# DOCKER 環境安裝

## :memo: Where do I start?

### 1. 安裝 UBUNTU 20.04 (以國網TWCC為範例)

### 2. Docker 安裝
- 更新及安裝相關套件

sudo apt-get -y update
sudo apt-get -y upgrade
sudo apt-get -y install ca-certificates curl gnupg lsb-release rsync zip unzip 

- Docker 安裝

curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg

echo \
  "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/ubuntu \
  $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

sudo apt-get update -y
sudo apt-get -y install docker-ce docker-ce-cli containerd.io

- 加入 Docker 群組

sudo groupadd docker
sudo usermod -aG docker $USER
sudo systemctl enable docker  # 啟動 Docker 服務
sudo docker --version

- 安裝 Docker Composer

sudo curl -L "https://github.com/docker/compose/releases/download/1.29.2/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
sudo chmod +x /usr/local/bin/docker-compose

sudo ln -s /usr/local/bin/docker-compose /usr/bin/docker-compose

docker-compose --version

- 測試安裝結果, (需切換身分或從新登入帳號)

sudo su 
su ubuntu
docker run hello-world

### 3. 如何用DOKCER啟動容器 (container)
1. 背景執行容器範例

docker run --name demo_container -d ${IMAGE} bash 

2. 互動執行範例, 離開後自動關閉容器

docker run --name demo_container --rm -it ${IMAGE} bash 

3. 直接執行範例 , 執行後自動關閉容器

docker run --rm ${IMAGE} bash -c "${cmd}"

4. 連線至已經在背景執行容器範例 (最後為bash 或 sh)

docker exec -it demo_container bash 

6. 複製容器成IMAGE

docker commit  demo_container c00cjz00/cuda:11.8 

7. 推播IMAGE 至 DOCKER HUB

docker login
docker push c00cjz00/cuda:11.8 

8. 容器開關

#關閉容器demo_container
docker stop demo_container

#開啟容器demo_container
docker start demo_container

#重啟容器demo_container
docker restart demo_container

#刪除容器demo_container
docker rm demo_container

#刪除映像檔
docker rm $IMAGEID