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# docker 环境配置
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+> ubuntu 18.04.1
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+> 与官网具体讲解不同,本文略去了大量细节介绍,具体看官方教程
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+> [参考链接](https://docs.docker.com/engine/install/ubuntu/#set-up-the-repository)
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+
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+## 安装普通 docker
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+### 1. 移除可能安装的旧版本`docker`相关程序
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+> 这一步可以不需要,如果新机器的话
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+```shell
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+sudo apt-get remove docker docker-engine docker.io containerd runc
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+```
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+### 2. 更新基础依赖
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+更新`apt`仓库
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+```shell
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+sudo apt-get update
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+```
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+安装基础依赖
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+```shell
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+sudo apt-get install \
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+ ca-certificates \
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+ curl \
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+ gnupg \
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+ lsb-release
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+```
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+### 3. 设置`GPG key`
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+这段功能没细看
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+```shell
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+sudo mkdir -m 0755 -p /etc/apt/keyrings
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+curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg
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+```
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+
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+### 4. 使用`docker`仓库
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+这段代码也没细看,官网表示跟着输入就行
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+```shell
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+echo \
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+ "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu \
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+ $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
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+```
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+
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+### 5. 更新依赖
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+```shell
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+sudo apt-get update
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+```
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+> [!tip] 如果执行`update`命令报错提示`GPG`什么的,可能是下面原因
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+> Your default umask may be incorrectly configured,
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+> preventing detection of the repository public key file.
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+> Try granting read permission for the Docker public key file before updating the package index:
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+
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+可执行的错误修改代码
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+```shell
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+sudo chmod a+r /etc/apt/keyrings/docker.gpg
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+sudo apt-get update
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+```
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+
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+### 6. 安装docker
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+<!-- tabs:start -->
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+#### **稳定版`latest`**
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+##### 1.安装
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+```shell
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+sudo apt-get install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
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+```
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+##### 2. 测试
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+> 感觉没什么必要
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+```shell
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+sudo docker run hello-world
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+```
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+#### **指定版本**
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+##### 1. 列出指定版本
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+```shell
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+# List the available versions:
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+apt-cache madison docker-ce | awk '{ print $3 }'
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+```
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+可能返回的结果
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+```
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+5:20.10.16~3-0~ubuntu-jammy
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+5:20.10.15~3-0~ubuntu-jammy
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+5:20.10.14~3-0~ubuntu-jammy
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+5:20.10.13~3-0~ubuntu-jammy
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+```
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+##### 2. 选择安装指定版本
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+```shell
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+VERSION_STRING=5:20.10.13~3-0~ubuntu-jammy
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+sudo apt-get install docker-ce=$VERSION_STRING docker-ce-cli=$VERSION_STRING containerd.io docker-buildx-plugin docker-compose-plugin
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+```
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+##### 3. 测试...
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+<!-- tabs:end -->
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