my-dockerHub collection

https://hub.docker.com/search/?q=genghuiluo

Download Docker engine & Search Docker image

1. Docker CE vs Docker EE
2. Install using repository vs Install from a package

Dockerfile reference.

Get started with Docker.

Here is a list of the basic commands from this page, and some related ones if you’d like to explore a bit before moving on.

docker build -t friendlyname .  # Create image using this directory's Dockerfile
docker run -p 4000:80 friendlyname  # Run "friendlyname" mapping port 4000 to 80
docker run -d -p 4000:80 friendlyname         # Same thing, but in detached mode
docker ps                                 # See a list of all running containers
docker stop <hash>                     # Gracefully stop the specified container
docker ps -a           # See a list of all containers, even the ones not running
docker kill <hash>                   # Force shutdown of the specified container
docker rm <hash>              # Remove the specified container from this machine
docker rm $(docker ps -a -q)           # Remove all containers from this machine
docker images -a                               # Show all images on this machine
docker rmi <imagename>            # Remove the specified image from this machine
docker rmi $(docker images -q)             # Remove all images from this machine
docker login             # Log in this CLI session using your Docker credentials
docker tag <image> username/repository:tag  # Tag <image> for upload to registry
docker push username/repository:tag            # Upload tagged image to registry
docker run username/repository:tag                   # Run image from a registry

Q & A

1. How to copy docker images from one host to another without via repository?

   utilize docker save & load for image and docker export & import for container

   docker save xxx_image_name:tags | gzip > ~/xxx-tags.tar.gz
   gzip -cd xxx-tags.tar.gz | docker load
   
   docker export xxx_container_name | gzip > ~/xxx.tar.gz
   gzip -cd xxx.tar.gz | docker import - xxx_image_name:tags # exported container & re-import as image
   

   What is the difference between import and load in Docker?

2. docker rmi <your_name>/<image_name>:<tag> remove a tag; docker rmi <image_id> remove a image

3. Dockerfile: RUN vs CMD vs ENTRYPOINT?

4. To remove dangling images: docker images -f "dangling=true" -q|xargs docker rmi

5. Get container IP: docker inspect -f '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' container_name_or_id

6. utilize docker logs for debugging