Jenkinsci/BlueOcean in Docker using Docker Agent

[Theo W]

Hi all,

I'm running Jenkinsci/Blueocean official image in Docker, and wanted to try using Docker agent in the Declarative Pipeline to start up a gradle container to build the project.

Simple Jenkinsfile as follows:

pipeline {

  agent none

  stages {

    stage('Gradle Build') {

      agent {

          docker {

              image 'gradle:latest'

              args '--rm -v "$PWD":/home/gradle/project -w /home/gradle/project gradle gradle build'

          }

      }

      steps {

        echo 'Hello World'

        echo 'List contents of build directory'

        sh 'ls build'

      }

    }

  }

}

However when executing the pipeline, I see the following log:

[Pipeline] sh

[axpertws-pipe_master-VTRKBPYSKQ2MHDGNJKOHZQ5MPD647OIFZT2MTGW5LI77EO6KMC5A] Running shell script

+ docker inspect -f . gradle:latest

Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?

[Pipeline] sh

[axpertws-pipe_master-VTRKBPYSKQ2MHDGNJKOHZQ5MPD647OIFZT2MTGW5LI77EO6KMC5A] Running shell script

+ docker pull gradle:latest

Warning: failed to get default registry endpoint from daemon (Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?). Using system default: https://index.docker.io/v1/

Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?

My question is is the jenkinsci/blueocean image supposed to support Docker agents out of the box or do we need to use it as a base image to come up with customized solution such as bind mounting the host docker socket, etc ?

Thanks