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    ¿How to configure an Agent jenkins/inbound-agent with docker installed?

    Posts: 3
    in LFS261 Class Forum

    To follow the course, I installed my jenkins with HELM in k8s.
    I am struggling to set up an Agent with docker installed.
    I want to set up this one https://github.com/jenkinsci/jnlp-agents/tree/master/docker
    https://hub.docker.com/r/jenkins/jnlp-agent-docker

    Anyone can help me to substitute jenkins/inbound-agent:4.11-1 for jenkins/jnlp-agent-docker so I can have docker in the Agent?

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    Best Answer

    • Posts: 139
      Answer ✓

      @Miguel_Angel have you considered using kubernetes agent which launches a pod (with jnlp embedded into it as a container in addition to actual job container).

      Here is a sample Jenkinsfile (created from my existing pipeline, not tested)

      FIle: Jenkinsfile

      1. pipeline {
      2.  
      3.   agent {
      4.     kubernetes {
      5.       yamlFile 'build-agent.yaml'
      6.       defaultContainer 'alpine'
      7.       idleMinutes 1
      8.     }
      9.   }
      10.   stages {
      11.     stage('Sample Stage') {
      12.       parallel {
      13.         stage('this runs in a pod') {
      14.           steps {
      15.             container('alpine') {
      16.               sh 'uptime'
      17.             }
      18.           }
      19.         }
      20.       }
      21.     }
      22.     }
      23. }

      If you use configure above you would also have to add build agent config in its own file. For example,

      file : build-agent.yaml

      1. apiVersion: v1
      2. kind: Pod
      3. metadata:
      4.   labels:
      5.     app: xyz
      6. spec:
      7.   containers:
      8.     - name: alpine
      9.       image: alpine
      10.       command:
      11.         - cat
      12.       tty: true
      13.  

      Let me know if this could help.

    Answers

    • Posts: 3

      more info.

      I created this pipeline
      pipeline {
      agent { label 'docker' }
      stages {
      stage('Run docker') {
      steps {
      sh 'docker version'
      }
      }
      }
      }

      I added this agent
      The agent

      pods get error
      ❯ k get po -n jenkins -w
      NAME READY STATUS RESTARTS AGE
      docker-5w0j0 1/2 Terminating 0 2s
      jenkins-0 2/2 Running 0 35m
      docker-5w0j0 0/2 Terminating 0 3s
      docker-bqp3z 0/2 Pending 0 0s
      docker-bqp3z 0/2 Pending 0 0s
      docker-bqp3z 0/2 ContainerCreating 0 0s
      docker-bqp3z 1/2 Error 0 1s
      docker-bqp3z 1/2 Terminating 0 1s
      docker-5w0j0 0/2 Terminating 0 11s
      docker-5w0j0 0/2 Terminating 0 11s
      docker-bqp3z 0/2 Terminating 0 3s
      docker-87ss1 0/2 Pending 0 0s
      docker-87ss1 0/2 Pending 0 0s
      docker-87ss1 0/2 ContainerCreating 0 0s
      docker-87ss1 1/2 Error 0 1s
      docker-87ss1 1/2 Terminating 0 1s

    • Posts: 3

      Thanks @gouravshah
      It was so easy to implement.
      It works great and clean and net solution

    • Posts: 139

      cool ! Thanks for the feedback @Miguel_Angel. Glad it helped.

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