docker随意记录（一）———— linux之Centos7安装docker

                                        Centos7安装docker

一、在线安装docker

1、查看linux发行版，内核

[root@localhost /]# cat /etc/redhat-release

CentOS Linux release 7.8.2003 (Core)

[root@localhost /]# uname -r

3.10.0-862.el7.x86_64

 

2、替换yum镜像（这里选择的是阿里云的）

#下载阿里yum源2

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

#生成仓库缓存

yum makecache 

 

3安装docker

yum install docker –y

 

4、启动docker

#启动docker

systemctl start docker

#开机启动

systemctl enable docker

#查看docker状态

systemctl status docker

 

5、验证

#查看docker版本

docker version

 

二、离线安装docker

Docker官方地址：docker down

将已下载好的docker离线包拷贝到服务器，解压压缩包

tar -xvf docker-18.09.6.tgz

将解压出来的docker文件内容移动到 /usr/bin/ 目录下

cp docker/* /usr/bin/

注册编辑docker服务

vim /etc/systemd/system/docker.service

写入以下内容后保存

[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

添加权限后启动

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

重新加载配置文件

systemctl daemon-reload

启动Docker

systemctl start docker

设置开机自启

systemctl enable docker.service

验证是否安装成功

systemctl status docker

docker -v