How to include Jenkins build numbers to docker images build via CI

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I am creating a Jenkins pipeline for building multiple microservices and to create docker images and push them to a private Docker registry.

The docker images are created via Gradle build via docker plugin and I am even able to push the images.

I need help with the following questions.

  1. When the images are built via Jenkins how to tag images to a specific Jenkins build? In other words, I would want to maintain the docker images for each build and deliver the docker images belong to a specific build to QA based on build #.
  2. If multiple images are maintained, how do I conditionally prune the obsolete images? Say, I want to clean up the images of last 10 build but would want to keep the images of the build which is tagged with a release or milestone.

Use %BUILD_NUMBER% in windows and ${BUILD_NUMBER} in linux

You can do like mentioned below. eg: docker build -t image-name:%BUILD_NUMBER%

Docker tutorial : Build Docker images using Jenkins, Whenever a Jenkins build requires Docker, it will create a “Cloud Agent” via the When calling docker build we use the Jenkins build number as the image tag. docker tag jenkins-demo:${BUILD_NUMBER} jenkins-demo:latest docker images. The first command lists all the files in the directory which will be built. When calling docker build we use the Jenkins

1- For the tagging purpose you can use jenkin environment variables like BUILD_NUMBER

For detail check following link : https://wiki.jenkins.io/display/JENKINS/Building+a+software+project

2- For maintaining max number of images that you want to hold in the docker registry depends on the provider.

For example : Artifactory from jFrog https://www.jfrog.com/confluence/display/RTF/Docker+Registry

Set Max Unique Tags. This specifies the maximum number of unique tags, per repository, that should be stored for a Docker image. Once the number of tags for an image exceeds this number, older tags will be removed. Leaving the field blank (default) means all tags will be stored.

Using Docker with Pipeline, Many organizations use Docker to unify their build and test environments across machines, Starting with Pipeline versions 2.5 and higher, Pipeline has built-in support for Pipeline is designed to easily use Docker images as the execution by withRun , which has the running container's ID available via the id property. ls docker info docker build -t jenkins-demo:${BUILD_NUMBER} . docker tag jenkins-demo:${BUILD_NUMBER} jenkins-demo:latest docker images. The first command lists all the files in the directory which will be built. When calling docker build we use the Jenkins build number as the image tag. This allows us to version our Docker Images.

Basically, Jenkins exposes BUILD_NUMBER env variable, we can simply read it in the gradle file like below and use the same to name the docker images

    buildscript {
        ext {
            springBootVersion = "2.1.3.RELEASE"
            dependencyManagementVersion = "1.0.7.RELEASE"
            gradleDockerVersion = "0.13.0"
            spotBugsVersion = "1.7.1"
            guavaVersion = "27.0.1-jre"
            nodeVersion = "1.3.1"
            buildNumber = System.getenv("BUILD_NUMBER")!=null? System.getenv("BUILD_NUMBER") : "latest"
        }
    .....
    .....
    .....
}

Building Docker Images using Jenkins | Jenkins, Learn how to configure Jenkins to build Docker Images. Learn Launch Jenkins, Configure Docker Plugin, Add Docker Agent, Create Build Project, Build Project, View Console Output, via you can use Docker within a CI/CD pipeline, using Images as a build artefact You should see the Docker version number returned . Building the first docker image: With dockerhub credential and repository created, the jenkins can send the docker image build to dockerhub (our docker repository). In this example, let’s build a node.js application. We need a Dockerfile to the build. Create a new step in pipeline to clone a git repository that has a Dockerfile inside.

Building your first Docker image with Jenkins 2: Guide for developers, They can add a layer of complexity and instability to an otherwise stable application. To build and run the Docker image locally: Mac OS X or Linux, and Docker installed refer to https://wiki.jenkins-ci.org/display/JENKINS/Installing+ Jenkins. the image with two tags: * First, the incremental build number from Jenkins� In this scenario you'll learn how to configure Jenkins to build Docker Images based on a Dockerfile. The scenario is designed to demostrate how you can use Docker within a CI/CD pipeline, using Images as a build artefact that can be promoted to different environments and finally production.

Automate Docker Image Versioning with Jenkins, Subscribe to Blog via Email Versioning your Docker images is a good practice that will make them For this tutorial, we will use Jenkins as our CI technology, but the Now that we have a versioned image, we need to make Jenkins build and push the + versions[1]; def patch = version.trim(); docker. Recently I wanted to do an automated deployment of Docker Images to docker server and tried using docker-plugin but after spending some time it looked to me that if it asking for too much of information and for each operation you need to provide arguments, I would prefer a solution which is more dynamic and picks things automatically with user providing the bare essentials parameters arguments.

Now that we have a working Jenkins server, let’s set up the job which will build our Docker images. Click on “create new jobs”, give your job a name and select the “Pipeline” type of job. In the job configuration, go down to the “Pipeline” section and choose “Pipeline script from SCM”.

Comments
  • 1. You mean add BUILD_NUMBER as image TAG?
  • Yes, Use BUILD_NUMBER as an environment variable to TAG your images.