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

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

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

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>com.baeldung</groupId>
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<artifactId>single-module-caching</artifactId>
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<properties>
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<maven.compiler.source>8</maven.compiler.source>
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<maven.compiler.target>8</maven.compiler.target>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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<guava.version>31.1-jre</guava.version>
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</properties>
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‎docker-modules/docker-compose-2/README.md‎

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## Relevant Articles:

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

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FROM alpine:latest
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MAINTAINER baeldung.com
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RUN apk update && apk add iputils && apk add bash && apk add curl

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

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FROM node:8.16.1-alpine
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WORKDIR /app
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COPY host_docker_internal/package.json /app
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COPY host_docker_internal/index.js /app
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RUN npm install
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CMD node index.js
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EXPOSE 8080

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

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services:
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alpine-app-1:
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container_name: alpine-app-1
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image: alpine-app-1
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build:
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context: ..
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dockerfile: Dockerfile
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tty: true
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ports:
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- 8081:8081
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alpine-app-2:
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container_name: alpine-app-2
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image: alpine-app-2
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build:
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context: ..
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dockerfile: Dockerfile
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tty: true
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ports:
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- 8080:8080

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

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

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

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

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

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

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

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

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