About

This repository contains code for my portfolio web pplication.

This projects builds a Jenkins CI pipeline. Every time I commit changes to this repository. Jenkins will build the docker image of my web application, push it to a docker repository that is being hosted on Sonatype Nexus, and update the version of the web application in the GitHub.

Read this blog for a better understanding of this project.

OS

• use any Ubuntu version for the host server machine.

Firewall config of nexus-server droplet:

• port 22 : ssh - add only your device's ip address
• port 8081: nexus - this is where your nexus application will run
• port 8082: docker repo - this is the IP add of the docker(hosted by Nexus) where we will store images

SSH into the server

• ssh root@<ipAddressServer>

Beautify your prompt

• echo 'PS1="\[\e]0;\u@\h: \w\a\]${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\$ "' >> .bashrc && source .bashrc

Nexus Setup

Nexus Host Server

• Install docker on Nexus server: apt update -y && apt install docker.io -y

Run Nexus container:

• docker volume create --name nexus-data
• docker run -d -p 8081:8081 -p 8082:8082 --name nexus -v nexus-data:/nexus-data sonatype/nexus3

Firewall config of jenkins-server droplet:

• port 22 : ssh - add only your device's ip address
• port 8080: jenkins - this is where your jenkins application will run

Create Blob Store

Create a storage where all the components of your docker repository will be stored.

Created a docker hosted repo

Create a docker(hosted) repository and assign port 8082 to it.

Create Role

Create a role. Provide this role access to the docker repo.

Create User

Create a user. Assign this user the role that you just created.

Jenkins setup

Jenkins Host Server

• Install docker on Jenkins server: apt update -y && apt install docker.io -y

Run Jenkins container:

• docker run -d -p 8080:8080 -p 5000:5000 -v jenkins_home:/var/jenkins_home -v /usr/bin/docker:/usr/bin/docker -v /var/run/docker.sock:/var/run/docker.sock --name jenkins jenkins/jenkins:lts-jdk11

Add docker repo hosted by Nexus to list of insecure regitries

• ssh into the jenkins-server as a root user.
• vi /etc/docker/daemon.json
  • Add {"insecure-registries": ["64.227.128.95:8082"]} to the daemon.json file. Create this file if it doesn't exist already. The IP address here is the address of the docker repo that you hosted on Nexus.
• Resart docker to reflect the changes:
  • systemctl daemon-reload
  • systemctl docker restart docker
  • Check whether the jenkins user in the jenkins container still has the permission to read /var/run/docker.sock file or not. If not, give the permission again.

Give read permission to the jenkins user for docker.sock file:

• docker exec -it -u 0 jenkins bash
• chmod 666 /var/run/docker.sock
• exit

Passwword to login into Jenkins as a admin

• This file can be accessed by root user as well
• docker exec -it jenkins bash
• cat /var/lib/jenkins/secrets/initialAdminPassword

Pipeline

• Create below creadentials IDs:
  1. github (git repository)
  2. dockerhub (artifact repository)

Trigger Jenkins pipeline

Github Webhooks

• Ad webhook in github
• <ipAddressOfHostServer>:<portNoOfJenkins>/github-webhook/
  • E.g.-> 143.110.184.204:8080/github-webhook/

Jenkins

• Add GitHub SCM trigger
• Add 'jenkins' user to the list of Polling ignores commits from certain users!