Docker useful commands

docker-handy-ref-2.sh

Reference: https://prakhar.me/docker-curriculum/#busybox

# Run a static website in background. d - detach mode, P - expose all ports, --name give name to the running container
docker run -d -P --name static-site prakhar1989/static-site

# To see the ports used
docker port static-site

# Docker networks

```
By default, all containers are ran in bridge network.
We can create our own network and run containers in that network. 
So that containers within the same network can easily communicate with each other, using the name.
```
# list network
docker network ls

# to start network
docker network create foodtrucks

# Start containers in same network
docker run -d --net foodtrucks -p 5000:5000 --name foodtrucks  wordofprasanna/foodtrucks
docker run -dp 9200:9200 --net foodtrucks --name es elasticsearch

# to remove network
docker network rm foodtrucks

# Docker compose
```
multi container environments
instead of dealing at the container level, it enables to deal at the app level
yml specification
creates:
  - container
  - network
service discovery is done through DNS Server, instead of changing /etc/hosts
```

docker-compose up -d
docker-compose stop