# Docker 學習紀錄
This is a note from [docker for beginners](https://docker-curriculum.com/#getting-started).

## Manage Docker as a non-root user
1. Create the docker group.
`$ sudo groupadd docker`
2. Add your user to the docker group.
`$ sudo usermod -aG docker $USER`
-G, --groups GROUPS new list of supplementary GROUPS
-a, --append append the user to the supplemental GROUPS mentioned by the -G option without removing the user from other groups.
3. Log out and log back in so that your group membership is re-evaluated. You can also run the following command to activate the changes to groups:
`$ newgrp docker`

## Getting Started
### Images

// Fetch image from the Docker registry
$ docker pull

// Build image
...

// Show all the images
$ docker images

// Remove image
$ docker rmi ${image}

### Container

// Run container
$ docker run ${image} ${command}

// Show all containers that are running/ or not 
$ docker ps
$ docker ps -a

// Remove container that have a status of exited
$ docker rm $(docker ps -a -q -f status=exited)
$ docker container prune

// Start the exited container
$ docker start -ai ${my_container}

## Webapp with Docker
### Static sites
#### Run

$ docker run --rm -it prakhar1989/static-site

`--rm` flag automatically removes the container when it exits.
`-it` flag specifies an interactive terminal which makes it easier to kill container.

$ docker run -d -P --name static-site prakhar1989/static-site

`-d` will detach our terminal
`-P` will publish all exposed ports to random ports
`--name `corresponds to a name we want to give.

#### See the port

$ docker port static-site

You can open http://localhost:32769 in your browser.

#### Stop detached container

$ docker stop static-site

### Docker compose
build docker-compose.yaml file

version: "3"
services:
  ollama:
    image: ollama/ollama:rocm
    container_name: ollama
    ports:
      - "11434:11434"
    volumes:
      - ollama:/root/.ollama
      - /home/sw/GitHub/Ollama/:/work/
    devices:
      - /dev/kfd
      - /dev/dri
    restart:
      always
  openwebui:
    image: ghcr.io/open-webui/open-webui:v0.4.6
    container_name: open-webui
    ports:
      - "3000:8080"
    volumes:
      - open-webui:/app/backend/data
    # extra_hosts:
    #   - "host.docker.interanl:host-gateway"
    restart:
      always

volumes:
  ollama:
    external: true
  open-webui:
    external: true

---

## Network and Docker Network

## Find Where is the Venv in Docker
Check the Base Image Structure: Run the base image interactively to inspect the environment setup:

docker run -it asrock/rocm-torch:6.2.1-2.6.0 /bin/bash

Check for existing virtual environments inside the container:

find / -name "activate" 2>/dev/null