How to publish a docker image to a private docker registry using Jenkins' blueocean?

Question

It seems that the syntax that is used in the pipeline plugin is incompatible with Blueocean. It looks like that the syntax is different as blueocean uses a declarative pipeline.

Example

http://fishi.devtail.io/weblog/2016/11/20/docker-build-pipeline-as-code-jenkins/

  stage ('Docker Build') {
    // prepare docker build context
    sh "cp target/project.war ./tmp-docker-build-context"

    // Build and push image with Jenkins' docker-plugin
    withDockerServer([uri: "tcp://<my-docker-socket>"]) {
      withDockerRegistry([credentialsId: 'docker-registry-credentials', url: "https://<my-docker-registry>/"]) {
        // we give the image the same version as the .war package
        def image = docker.build("<myDockerRegistry>/<myDockerProjectRepo>:${branchVersion}", "--build-arg PACKAGE_VERSION=${branchVersion} ./tmp-docker-build-context")
        image.push()
      }   
    }
}

results in:

WorkflowScript: 5: Unknown stage section "sh". Starting with version 0.5, steps in a stage must be in a steps block. @ line 5, column 1.
   stage ('Docker Build') {
   ^

Attempt to solve the issue

When a steps block was added the pipeline failed again:

WorkflowScript: 13: Method calls on objects not allowed outside "script" blocks. @ line 13, column 13.
               docker.withRegistry

score 6 · Accepted Answer · answered Sep 28 '17 at 12:45

You can try to use scripting syntax into the declarative pipeline. For some step there is no declarative syntax yet. I had the same problem trying to use the docker global variable as a step.

stage ('Docker Build') {
  steps {
    // prepare docker build context
    sh "cp target/project.war ./tmp-docker-build-context"

    // Build and push image with Jenkins' docker-plugin
    script {
      withDockerServer([uri: "tcp://<my-docker-socket>"]) {
        withDockerRegistry([credentialsId: 'docker-registry-credentials', url: "https://<my-docker-registry>/"]) {
            // we give the image the same version as the .war package
            def image = docker.build("<myDockerRegistry>/<myDockerProjectRepo>:${branchVersion}", "--build-arg PACKAGE_VERSION=${branchVersion} ./tmp-docker-build-context")
            image.push()
        }
      }
    }
  }
}

score 3 · Answer 2 · answered May 18 '18 at 13:42

Just avoid the docker DSL; it is incompatible with Declarative. Also avoid script blocks. Simply

withDockerServer([uri: "tcp://<my-docker-socket>"]) {
  withDockerRegistry([credentialsId: 'docker-registry-credentials', url: "https://<my-docker-registry>/"]) {
    sh '''
      docker build -t whatever .
      docker push whatever
      # or better, put all this stuff into a versioned Bash/Python/etc. script
    '''
  }
}

score 1 · Answer 3 · answered Sep 27 '17 at 10:07

1

There seems to be an open issue at the moment. Another user experienced the same issue as well and added the following comment:

why is there a difference between node context and stage context

answered Sep 27 '17 at 10:07

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How to publish a docker image to a private docker registry using Jenkins' blueocean?

3 Answers3