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Setting Up Docker

Check Out Docker Hub

Docker hub is something like an 'npm' of docker pre-built images.

  • mongo (downloaded 1 BILLION+ times!!)
  • mongo-express (downloaded 100 MILLION+ times!!)
  • redis(downloaded 1 BILLION+ times!)
  • nginx(downloaded 1 BILLION+ times!)

Running Docker Images

docker run thats the main command.

Here's a more realistic command...

docker run --interactive --tty alpine:3.10 # or, to be shorter: docker run -it alpine:3.10

Developers might be more interested in RUNNING containers rathe than BUILDING them.

  • apline is the flavor of linux being run , sourced from docker-hub
  • COULD run docker run alpine
    • this would implicitly run alpine:latest
    • try to be explicit about versions being used
  • ALPINE IS...
    • tiny linux, has bare-bone necessities for running web-servers

check cur version cat /etc/issue ...etc/issue is a linux file that prints which version of linux is being run should return Welcome to Alpine...

Made to be ephemeral

docker containers are made to be spun up && thrown out

docker run shortcut

docker run -it alpine:3.10
  • puts me interactively inside the container
  • docker run alpine 3.10 runs && quits

run a command after starting a container

docker run alpine:3.10 ls
  • ls of the container (the root of the container)

order of commands matters

  • docker
  • run (the command)
  • flags (--t --rm)
  • name of container (alpine:3.10)
  • command to run (ls, etc)

how to clear docker images that are running

docker image prune

run a container in the bg

docker run -it --detach ubuntu:bionic
  • detach spits out the hash
  • runs container in bg

attach a bg container

docker attach <container-name-here>

kill a container

docker kill <container-id OR name>

Naming a container

docker run -it --name my-container apline:3.10

  • NAMES the container my-container

NOTE: cant use a container name 2x

  • particularly after 'kill'ing a container
  • MUST run docker rm my-alpine
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