README_PartI.md

Simple Kubernetes example (cont.)

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PART I: : Deploy Nginx

1. Manually (CLI)

• Create

kubectl run nginx --image=nginx --replicas=1 --port=80
kubectl expose deployment nginx --type=LoadBalancer --name=mynginx

• View

watch kubectl describe service mynginx
or
watch kubectl get service mynginx -o wide

• Delete

kubectl delete service mynginx
kubectl delete deployment nginx

2. Via docker compose + kompose

• Requirements:

  • Install kompose: http://kompose.io/

• From docker-compose.yml

version: '3'

services:
  nginx:
    image: nginx:1.15
    ports:
      - "80:80"
    restart: unless-stopped

• Run: kompose convert -f docker-compose.yml
• Output:

WARN Restart policy 'unless-stopped' in service nginx is not supported, convert it to 'always'
INFO Kubernetes file "nginx-service.yaml" created
INFO Kubernetes file "nginx-deployment.yaml" created
$ tree
.
├── nginx-deployment.yaml
└── nginx-service.yaml

• Change @nginx-service.yaml:

name: nginx >> name: mynginx

• Add @nginx-service.yaml:

spec:
  type: LoadBalancer

• Apply YAML configurations:

kubectl apply --filename nginx-deployment.yaml
kubectl apply --filename nginx-service.yaml
kubectl describe service mynginx

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