Pushing Docker containers to more than one registry using Gradle

In the early days, we had to maintain two docker registries, one in AWS us-east-1 and the other in eu-west-1. This required us to build our containers and then push it to both registries. Below is a build.grade using Ben’s Gradle-Docker plugin to do the following:

1. Builds a docker container based on the Dockerfile in the root directory.
2. Tag and push to both repos (us-east-1 and eu-west-1).

The root directory (project folder) should contain your Dockerfile and build.gradle.

This is how the build.grade looks like:

	buildscript {
	repositories {
	jcenter()
	}
	dependencies {
	classpath 'com.bmuschko:gradle-docker-plugin:2.3.1'
	}
	}
	apply plugin: 'com.bmuschko.docker-remote-api'
	import com.bmuschko.gradle.docker.tasks.container.*
	import com.bmuschko.gradle.docker.tasks.image.*
	def dockerRepo = "dockerregistry.us-east-1.mycompany.net:7001/offline-pipeline-jenkins"
	def euDockerRepo = "dockerregistry.eu-west-1.mycompany.net:7001/offline-pipeline-jenkins"
	repositories {
	mavenCentral()
	}
	docker {
	if ("JENKINS_HOME" in System.env) {
	url = "unix:///var/run/docker.sock"
	} else {
	url = "http://192.168.59.103:2375"
	}
	}
	task buildImage(type: DockerBuildImage) {
	inputDir = file('.')
	tag = "${dockerRepo}"
	}
	task pushImage(type: DockerPushImage) {
	dependsOn buildImage
	imageName = "${dockerRepo}"
	tag = "latest"
	}
	task tagDocker(type: DockerTagImage) {
	dependsOn buildImage
	force = true
	imageId = buildImage.getTag()
	repository = "${euDockerRepo}"
	tag = "latest"
	}
	task pushImageToEu(type: DockerPushImage) {
	dependsOn tagDocker
	imageName = "${euDockerRepo}"
	tag = "latest"
	}
	task pushImages() {
	dependsOn pushImage, pushImageToEu
	}

view raw build.gradle hosted with ❤ by GitHub

Note that you can also build this on Jenkins.