kubernetes-kompose tool

Kompose can convert the yaml file of docker compose into the yaml file used by kubernetes

Installation reference https://kompose.io/installation/

curl -L https://github.com/kubernetes/kompose/releases/download/v1.22.0/kompose-linux-amd64 -o kompose
chmod +x kompose
sudo mv ./kompose /usr/local/bin/kompose

Prepare a docker-compose yml

version: "3.9"
    
services:
  db:
    image: mysql:5.7
    volumes:
      - db_data:/var/lib/mysql
    restart: always
    environment:
      MYSQL_ROOT_PASSWORD: somewordpress
      MYSQL_DATABASE: wordpress
      MYSQL_USER: wordpress
      MYSQL_PASSWORD: wordpress
    
  wordpress:
    depends_on:
      - db
    image: wordpress:latest
    volumes:
      - wordpress_data:/var/www/html
    ports:
      - "8000:80"
    restart: always
    environment:
      WORDPRESS_DB_HOST: db:3306
      WORDPRESS_DB_USER: wordpress
      WORDPRESS_DB_PASSWORD: wordpress
      WORDPRESS_DB_NAME: wordpress
volumes:
  db_data: {}
  wordpress_data: {}

try convert

lizhe@ubuntu:~/works$ kompose convert
FATA Version 3.9 of Docker Compose is not supported. Please use version 1, 2 or 3 
lizhe@ubuntu:~/works$ 

Modify the version of the compose file from 3.9 to 3

Then we create the kubernetes resource

check the application by svc

kubectl port-forward --namespace default service/wordpress 8000:8000

It is easy to find that the DB does not generate a service here, because docker compose There is no port in dB in YML file
Modify it

You can see that the DB service is generated this time