Docker Compose

• Docker Compose is used for running multiple containers as a single service. 

• Each of the containers here run in isolation but can interact with each other when required.

• Kubernetes and Docker Compose are both container orchestration frameworks. 

• Kubernetes runs containers over a number of computers, virtual or real.  

• Docker Compose runs containers on a single host machine.

 File : docker-compose.yml

version: '3'

services:

webapp1:

image: nginx

ports:

- "8000:80"

webapp2:

image: nginx

ports:

- "8002:80"

 

NOTE:Default file name is docker-compose,you can define your docker-compose file using below syntax

docker-compose -f docker-compose2.yml up -d

(-d for background ) 

Commands:

docker-compose create ( depreciated ,create only container and does not create network)
docker-compose up --no-start  ( create only container with default network)
docker-compose rm ( to remove container )
docker-compose start ( To start container )
docker-compose stop ( To stop container )

docker-compose rm ( To delete container ) 
docker-compose images ( To view images )
docker container ls 
docker-compose ps ( To check state of container )
docker-compose pause ( To pause any container )
docker-compose unpause ( To unpause any container ) 

docker-compose up -d  
docker-compose down

 

docker-compose kill ( To kill containers )
docker-compose start
docker-compose port webapp1 80 ( To check public accessible port )
docker-compose logs -f ( To check online logs )

docker-compose ps
docker containers ls -a

docker-compose exec webapp1 ls ( To run ls command inside running container )
docker-compose run webapp1 ls ( To run ls command inside a new  container and container went down )


docker-compose restart ( To restart container )
docker-compose pull ( Pull image from registry )
docker-compose push ( push  image to the  registry )
docker-compose --version

 File :docker-compose.yml

version: '3'

services:

webapp1:

image: nginx

webapp2:

image: nginx

docker-compose scale webapp1=4 webapp2=4 ( To scale )
docker-compose top ( To view running process )
  
 To be continue....