Gitlab with Kubernetes

Prerequisite:

3 Vms ubuntu in Aws 

1 machine GitLab runner is already running

 Step 1: On All the machine install kubernetes agent and common components

sudo apt-get update && sudo apt-get install -y apt-transport-https curl

curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add -

cat <<EOF | sudo tee /etc/apt/sources.list.d/kubernetes.list

deb https://apt.kubernetes.io/ kubernetes-xenial main

EOF

sudo apt-get update

apt install -qq -y kubeadm=1.21.0-00 kubelet=1.21.0-00 kubectl=1.21.0-00

sudo apt-mark hold kubelet kubeadm kubectl

Step 2: Run below commands on Gitlab server machine

1. kubeadm init --apiserver-advertise-address=<<Master ServerIP>> --pod-network-cidr=192.168.0.0/16
2.  mkdir -p $HOME/.kube
3.  sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
4. sudo chown $(id -u):$(id -g) $HOME/.kube/config
5. kubectl create -f https://docs.projectcalico.org/v3.18/manifests/calico.yaml

Step 3: Install helm on Master server only.

 curl https://baltocdn.com/helm/signing.asc | sudo apt-key add -

 sudo apt-get install apt-transport-https --yes

 echo "deb https://baltocdn.com/helm/stable/debian/ all main" | sudo tee /etc/apt/sources.list.d/helm-stable-debian.list

 sudo apt-get update

 sudo apt-get install helm

Create Deployment

helm create deploy

cd deploy/templates

rm * -ifr

vi deployment.yaml

apiVersion: apps/v1

kind: Deployment

metadata:

  name: capstone-deploy

  labels:

    app: capstone-app

spec:

  replicas: 3

  template:

    metadata:

      labels:

        app: capstone-app

    spec:

      containers:

      - name: container

        image: nginx:1.7.9

        ports:

        - containerPort: 80

  selector:

    matchLabels:

      app: capstone-app

Create a Nodeport service file service.yaml

apiVersion: v1

kind: Service

metadata:

  name: capstone-service

  labels:

    app: capstone-app

spec:

  selector:

    app: capstone-app

  type: NodePort

  ports:

  - nodePort: 31111

    port: 80

    targetPort: 80

Save the file

cd ../..

helm install capstonecharts deploy'

helm list

helm uninstall capstonecharts