Jenkins Image

Jenkins and Docker client

Usage

1. Clone the repository in the host machine
2. Build the image:

docker build -t jenkins-docker .

3. Start the container:

docker run -p 8080:8080 -p 50000:50000 -v /var/jenkins_home:/var/jenkins_home -v /var/run/docker.sock:/var/run/docker.sock --name jenkins -d jenkins-docker

4. Enter the container to verify that docker is accessible:

docker exec -it jenkins bash

5. Test

docker ps -a 

See the troubleshooting section If you get the following error:

Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock:

Troubleshooting

The Dockerfile is adding a docker GID:

groupadd -g 999 docker && \

Run the following command to figure out the GID on the host machine:

cat /etc/group | grep docker

# output
docker:x:998:

change the Dockerfile to use 998 instead of 999 and rebuild the image in the host machine.

As a last resort
Run the following command to allow the whole system to write to the docker socket (which is not recommended for production setups, but just to get started).

chmod o+rw /var/run/docker.sock 

Rerun the image.