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As a passionate DevOps Engineer with 3+ years of experience, I specialize in building robust, scalable, and secure infrastructures. My expertise spans Kubernetes, Jenkins, Docker, AWS, Ansible, Flask, Apache, Nginx, Kibana, Uyuni, Percona PMM, MySQL, and more.
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📋 Prerequisites Install base tools and keys: sudo apt update && sudo apt install -y \ curl gnupg2 ca-certificates lsb-release debian-archive-keyring Add NGINX.org signing key: curl https://nginx.org/keys/nginx_signing.key | gpg --dearmor | sudo t...
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Install Jenkins using below commands for Ubuntu 22.04
apt-get update
apt install openjdk-11-jre
curl -fsSL https://pkg.jenkins.io/debian/jenkins.io-2023.key | sudo tee \
/usr/share/keyrings/jenkins-keyring.asc > /dev/null
echo deb [signed-by=/usr/share/keyrings/jenkins-keyring.asc] \
https://pkg.jenkins.io/debian binary/ | sudo tee \
/etc/apt/sources.list.d/jenkins.list > /dev/null
sudo apt-get update
sudo apt-get install jenkins
Port 8O8O should be open to access Jenkins, if its busy already use the below command and change the port.
systemctl edit jenkins
[Service]
Environment="JENKINS_PORT=8080"
Change 8080 to whatever port is available.
open http://<IP>:8080 and enter Admin password which is available in the below path.
cat /var/lib/jenkins/secrets/initialAdminPassword
Install the required plugins and pass the initial username, passwords and continue.
Install Docker using official documentation- https://docs.docker.com/engine/install/ubuntu/
Run the below commands to give access to Jenkins users to run docker commands in the server.
chmod 666 /var/run/docker.sock
Now open Jenkins UI and click on New Item and name it a simple app and select Pipeline.
https://github.com/prashanthgowdagr/simple-index.html-app.git
Scroll down and select the GitHub hook trigger. This will help us to build the Jenkins job whenever the commit is made to the 'MAIN' branch of the Git repo.
To set this up go to GitHub and under repo go to settings> Webhooks> and paste the Jenkins server IP address with port number and end with GitHub-webhook/ (don't forget the / in the end). Select Just the push event and save the changes.
Under Pipeline select Pipeline script from SCM and select GIT as SCM.
Enter Git repo URL and branch as main. The script path should be specified as Jenkinsfile.
Before running the job go to Manage_Jenkins> Credentials> system> golbal> name it "dockercreds" (Use same or it will throw an error/change the variable in jenkinsfile) and enter your DockerHub creds and password. If there is no DockerHub account, plz create one it's FREE!!!
Run the job now and this will pull the code from Git and copy the index.html into the docker container and runs it. You can access the webpage now using http://<IP>:80
This will also push the updated container to DockerHub with the tag 'latest' and also with the 'Jenkins Build Number'.