Add Fedora
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* [安装 Docker](install/README.md)
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* [Ubuntu](install/ubuntu.md)
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* [Debian](install/debian.md)
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* [Fedora](install/fedora.md)
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* [CentOS](install/centos.md)
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* [Raspberry Pi](install/raspberry-pi.md)
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* [macOS](install/mac.md)
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@ -0,0 +1,170 @@
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## Fedora 安装 Docker CE
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>警告：切勿在没有配置 Docker dnf 源的情况下直接使用 dnf 命令安装 Docker.
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### 准备工作
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#### 系统要求
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Docker CE 支持以下版本的 [Fedora](https://fedoraproject.org/) 操作系统：
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* 26
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* 27
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* 28
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#### 卸载旧版本
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旧版本的 Docker 称为 `docker` 或者 `docker-engine`，使用以下命令卸载旧版本：
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```bash
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$ sudo dnf remove docker \
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docker-client \
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docker-client-latest \
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docker-common \
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docker-latest \
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docker-latest-logrotate \
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docker-logrotate \
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docker-selinux \
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docker-engine-selinux \
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docker-engine
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```
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### 使用 dnf 安装
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执行以下命令安装依赖包：
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```bash
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$ sudo dnf -y install dnf-plugins-core
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```
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鉴于国内网络问题，强烈建议使用国内源，官方源请在注释中查看。
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执行下面的命令添加 `dnf 软件源：
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```bash
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$ sudo dnf config-manager \
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--add-repo \
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https://mirrors.ustc.edu.cn/docker-ce/linux/fedora/docker-ce.repo
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# 官方源
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# $ sudo dnf config-manager \
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# --add-repo \
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# https://download.docker.com/linux/fedora/docker-ce.repo
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```
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如果需要测试版本的 Docker CE 请使用以下命令：
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```bash
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$ sudo dnf config-manager --set-enabled docker-ce-test
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```
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如果需要每日构建版本的 Docker CE 请使用以下命令：
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```bash
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$ sudo dnf config-manager --set-enabled docker-ce-nightly
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```
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你也可以禁用测试版本的 Docker CE
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```bash
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$ sudo dnf config-manager --set-disabled docker-ce-test
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```
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#### 安装 Docker CE
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更新 `dnf` 软件源缓存，并安装 `docker-ce`。
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```bash
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$ sudo dnf update
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$ sudo dnf install docker-ce
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```
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你也可以使用以下命令安装指定版本的 Docker
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```bash
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$ dnf list docker-ce --showduplicates | sort -r
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docker-ce.x86_64 18.06.1.ce-3.fc28 docker-ce-stable
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$ sudo dnf -y install docker-ce-18.06.1.ce
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```
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### 使用脚本自动安装
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在测试或开发环境中 Docker 官方为了简化安装流程，提供了一套便捷的安装脚本，Debian 系统上可以使用这套脚本安装：
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```bash
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$ curl -fsSL get.docker.com -o get-docker.sh
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$ sudo sh get-docker.sh --mirror Aliyun
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```
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执行这个命令后，脚本就会自动的将一切准备工作做好，并且把 Docker CE 最新版本安装在系统中。
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### 启动 Docker CE
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```bash
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$ sudo systemctl enable docker
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$ sudo systemctl start docker
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```
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### 建立 docker 用户组
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默认情况下，`docker` 命令会使用 [Unix socket](https://en.wikipedia.org/wiki/Unix_domain_socket) 与 Docker 引擎通讯。而只有 `root` 用户和 `docker` 组的用户才可以访问 Docker 引擎的 Unix socket。出于安全考虑，一般 Linux 系统上不会直接使用 `root` 用户。因此，更好地做法是将需要使用 `docker` 的用户加入 `docker` 用户组。
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建立 `docker` 组：
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```bash
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$ sudo groupadd docker
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```
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将当前用户加入 `docker` 组：
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```bash
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$ sudo usermod -aG docker $USER
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```
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退出当前终端并重新登录，进行如下测试。
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### 测试 Docker 是否安装正确
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```bash
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$ docker run hello-world
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Unable to find image 'hello-world:latest' locally
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latest: Pulling from library/hello-world
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d1725b59e92d: Pull complete
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Digest: sha256:0add3ace90ecb4adbf7777e9aacf18357296e799f81cabc9fde470971e499788
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Status: Downloaded newer image for hello-world:latest
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Hello from Docker!
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This message shows that your installation appears to be working correctly.
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To generate this message, Docker took the following steps:
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1. The Docker client contacted the Docker daemon.
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2. The Docker daemon pulled the "hello-world" image from the Docker Hub.
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(amd64)
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3. The Docker daemon created a new container from that image which runs the
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executable that produces the output you are currently reading.
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4. The Docker daemon streamed that output to the Docker client, which sent it
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to your terminal.
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To try something more ambitious, you can run an Ubuntu container with:
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$ docker run -it ubuntu bash
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Share images, automate workflows, and more with a free Docker ID:
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https://hub.docker.com/
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For more examples and ideas, visit:
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https://docs.docker.com/get-started/
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```
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若能正常输出以上信息，则说明安装成功。
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### 镜像加速
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鉴于国内网络问题，后续拉取 Docker 镜像十分缓慢，强烈建议安装 Docker 之后配置 [国内镜像加速](mirror.md)。
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### 参考文档
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* [Docker 官方 Fedora 安装文档](https://docs.docker.com/install/linux/docker-ce/fedora)。
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