[ BAEL-6068 ] - Communicating with Docker containers on the same machine (#13343)

* fix: build clean up

* feat: add docker compose 2 module, add communication same machine docker compose

* fix: remove unused package lock file

docker-modules/docker-caching/multi-module-caching/pom.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0"
-    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
     <groupId>com.baeldung</groupId>
     <artifactId>multi-module-caching</artifactId>
@@ -25,6 +25,7 @@
     </dependencyManagement>
 
     <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <java.version>1.8</java.version>
         <guava.version>31.1-jre</guava.version>
     </properties>

docker-modules/docker-caching/single-module-caching/pom.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0"
-    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
     <groupId>com.baeldung</groupId>
     <artifactId>single-module-caching</artifactId>
@@ -48,6 +48,7 @@
     <properties>
         <maven.compiler.source>8</maven.compiler.source>
         <maven.compiler.target>8</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <guava.version>31.1-jre</guava.version>
     </properties>
 

docker-modules/docker-compose-2/README.md

@@ -0,0 +1 @@
+## Relevant Articles:

docker-modules/docker-compose-2/communication_same_machine/Dockerfile

@@ -0,0 +1,3 @@
+FROM alpine:latest
+MAINTAINER baeldung.com
+RUN apk update && apk add iputils && apk add bash && apk add curl

docker-modules/docker-compose-2/communication_same_machine/Dockerfile.node

@@ -0,0 +1,7 @@
+FROM node:8.16.1-alpine
+WORKDIR /app
+COPY host_docker_internal/package.json /app
+COPY host_docker_internal/index.js /app
+RUN npm install
+CMD node index.js
+EXPOSE 8080

docker-modules/docker-compose-2/communication_same_machine/dns/docker-compose.yml

@@ -0,0 +1,20 @@
+services:
+  alpine-app-1:
+    container_name: alpine-app-1
+    image: alpine-app-1
+    build:
+      context: ..
+      dockerfile: Dockerfile
+    tty: true
+    ports:
+      - 8081:8081
+  
+  alpine-app-2:
+    container_name: alpine-app-2
+    image: alpine-app-2
+    build:
+      context: ..
+      dockerfile: Dockerfile
+    tty: true
+    ports:
+      - 8080:8080

docker-modules/docker-compose-2/communication_same_machine/host_docker_internal/docker-compose.yml

@@ -0,0 +1,29 @@
+services:
+  alpine-app-1:
+    container_name: alpine-app-1
+    extra_hosts: # for linux hosts since version 20.10
+      - host.docker.internal:host-gateway
+    build:
+      context: ..
+      dockerfile: Dockerfile
+    image: alpine-app-1
+    tty: true
+    networks:
+      - first-network
+
+  node-app:
+    container_name: node-app
+    build:
+      context: ..
+      dockerfile: Dockerfile.node
+    image: node-app
+    ports:
+      - 8080:8080
+    networks:
+      - second-network
+
+networks:
+  first-network:
+    driver: bridge
+  second-network:
+    driver: bridge

docker-modules/docker-compose-2/communication_same_machine/host_docker_internal/index.js

@@ -0,0 +1,10 @@
+var express = require('express')
+var app = express()
+
+app.get('/', function (req, res) {
+    res.send('Hello World!')
+})
+
+app.listen(8080, function () {
+    console.log('app listening on port 8080!')
+})

docker-modules/docker-compose-2/communication_same_machine/host_docker_internal/package.json

@@ -0,0 +1,14 @@
+{
+  "name": "host_docker_internal",
+  "version": "1.0.0",
+  "description": "node js app",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "Baeldung",
+  "license": "ISC",
+  "dependencies": {
+    "express": "^4.18.2"
+  }
+}

docker-modules/docker-compose-2/communication_same_machine/static_ip_bridge/docker-compose.yml

@@ -0,0 +1,34 @@
+services:
+  alpine-app-1:
+    container_name: alpine-app-1
+    build:
+      context: ..
+      dockerfile: Dockerfile
+    image: alpine-app-1
+    tty: true
+    ports:
+      - 8080:8080
+    networks:
+      network-example:
+        ipv4_address: 10.5.0.2
+
+  alpine-app-2:
+    container_name: alpine-app-2
+    build:
+      context: ..
+      dockerfile: Dockerfile
+    image: alpine-app-2
+    tty: true
+    ports:
+      - 8081:8081
+    networks:
+      network-example:
+        ipv4_address: 10.5.0.3
+
+networks:
+  network-example:
+    driver: bridge
+    ipam:
+      config:
+        - subnet: 10.5.0.0/16
+          gateway: 10.5.0.1

docker-modules/docker-compose-2/communication_same_machine/static_ip_macvlan/docker-compose.yml

@@ -0,0 +1,36 @@
+services:
+  alpine-app-1:
+    container_name: alpine-app-1
+    build:
+      context: ..
+      dockerfile: Dockerfile
+    image: alpine-app-1
+    tty: true
+    ports:
+      - 8080:8080
+    networks:
+      network-example:
+        ipv4_address: 192.168.2.2
+
+  alpine-app-2:
+    container_name: alpine-app-2
+    build:
+      context: ..
+      dockerfile: Dockerfile
+    image: alpine-app-2
+    tty: true
+    ports:
+      - 8081:8081
+    networks:
+      network-example:
+        ipv4_address: 192.168.2.3
+
+networks:
+  network-example:
+    driver: macvlan
+    driver_opts:
+      parent: enp0s3
+    ipam:
+      config:
+        - subnet: 192.168.2.0/24
+          gateway: 192.168.2.1

docker-modules/docker-compose-2/pom.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>docker-compose-2</artifactId>
+    <description>Demo project for Spring Boot and Docker - Module docker-compose-2</description>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-boot-2</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+        <relativePath>../../parent-boot-2</relativePath>
+    </parent>
+
+</project>

docker-modules/pom.xml

@@ -18,6 +18,7 @@
     <modules>
         <module>docker-caching</module>
         <module>docker-compose</module>
+        <module>docker-compose-2</module>
         <module>docker-containers</module>
         <module>docker-images</module>
         <module>docker-spring-boot</module>