An application has a set of dependencies and OS compatibility. Some projects often constitutes of different applications. Multiple applications presents problems to the project with OS and dependency contradictions among these applications. Docker solves this issue by separating the applications into different environments and deliver them as images/containers.
This blog only covers a summary of the commands. See full documentation here.
| Command | Description |
|---|---|
| docker version | identify the docker version running on the host |
| docker run attach [container_id / container_name] | attach back to a running container |
| docker run --name=[container_name] [image] | assign a name when running a container |
| docker run --link [app_var]:[container_name] | links an application by mapping a variable of that app to a docker container |
| docker run -i [prompt_application] | runs prompt application in an interactive mode |
| docker run -it [prompt_application] | runs prompt application in an interactive mode on pseudo-terminal |
| docker run -p 80:5000 [image] | map port 80 of localhost to port 5000 of docker container |
| docker run -v [dir1]:[dir2] [image] | map docker host directory dir1 to docker container directory dir2 to preserve data |
| docker run -e [var]=[value] [image] | run an image defined by environment variable var=value |
| docker run [image] --network=host | run docker image on local host port |
| docker run --cpu=[percentage] [image] | makes sure that running an image will not take up a percentage, in decimal formt, threshold of the cpu |
| docker run --memory=[size]m [image] | makes sure that running an image will not take up a size threshold of the memory |
| docker ps | lists all running containers and some basic information about them |
| docker ps -a | lists all containers be it running, stopped, or exited |
| docker stop [container_id / container_name] | stop a running container |
| docker images | lists available images and their sizes |
| docker rm [container_id / container_name] | remove a stopped/exited container permanently |
| docker rmi | removes an image (make sure to have stopped and removed containers from this image) |
| docker exec [container_id / container_name] [???] [???] | execute a command on a docker container |
| docker inspect [container_id / container_name] | returns all details of a container in a json format |
| docker push [tag_name] | push your image into docker hub |
| docker pull [image] | pulls an image but doesn't run a container unlike docker run command |
| docker logs [container_id / container_name] | view the logs of container running in background or detached mode |
| docker build [docker_file] -t [tag_name] | build an image from docker file locally on your system |
| docker-compose up | bring up an entire application stack |
| docker network create --driver bridge subnet [subnet] custom-isolated-network | create a bridge network |
| docker network ls | list all docker networks |
| docker volume create [volume_name] | creates a volumee |