No longer using memcached. Replication settings for standalong mariadb. Use --single-transaction in mariadb replica-watcher so mysqldump does not lock tables. Added horizontal pod autoscaler to the app statefulset

deploy/kubernetes/manifests/mariadb-replica-watcher.yaml

@@ -122,12 +122,12 @@ spec:
               DUMP_FILE="/tmp/${DB_NAME}_backup.sql"
               echo "Dumping ${DB_NAME} from master ${MASTER_SERVICE_HOST}" | tee -a "$LOG"
               if command -v timeout >/dev/null 2>&1; then
-                if ! timeout 300 mysqldump --protocol=TCP -h "$MASTER_SERVICE_HOST" -uroot -p"$MARIADB_ROOT_PASSWORD" "$DB_NAME" \
+                if ! timeout 300 mysqldump --protocol=TCP -h "$MASTER_SERVICE_HOST" -uroot -p"$MARIADB_ROOT_PASSWORD" --single-transaction "$DB_NAME" \
                      | tee "$DUMP_FILE" >/dev/null 2>>"$LOG"; then
                   echo "Dump FAILED; aborting this cycle" | tee -a "$LOG"; sleep 120; continue
                 fi
               else
-                if ! mysqldump --protocol=TCP -h "$MASTER_SERVICE_HOST" -uroot -p"$MARIADB_ROOT_PASSWORD" "$DB_NAME" \
+                if ! mysqldump --protocol=TCP -h "$MASTER_SERVICE_HOST" -uroot -p"$MARIADB_ROOT_PASSWORD" --single-transaction "$DB_NAME" \
                      | tee "$DUMP_FILE" >/dev/null 2>>"$LOG"; then
                   echo "Dump FAILED; aborting this cycle" | tee -a "$LOG"; sleep 120; continue
                 fi

deploy/kubernetes/manifests/mariadb-standalone.yaml

@@ -240,4 +240,12 @@ data:
     table_open_cache=4000
     expire_logs_days=7
 
+    # master slave
+    server_id=1                       # Unique server ID for the master
+    log_bin=mysql-bin                 # Enable binary logging
+    binlog_format=ROW                 # Recommended format for replication (ROW, STATEMENT, or MIXED)
+    log_slave_updates=ON              # Ensure any changes replicated to the master are also logged to the binary log (useful for multi-source replication)
+    sync_binlog=1                     # Ensures binary logs are synchronized with disk after each transaction for data safety
+    expire_logs_days=7                # Optional: Number of days to retain binary logs (helps with cleanup)
+    
     # /etc/mysql/mariadb.conf.d/70-mysettings.cnf

deploy/kubernetes/manifests/memcached-standalone.yaml

@@ -1,42 +0,0 @@
-apiVersion: v1
-kind: Service
-metadata:
-  name: wrestlingdev-memcached
-  labels:
-    app: wrestlingdev
-spec:
-  ports:
-    - port: 11211
-  selector:
-    app: wrestlingdev
-    tier: memcached
-  clusterIP: None
----
-apiVersion: apps/v1
-kind: Deployment
-metadata:
-  name: wrestlingdev-memcached-deployment
-  labels:
-    app: wrestlingdev
-spec:
-  replicas: 1
-  selector:
-    matchLabels:
-      app: wrestlingdev
-  template:
-    metadata:
-      labels:
-        app: wrestlingdev
-        tier: memcached
-    spec:
-      containers:
-      - name: wrestlingdev-memcached
-        image: memcached
-        ports:
-        - containerPort: 11211
-        resources:
-          limits:
-            memory: "64Mi"
-          # requests:
-          #   memory: "64Mi"
-          #   cpu: "0.1"

deploy/kubernetes/manifests/wrestlingdev.yaml

@@ -122,25 +122,27 @@ spec:
           initialDelaySeconds: 180
           periodSeconds: 20
           timeoutSeconds: 10
-# ---
-# apiVersion: autoscaling/v2beta1
-# kind: HorizontalPodAutoscaler
-# metadata:
-#   name: wrestlingdev-app-deployment-autoscale
-# spec:
-#   scaleTargetRef:
-#     apiVersion: apps/v1
-#     kind: Deployment
-#     name: wrestlingdev-app-deployment
-#   minReplicas: 2
-#   maxReplicas: 5
-#   metrics:
-#   - type: Resource
-#     resource:
-#       name: cpu
-#       targetAverageUtilization: 75
-  # - type: Resource
-  #   resource:
-  #     name: memory
-  #     targetAverageValue: 100Mi
+---
+apiVersion: autoscaling/v2beta1
+kind: HorizontalPodAutoscaler
+metadata:
+  name: wrestlingdev-app-autoscale
+spec:
+  scaleTargetRef:
+    apiVersion: apps/v1
+    kind: StatefulSet
+    name: wrestlingdev-app
+  minReplicas: 2
+  maxReplicas: 5
+  metrics:
+  - type: Resource
+    resource:
+      name: cpu
+      targetAverageUtilization: 75
+  - type: Resource
+    resource:
+      name: memory
+      target:
+        type: Utilization
+        averageUtilization: 80