After installing kubernetes-plugin for Jenkins
- Go to Manage Jenkins | Bottom of Page | Cloud | Kubernetes (Add kubenretes cloud)
- Fill out plugin values
- Name: kubernetes
- Kubernetes URL: https://kubernetes.default:443
- Kubernetes Namespace: jenkins
- Credentials | Add | Jenkins (Choose Kubernetes service account option & Global + Save)
- Test Connection | Should be successful! If not, check RBAC permissions and fix it!
- Jenkins URL: http://jenkins
- Tunnel : jenkins:50000
- Apply cap only on alive pods : yes!
- Add Kubernetes Pod Template
- Name: jenkins-slave
- Namespace: jenkins
- Service Account: jenkins
- Labels: jenkins-slave (you will need to use this label on all jobs)
- Containers | Add Template
- Name: jnlp
- Docker Image: /jenkins-slave
- Command to run :
- Arguments to pass to the command:
- Allocate pseudo-TTY: yes
- Add Volume
- HostPath type
- HostPath: /var/run/docker.sock
- Mount Path: /var/run/docker.sock
- Timeout in seconds for Jenkins connection: 300
- Save
To run docker commands inside a jenkins agent you will need a custom jenkins agent with docker-in-docker working.
Take a look and build the docker file in ./dockerfiles/
NOTES:
1. Update base image used in Jenkins slave Dockerfile to jdk >= 14 compatible with Jekins version (image: jenkins/jenkins:2.401.1-lts-alpine)
2. Build image <docker-id>/jenkins-slave
Push it to a registry and use it instead of above configured * Docker Image: jenkins/jnlp-slave
If you do not use the custom image, the below pipeline will not work because default * Docker Image: jenkins/jnlp-slave public image does not have docker ability.
- Add a Jenkins Pipeline
node('jenkins-agent-1') {
stage('unit-tests') {
sh(script: """
docker run --rm alpine /bin/sh -c "echo hello world"
""")
}
}
For running Jenkins on AMAZON, start here