# Docker-User-Guide
###### tags: `tutorials` `docker`
## Downloads
[Docker for Windows / Linux](https://www.docker.com/)
[OrbStack for Mac](https://orbstack.dev/)
## Links
[Installing Docker from the Default Repositories (Option 2)](https://phoenixnap.com/kb/install-docker-on-ubuntu-20-04)
[進入容器 - 《Docker —— 從入門到實踐》正體中文版](https://philipzheng.gitbook.io/docker_practice/)
[Docker 基本指令操作](https://ithelp.ithome.com.tw/articles/10186431)
[Docker 實戰系列（一）：一步一步帶你 dockerize 你的應用](https://larrylu.blog/step-by-step-dockerize-your-app-ecd8940696f4)
## Basic
Create new container
```
(default)
docker run -i -t [images]
(run in background)
docker run -d [images]
```
Check container
```
(list active container)
docker ps
(list all containers)
docker ps -a
```
Start container
```
docker start -i [container id]
```
Remove container
```
docker rm [container id]
```
## Run
https://docs.docker.com/engine/reference/commandline/run/
## Easy Example
Create `<workspace_folder>`
Put code in `<workspace_folder>`
Create new code called `Dockerfile`
```
<workspace_folder>
├── Dockerfile <-- here這裡
├── README.md
└── main.py
```
Base on you environment defined `Dockerfile` code
```Dockerfile
(For example)
FROM python
COPY main.py /main/
WORKDIR /main
RUN apt-get update && apt-get -y upgrade
RUN pip install numpy
CMD python main.py
```
Open CMD
Get into `<workspace_folder>`
Build your own image.
Type in
```
docker build -t <workspace_folder> .
```
Check new docker image created
```
docker images
```
Run your own image
```
docker run <workspace_folder>
```
Push image
```
docker tag docker/welcome-to-docker YOUR-USERNAME/welcome-to-docker
```
## Container connet to local folder
**DO NOT OPEN `WSL`** on windows terminal, it will cause error `docker: Error response from daemon`
https://docs.docker.com/storage/bind-mounts/
windows path conversion https://docs.docker.com/desktop/troubleshoot/topics/
```
<method 1> use -v
docker run -it --name <container_name> -v <local_folder>:<container_folder> --gpus all -u 0 --shm-size 12G <image_id> bash
(windows) docker run -it --name test111 -v C:\Users\user\Desktop\mmlab\code\test:/main --gpus all -u 0 --shm-size 12G test bash
(linux/mac) docker run -it --name kmeans -v /User/weichenpai/Code/Kmeans-Clustering:/Kmeans 3f5ef9003cef bash
<method 2> use --mount
docker run -it --name <container_name> --mount type=bind,source=<local_folder>,target=<container_folder> --gpus all -u 0 --shm-size 12G <image_id> bash
(windows) docker run -it --name mount_test --mount type=bind,source=C:\Users\user\Desktop\mmlab\code\test,target=/main --gpus all -u 0 --shm-size 12G test bash
```
## Errors
[docker环境里安装opencv ImportError: libGL.so.1: cannot open shared object file: No such file or directory](https://blog.csdn.net/Max_ZhangJF/article/details/108920050)
```
<error message>
ImportError: libGL.so.1: cannot open shared object file: No such file or directory
<solution>
pip uninstall opencv-python
pip install opencv-python-headless
```
## For MacOS
[Docker command not found when running on Mac](https://stackoverflow.com/a/76097028).
Add your Docker binary path
```
export PATH="$PATH:/Applications/Docker.app/Contents/Resources/bin/"
```
Then reload the configuration & test with:
```
source ~/.bash_profile && docker --version
```
[Mac zsh: command not found: docker](https://blog.csdn.net/qq_45296221/article/details/122191265).
Find `docker` command path, for example:
```
/Applications/Docker.app/Contents/Resources/bin
```
Edit PATHs file, use `i` insert
```
sudo vim /etc/paths
```
Add `docker` path into PATHs file
```
/usr/local/bin
/System/Cryptexes/App/usr/bin
/usr/bin
/bin
/usr/sbin
/sbin
# docker
/Applications/Docker.app/Contents/Resources/bin
```
Use `:wq` save & exit, complete adding path.
[Fixing the ‘Mounts denied’ error in Docker for Mac v2.2.3](https://medium.com/effy-tech/fixing-the-var-folders-error-in-docker-for-mac-v2-2-3-2a40e776132d).
The solution is to manually edit the configuration file for your docker installation.
```
cd Library/Group\ Containers/group.com.docker/
```
Edit `settings.json`
```
sudo vim settings.json
```
Find below section:
```
"filesharingDirectories": [
"/Users",
"/Volumes",
"/private",
"/tmp",
"/var/folders"
],
```
Add path you want to add, for exampple :`"/Users/<yours_username>/Code"`.
```
"filesharingDirectories": [
"/Users",
"/Volumes",
"/private",
"/tmp",
"/var/folders",
"/Users/<yours_username>/Code"
],
```
Save the file and exit, `:wq`. Now restart your Docker.
[File system sharing (osxfs)](https://docs.docker.com.zh.xy2401.com/v17.09/docker-for-mac/osxfs/#access-control)
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