What's the difference between Docker Compose and Kubernetes?

Question

While diving into Docker, Google Cloud and Kubernetes, and without clearly understanding all three of them yet, it seems to me these products are overlapping, yet they\'re not c

Answer 1

Docker compose: docker containers can be run directly with out assist of any yaml file. But with assist of Docker compose tool container properties can be defined inside a file called docker-compose.yml file. please find the below sample yml file for more details.

version: "3.7"
services:
  redis:
    image: redis:latest
    deploy:
      replicas: 1
    configs:
      - my_config
      - my_other_config
configs:
  my_config:
    file: ./my_config.txt
  my_other_config:
    external: true

name of image, number of replicas, etc.. can be configured through yml file.

Kubernetes: This is container management platform run on top of Docker built by google. Docker swam is another container management platform built by docker itself. Kubernetes also provide facility to save configuration related to pods(correspond to container in docker) in yaml file like docker compose. example yaml file

apiVersion: v1
kind: Pod
metadata:
  name: rss-site
  labels:
    app: web
spec:
  containers:
    - name: front-end
      image: nginx
      ports:
        - containerPort: 80
    - name: rss-reader
      image: nickchase/rss-php-nginx:v1
      ports:
        - containerPort: 88

here also images, ports to be opened and pod to host port mappings, etc.. can be given. like docker compose, kubectl apply -f is the command to run this file.