Jan 20 K8s.txt

#(Install docker in all instances)
sudo apt-get update
sudo apt-get install docker.io -y

#===================================
#(install.sh)
sudo apt update
sudo apt upgrade -y
sudo apt install -y curl apt-transport-https ca-certificates software-properties-common
curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add -
sudo add-apt-repository "deb http://apt.kubernetes.io/ kubernetes-xenial main" 
sudo swapoff -a	
sudo apt update
sudo apt install -y kubelet kubeadm kubectl

#==================================================
#(master instance)
sudo kubeadm init  (this will generate a token that you need to paste in slaves machine)

#================================================
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config

kubectl apply -f https://github.com/weaveworks/weave/releases/download/v2.8.1/weave-daemonset-k8s.yaml

kubectl get nodes


M
    1  sudo nano install.sh
    2  ls
    3  bash install.sh 
    4  sudo kubeadm init
    5  mkdir -p $HOME/.kube
    6  sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
    7  sudo chown $(id -u):$(id -g) $HOME/.kube/config
    8  kubectl apply -f https://github.com/weaveworks/weave/releases/download/v2.8.1/weave-daemonset-k8s.yaml
    9  kubectl get nodes
    
S
    1  sudo nano install.sh
    2  ls
    3  bash install.sh 
    4  sudo kubeadm join 172.31.26.227:6443 --token 0ld7co.bh4uyxaq06f5n45i         --discovery-token-ca-cert-hash sha256:1a364d85a0f9e30248dbc7813476d6f02da04430f1bc4c73584b649a54c74dba

Paste token after initialization
kubeadm token create --print-join-command

M
   12  sudo nano assign1.yaml
   13  kubectl get deploy
   14  kubectl appl y-f assign1.yaml 
   15  kubectl apply -f assign1.yaml 
   16  kubectl get deploy
   17  kubectl get pods
   18  kubectl get pods -o wide
   
ubuntu@ip-172-31-26-227:~$ cat assign1.yaml 
apiVersion: apps/v1
kind: Deployment
metadata:
  name: assignment1-deployment
  labels:
    app: nginx
spec:
  replicas: 3
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx
        ports:
        - containerPort: 80

M
   22  sudo nano assign2.yaml
   23  kubectl apply -f assign2.yaml 
   24  kubectl et svc
   25  kubectl get svc
   
apiVersion: v1
kind: Service
metadata:
  name: my-service
spec:
  type: NodePort
  selector:
    app: nginx
  ports:
    - port: 80
      # By default and for convenience, the `targetPort` is set to
      # the same value as the `port` field.
      targetPort: 80
      # Optional field
      # By default and for convenience, the Kubernetes control plane
      # will allocate a port from a range (default: 30000-32767)
      nodePort: 30007
      
M
   28  kubectl edit deploy
   29  kubectl get deploy
   30  kubectl get po
   31  kubectl edit svc
   32  kubectl get svc
   
   35  sudo nano assign5.yaml
   36  kubectl apply -f assign5.yaml 
   37  kubectl get ing
   38  cat assign5.yaml 
   39  history
ubuntu@ip-172-31-26-227:~$ cat assign5.yaml 
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: minimal-ingress
  annotations:
    nginx.ingress.kubernetes.io/rewrite-target: /
spec:
  ingressClassName: nginx-example
  rules:
  - http:
      paths:
      - path: /nginx
        pathType: Prefix
        backend:
          service:
            name: my-service
            port:
              number: 80