raghavendra.prabhu@percona.com>
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# Author: Ryan O'Hara <rohara@redhat.com>
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#
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# Documentation and download: https://github.com/olafz/percona-clustercheck
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#
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# Based on the original script from Unai Rodriguez
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#
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if [ -f /etc/sysconfig/clustercheck ]; then
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. /etc/sysconfig/clustercheck
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fi
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MYSQL_USERNAME="${MYSQL_USERNAME-clustercheckuser}"
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MYSQL_PASSWORD="${MYSQL_PASSWORD-clustercheckpassword!}"
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MYSQL_HOST="${MYSQL_HOST:-127.0.0.1}"
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MYSQL_PORT="${MYSQL_PORT:-3306}"
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ERR_FILE="${ERR_FILE:-/dev/null}"
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AVAILABLE_WHEN_DONOR=${AVAILABLE_WHEN_DONOR:-0}
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AVAILABLE_WHEN_READONLY=${AVAILABLE_WHEN_READONLY:-1}
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DEFAULTS_EXTRA_FILE=${DEFAULTS_EXTRA_FILE:-/etc/my.cnf}
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#Timeout exists for instances where mysqld may be hung
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TIMEOUT=10
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if [[ -r $DEFAULTS_EXTRA_FILE ]];then
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MYSQL_CMDLINE="mysql --defaults-extra-file=$DEFAULTS_EXTRA_FILE -nNE \
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--connect-timeout=$TIMEOUT \
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--user=${MYSQL_USERNAME} --password=${MYSQL_PASSWORD} \
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--host=${MYSQL_HOST} --port=${MYSQL_PORT}"
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else
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MYSQL_CMDLINE="mysql -nNE --connect-timeout=$TIMEOUT \
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--user=${MYSQL_USERNAME} --password=${MYSQL_PASSWORD} \
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--host=${MYSQL_HOST} --port=${MYSQL_PORT}"
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fi
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#
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# Perform the query to check the wsrep_local_state
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#
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WSREP_STATUS=$($MYSQL_CMDLINE -e "SHOW STATUS LIKE 'wsrep_local_state';" \
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2>${ERR_FILE} | tail -1 2>>${ERR_FILE})
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if [[ "${WSREP_STATUS}" == "4" ]] || [[ "${WSREP_STATUS}" == "2" && ${AVAILABLE_WHEN_DONOR} == 1 ]]
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then
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# Check only when set to 0 to avoid latency in response.
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if [[ $AVAILABLE_WHEN_READONLY -eq 0 ]];then
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READ_ONLY=$($MYSQL_CMDLINE -e "SHOW GLOBAL VARIABLES LIKE 'read_only';" \
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2>${ERR_FILE} | tail -1 2>>${ERR_FILE})
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if [[ "${READ_ONLY}" == "ON" ]];then
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# Galera cluster node local state is 'Synced', but it is in
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# read-only mode. The variable AVAILABLE_WHEN_READONLY is set to 0.
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# => return HTTP 503
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# Shell return-code is 1
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echo -en "HTTP/1.1 503 Service Unavailable\r\n"
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echo -en "Content-Type: text/plain\r\n"
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echo -en "Connection: close\r\n"
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echo -en "Content-Length: 35\r\n"
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echo -en "\r\n"
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echo -en "Galera cluster node is read-only.\r\n"
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sleep 0.1
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exit 1
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fi
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fi
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# Galera cluster node local state is 'Synced' => return HTTP 200
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# Shell return-code is 0
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echo -en "HTTP/1.1 200 OK\r\n"
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echo -en "Content-Type: text/plain\r\n"
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echo -en "Connection: close\r\n"
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echo -en "Content-Length: 32\r\n"
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echo -en "\r\n"
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echo -en "Galera cluster node is synced.\r\n"
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sleep 0.1
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exit 0
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else
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# Galera cluster node local state is not 'Synced' => return HTTP 503
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# Shell return-code is 1
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echo -en "HTTP/1.1 503 Service Unavailable\r\n"
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echo -en "Content-Type: text/plain\r\n"
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echo -en "Connection: close\r\n"
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echo -en "Content-Length: 36\r\n"
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echo -en "\r\n"
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echo -en "Galera cluster node is not synced.\r\n"
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sleep 0.1
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exit 1
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fi
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