upgrade spring boot and jdk

Author: ashutoshsahoo

Dockerfile

@@ -1,10 +1,10 @@
-FROM openjdk:17-slim as builder
+FROM openjdk:21-slim AS builder
 WORKDIR /usr/local/temp
 ARG JAR_FILE=build/libs/*.jar
 ADD ${JAR_FILE} application.jar
-RUN java -Djarmode=layertools -jar application.jar extract
+RUN java -Djarmode=tools -jar application.jar extract --layers --launcher
 
-FROM openjdk:17-slim
+FROM openjdk:21-slim
 ARG VERSION=latest
 LABEL version=${VERSION}
 LABEL maintainer="Ashutosh Sahoo"
@@ -13,8 +13,8 @@ LABEL description="spring-boot-kubernetes-mysql"
 WORKDIR /usr/local/app
 RUN useradd --user-group --system --create-home --no-log-init app
 USER app
-COPY --from=builder /usr/local/temp/dependencies/ ./
-COPY --from=builder /usr/local/temp/spring-boot-loader/ ./
-COPY --from=builder /usr/local/temp/snapshot-dependencies/ ./
-COPY --from=builder /usr/local/temp/application/ ./
-ENTRYPOINT ["java","org.springframework.boot.loader.JarLauncher"]
+COPY --from=builder /usr/local/temp/application/spring-boot-loader/ ./
+COPY --from=builder /usr/local/temp/application/snapshot-dependencies/ ./
+COPY --from=builder /usr/local/temp/application/dependencies/ ./
+COPY --from=builder /usr/local/temp/application/application/ ./
+ENTRYPOINT ["java","org.springframework.boot.loader.launch.JarLauncher"]

README.md

@@ -6,8 +6,8 @@ Sample project to test and deploy spring boot application with mysql database in
 
 - Docker with kubernetes enabled
 - Kubernetes command-line tool(kubectl)
-- JDK 17 LTS
-- Gradle
+- JDK 21 LTS
+- Gradle 8
 
 ## Start application
 

build.gradle

@@ -1,60 +1,65 @@
 plugins {
-	id 'java'
-	id 'org.springframework.boot' version '3.0.5'
-	id 'io.spring.dependency-management' version '1.1.0'
-	id 'idea'
-	id 'com.palantir.docker' version '0.35.0'
+    id 'java'
+    id 'org.springframework.boot' version '3.3.0'
+    id 'io.spring.dependency-management' version '1.1.5'
+    id 'idea'
+    id 'com.palantir.docker' version '0.36.0'
 }
 
 group 'com.ashu.practice'
-version '5.0.0'
+version '6.0.0'
 
-sourceCompatibility = '17'
-
-repositories {
-	mavenCentral()
+java {
+    toolchain {
+        languageVersion = JavaLanguageVersion.of(21)
+    }
 }
 
 configurations {
-	compileOnly {
-		extendsFrom annotationProcessor
-	}
+    compileOnly {
+        extendsFrom annotationProcessor
+    }
+}
+
+repositories {
+    mavenCentral()
 }
 
 dependencies {
-	implementation 'org.springframework.boot:spring-boot-starter-actuator'
-	implementation 'org.springframework.boot:spring-boot-starter-web'
-	implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
-	runtimeOnly 'com.mysql:mysql-connector-j'
-	compileOnly 'org.projectlombok:lombok'
-	annotationProcessor 'org.springframework.boot:spring-boot-configuration-processor'
-	annotationProcessor 'org.projectlombok:lombok'
-	testImplementation 'org.springframework.boot:spring-boot-starter-test'
-	testImplementation 'com.h2database:h2'
+    implementation 'org.springframework.boot:spring-boot-starter-actuator'
+    implementation 'org.springframework.boot:spring-boot-starter-web'
+    implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
+    runtimeOnly 'com.mysql:mysql-connector-j'
+    compileOnly 'org.projectlombok:lombok'
+    annotationProcessor 'org.springframework.boot:spring-boot-configuration-processor'
+    annotationProcessor 'org.projectlombok:lombok'
+    testImplementation 'org.springframework.boot:spring-boot-starter-test'
+    testImplementation 'com.h2database:h2'
+    testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
 }
 
 tasks.named('test') {
-	useJUnitPlatform()
+    useJUnitPlatform()
 }
 
 
 jar {
-	enabled = false
+    enabled = false
 }
 
 docker {
-	dependsOn bootJar
-	name "ashutoshsahoo/${project.name}:latest"
-	buildArgs([JAR_FILE: "${project.name}-${project.version}.jar", VERSION: "${project.version}"])
-	files bootJar
+    dependsOn bootJar
+    name "ashutoshsahoo/${project.name}:latest"
+    buildArgs([JAR_FILE: "${project.name}-${project.version}.jar", VERSION: "${project.version}"])
+    files bootJar
 //    tag 'latest', "${project.parent.version}"
 //    noCache true
 }
 
 
 idea {
-	module {
-		downloadJavadoc = true
-		downloadSources = true
-	}
+    module {
+        downloadJavadoc = true
+        downloadSources = true
+    }
 }

deployment/app-k8s.yaml

@@ -7,7 +7,7 @@ items:
     metadata:
       labels:
         app: spring-boot-kubernetes-mysql
-        version: 5.0.0
+        version: 6.0.0
       name: spring-boot-kubernetes-mysql
     spec:
       ports:
@@ -30,7 +30,7 @@ items:
     metadata:
       labels:
         app: spring-boot-kubernetes-mysql
-        version: 5.0.0
+        version: 6.0.0
       name: spring-boot-kubernetes-mysql
     spec:
       selector:
@@ -40,12 +40,12 @@ items:
         metadata:
           labels:
             app: spring-boot-kubernetes-mysql
-            version: 5.0.0
+            version: 6.0.0
         spec:
           serviceAccountName: spring-boot-kubernetes-mysql
           containers:
             - name: spring-boot-kubernetes-mysql
-              image: ashutoshsahoo/spring-boot-kubernetes-mysql:5.0.0
+              image: ashutoshsahoo/spring-boot-kubernetes-mysql:6.0.0
               imagePullPolicy: IfNotPresent
               resources:
                 limits:

src/main/resources/application.yml

@@ -2,6 +2,10 @@ server:
   servlet:
     context-path: /api/v1
 spring:
+  application:
+    name: spring-boot-kubernetes-mysql
+  main:
+    banner-mode: off
   jpa:
     open-in-view: false
 #  datasource: