Initial implementation

.dockerignore

@@ -0,0 +1,3 @@
+.idea
+.vscode
+.github

.github/workflows/test.yml

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+name: test
+
+on:
+  push:
+    branches: [ "master" ]
+  pull_request:
+    branches: [ "master" ]
+
+jobs:
+  unit-tests:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up JDK 17
+        uses: actions/setup-java@v4
+        with:
+          java-version: '17'
+          distribution: 'temurin'
+      - name: Setup Gradle
+        uses: gradle/actions/setup-gradle@v4
+      - name: Run Unit Tests
+        run: ./gradlew :lib:test --parallel
+
+  integration-tests:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up JDK 17
+        uses: actions/setup-java@v4
+        with:
+          java-version: '17'
+          distribution: 'temurin'
+      - name: Setup Minikube
+        uses: medyagh/setup-minikube@latest
+      - name: Setup Gradle
+        uses: gradle/actions/setup-gradle@v4
+      - name: Run Integration Tests
+        run: |
+          eval $(minikube docker-env)
+          ./gradlew buildDockerImages --parallel
+          ./gradlew :test:test

.gitignore

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 # Ignore Gradle build output directory
 build
+
+.idea
+.vscode

README.md

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-# kuberesolver
+# kuberesolver-java
 Kuberesolver for Java

integration/app/Dockerfile

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+FROM gradle:8.5.0-jdk21 AS build
+
+WORKDIR /kuberesolver/
+COPY ../../ ./
+
+WORKDIR /kuberesolver/integration/app
+RUN gradle :app:shadowJar
+
+FROM eclipse-temurin:21-jre AS client
+
+WORKDIR /app
+COPY --from=build /kuberesolver/integration/app/build/libs/app-all.jar app.jar
+ENTRYPOINT ["java", \
+            "--add-opens", "java.base/jdk.internal.misc=ALL-UNNAMED", \
+            "-cp", "app.jar", \
+            "io.github.lothar1998.kuberesolver.integration.app.Client", \
+            "--target", "kubernetes:///server", \
+            "--port", "50052" \
+]
+
+FROM eclipse-temurin:21-jre AS server
+
+WORKDIR /app
+COPY --from=build /kuberesolver/integration/app/build/libs/app-all.jar app.jar
+ENTRYPOINT ["java", \
+            "--add-opens", "java.base/jdk.internal.misc=ALL-UNNAMED", \
+            "-cp", "app.jar", \
+            "io.github.lothar1998.kuberesolver.integration.app.Server", \
+            "--port", "50051" \
+]

integration/app/build.gradle

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+plugins {
+    id 'application'
+    id 'com.google.protobuf' version '0.9.5'
+    id 'com.gradleup.shadow' version '8.3.6'
+}
+
+repositories {
+    mavenCentral()
+    mavenLocal()
+}
+
+application {
+    mainClass = ''
+}
+
+dependencies {
+    testImplementation libs.junit.jupiter
+    testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
+
+    compileOnly 'org.projectlombok:lombok:1.18.38'
+    annotationProcessor 'org.projectlombok:lombok:1.18.38'
+
+    implementation project(":lib")
+
+    if (JavaVersion.current().isJava9Compatible()) {
+        // Workaround for @javax.annotation.Generated
+        // see: https://github.com/grpc/grpc-java/issues/3633
+        implementation 'javax.annotation:javax.annotation-api:1.3.1'
+    }
+
+    implementation 'commons-cli:commons-cli:1.9.0'
+    implementation 'ch.qos.logback:logback-classic:1.5.18'
+    implementation 'com.google.protobuf:protobuf-java:4.30.2'
+    implementation 'io.grpc:grpc-protobuf:1.72.0'
+    implementation 'io.grpc:grpc-stub:1.72.0'
+    implementation 'io.grpc:grpc-netty-shaded:1.72.0'
+    implementation 'io.projectreactor.netty:reactor-netty-http:1.2.5'
+    implementation 'com.fasterxml.jackson.core:jackson-databind:2.18.3'
+
+    protobuf files("proto/")
+}
+
+java {
+    toolchain {
+        languageVersion = JavaLanguageVersion.of(17)
+    }
+}
+
+protobuf {
+    protoc {
+        artifact = 'com.google.protobuf:protoc:4.30.2'
+    }
+    plugins {
+        grpc {
+            artifact = 'io.grpc:protoc-gen-grpc-java:1.72.0'
+        }
+    }
+    generateProtoTasks {
+        ofSourceSet('main').configureEach {
+            plugins {
+                grpc {}
+            }
+        }
+    }
+}
+
+shadowJar {
+    mergeServiceFiles()
+}
+
+def dockerfilePath = file("Dockerfile").absolutePath
+def dockerContext = rootProject.projectDir.absolutePath
+
+tasks.register('buildClientDockerImage', Exec) {
+    group = 'docker'
+    description = 'Builds Docker image for client target in integration app'
+    workingDir = dockerContext
+    commandLine 'sh', '-c', "docker build -f ${dockerfilePath} -t client --target client ${dockerContext}"
+}
+
+tasks.register('buildServerDockerImage', Exec) {
+    group = 'docker'
+    description = 'Builds Docker image for server target in integration app'
+    workingDir = dockerContext
+    commandLine 'sh', '-c', "docker build -f ${dockerfilePath} -t server --target server ${dockerContext}"
+}
+
+tasks.register('buildDockerImages') {
+    group = 'docker'
+    description = 'Builds both client and server Docker images'
+    dependsOn 'buildClientDockerImage', 'buildServerDockerImage'
+}

integration/app/proto/ip-service.proto

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+syntax = "proto3";
+option java_package = "io.github.lothar1998.kuberesolver.integration.app.ip";
+
+service IPService {
+  rpc WhatIsYourIP(IPRequest) returns (IPResponse);
+}
+
+message IPRequest {
+
+}
+
+message IPResponse {
+  repeated string ip_addresses = 1;
+}