Docker学习之CentOS8安装Docker

检查前提条件

检查内核版本是否高于3.8

uname -a

检查Device Mapper

ls -l /sys/class/misc/device-mapper

或者

grep device-mapper /proc/devices

若无，请安装

yum install -y device-mapper

安装完成后，加载dm_mod内核模块

modprobe dm_mod

安装Docker

设置阿里源

curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-8.repo

安装依赖

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

添加docker-ce的yum仓库

yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
yum makecache

安装docker-ce

yum install docker-ce

启动并设置开机自启动

systemctl start docker
systemctl enable --now docker

查看Docker运行状态

docker info

显示如下打印

Server:
 Containers: 0
  Running: 0
  Paused: 0
  Stopped: 0
 Images: 0
 Server Version: 19.03.13
 Storage Driver: overlay2
  Backing Filesystem: xfs
  Supports d_type: true
  Native Overlay Diff: true
 Logging Driver: json-file
 Cgroup Driver: cgroupfs
 Plugins:
  Volume: local
  Network: bridge host ipvlan macvlan null overlay
  Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog
 Swarm: inactive
 Runtimes: runc
 Default Runtime: runc
 Init Binary: docker-init
 containerd version: 8fba4e9a7d01810a393d5d25a3621dc101981175
 runc version: dc9208a3303feef5b3839f4323d9beb36df0a9dd
 init version: fec3683
 Security Options:
  seccomp
   Profile: default
 Kernel Version: 4.18.0-193.14.2.el8_2.x86_64
 Operating System: CentOS Linux 8 (Core)
 OSType: linux
 Architecture: x86_64
 CPUs: 1
 Total Memory: 791.5MiB
 Name: localhost.localdomain
 ID: YXYV:NBGI:LTFS:X3F7:Y7MN:OSHA:APHW:GA3Q:DOEB:7BCZ:FWDK:UON2
 Docker Root Dir: /var/lib/docker
 Debug Mode: false
 Registry: https://index.docker.io/v1/
 Labels:
 Experimental: false
 Insecure Registries:
  127.0.0.0/8
 Live Restore Enabled: false