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#!/bin/bash
MYSQL_USER=$(kubectl exec -n $NAMESPACE_ENV \
{{ include "common.fullname" . }}-0 -- printenv MYSQL_USER)
MYSQL_PASSWORD=$(kubectl exec -n $NAMESPACE_ENV \
{{ include "common.fullname" . }}-0 -- printenv MYSQL_PASSWORD)
MYSQL_ROOT_PASSWORD=$(kubectl exec -n $NAMESPACE_ENV \
{{ include "common.fullname" . }}-0 -- printenv MYSQL_ROOT_PASSWORD)
kubectl create secret generic \
'{{ include "common.fullname" . }}'-temp-upgrade-root \
--from-literal=password=$MYSQL_ROOT_PASSWORD
kubectl create secret generic \
'{{ include "common.fullname" . }}'-temp-upgrade-usercred \
--from-literal=login=$MYSQL_USER --from-literal=password=$MYSQL_PASSWORD
kubectl create -f /upgrade/create-deployment.yml
TEMP_POD=$(kubectl get pod -n $NAMESPACE_ENV --selector \
app='{{ include "common.fullname" . }}' -o \
jsonpath='{.items[?(@.metadata.ownerReferences[].kind=="ReplicaSet")].metadata.name}')
CLUSTER_NO=$(kubectl exec -n $NAMESPACE_ENV $TEMP_POD -- \
mysql --skip-column-names -h{{ $.Values.service.name }} -u$MYSQL_USER \
-p$MYSQL_PASSWORD -e "SHOW GLOBAL STATUS LIKE 'wsrep_cluster_size';" | \
awk '{print $2}')
CLUSTER_STATE=$(kubectl exec -n $NAMESPACE_ENV $TEMP_POD -- \
mysql --skip-column-names -h{{ $.Values.service.name }} -u$MYSQL_USER \
-p$MYSQL_PASSWORD -e "SHOW GLOBAL STATUS LIKE 'wsrep_local_state_comment';" \
| awk '{print $2}')
STS_REPLICA=$(kubectl get statefulsets -n $NAMESPACE_ENV \
{{ include "common.fullname" . }} -o jsonpath='{.status.replicas}')
DEPLOYMENT_REPLICA=$(kubectl get deployment -n $NAMESPACE_ENV \
{{ include "common.fullname" . }}-upgrade-deployment -o \
jsonpath='{.status.replicas}')
while [[ ! $CLUSTER_NO == $((STS_REPLICA+DEPLOYMENT_REPLICA)) ]] \
|| [[ ! $CLUSTER_STATE == "Synced" ]]
do
echo "$CLUSTER_NO and $CLUSTER_STATE"
CLUSTER_NO=$(kubectl exec -n $NAMESPACE_ENV $TEMP_POD -- mysql \
--skip-column-names -h{{ $.Values.service.name }} -u$MYSQL_USER \
-p$MYSQL_PASSWORD -e "SHOW GLOBAL STATUS LIKE 'wsrep_cluster_size';" \
| awk '{print $2}')
CLUSTER_STATE=$(kubectl exec -n $NAMESPACE_ENV $TEMP_POD -- mysql \
--skip-column-names -h{{ $.Values.service.name }} -u$MYSQL_USER \
-p$MYSQL_PASSWORD -e "SHOW GLOBAL STATUS LIKE 'wsrep_local_state_comment';" \
| awk '{print $2}')
sleep 2
if [[ $CLUSTER_NO == $((STS_REPLICA+DEPLOYMENT_REPLICA)) ]] \
&& [[ $CLUSTER_STATE == "Synced" ]]
then
echo "The cluster has $CLUSTER_NO members and $CLUSTER_STATE state."
break
fi
done
MYSQL_STATUS=$(kubectl exec -n $NAMESPACE_ENV $TEMP_POD -- mysqladmin \
-uroot -p$MYSQL_ROOT_PASSWORD ping)
while [[ ! $MYSQL_STATUS == "mysqld is alive" ]]
do
echo "Mariadb deployment is not ready yet."
sleep 2
MYSQL_STATUS=$(kubectl exec -n $NAMESPACE_ENV $TEMP_POD -- mysqladmin \
-uroot -p$MYSQL_ROOT_PASSWORD ping)
if [[ $MYSQL_STATUS == "mysqld is alive" ]]
then
echo "Mariadb deployment is ready."
break
fi
done
kubectl scale statefulsets {{ include "common.fullname" . }} --replicas=0
MY_REPLICA_NUMBER=$(kubectl get statefulsets -n $NAMESPACE_ENV \
{{ include "common.fullname" . }} -o jsonpath='{.status.replicas}')
echo "The the cluster has $MY_REPLICA_NUMBER replicas."
while [[ ! $MY_REPLICA_NUMBER == "0" ]]
do
echo "The cluster is not scaled to 0 yet. Please wait ..."
MY_REPLICA_NUMBER=$(kubectl get statefulsets -n $NAMESPACE_ENV \
{{ include "common.fullname" . }} -o jsonpath='{.status.replicas}')
echo "The current status of the cluster is $MY_REPLICA_NUMBER"
sleep 2
if [[ $MY_REPLICA_NUMBER == "0" ]]
then
break
fi
done
for (( index=0; index<$STS_REPLICA; index+=1 ))
do
kubectl delete pvc \
"{{ include "common.fullname" . }}-data-{{ include "common.fullname" . }}-$index"
done
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