Docker and Kubernetes Udemy Course Notes

Docker Commands

dk run -it <image>

dk build -t <tag> [ -f <name of Dockerfile>] <path to dir containing Dockerfile>

dk exec -it <container ID> <command>

Remove images

dk rmi <image ids separated by white space>

Remove all images without containers referencing them

dk image prune

Copy from host to container

dk copy <host path> <container name/id>:<path to copy to>

Copy from container to host

dk copy <container name/id>:<path to copy> <host path dest>

Create new tag for image before pushing to registry

dk tag <local tag> <remote registry tag>

Cleanup anonymous volumes

dk volume prune

Bind Mount shortcuts
Linux: -v $(pwd):/foo
Windows: -v "%cd%":/foo

Create a network

dk network create <name>

Create tag from container and associate with registry

dk commit <container id> <registry url>/<repo_name>

EXEC - These commands always run. When additional commands are specified to start/run a container they are appended to the EXEC command
CMD - These commands are overwritten by commands specified on the CLI.

Volumes - managed by Docker
- Anonymous - Use for temporary data . Coupled to container. Removed when container is removed. Cannot be shared or reused.
- Named - Persistent after container is deleted. Can be shared and reused.
Bind Mounts - managed by Docker user. Can be shared and reused
- add :ro to bind mounts to make them read only, preventing containers from modifying files on the host

Use hostname host.docker.internal to allow containers to communicate with services running on the docker host.