Do I need Docker to run Jenkins?
Jenkins setup Before we get started, you’ll need to install Docker on your machine. If you’re not sure how you can refer to this official documentation.
What is a Docker in Jenkins?
Docker is a platform for running applications in an isolated environment called a “container” (or Docker container). Applications like Jenkins can be downloaded as read-only “images” (or Docker images), each of which is run in Docker as a container.
How does Jenkins Docker work?
Whenever a Jenkins build requires Docker, it will create a “Cloud Agent” via the plugin. The agent will be a Docker Container configured to talk to our Docker Daemon. The Jenkins build job will use this container to execute the build and create the image before being stopped.
Is Docker similar to Jenkins?
The ultimate purpose of Docker and Jenkins is entirely different, so you cannot do compare it. Docker is a container engine that can create and manage containers, whereas Jenkins is a CI engine that can run build/test on your app. Docker is used to build and run multiple portable environments of your software stack.
How to run Jenkins in a docker container?
The Jenkins itself is not run in a container. What I want to do is simply call yarn install using a node image. So here is my Jenkinsfile: pipeline { agent any stages { stage (‘install node modules…’) { agent { docker ‘node’ } steps { sh ‘cd /path/to/package.json; yarn install’ } } } } Pretty straightforward, right?
What is an example of using a docker container?
This example can be taken further, utilizing two containers simultaneously. One “sidecar” running MySQL, and another providing the execution environment, by using the Docker container links. The above example uses the object exposed by withRun, which has the running container’s ID available via the id property.
How to install Jenkins on a Ubuntu machine?
I installed Jenkins on an Ubuntu 16.04 machine. The Jenkins itself is not run in a container. What I want to do is simply call yarn install using a node image. So here is my Jenkinsfile: pipeline { agent any stages { stage (‘install node modules…’) { agent { docker ‘node’ } steps { sh ‘cd /path/to/package.json; yarn install’ } } } }
Can a docker container have direct access to the Internet?
Just to make sure that indeed the docker container has direct access to the internet: Running the container connected to the host network solves the problem and lets jenkins access the internet: