Updates

dsql-app/docker/mariadb/Dockerfile

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+FROM mariadb:11-jammy
+
+RUN apt update
+RUN apt install -y curl wget zip unzip xz-utils galera-4
+
+COPY entrypoint.sh /usr/local/bin/entrypoint.sh
+RUN chmod +x /usr/local/bin/entrypoint.sh
+
+COPY .bash_history /root/.bash_history
+
+ENTRYPOINT ["entrypoint.sh"]
+CMD [ "mariadbd" ]

dsql-app/docker/mariadb/docker-compose.yaml

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+name: galera
+
+services:
+    mariadb-node1:
+        build:
+            context: .
+            dockerfile: Dockerfile
+        networks:
+            galera:
+        container_name: mariadb-node1
+        environment:
+            - MARIADB_ROOT_PASSWORD=password
+        volumes:
+            - ./conf.d/node1.cnf:/etc/mysql/conf.d/galera.cnf
+            - ./db:/var/lib/mysql
+
+    mariadb-node2:
+        build:
+            context: .
+            dockerfile: Dockerfile
+        container_name: mariadb-node2
+        networks:
+            galera:
+        environment:
+            - MARIADB_ROOT_PASSWORD=password
+        volumes:
+            - ./conf.d/node2.cnf:/etc/mysql/conf.d/galera.cnf
+        command: ["mariadbd"]
+
+    mariadb-node3:
+        build:
+            context: .
+            dockerfile: Dockerfile
+        container_name: mariadb-node3
+        networks:
+            galera:
+        environment:
+            - MARIADB_ROOT_PASSWORD=password
+        volumes:
+            - ./conf.d/node3.cnf:/etc/mysql/conf.d/galera.cnf
+        command: ["mariadbd"]
+
+networks:
+    galera:
+        driver: bridge

dsql-app/docker/mariadb/entrypoint.sh

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+#!/bin/bash
+
+# Path to the grastate.dat file
+GRSTATE_FILE="/var/lib/mysql/grastate.dat"
+
+# Check if the MARIADB_SLAVE environment variable is set
+if [ ! -z "$MARIADB_SLAVE" ]; then
+    # If MARIADB_SLAVE is set, this node is a slave, so just run mariadbd (no --wsrep-new-cluster)
+    echo "MARIADB_SLAVE environment variable is set. Starting as a slave node."
+    exec mariadbd "$@"
+else
+    # If grastate.dat exists, check if the cluster has already been bootstrapped
+    if [ -f "$GRSTATE_FILE" ]; then
+        # Read the value of safe_to_bootstrap from grastate.dat
+        SAFE_TO_BOOTSTRAP=$(grep -E "^safe_to_bootstrap" "$GRSTATE_FILE" | cut -d ':' -f 2 | tr -d ' ')
+
+        if [ "$SAFE_TO_BOOTSTRAP" == "1" ]; then
+            # Cluster is already bootstrapped, so start mariadbd without --wsrep-new-cluster
+            echo "Cluster is already bootstrapped. Starting mariadbd without --wsrep-new-cluster."
+            exec mariadbd "$@"
+        else
+            # Cluster is not bootstrapped, so run mariadbd with --wsrep-new-cluster
+            echo "Cluster is not bootstrapped. Bootstrapping the cluster."
+            exec mariadbd --wsrep-new-cluster "$@"
+        fi
+    else
+        # If grastate.dat doesn't exist, assume it's a new cluster and bootstrap it
+        echo "grastate.dat not found. Bootstrapping the cluster."
+        exec mariadbd --wsrep-new-cluster "$@"
+    fi
+fi