120 lines
2.6 KiB
Markdown
120 lines
2.6 KiB
Markdown
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## Centos安装 Docker
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从 2017 年 3 月开始 docker 在原来的基础上分为两个分支版本: Docker CE 和 Docker EE。
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Docker CE 即社区免费版，Docker EE 即企业版，强调安全，但需付费使用。
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本文介绍 Docker CE 的安装使用。
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移除旧的版本：
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```shell
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sudo yum 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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安装一些必要的系统工具：
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```shell
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sudo yum install -y yum-utils device-mapper-persistent-data lvm2
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```
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添加软件源信息：
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```shell
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sudo yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
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```
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更新 yum 缓存：
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```shell
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# centos 7
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sudo yum makecache fast
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# CentOS 8没有fast这个命令
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sudo yum makecache
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```
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安装 Docker-ce：
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```shell
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sudo yum -y install docker-ce
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```
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查看已安装docker版本
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```shell
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docker version
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```
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启动 Docker 后台服务
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```shell
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sudo systemctl start docker
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```
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开机启动
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```shell
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sudo systemctl enable docker
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```
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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，我们可以需要配置加速器来解决。
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可以使用阿里云的docker镜像地址：https://7qyk8phi.mirror.aliyuncs.com
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新版的 Docker 使用 `/etc/docker/daemon.json`（Linux，没有请新建）。
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请在该配置文件中加入：
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（没有该文件的话，请先建一个）
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```json
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{
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"registry-mirrors": ["https://7qyk8phi.mirror.aliyuncs.com"],
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"log-driver": "json-file",
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"log-opts": {
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"max-size": "100m","max-file": "1"
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}
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}
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```
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重启docker
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```shell
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sudo systemctl daemon-reload
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sudo systemctl restart docker
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```
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### 检查加速器是否生效
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配置加速器之后，如果拉取镜像仍然十分缓慢，请手动检查加速器配置是否生效，在命令行执行 `docker info`，如果从结果中看到了如下内容，说明配置成功。
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```shell
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Registry Mirrors:
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https://7qyk8phi.mirror.aliyuncs.com/
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```
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### 下载docker-compose
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```shell
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#运行此命令以下载 Docker Compose 的当前稳定版本
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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
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#对二进制文件应用可执行权限
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sudo chmod +x /usr/local/bin/docker-compose
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#测试安装
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docker-compose --version
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#若有docker-compose version 1.29.2, build 5becea4c，则安装成功
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```
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