Jenkins_Documentation

METHOD 1

Downloading and installing Jenkins on Amzon Linux Machine

(sudo date -s "2023-06-12 03:28:00")

Switch to root user

sudo su -

Ensure that your software packages are up to date on your instance by using the following command to perform a quick software update:

yum update –y

Add the Jenkins repo using the following command:

wget -O /etc/yum.repos.d/jenkins.repo \
    https://pkg.jenkins.io/redhat-stable/jenkins.repo

Import a key file from Jenkins-CI to enable installation from the package:

rpm --import https://pkg.jenkins.io/redhat-stable/jenkins.io-2023.key
 

Upgrade

yum upgrade -y

Install Java (Amazon Linux 2):

amazon-linux-extras install java-openjdk11 -y

Install maven ,Docker & docker-compose

yum install maven -y
wget http://mirror.olnevhost.net/pub/apache/maven/maven-3/3.2.5/binaries/apache-maven-3.2.5-bin.tar.gz
tar xzf apache-maven-3.2.5-bin.tar.gz
sudo mv apache-maven-3.2.5 /opt/
export PATH=/opt/apache-maven-3.2.5/bin:$PATH
source ~/.bashrc
yum install -y docker
systemctl start docker 
systemctl enable docker
curl -L "https://github.com/docker/compose/releases/latest/download/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
chmod +x /usr/local/bin/docker-compose
yum install git -y

Install Jenkins:

yum install jenkins -y

Enable the Jenkins service to start at boot:

systemctl enable jenkins

Add the Jenkins user to the docker group:

sudo usermod -aG docker jenkins

Sometimes we may need to execute these commands to give docker permisiions

sudo chown jenkins:docker /var/run/docker.sock
sudo chmod 660 /var/run/docker.sock

Start Jenkins as a service:

systemctl start jenkins

You can check the status of the Jenkins service using the command:

systemctl status jenkins

To check Admin password

cat /var/lib/jenkins/secrets/initialAdminPassword

<><>><> THAT'S IT YOU CAN START USING JENKINS RIGHT AWAY <><><><>

(For Remote Machine) Configure Docker to listen on a specific IP address and port:

open the Docker configuration file

sudo vi /etc/sysconfig/docker

Find the line that starts with OPTIONS= and add the following flags to the end of the line:

OPTIONS="-H tcp://172.31.93.144:2375 -H unix:///var/run/docker.sock"

restarts the Docker service

sudo service docker restart

open the .bashrc file

vi ~/.bashrc

Add the following line at the end of the file:

export DOCKER_HOST='tcp://172.31.93.144:2375'

apply the changes made to the .bashrc file

source ~/.bashrc

All Commands at once:

sudo su -
yum update -y
wget -O /etc/yum.repos.d/jenkins.repo \
    https://pkg.jenkins.io/redhat-stable/jenkins.repo
rpm --import https://pkg.jenkins.io/redhat-stable/jenkins.io-2023.key
yum upgrade -y
amazon-linux-extras install java-openjdk11 -y
yum install jenkins -y
systemctl enable jenkins
systemctl start jenkins
systemctl status jenkins

LET'S START JENKINS:

Manage jenkins : Global Tool configuration:
add maven & docker
Add dokcer & docker-compose plugins
New Job:
Name: jenkins_devops_microservice_pipeline
select pipeline option from down


select Poll SCM:* * * * *
go to Pipeline : Pipeline script from SCM
SCM:git & Repository URL : https://github.com/Haneesh55/SpringBootEcommerceApplication.git
BUILD NOW : click on link & openconsole #

<><><<><><<>><><><><><><>><><><><><><><><>>

METHOD 2

Downloading and running Jenkins in Docker(as a container):

