Jenkins + Github Web Hook

1. Jenkins
   1. k8s jenkins
   2. ngrok

Jenkins

k8s jenkins

1. Find a jenkins pod w/ k8s pod, jenkins namespace

kubectl get pod -n jenkins

NAME                       READY   STATUS    RESTARTS      AGE
jenkins-6846f7864d-s92t8   1/1     Running   1 (22m ago)   41m

1. Login to jenkins pod

kubectl -n jenkins exec -it jenkins-6846f7864d-s92t8 -- /bin/bash

1. create a ssh key-pair (privae, public)

jenkins@jenkins-6846f7864d-s92t8:/$
jenkins@jenkins-6846f7864d-s92t8:/$ cd /var/jenkins_home
jenkins@jenkins-6846f7864d-s92t8:/$ mkdir .ssh
jenkins@jenkins-6846f7864d-s92t8:/$ cd .ssh
jenkins@jenkins-6846f7864d-s92t8:/$ ssh-keygen -t rsa -b 4096 -C test-key -f github_jenkins
Generating public/private rsa key pair.
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in github_jenkins
Your public key has been saved in github_jenkins.pub
The key fingerprint is:
SHA256:NJmTn59EOKF/7oLbcUqh1PCJUZ2f82tGL4t7bT8JEKg test-key
The key's randomart image is:
+---[RSA 4096]----+
|          +. .   |
|         B +o    |
|        % o o. . |
|       E @ *  +  |
|        S O +  o |
|       . . * o ..|
|        ..o = o.+|
|        .o.= .o*+|
|        ..o.+o+++|
+----[SHA256]-----+

jenkins@jenkins-6846f7864d-s92t8:~/.ssh$ ls
github_jenkins  github_jenkins.pub

1. Register SSH key (public key) to Github Repositories

   • Goto github repositories (https://github.com/pushdown99/jenkins-test)
   • Settings > General/Security/Deploy keys => [Add deploy key]
   • Deploy keys/Add new => Title: github_jenkins, Key: (cat ithub_jenkins.pub) => [Add key]

2. Register SSH key (private key) to Jenkins Credentials

   • Goto Jenkins dashboard (ex: http://127.0.0.1:4377)
   • Dashboard > + New Item => New Item / Name: github_jenkins Type: Freestyle project
   • Dashboard > Name: github_jenkins => Source code management => Git/Repository URL: git@github.com:pushdown99/jenkins-test.git, Credentials/ Add: Jenkins => Kind: SSH Username with private key, Username: github_jenkins, Private key/Enterdirectly: (cat ithub_jenkins) => [Add]

3. Build Trigger

   • Build Trigger / [v] Github hook trigger for GITScm polling

4. Plugin Installation

   • Jenkins Management > Plugins > Available plugins > GitHub Integration Plugin : Install

5. Ngrok Installation (optional: localhost)

choco install ngrok
ngrok config add-authtoken 46WbJVNrQ1pdq1mkbHAxT_ (API secret)
ngrok http 4377

Forwarding  https://4895-220-76-193-80.ngrok-free.app -> http://localhost:4377            

1. Setting for Github Repository Webhook

   • Goto github repositories (https://github.com/pushdown99/jenkins-test)
   • Settings > General/Code and automation/Webhooks => Payload URL: https://4895-220-76-193-80.ngrok-free.app/github-webhook/, Conntent type: application/json, [v] Just the push event, [v] Active => []Update webhook]

ngrok