docker环境部署系列（〇）：docker安装

说明

此篇文章主要介绍docker的安装，docker使用的版本为v18.06，操作系统使用的版本为CentOS 7.5。
安装时，需将用户切换到root用户，以下所有的操作均在root用户下进行。

安装

有网情况

1. 安装前置内容

yum install -y yum-utils device-mapper-persistent-data lvm2
yum -y install vim-enhanced

2. 添加软件源信息

yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux    /centos/docker-ce.repo 

3. 更新并安装docker-ce

yum makecache fast
yum -y install docker-ce

4. 开启docker服务

systemctl start docker

5. 可以使用docker version命令查看docker版本号，检查docker是否安装成功
6. 设置开机自启动

systemctl enable docker.service 

无网情况

1. 下载docker的安装包，点击此处下载安装包，建议下载docker-18.06.1-ce.tgz
2. 上传docker-18.06.1-ce.tgz到目标服务器（假设将压缩包存放在：/root/docker）
3. 切换到/root/docker，解缩docker-18.06.1-ce.tgz

cd /root/docker
tar -xvf docker-18.06.1-ce.tgz

4. 复制docker目录下的文件到/usr/bin下

cp docker/* /usr/bin/

5. 创建docker的配置文件，并写入配置内容

vim /etc/systemd/system/docker.service

• 将以下内容写入docker.service

[Unit]

Description=Docker Application Container Engine

Documentation=https://docs.docker.com

After=network-online.target firewalld.service

Wants=network-online.target

[Service]

Type=notify

# the default is not to use systemd for cgroups because the delegate issues still

# exists and systemd currently does not support the cgroup feature set required

# for containers run by docker

ExecStart=/usr/bin/dockerd

ExecReload=/bin/kill -s HUP $MAINPID

# Having non-zero Limit*s causes performance problems due to accounting overhead

# in the kernel. We recommend using cgroups to do container-local accounting.

LimitNOFILE=infinity

LimitNPROC=infinity

LimitCORE=infinity

# Uncomment TasksMax if your systemd version supports it.

# Only systemd 226 and above support this version.

#TasksMax=infinity

TimeoutStartSec=0

# set delegate yes so that systemd does not reset the cgroups of docker containers

Delegate=yes

# kill only the docker process, not all processes in the cgroup

KillMode=process

# restart the docker process if it exits prematurely

Restart=on-failure

StartLimitBurst=3

StartLimitInterval=60s

 

[Install]

WantedBy=multi-user.target

6. 添加文件权限

chmod +x /etc/systemd/system/docker.service

7. 重载daemon配置文件

systemctl daemon-reload

8. 启动docker

systemctl start docker

9. 设置开机自启动

systemctl enable docker.service

10. 查看docker状态，验证安装是否成功

systemctl status docker

• 提示以下内容代表docker安装成功