Docker advanced cheatsheet
Vocabulary
| Name | Description |
|---|---|
| Layer | set of read-only files or commands that describe how to set up the underlying system beneath the container. Layers are built on top of each other, and each one represents a change to the filesystem. |
| Image | immutable layer that forms the base of the container. |
| Container | instance of the image that can be executed as an independent application. The container has a mutable layer that lies on top of the image and that is separate from the underlying layers. |
| Registry | storage and content delivery system used for distributing Docker images. |
| Repository | collection of related Docker images, often different versions of the same application. |
❗ Notes
- Try to keep your images as small as possible, so containers are faster
- Don’t include libraries and dependencies unless they’re an absolute requirement for the application to run.
Commands
Developing with Docker Containers
| Command | Description |
|---|---|
docker create [image] |
Create a new container from a particular image. |
docker login |
Log into the Docker Hub repository. |
docker pull [image] |
Pull an image from the Docker Hub repository. |
docker push [username/image] |
Push an image to the Docker Hub repository. |
docker search [term] |
Search the Docker Hub repository for a particular term. |
docker tag [source] [target] |
Create a target tag or alias that refers to a source image. |
Running Docker Containers
| Command | Description |
|---|---|
docker start [container] |
Start a particular container. |
docker stop [container] |
Stop a particular container. |
docker exec -ti [container] [command] |
Run a shell command inside a particular container. |
docker run -ti — image [image] [container] [command] |
Create and start a container at the same time, and then run a command inside it. |
docker run -ti — rm — image [image] [container] [command] |
Create and start a container at the same time, run a command inside it, and then remove the container after the command execution. |
docker pause [container] |
Pause all processes running within a particular container. |
Using Docker Utilities
| Command | Description |
|---|---|
docker history [image] |
Display the history of a particular image. |
docker images |
List all of the images that are currently stored on the system. |
docker inspect [object] |
Display low-level information about a particular Docker object. |
docker ps |
List all of the containers that are currently running. |
docker version |
Display the version of Docker that is currently installed on the system. |
Cleaning Up Your Docker Environment
| Command | Description |
|---|---|
$ docker kill [container] |
Kill a particular container. |
$ docker kill $(docker ps -q) |
Kill all containers that are currently running. |
$ docker rm [container] |
Delete a particular container that is not currently running. |
$ docker rm $(docker ps -a -q) |
Delete all containers that are not currently running. |