Monday, 7 May 2018

Jenkins on Kali 2017.1

Here's a quick run through of getting the Jenkins Pipeline demos working on Kali 2017.1 for testing purposes.

Install Docker

Add the Docker package certificate:
tim@kali:~$ curl -fsSL https://download.docker.com/linux/debian/gpg | sudo apt-key add -

If we try to use add-apt-respository we will get an error as Kali is not supported:
tim@kali:~$ sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/debian stretch stable"
aptsources.distro.NoDistroTemplateException: Error: could not find a distribution template for Kali/kali-rolling

We can instead manually add to /etc/apt/sources.list:
tim@kali:~$ sudo vi /etc/apt/sources.list
deb [arch=amd64] https://download.docker.com/linux/debian stretch stable
tim@kali:~$ sudo apt-get update
tim@kali:~$ sudo apt-get install docker-ce

Create users for services

We will be using key authentication or sudo so no need for passwords on the service accounts:
tim@kali:~$ sudo adduser --disabled-password git
tim@kali:~$ sudo adduser --disabled-password jenkins

We want Jenkins to be able to utilise Docker without having to be root:
tim@kali:~$ sudo adduser jenkins docker

Download and run Jenkins

When testing I prefer this method over the Debian package as it is all self-contained:
tim@kali:~$ sudo -u jenkins -i
jenkins@kali:~$ mkdir ~/jenkins && cd ~/jenkins
jenkins@kali:~/jenkins$ wget "http://mirrors.jenkins.io/war-stable/latest/jenkins.war"
jenkins@kali:~/jenkins$ java -jar jenkins.war --httpPort=8080

Set up Git remote

This will set up a repo you can access over SSH:
tim@kali:~$ sudo apt-get install git-core
tim@kali:~$ sudo systemctl start ssh
tim@kali:~$ sudo -u git -i
git@kali:~$ mkdir ~/.ssh ~/repo
git@kali:~$ chmod 0700 ~/.ssh
git@kali:~$ cd ~/repo
git@kali:~/repo$ git init --bare

Set up SSH keys

Create keys for your user and the Jenkins user and add to Git's authorized_keys file:
tim@kali:~$ sudo ssh-keygen
tim@kali:~$ sudo -u jenkins ssh-keygen
tim@kali:~$ cat ~/.ssh/id_rsa.pub | sudo -u git tee -a /home/git/.ssh/authorized_keys
tim@kali:~$ sudo -u jenkins cat /home/jenkins/.ssh/id_rsa.pub | sudo -u git tee -a /home/git/.ssh/authorized_keys

Set up local Git repo

Push your test Jenkinsfile to the remote repo:
tim@kali:~$ mkdir repo && cd repo
tim@kali:~/repo$ git init
tim@kali:~/repo$ vi Jenkinsfile
tim@kali:~/repo$ git add .
tim@kali:~/repo$ git commit
tim@kali:~/repo$ git remote add origin git@localhost:repo
tim@kali:~/repo$ git push --set-upstream origin master

You should now be able to successfully run the Pipeline demos here:
https://jenkins.io/doc/pipeline/tour/hello-world/

You can set the Git server in Jenkins as git@localhost:repo and it will work the same as a remote Git server (BitBucket etc).

As this is for testing purposes, if you reboot you'll have to start SSH and Jenkins again manually.

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