[FIXED] How to configure Jenkins job to build with Docker?

Issue

I'm attempting to build a branch using Jenkins and a 'docker in the docker' container to build a container from src.

I define the Docker cloud instance here:

Should an extra tab be available that enable the job to use the Docker cloud instance setup above?

The job is a multi-branch pipeline:

But when I attempt to configure a job that uses the docker cloud instance, configured above, the option to build with docker is not available:

The build log contains:

time="2021-04-04T14:27:16Z" level=error msg="failed to dial gRPC: cannot connect to the Docker daemon. Is 'docker daemon' running on this host?: dial unix /var/run/docker.sock: connect: no such file or directory" error during connect: Post http://%2Fvar%2Frun%2Fdocker.sock/v1.40/build?buildargs=%7B%7D&cachefrom=%5B%5D&cgroupparent=&cpuperiod=0&cpuquota=0&cpusetcpus=&cpusetmems=&cpushares=0&dockerfile=Dockerfile&labels=%7B%7D&memory=0&memswap=0&networkmode=default&rm=1&session=vgpahcarinxfh05klhxyk02gg&shmsize=0&t=ron%2Fml-services&target=&ulimits=null&version=1: context canceled [Pipeline] } [Pipeline] // stage [Pipeline] } [Pipeline] // node [Pipeline] End of Pipeline [Bitbucket] Notifying commit build result [Bitbucket] Build result notified ERROR: script returned exit code 1 Finished: FAILURE

which suggests the build is searching for Docker on the same host as Jenkins, but I'm attempting to build with Docker on a different host?

Have I configured Docker with Jenkins correctly?

My Jenkinsfile contains:

node {
      def app
      stage('Clone repository') {
            checkout scm
      }
      stage('Build image') {
            app = docker.build("ron/services")
       }
       stage('Push image') {
      docker.withRegistry('https://registry.hub.docker.com', 'git') {
       app.push("${env.BUILD_NUMBER}")
       app.push("latest")
              }
           }
        }

Update:

Clicking the checkmark at Expose DOCKER_HOST , rebuilding contains error:

+ docker build -t ron/services .
Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?
[Pipeline] }
[Pipeline] // stage
[Pipeline] }
[Pipeline] // node
[Pipeline] End of Pipeline
[Bitbucket] Notifying commit build result
[Bitbucket] Build result notified
ERROR: script returned exit code 1
Finished: FAILURE

Solution

The docker cli tries to connect using the docker socket in /var/run. This means that no external daemon is configured, for example using the environment variable DOCKER_HOST. Try clicking the checkmark at Expose DOCKER_HOST.

Answered By - Thomas