base on Install Jenkins, configure Docker as slave, set up cicd, deploy applications to k8s using Argo CD in GitOps way. # Jenkins-Zero-To-Hero Are you looking forward to learn Jenkins right from Zero(installation) to Hero(Build end to end pipelines)? then you are at the right place. ## Installation on EC2 Instance YouTube Video -> https://www.youtube.com/watch?v=zZfhAXfBvVA&list=RDCMUCnnQ3ybuyFdzvgv2Ky5jnAA&index=1  Install Jenkins, configure Docker as agent, set up cicd, deploy applications to k8s and much more. ## AWS EC2 Instance - Go to AWS Console - Instances(running) - Launch instances <img width="994" alt="Screenshot 2023-02-01 at 12 37 45 PM" src="https://user-images.githubusercontent.com/43399466/215974891-196abfe9-ace0-407b-abd2-adcffe218e3f.png"> ### Install Jenkins. Pre-Requisites: - Java (JDK) ### Run the below commands to install Java and Jenkins Install Java ``` sudo apt update sudo apt install openjdk-17-jre ``` Verify Java is Installed ``` java -version ``` Now, you can proceed with installing Jenkins ``` 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 ``` **Note: ** By default, Jenkins will not be accessible to the external world due to the inbound traffic restriction by AWS. Open port 8080 in the inbound traffic rules as show below. - EC2 > Instances > Click on <Instance-ID> - In the bottom tabs -> Click on Security - Security groups - Add inbound traffic rules as shown in the image (you can just allow TCP 8080 as well, in my case, I allowed `All traffic`). <img width="1187" alt="Screenshot 2023-02-01 at 12 42 01 PM" src="https://user-images.githubusercontent.com/43399466/215975712-2fc569cb-9d76-49b4-9345-d8b62187aa22.png"> ### Login to Jenkins using the below URL: http://<ec2-instance-public-ip-address>:8080 [You can get the ec2-instance-public-ip-address from your AWS EC2 console page] Note: If you are not interested in allowing `All Traffic` to your EC2 instance 1. Delete the inbound traffic rule for your instance 2. Edit the inbound traffic rule to only allow custom TCP port `8080` After you login to Jenkins, - Run the command to copy the Jenkins Admin Password - `sudo cat /var/lib/jenkins/secrets/initialAdminPassword` - Enter the Administrator password <img width="1291" alt="Screenshot 2023-02-01 at 10 56 25 AM" src="https://user-images.githubusercontent.com/43399466/215959008-3ebca431-1f14-4d81-9f12-6bb232bfbee3.png"> ### Click on Install suggested plugins <img width="1291" alt="Screenshot 2023-02-01 at 10 58 40 AM" src="https://user-images.githubusercontent.com/43399466/215959294-047eadef-7e64-4795-bd3b-b1efb0375988.png"> Wait for the Jenkins to Install suggested plugins <img width="1291" alt="Screenshot 2023-02-01 at 10 59 31 AM" src="https://user-images.githubusercontent.com/43399466/215959398-344b5721-28ec-47a5-8908-b698e435608d.png"> Create First Admin User or Skip the step [If you want to use this Jenkins instance for future use-cases as well, better to create admin user] <img width="990" alt="Screenshot 2023-02-01 at 11 02 09 AM" src="https://user-images.githubusercontent.com/43399466/215959757-403246c8-e739-4103-9265-6bdab418013e.png"> Jenkins Installation is Successful. You can now starting using the Jenkins <img width="990" alt="Screenshot 2023-02-01 at 11 14 13 AM" src="https://user-images.githubusercontent.com/43399466/215961440-3f13f82b-61a2-4117-88bc-0da265a67fa7.png"> ## Install the Docker Pipeline plugin in Jenkins: - Log in to Jenkins. - Go to Manage Jenkins > Manage Plugins. - In the Available tab, search for "Docker Pipeline". - Select the plugin and click the Install button. - Restart Jenkins after the plugin is installed. <img width="1392" alt="Screenshot 2023-02-01 at 12 17 02 PM" src="https://user-images.githubusercontent.com/43399466/215973898-7c366525-15db-4876-bd71-49522ecb267d.png"> Wait for the Jenkins to be restarted. ## Docker Slave Configuration Run the below command to Install Docker ``` sudo apt update sudo apt install docker.io ``` ### Grant Jenkins user and Ubuntu user permission to docker deamon. ``` sudo su - usermod -aG docker jenkins usermod -aG docker ubuntu systemctl restart docker ``` Once you are done with the above steps, it is better to restart Jenkins. ``` http://<ec2-instance-public-ip>:8080/restart ``` The docker agent configuration is now successful. ", Assign "at most 3 tags" to the expected json: {"id":"2242","tags":[]} "only from the tags list I provide: []" returns me the "expected json"