Single Jenkinsfile, multiple architecture builds

[Roberto Aguilar]

Hello,

I have a Jenkins master (x86_64 linux) and a slave (armv7l linux).  I have labeled them "x86_64" and "arm" respectively.  I have a Pipeline build triggering on Git push, and I would like the Jenkinsfile in the repo to build on both machines.  I'm having trouble setting up my Jenkinsfile to do this.  My attempt errors out with the message:

```

ERROR: The ?stage? step must not be used inside a ?parallel? block.

```

The goal here is to:

- build two docker images; one for arm and x86_64

- keep from duplicating the build stages in two `node {}` definitions, hence attempting to call the build() in each node

- run the builds in parallel rather than having to wait for one to complete before starting the other

Any pointers on getting this to work.

Thank you.

My Jenkinsfile:

```

def build() {

   stage 'repository'

   checkout scm

   stage 'vars'

   def git_tag = sh(returnStdout: true, script: '''git describe --tags || exit 0''')

   def arch = sh(returnStdout: true, script: '''uname -m''')

   stage 'Docker'

   def docker_base="${env.gitlabSourceNamespace}/${env.gitlabSourceRepoName}"

   def git_branch = env.gitlabTargetBranch.split('/').last()

   def docker_tag = "${docker_base}:${git_branch}-${arch}"

   docker.withRegistry('https://registry.gitlab.com/', 'gitlab-docker-registry') {

     def docker_image = docker.build(docker_tag, '.')

     docker_image.push()

   }

}

parallel (

  'arm': {

    node('arm') {

      build()

    }

  },

  'x86_64': {

    node('linux') {

      build()

    }

  }

)

```

[Daniel Beck]

The error just tells you that you can't define stages within parallel, as there's no visualization for it -- it's strictly sequential. So remove the 'stage' statements from build() and it should be fine.

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[Roberto Aguilar]

Ah, perfect, works.

Thank you Daniel!

-Roberto.