Docker CE安裝（ununtu）

docker 安裝前準備-操做系統列表須要知足以下版本的ubuntu

• Cosmic 18.10
• Bionic 18.04 (LTS)
• Xenial 16.04 (LTS)

卸載舊版本docker，若是安裝過的請操做以下，若是使用普通帳號執行，請按以下操做，若是有root權限請忽略sudo，系統首次安裝請略過此步驟

$ sudo apt-get remove docker docker-engine docker.io containerd runc

安裝docker ce

1.設置倉庫

$ sudo apt-get update

2. 安裝包容許apt經過HTTPS使用存儲庫

$ sudo apt-get install apt-transport-https ca-certificates curl gnupg-agent software-properties-common

3. 添加Docker的官方GPG密鑰

$ curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -

4.驗證祕鑰

$ sudo apt-key fingerprint 0EBFCD88

有以下顯示：證實安裝成功

pub   rsa4096 2017-02-22 [SCEA]
      9DC8 5822 9FC7 DD38 854A  E2D8 8D81 803C 0EBF CD88
uid           [ unknown] Docker Release (CE deb) <docker@docker.com>
sub   rsa4096 2017-02-22 [S]

5.安裝穩定版倉庫

$ sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"

6.安裝docker ce

#更新apt包索引
$ sudo apt-get update

7.安裝最新版本docker ce或者跳到下步安裝指定版本

$ sudo apt-get install docker-ce docker-ce-cli containerd.io

8.安裝指定版本的docker ce

$ apt-cache madison docker-ce

docker-ce | 5:18.09.6~3-0~ubuntu-bionic | https://mirrors.ustc.edu.cn/docker-ce/linux/ubuntu bionic/stable amd64 Packages
docker-ce | 5:18.09.5~3-0~ubuntu-bionic | https://mirrors.ustc.edu.cn/docker-ce/linux/ubuntu bionic/stable amd64 Packages
docker-ce | 5:18.09.4~3-0~ubuntu-bionic | https://mirrors.ustc.edu.cn/docker-ce/linux/ubuntu bionic/stable amd64 Packages
docker-ce | 5:18.09.3~3-0~ubuntu-bionic | https://mirrors.ustc.edu.cn/docker-ce/linux/ubuntu bionic/stable amd64 Packages
docker-ce | 5:18.09.2~3-0~ubuntu-bionic | https://mirrors.ustc.edu.cn/docker-ce/linux/ubuntu bionic/stable amd64 Packages
docker-ce | 5:18.09.1~3-0~ubuntu-bionic | https://mirrors.ustc.edu.cn/docker-ce/linux/ubuntu bionic/stable amd64 Packages
docker-ce | 5:18.09.0~3-0~ubuntu-bionic | https://mirrors.ustc.edu.cn/docker-ce/linux/ubuntu bionic/stable amd64 Packages
docker-ce | 18.06.3~ce~3-0~ubuntu | https://mirrors.ustc.edu.cn/docker-ce/linux/ubuntu bionic/stable amd64 Packages
docker-ce | 18.06.2~ce~3-0~ubuntu | https://mirrors.ustc.edu.cn/docker-ce/linux/ubuntu bionic/stable amd64 Packages
docker-ce | 18.06.1~ce~3-0~ubuntu | https://mirrors.ustc.edu.cn/docker-ce/linux/ubuntu bionic/stable amd64 Packages
docker-ce | 18.06.0~ce~3-0~ubuntu | https://mirrors.ustc.edu.cn/docker-ce/linux/ubuntu bionic/stable amd64 Packages
docker-ce | 18.03.1~ce~3-0~ubuntu | https://mirrors.ustc.edu.cn/docker-ce/linux/ubuntu bionic/stable amd64 Packages

以5:18.09.6~3-0~ubuntu-bionic版本爲例，執行以下命令

$ sudo apt-get install docker-ce=5:18.09.6~3-0~ubuntu-bionic docker-ce-cli=5:18.09.6~3-0~ubuntu-bionic containerd.io

9.運行測試實例，hello-world鏡像,若是沒有該鏡像會自動下載

$ sudo docker run hello-world

Unable to find image 'hello-world:latest' locally
latest: Pulling from library/hello-world
1b930d010525: Pull complete 
Digest: sha256:41a65640635299bab090f783209c1e3a3f11934cf7756b09cb2f1e02147c6ed8
Status: Downloaded newer image for hello-world:latest

Hello from Docker!
This message shows that your installation appears to be working correctly.

To generate this message, Docker took the following steps:
 1. The Docker client contacted the Docker daemon.
 2. The Docker daemon pulled the "hello-world" image from the Docker Hub.
    (amd64)
 3. The Docker daemon created a new container from that image which runs the
    executable that produces the output you are currently reading.
 4. The Docker daemon streamed that output to the Docker client, which sent it
    to your terminal.

To try something more ambitious, you can run an Ubuntu container with:
 $ docker run -it ubuntu bash

Share images, automate workflows, and more with a free Docker ID:
 https://hub.docker.com/

For more examples and ideas, visit:
 https://docs.docker.com/get-started/

介紹下卸載docker ce

1.卸載docker ce

$ sudo apt-get purge docker-ce

2. 主機上的映像、容器、卷或自定義配置文件不會自動刪除。刪除全部圖像、容器和卷

$ sudo rm -rf /var/lib/docker