CODEWITHSUNDEEP
mavendockerjenkinswindows-10jenkins-pipeline
dungmidside
dungmidside

Reputation: 518

Jenkins Pipeline - Cannot connect to the Docker daemon

I am following this tutorial to build a hello-world maven java app with jenkins in dockers: https://jenkins.io/doc/tutorials/building-a-java-app-with-maven/#fork-and-clone-the-sample-repository-on-github

This is my app (just fork form the tutorial): simple-java-maven-app

It has a small difference that I used remote repo (Github) not a local repo (or host repo) in Pipeline's option (Repository URL). I pushed Jenkinsfile to repo then build hello-world app with Pipeline.

// Jenkinsfile for Pipeline
pipeline {
    agent {
        docker {
            image 'maven:3-alpine' 
            args '-v /root/.m2:/root/.m2' 
        }
    }
    stages {
        stage('Build') { 
            steps {
                sh 'mvn -B -DskipTests clean package' 
            }
        }
    }
}

I got this error below and can not find any solution for it. I using Windows 10.

docker pull maven:3-alpine
Warning: failed to get default registry endpoint from daemon (Cannot connect to the Docker daemon. Is the docker daemon running on this host?). Using system default: https://index.docker.io/v1/
Cannot connect to the Docker daemon. Is the docker daemon running on this host?

Thanks everyone.

Upvotes: 2

Views: 5621

Answers (1)

Janshair Khan
Janshair Khan

Reputation: 2687

You are using Docker in Docker (DinD) which is not a recommended CI approach. You should mount your Host's Docker Daemon Socket as volume to the Jenkins container like:

docker container run -v /var/run/docker.sock:/var/run/docker.sock ...

So you can work with images & containers on your host machine rather than in the Jenkins container. Click Here to learn more.

Upvotes: 4

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