fixing the container spin up dependency issue wrt sql

Author: Ashish Mishra

Dockerfile

@@ -1,19 +1,26 @@
+# Stage 1: Build the jar
 FROM maven:3.8.5-openjdk-17 AS JARBUILDER
 
-WORKDIR build
+WORKDIR /build
 
 COPY src src
 COPY pom.xml pom.xml
 
 RUN mvn clean package -DskipTests
 
-# above we are builing the project jar file and consuming it below to launch the application
-
+# Stage 2: Run the app
 FROM bellsoft/liberica-openjre-alpine
 
-WORKDIR springApplication/app
+WORKDIR /springApplication/app
+
+# Copy the jar file from the builder stage
+COPY --from=JARBUILDER /build/target/*.jar app.jar
 
-COPY --from=JARBUILDER build/target/*.jar app.jar
+# Copy wait-for.sh into the image
+COPY wait-for.sh .
 
-CMD ["java", "-jar", "app.jar"]
+# Make the script executable
+RUN chmod +x wait-for.sh
 
+# Use wait-for.sh as entrypoint
+ENTRYPOINT ["./wait-for.sh", "mysql-service", "java", "-jar", "app.jar"]

docker-compose.yaml

@@ -17,7 +17,7 @@ services:
     #      - "8082:3306"    removing port mapping since by default the 3306 will expose the functionality
     volumes:
       - ./src/main/resources/dockerizedEntireApp/init-script:/docker-entrypoint-initdb.d
-      - ./src/main/resources/dockerizedEntireApp/volumes/mysql_data:/var/lib/mysql
+#      - ./src/main/resources/dockerizedEntireApp/volumes/mysql_data:/var/lib/mysql
     profiles:
       - entireApp
     networks:
@@ -34,7 +34,7 @@ services:
         - "8082:3306"
     volumes:
       - ./src/main/resources/dockerizedEntireApp/init-script:/docker-entrypoint-initdb.d
-      - ./src/main/resources/dockerizedEntireApp/volumes/mysql_data:/var/lib/mysql
+#      - ./src/main/resources/dockerizedEntireApp/volumes/mysql_data:/var/lib/mysql
     profiles:
       - onlyDb
     networks:

src/main/java/com/beneite/SpringWithDocker/.DS_Store

@@ -1,6 +1,6 @@
 spring.application.name=SpringWithDocker
 
-# Database connection (using dockerize postgress Db)
+# Database connection (using dockerize sql Db)
 spring.datasource.url=jdbc:mysql://localhost:8082/userManagementDb?useSSL=false&allowPublicKeyRetrieval=true
 spring.datasource.username=ashish
 spring.datasource.password=ashish@123
@@ -11,7 +11,7 @@ spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
 # JPA (Hibernate) Configuration
 spring.jpa.database-platform=org.hibernate.dialect.MySQL8Dialect
 # Use `create` for fresh DB setup, `update` for incremental changes
-spring.jpa.hibernate.ddl-auto=update
+spring.jpa.hibernate.ddl-auto=none
 spring.jpa.hibernate.naming.physical-strategy=org.hibernate.boot.model.naming.PhysicalNamingStrategyStandardImpl
 
 

src/main/java/com/beneite/SpringWithDocker/dto/.DS_Store

@@ -0,0 +1,16 @@
+#!/bin/sh
+# wait-for.sh
+
+set -e
+
+host="$1"
+shift
+cmd="$@"
+
+until nc -z "$host" 3306; do
+  >&2 echo "MySQL is unavailable - sleeping"
+  sleep 2
+done
+
+>&2 echo "MySQL is up - executing command"
+exec $cmd