Docker workshop

Highlights

• This is a workshop. Please come with a laptop that has the necessary installed software.
• Don't let the length of this document intimidate you :)
• Please follow all of the installation instructions in this document before coming to the workshop. Debugging docker/git installation takes time away from all attendees.

Installation

You will need 2 things installed

• Docker
• Git

Optionally, a good text editor. I highly recommend VS Code with the Docker Extension.

Docker installation

• For modern OS'es you can find download instructions here

There are two items of note

• Please treat this installation like any other. Different operating systems and different set ups (especially in company-issued laptops) can make this installation tricky. Google, and perhaps your desktop support team (if using a company-issued laptop) are your friends. Debugging this can be tricky.
• Docker requires a slew of permissions to run. So please make sure you grant Docker all the permissions it needs

Testing your installation

> docker -v
Docker version 20.10.2, build 2291f61

Warm up your engines!

You want to do this BEFORE you show up for the workshop!! Running this over a hotel wifi connection might not go well. Using the command (bash) prompt:

docker image pull alpine:3.17;
docker image pull ubuntu:21.04;
docker image pull ubuntu:22.04;
docker image pull jenkins/jenkins:2.60.3-alpine;
docker image pull nginx:1.19.6-alpine;
docker image pull openjdk:11.0.5-jre;

The final test

Once again, at the command prompt:

> docker container run --rm -d --name myjenkins -p 8080:8080 jenkins/jenkins:2.60.3-alpine;
> docker logs -f myjenkins;

You should see the Jenkins logs flowing by eventually settling with the following:

Running from: /usr/share/jenkins/jenkins.war
webroot: EnvVars.masterEnvVars.get("JENKINS_HOME")
Apr 03, 2023 11:26:01 PM Main deleteWinstoneTempContents
WARNING: Failed to delete the temporary Winstone file /tmp/winstone/jenkins.war
Apr 03, 2023 11:26:01 PM org.eclipse.jetty.util.log.JavaUtilLog info
INFO: Logging initialized @481ms
Apr 03, 2023 11:26:01 PM winstone.Logger logInternal
INFO: Beginning extraction from war file
Apr 03, 2023 11:26:02 PM org.eclipse.jetty.util.log.JavaUtilLog warn
WARNING: Empty contextPath
# truncated for brevity

Visit http://localhost:8080 and see if you see the Jenkins login page. If you do, you are all set to go!!

# ctrl-c to break out of the logs
docker container stop myjenkins;

Woot!!! See you soon!!!