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.
Why does Jenkins need Docker?
The main reason is that Jenkins pipelines work really well with Docker. Without Docker you need to install additional tools and add different agents to Jenkins. With Docker, there is no need to install additional tools, you just use images of these tools.
Is there a plugin for Docker in Jenkins?
Jenkins plugin which allows building, testing, and using Docker images from Jenkins Pipeline projects. A full description is available in the plugin’s documentation. The plugin has an outdated Docker-based demo. See the demo README from v1.12 for setup and launch guidelines.
Where can I find the Docker Pipeline plugin?
See https://github.com/jenkinsci/docker-workflow-plugin/pull/149#issuecomment-451305522 and https://groups.google.com/d/msg/jenkinsci-dev/k13SfZcBWVg/iQghmCQrEAAJ If are a user of the Docker Traceability plugin you need to call this Step manually during the build. The mentioned limitations will limit the useability of this step for this purpose.
Which is an example of combining Docker and pipeline?
For example, a repository might have both a Java-based back-end API implementation and a JavaScript-based front-end implementation. Combining Docker and Pipeline allows a Jenkinsfile to use multiple types of technologies by combining the agent {} directive, with different stages.
How is implicit call used in Docker pipeline?
Normally used implicitly by method calls on the docker global variable. Takes an image ID or symbolic name which must already have been pulled locally and starts a container based on that image. Runs all nested sh steps inside that container. The workspace is mounted read-write into the container.