83 lines
3.0 KiB
YAML
83 lines
3.0 KiB
YAML
apiVersion: v1
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kind: ConfigMap
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metadata:
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name: mariadb-seedsh
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data:
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seed.sh: |+
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#!/bin/sh
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set -ex
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SLEEP_TIMEOUT=5
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function wait_for_cluster {
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# Wait for the mariadb server to be "Ready" before starting the security reset with a max timeout
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TIMEOUT=120
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while [[ ! -f /var/lib/mysql/mariadb.pid ]]; do
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if [[ ${TIMEOUT} -gt 0 ]]; then
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let TIMEOUT-=1
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sleep 1
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else
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exit 1
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fi
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done
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REPLICAS=$(python /tmp/replicas.py)
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# We need to count seed instance here.
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MINIMUM_CLUSTER_SIZE=$(( $REPLICAS + 1 ))
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# wait until we have at least two more members in a cluster.
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while true ; do
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CLUSTER_SIZE=`mysql -uroot -p"{{ .Values.database.root_password }}" --port="{{ .Values.network.port.mariadb }}" -e'show status' | grep wsrep_cluster_size | awk ' { if($2 ~ /[0-9]/){ print $2 } else { print 0 } } '`
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if [ "${CLUSTER_SIZE}" -lt ${MINIMUM_CLUSTER_SIZE} ] ; then
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echo "Cluster seed not finished, waiting."
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sleep ${SLEEP_TIMEOUT}
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continue
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fi
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CLUSTER_STATUS=`mysql -uroot -p"{{ .Values.database.root_password }}" --port="{{ .Values.network.port.mariadb }}" -e'show status' | grep wsrep_local_state_comment | awk ' { print $2 } '`
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if [ "${CLUSTER_STATUS}" != "Synced" ] ; then
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echo "Cluster not synced, waiting."
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sleep ${SLEEP_TIMEOUT}
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continue
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fi
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# Count number of endpoint separators.
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ENDPOINTS_CNT=`python /tmp/peer-finder.py mariadb | grep -o ',' | wc -l`
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# TODO(tomasz.paszkowski): Fix a corner case when only one endpoint is on the list.
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# Add +1 for seed node and +1 as first item does not have a separator
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ENDPOINTS_CNT=$(($ENDPOINTS_CNT+2))
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if [ "${ENDPOINTS_CNT}" != "${CLUSTER_SIZE}" ] ; then
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echo "Cluster not synced, waiting."
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sleep ${SLEEP_TIMEOUT}
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continue
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fi
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echo "Cluster ready, exiting seed."
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kill -- -$$
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break
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done
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}
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# With the DaemonSet implementation, there may be a difference
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# in the number of replicas and actual number of nodes matching
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# mariadb node selector label. Problem will be solved when
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# the implementation will be switched to Deployment
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# (using anti-affinity feature).
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REPLICAS=$(python /tmp/replicas.py)
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if [ "$REPLICAS" -eq 1 ] ; then
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echo "Requested to build one-instance MariaDB cluster. There is no need to run seed. Exiting."
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exit 0
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elif [ "$REPLICAS" -eq 2 ] ; then
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echo "2-instance cluster is not a valid MariaDB configuration."
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exit 1
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fi
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bash /tmp/bootstrap-db.sh
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mysqld_safe --defaults-file=/etc/my.cnf \
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--console \
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--wsrep-new-cluster \
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--wsrep_cluster_address='gcomm://' &
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wait_for_cluster
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exit 0
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