Idea of this exercise is to build CICD Pipeline to automate deployment of Java application on k8s cluster. Continous Integration is implemented using Jenkins and Continous Delivery using ArgoCD to deploy application on local k8s cluster which is created using minikube.
Demo Video: https://youtu.be/rs7ujdJLMKo
Please follow below steps for installtion for respective components of this CICD implementation.
A) Installing Docker on Linux (Ubuntu)
sudo apt-get install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
sudo groupadd docker
sudo usermod -aG docker $USER
sudo usermod -aG docker jenkins
newgrp docker
docker run hello-world
sudo systemctl enable docker.service
sudo systemctl enable containerd.service
B) I'm using docker container for Jenkins Agent to carryout pipeline execution. Below are steps for Jenkins Installation on Linux.
Install Java
sudo apt update
sudo apt install openjdk-17-jre
java -version
Install Jenkins
curl -fsSL https://pkg.jenkins.io/debian-stable/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-stable binary/ | sudo tee /etc/apt/sources.list.d/jenkins.list > /dev/null
sudo apt-get update
sudo apt-get install jenkins
sudo systemctl enable jenkins
sudo systemctl status jenkins
sudo systemctl start jenkins
C) SonarQube is "Code Quality Assurance Tool" that collects and analyze source code, and provides reports for the code quality of your project. It combines static and dynamic analysis tools and enables quality to be measure continually over time.In a nutshell, SonarQube provide "Continuous Inspection".
Installing SonarQube on Linux(Ubuntu)
sudo apt install openjdk-17-jre
sudo apt install openjdk-17-jre
java -version
sudo su -
adduser sonarqube
su - sonarqube
wget https://binaries.sonarsource.com/Distribution/sonarqube/sonarqube-9.9.1.69595.zip --no-check-certificate
unzip sonarqube-9.9.1.69595.zip
chmod -R 755 /home/sonarqube/sonarqube-9.9.1.69595
chown -R sonarqube:sonarqube /home/sonarqube/sonarqube-9.9.1.69595
create three alias in your bash profile
alias start-sonar="/home/sonarqube/sonarqube-9.9.1.69595/bin/linux-x86-64/sonar.sh start"
alias stop-sonar="/home/sonarqube/sonarqube-9.9.1.69595/bin/linux-x86-64/sonar.sh stop"
alias status-sonar="/home/sonarqube/sonarqube-9.9.1.69595/bin/linux-x86-64/sonar.sh status"
After your start sonarqube, you can access webgui "http://localhost:9000/"
D) ArgoCD is designed to work natively with Kubernetes Clusters, making is easire to scale. In a nutshell, ArgoCD is a k8s controller, responsible for continously
monitoring all running applications and comparing their live state to the desired state defined in GIT repo. ArgoCD is declarative continous delivery tool for k8s applications.
As a prerequisite to ArgoCD, I've deployed k8s cluster using minikube. https://minikube.sigs.k8s.io/docs/start/
To install the latest minikube stable release on x86-64 Linux using binary download:
curl -LO https://storage.googleapis.com/minikube/releases/latest/minikube-linux-amd64
sudo install minikube-linux-amd64 /usr/local/bin/minikube
minikube start --memory=4098 --driver=docker
I'm using Operators as deployment of ArgoCD. https://operatorhub.io/operator/argocd-operator
-
Install Operator Lifecycle Manager (OLM), a tool to help manage the Operators running on your cluster.
curl -sL https://github.com/operator-framework/operator-lifecycle-manager/releases/download/v0.25.0/install.sh | bash -s v0.25.0 -
Install the operator by running the following command:
kubectl create -f https://operatorhub.io/install/argocd-operator.yamlThis Operator will be installed in the "operators" namespace and will be usable from all namespaces in the cluster. -
After install, watch your operator come up using next command.
kubectl get csv -n operators kubectl get pod -n operators -w
Use minikube service example-argocd-server to expose url to your desktop.
Default credentials:
admin/output of "kubectl get secret example-argocd-cluster -o jsonpath='{.data.admin\.password}' | base64 -d"
Modify Password
kubectl patch secret example-argocd-cluster -p '{"stringData": { "admin.password": "password" }}'