Introduced prestop-script for mariadb-galera

Improved helm upgrade script for mariadb
Added Cron PHP config to configMap

openshift/scripts/deploy-mariadb-galera.sh

@@ -17,13 +17,28 @@ if helm list -q | grep -q "^$DB_DEPLOYMENT_NAME$"; then
     echo "Timeout waiting for $DB_DEPLOYMENT_NAME to scale to 0"
     exit 1
   fi
+
   # helm uninstall $DB_DEPLOYMENT_NAME
   echo "Upgrading $DB_DEPLOYMENT_NAME..."
 
-  helm upgrade $DB_DEPLOYMENT_NAME \
-    oci://registry-1.docker.io/bitnamicharts/mariadb-galera \
-    --set rootUser.password=$DB_PASSWORD \
-    --set galera.mariabackup.password=$DB_PASSWORD
+  # Capture the output of the helm upgrade command into a variable
+  helm_upgrade_response=$(helm upgrade $DB_DEPLOYMENT_NAME oci://registry-1.docker.io/bitnamicharts/mariadb-galera --reuse-values -f ./config/mariadb/galera-values.yaml 2>&1)
+
+   # Output the response for debugging purposes
+  echo "$helm_upgrade_response"
+
+  # Check if the helm upgrade command failed
+  if [[ $? -ne 0 ]]; then
+    echo "Helm upgrade failed with the following output:"
+    echo "$helm_upgrade_response"
+    exit 1
+  fi
+
+  # helm upgrade $DB_DEPLOYMENT_NAME \
+  #   oci://registry-1.docker.io/bitnamicharts/mariadb-galera \
+  #   --set rootUser.password=$DB_PASSWORD \
+  #   --set galera.mariabackup.password=$DB_PASSWORD
+  #   -f ./config/mariadb/galera-values.yaml
     # --set db.password=$DB_PASSWORD \
     # --set db.user=$DB_USER \
     # --set db.name=$DB_NAME \
@@ -58,3 +73,10 @@ else
     --wait \
     -f ./config/mariadb/galera-values.yaml
 fi
+
+# Handle graceful shutdown, and introduce some testing parameters
+oc create configmap $DB_DEPLOYMENT_NAME-prestop-script --from-file=./openshift/scripts/mariadb-prestop.sh
+
+# Add the ConfigMap as a volume and mount it to each container.
+# Also, add the preStop hook to use the script
+oc patch statefulset $DB_DEPLOYMENT_NAME --type=json -p '[{"op": "add", "path": "/spec/template/spec/volumes", "value": [{"name": "prestop-script", "configMap": {"name": "$DB_DEPLOYMENT_NAME-prestop-script"}}]}, {"op": "add", "path": "/spec/template/spec/containers/0/volumeMounts", "value": [{"name": "prestop-script", "mountPath": "/usr/local/bin/prestop.sh", "subPath": "mariadb-prestop.sh"}]}, {"op": "add", "path": "/spec/template/spec/containers/0/lifecycle", "value": {"preStop": {"exec": {"command": ["/bin/sh", "-c", "/usr/local/bin/prestop.sh"]}}}}]'

openshift/scripts/mariadb-prestop.sh

@@ -0,0 +1,41 @@
+#!/bin/bash
+
+# Set the waiting period before the pod is terminated
+# For failover testing purposes (can/should set to 0 in prod)
+WAIT_PERIOD=600  # in seconds
+
+# Function to gracefully stop MariaDB service
+graceful_shutdown() {
+  echo "Initiating graceful shutdown of MariaDB service..."
+
+  # Check if the current pod is the primary (master) pod
+  if mysql -u root -p"$MARIADB_ROOT_PASSWORD" -e "SHOW STATUS LIKE 'wsrep_local_state_comment';" | grep -q "Synced"; then
+    echo "This pod is the primary (master) pod. Proceeding with shutdown..."
+
+    # Set wsrep_on to OFF to stop replication
+    mysql -u root -p"$MARIADB_ROOT_PASSWORD" -e "SET GLOBAL wsrep_on=OFF;"
+
+    # Wait for a few seconds to allow replication to stop
+    sleep 5
+
+    # Shutdown MariaDB service
+    mysqladmin -u root -p"$MARIADB_ROOT_PASSWORD" shutdown
+  else
+    echo "This pod is not the primary (master) pod. Proceeding with shutdown..."
+
+    # Shutdown MariaDB service
+    mysqladmin -u root -p"$MARIADB_ROOT_PASSWORD" shutdown
+  fi
+
+  echo "MariaDB service has been gracefully stopped."
+}
+
+# Run the graceful shutdown function
+graceful_shutdown
+
+# Introduce a waiting period before exiting
+WAIT_MINUTES=$((WAIT_PERIOD / 60))
+echo "Waiting for $WAIT_PERIOD seconds ($WAIT_MINUTES minutes) before exiting..."
+sleep $WAIT_PERIOD
+
+echo "PreStop hook script completed. Exiting..."

openshift/template.json

@@ -448,6 +448,11 @@
                     "name": "${CRON_NAME}-config",
                     "mountPath": "/var/www/html/config.php",
                     "subPath": "config.php"
+                  },
+                  {
+                    "name": "${CRON_NAME}-php-config",
+                    "mountPath": "/usr/local/etc/php/conf.d/moodle-php.ini",
+                    "subPath": "moodle-php.ini"
                   }
                 ],
                 "resources": {
@@ -544,6 +549,13 @@
                   "defaultMode": 420
                 }
               },
+              {
+                "name": "${CRON_NAME}-php-config",
+                "configMap": {
+                  "name": "${CRON_NAME}-php-config",
+                  "defaultMode": 420
+                }
+              },
               {
                 "name": "${APP_NAME}-env",
                 "configMap": {