Kubernetes

1. use eksctl or aws console to create a cluster, eksctl is a cli tool for creating clusters on EKS, it is written in Go, and uses CloudFormation.
2. use kubectl to get nodes, pods, services, deployments, etc.

1. Create Cluster

eksctl create cluster \
--nodegroup-name eks-nodegroup \
--region eu-west-2 \
--name eks-cluster \
--version 1.14 \
--node-type t2.micro \
--nodes 2 \
--nodes-min 1 \
--nodes-max 3 \
--managed

2. Get Nodes

kubectl get nodes

3. Get Pods

kubectl get pods

4. Get Services

kubectl get svc

5. Get Deployments

kubectl get deployments

6. write a deployment.yaml file for your application

apiVersion: apps/v1
kind: Deployment
metadata:
  name: my-app
  labels:
    app: my-app
spec:
  replicas: 3
  selector:
    matchLabels:
      app: my-app
  template:
    metadata:
      labels:
        app: my-app
    spec:
      containers:
        - name: my-app
          image: my-app:latest
          ports:
            - containerPort: 8080

7. Deploy your application

# single file deployment
kubectl apply -f deployment.yaml

# multiple file deployment
kubectl apply -f deployment.yaml -f service.yaml

# deployment from a directory, if you have multiple files in a directory
kubectl apply -f ./k8s

8. Get all resources

kubectl get all

9. Get logs

kubectl logs -f <pod-name>

10. Get shell access

kubectl exec -it <pod-name> -- /bin/bash

11. Delete Cluster

eksctl delete cluster --name eks-cluster

12. Delete all resources

kubectl delete all --all

13. Delete all resources from a directory

kubectl delete -f ./k8s

14. Delete all resources from a file

kubectl delete -f deployment.yaml