pushing docker image to Docker hub in a shell script using Jenkins

Question

I am getting error pushing the docker image:

denied: requested access to the resource is denied

unauthorized: authentication required


script returned exit code 1

The Jenkinsfile stage:

        stage('upload docker') {
            steps {
                sh "./upload_docker.sh"
            }
        }

In the upload_docker file:

docker push username/repo:3

I added the user to the docker group.

I added Jenkins to the docker group.

I added Jenkins to the user group and vice versa.

I changed the permission of the docker config file to allow all.

Answer 1

You need to login to docker hub before you can push your image to it.

Answer 2

In order to push docker image to a private registry, you will need to:

1. Install docker-workflow plugin.
2. Create Username/password credential.
3. Wrap your code to push to docker registry like

docker.withRegistry('https://registry.example.com', 'credentials-id') {

    def customImage = docker.build("my-image:${env.BUILD_ID}")

    /* Push the container to the custom Registry */
    customImage.push()
}

Reference from Jenkins docs