Switch to root user & Install Docker:

sudo su -
yum install -y docker
systemctl start docker 
systemctl enable docker

Create a bridge network in Docker using the following docker network create command:

docker network create jenkins

In order to execute Docker commands inside Jenkins nodes, download and run the docker:dind Docker image using the following docker run command:

docker run --name jenkins-docker --rm --detach \
  --privileged --network jenkins --network-alias docker \
  --env DOCKER_TLS_CERTDIR=/certs \
  --volume jenkins-docker-certs:/certs/client \
  --volume jenkins-data:/var/jenkins_home \
  --publish 2376:2376 \
  docker:dind --storage-driver overlay2

docker run --name docker_dind_container --rm --detach \
  --privileged --network jenkins --network-alias docker \
  --env DOCKER_TLS_CERTDIR=/certs \
  --volume jenkins-docker-certs:/certs/client \
  --volume jenkins-data:/var/jenkins_home \
  --publish 2376:2376 \
  haneeshdevops/docker:dind --storage-driver overlay2

Customise official Jenkins Docker image, by executing below two steps:

a) Create "Dockerfile" with the following content:

FROM jenkins/jenkins:2.401.1
USER root
RUN apt-get update && apt-get install -y lsb-release
RUN curl -fsSLo /usr/share/keyrings/docker-archive-keyring.asc \
  https://download.docker.com/linux/debian/gpg
RUN echo "deb [arch=$(dpkg --print-architecture) \
  signed-by=/usr/share/keyrings/docker-archive-keyring.asc] \
  https://download.docker.com/linux/debian \
  $(lsb_release -cs) stable" > /etc/apt/sources.list.d/docker.list
RUN apt-get update && apt-get install -y docker-ce-cli
USER jenkins
RUN jenkins-plugin-cli --plugins "blueocean docker-workflow"

b) Build a new docker image from this Dockerfile and assign the image a meaningful name, e.g. "myjenkins-blueocean:2.401.1-1":

docker build -t myjenkins-blueocean:2.401.1-1 .

Run your own myjenkins-blueocean:2.401.1-1 image as a container in Docker using the following docker run command:

docker run --name jenkins-blueocean --restart=on-failure --detach \
  --network jenkins --env DOCKER_HOST=tcp://docker:2376 \
  --env DOCKER_CERT_PATH=/certs/client --env DOCKER_TLS_VERIFY=1 \
  --publish 8080:8080 --publish 50000:50000 \
  --volume jenkins-data:/var/jenkins_home \
  --volume jenkins-docker-certs:/certs/client:ro \
  myjenkins-blueocean:2.401.1-1

docker run --name jenkins_dind_container --restart=on-failure --detach \
  --network jenkins --env DOCKER_HOST=tcp://docker:2376 \
  --env DOCKER_CERT_PATH=/certs/client --env DOCKER_TLS_VERIFY=1 \
  --publish 8080:8080 --publish 50000:50000 \
  --volume jenkins-data:/var/jenkins_home \
  --volume jenkins-docker-certs:/certs/client:ro \
  haneeshdevops/jenkins:dind

All Docker images

docker images

All running Docker Containers

docker ps

Wait for 30seconds to 1Minute

Execute the following command to get the initial administrator password:

docker exec jenkins-blueocean cat /var/jenkins_home/secrets/initialAdminPassword

Step 3

sudo su -
yum install -y docker
systemctl start docker 
systemctl enable docker
docker network create jenkins

docker run --name docker_dind_container --rm --detach \
  --privileged --network jenkins --network-alias docker \
  --env DOCKER_TLS_CERTDIR=/certs \
  --volume jenkins-docker-certs:/certs/client \
  --volume jenkins-data:/var/jenkins_home \
  --publish 2376:2376 \
  haneeshdevops/docker:dind --storage-driver overlay2

docker run --name jenkins_dind_container --restart=on-failure --detach \
  --network jenkins --env DOCKER_HOST=tcp://docker:2376 \
  --env DOCKER_CERT_PATH=/certs/client --env DOCKER_TLS_VERIFY=1 \
  --publish 8080:8080 --publish 50000:50000 \
  --volume jenkins-data:/var/jenkins_home \
  --volume jenkins-docker-certs:/certs/client:ro \
  haneeshdevops/jenkins:dind

docker exec jenkins_dind_container  cat /var/jenkins_home/secrets/initialAdminPassword