################################################################### Jenkins Installation on Ubuntu #########################################################################

$ sudo apt update
$ sudo apt install default-jdk
$ update-alternatives --config java    //To find out where apt installed Java on Ubuntu
$ sudo nano /etc/environment
PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin"
JAVA_HOME="/lib/jvm/java-11-openjdk-amd64/bin/java"
$ source /etc/environment 
$ echo $JAVA_HOME
#Install Jenkins with weekly release of below page
Refer---https://www.jenkins.io/doc/book/installing/linux/
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
$ sudo systemctl enable jenkins       //Enable the Jenkins service to start at boot
$ sudo systemctl start jenkins        //Start Jenkins as a service
$ systemctl status jenkins

################################################################### Ansible Installation on Ubuntu #########################################################################

Refer--https://phoenixnap.com/kb/install-ansible-ubuntu-20-04
$ sudo adduser ansibleadmin
$ sudo usermod -aG sudo ansibleadmin
$ sudo init 6
$ sudo su ansibleadmin
$ ssh-keygen       //public key is at /home/ansibleadmin/.ssh/id_rsa.pub
$ sudo apt-add-repository ppa:ansible/ansible
$ sudo apt update
$ sudo apt install ansible-core
$ ansible --version
$ cd /opt
$ sudo mkdir docker
$ sudo chown ansibleadmin:ansibleadmin docker
$ sudo apt install docker.io
$ systemctl status docker
$ sudo usermod -aG docker ansibleadmin
$ id ansibleadmin

# Create Ansible Playbook to Create Docker Image and Copy Image to DockerHub 

$ sudo apt install net-tools
$ ifconfig
$ sudo nano /etc/ansible/host
$ ssh-copy-id localhost    //adding self ssh key
$ nano cafe-app.yml
---
- hosts: ansible

  tasks:
  - name: clone repository
    git:
      repo: https://github.com/Ashfaque-9x/Cafe-App.git
      dest: /opt/docker/cafe-app
      clone: yes
      update: yes

  - name: create docker image
    command: docker build -t cafe-app:latest /opt/docker/cafe-app
    args:
     chdir: /opt/docker/

  - name: create tag to push image onto dockerhub
    command: docker tag cafe-app:latest ashfaque9x/cafe-app:latest

  - name: push docker image
    command: docker push ashfaque9x/cafe-app:latest

$ ansible-playbook cafe-app.yml --check
$ ansible-playbook cafe-app.yml
$ docker images
$ docker login

################################################### Install Azure CLI and Connect to Kubernetes from Azure CLI #######################################

Refer--https://learn.microsoft.com/en-us/cli/azure/install-azure-cli-linux?pivots=apt
$ curl -sL https://aka.ms/InstallAzureCLIDeb | sudo bash
$ az --version
$ az login
$ az aks install-cli
$ az aks get-credentials --resource-group MyLab-RG --name mylab-cluster
$ kubectl get nodes

################################################### Create Deployment and Service Manisfest Files ###################################################
Refer--https://kubernetes.io/docs/concepts/workloads/controllers/deployment/
$ nano cafe-app-deployment.yml
apiVersion: apps/v1
kind: Deployment
metadata:
  name: mylab-cafe-app
  labels:
     app: cafe-app

spec:
  replicas: 2
  selector:
    matchLabels:
      app: cafe-app

  template:
    metadata:
      labels:
        app: cafe-app
    spec:
      containers:
      - name: cafe-app
        image: ashfaque9x/cafe-app
        imagePullPolicy: Always
        ports:
        - containerPort: 80
  strategy:
    type: RollingUpdate
    rollingUpdate:
      maxSurge: 1
      maxUnavailable: 1

Refer---https://kubernetes.io/docs/tutorials/services/connect-applications-service/
$ nano cafe-app-service.yml
apiVersion: v1
kind: Service
metadata:
  name: mylab-service
  labels:
    app: cafe-app
spec:
  selector:
    app: cafe-app 

  ports:
    - port: 80
      targetPort: 80

  type: LoadBalancer

############################### Integrate Kube-Server with Ansible and Create Ansible Playbook for Deployment & Service Manifest files ###############################

$ nano /etc/ssh/sshd_config
PasswordAuthentication yes
PermitRootLogin yes
systemctl restart sshd
$ passwd root
$ ssh-copy-id root@10.0.0.6
$ ssh 'root@10.0.0.6'
$  mv cafe-app.yml create-image-cafe-app.yml 
$ nano kubernetes-deploy.yml
---
- hosts: kubernetes
  user: root

  tasks:
    - name: deploy cafeapp on kubernetes
      command: kubectl apply -f cafe-app-deployment.yml

    - name: create service for cafeapp
      command: kubectl apply -f cafe-app-service.yml

    - name: update deployment with new pods if image updated in docker hub
      command: kubectl rollout restart deployment.apps/mylab-cafe-app


$ ansible-playbook kubernetes-deploy.yml

Exec command:ansible-playbook /opt/docker/kubernetes-deploy.yml

############################################################## Cleanup ##############################################################
$ kubectl delete deployment.apps/mylab-cafe-app
$ kubectl delete service/mylab-service
$ az aks delete --name mylab-cluster --resource-group MyLab-RG