Centos 7.0 安装 Dcoker

1. 准备工作

• 查看系统内核版本

官方建议Docker内核版本需大于3.8+

cat /proc/version
#Linux version 3.10.0-1062.1.2.el7.x86_64 (mockbuild@kbuilder.bsys.centos.org) (gcc version 4.8.5 20150623 (Red Hat 4.8.5-39) (GCC) ) #1 SMP Mon Sep 30 14:19:46 UTC 2019
uname -a
#Linux bep7 3.10.0-1062.1.2.el7.x86_64 #1 SMP Mon Sep 30 14:19:46 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
uname -r
#3.10.0-1062.1.2.el7.x86_64

• 删除旧版本的Docker

如已经安装Docker此操作会卸载Docker

sudo yum remove -y docker \
                docker-client \
                docker-client-latest \
                docker-common \
                docker-latest \
                docker-latest-logrotate \
                docker-logrotate \
                docker-selinux \
                docker-engine-selinux \
                docker-engine \
                ;

# 结果如下，表示未安装过Docker
Loaded plugins: fastestmirror
No Match for argument: docker
No Match for argument: docker-client
No Match for argument: docker-client-latest
No Match for argument: docker-common
No Match for argument: docker-latest
No Match for argument: docker-latest-logrotate
No Match for argument: docker-logrotate
No Match for argument: docker-selinux
No Match for argument: docker-engine-selinux
No Match for argument: docker-engine
No Packages marked for removal

2. 安装Dokcer-1.13.1

• 安装Docker

sudo yum install -y yum-utils device-mapper-persitent-data lvm2
sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
sudo yum install docker -y

• 修改配置文件 & 启动参数

# 修改 /etc/sysconfig/docker 文件
vim /etc/sysconfig/docker

# 将--selinux-enabled设置为false,不然可能会由于selinux服务不能用导致docker启动失败  
OPTIONS = '--selinux-enabled=false --log-driver=json-file --signature-verification=false'

修改systemd启动参数

# 这个启动参数是centos7自带的docker1.11.1版本需要的，会导致docker1.13.1启动失败
mv /etc/systemd/system/docker.service.d/execstart.conf /etc/systemd/system/docker.service.d/execstart.conf.cp
systemctl daemon-reload
systemctl enable docker && systemctl start docker

3. 验证安装

docker ps
docker images
docker search reids