Learn to build and deploy your distributed applications easily to the cloud with Docker.

Installation

This is optional in docker docs, but I recommend not skipping this step

List of useful docker commands

If you are a complete beginner, then I recommend this website.

Note: First go through the article above, it will make these commands more understandable

  • docker pull busybox: The¬†pull¬†command fetches the busybox¬†image¬†from the¬†Docker registry¬†and saves it to our system.
  • docker images: See a list of all docker images on your system.
  • docker run busybox: Run a Docker¬†container¬†based on the image.
  • docker ps: Shows you all containers that are currently running.
  • docker ps -a:List of all containers that we ran.
  • docker run -it busybox sh: Attaches us to an interactive tty in the container.
  • docker run --help: See a list of all flags run command supports.
  • docker rmi <image_id>: Remove a docker image.
  • ```docker rm <container_id>: Clean up containers once done with them.
  • docker rm $(docker ps -a -q -f status=exited): Deleting a bunch of stoped containers.
  • docker container prune:Deleting bunch of stopped containers (Similar to above - Supports later versions).
  • docker run -d -P --name static-site prakhar1989/static-site: -d¬†will detach our terminal,¬†-P¬†will publish all exposed ports to random ports, and finally¬†--name¬†corresponds to a name we want to give.
  • docker port static-site: List the ports of static-site container.
  • docker run -p 8888:80 prakhar1989/static-site: Specify a custom port to which the client will forward connections to the container. You can access it at localhost:8888 on your browser.
  • docker stop static-site: Stop a detached container.
  • docker pull ubuntu:18.04: You can pull a specific version of¬†the ubuntu¬†image.
  • docker build -t yourusername/catnip .: The¬†docker build¬†command does the heavy lifting of creating a Docker image from a¬†Dockerfile. It¬†is quite simple - it takes an optional tag name with¬†-t¬†and a location of the directory containing the¬†Dockerfile.
  • docker login: Provide the same credentials that you used for logging into Docker Hub.
  • docker push yourusername/catnip:To publish, just type the below command remembering to replace the name of the image tag above with yours. It is important to have the format of¬†yourusername/image_name¬†so that the client knows where to publish.
  • docker search elasticsearch: Search for an image.
  • docker container ls: Similar to docker ps.
  • docker network ls: List of networks in docker.
  • docker network inspect bridge: To¬†inspect the network.
  • docker network create foodtrucks-net: The¬†network create¬†command creates a new¬†bridge¬†network, which is what we need at the moment. In terms of Docker, a bridge network uses a software bridge which allows containers connected to the same bridge network to communicate, while providing isolation from containers that are not connected to that bridge network.¬†
  • docker container stop es: Stop a container.
  • docker container rm es: Remove a container.
  • docker run -d --net foodtrucks-net -p 5000:5000 --name foodtrucks-web prakhar1989/foodtrucks-web: We can launch our containers inside the custom network using the¬†--net¬†flag.
  • docker-compose up: Compose is a tool that is used for defining and running multi-container Docker apps in an easy way. It provides a configuration file called¬†docker-compose.yml¬†that can be used to bring up an application and the suite of services it depends on with just one command.
  • docker-compose down -v: To destroy the cluster and the data volumes. Otherwise, you would have used: docker stop and docker rm.
  • docker-compose up -d: docker-compose up in detached mode.
  • docker-compose run web bash: Opens the shell inside the web service.

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