CI/CD pipeline on a Raspberry Pi – Part 2
After we mainly took care of the setup and configuration in part 1, I would like to describe the installation of a build server on the Raspberry Pi in part 2 of the experiment. I chose Jenkins because Jenkins is open source and free, and the installation is relatively easy.
The installation of Jenkins
Please connect your Raspberry Pi via SSH and update the basic packages at the beginning. Simply enter the following commands into the console:
sudo apt-get update sudo apt-get upgrade
Confirm the respective requests with Enter.
Next, you need a Java installation, because Jenkins is based on it. I recommend you install OpenJDK – also due to current licensing problems with Oracle:
sudo apt install default-jdk
To test it, simply call up the appropriate version:
If you encounter a problem with the error message “Error: missing `server’ JVM at `/usr/lib/jvm/java-8-openjdk-armhf/jre/lib/arm/server/libjvm.so’.”, the following thread has helped me: https://www.raspberrypi.org/forums/viewtopic.php?t=197824
I executed the following commands, then it ran:
sudo mv /usr/lib/jvm/java-8-openjdk-armhf/jre/lib/arm/client /usr/lib/jvm/java-8-openjdk-armhf/jre/lib/arm/server sudo apt-get purge openjdk-8-jre-headless sudo apt-get install openjdk-8-jre-headless sudo apt-get install openjdk-8-jre sudo apt-get install default-jre sudo apt-get install default-jdk
Now the call of “java -version” should provide a successful version information and you can install Jenkins. To do this, provide another package source of Jenkins and install the server via the package manager:
wget -q -O - https://jenkins-ci.org/debian/jenkins-ci.org.key | sudo apt-key add - sudo sh -c 'echo deb http://pkg.jenkins-ci.org/debian binary/ > /etc/apt/sources.list.d/jenkins.list' sudo apt-get update sudo apt-get install jenkins –y
Now Jenkins should be installed and running. Please check this:
systemctl status jenkins.service
This command will output the status of the Jenkins service; the following should be in that order:
● jenkins.service - LSB: Start Jenkins at boot time Loaded: loaded (/etc/init.d/jenkins; generated; vendor preset: enabled) Active: active (exited) since Wed 2017-12-27 22:14:45 +08; 4min 40s ago Docs: man:systemd-sysv-generator(8) Dec 27 22:14:43 raspberrypi systemd: Starting LSB: Start Jenkins at boot time... Dec 27 22:14:43 raspberrypi jenkins: Correct java version found Dec 27 22:14:43 raspberrypi su: Successful su for jenkins by root Dec 27 22:14:43 raspberrypi su: + ??? root:jenkins Dec 27 22:14:43 raspberrypi su: pam_unix(su:session): session opened for user jenkins by (uid=0) Dec 27 22:14:45 raspberrypi jenkins: Starting Jenkins Automation Server: jenkins. Dec 27 22:14:45 raspberrypi systemd: Started LSB: Start Jenkins at boot time.
If this is the case, you can already open the Jenkins web interface from your computer via a browser: http://[ip-adresse-des-pi]:8080. If necessary, you may need a few seconds of patience until everything is loaded initially.
Getting Jenkins started
Next, you may unlock the Jenkins instance. To do this, select a special key and insert it in the input field accordingly:
You can get the contents of the file directly from the Raspberry Pi via SSH:
sudo cat /var/lib/jenkins/secrets/initialAdminPassword
Simply copy the issued key from the terminal into the input field and click on “Continue”.
The installation of the plugins
In the following screen please choose “install suggested plugins”. Jenkins will automatically install all plugins one after the other. This may take a few minutes.
Note: During my installation the installation of some plugins was highlighted as faulty. In Jenkins itself I couldn’t identify any problems, so don’t be confused: missing plugins can be installed later.
The initial user
Now enter the data for the initial user:
Now you should already see the main page of Jenkins, which is now completely set up:
And you’re done.
Part 3 of the experiment describes how to use the build server and create a build job. Will you be back as a part of it?
Here you can find the other parts of Peter Friedland’s series:
Software Consultant at t2informatik GmbH
Peter Friedland works at t2informatik GmbH as a software consultant. In various customer projects he develops innovative solutions in close cooperation with partners and local contact persons. And from time to time he also blogs.