查看系统版本

[root@dc02 ~]# cat /etc/redhat-release
CentOS Linux release 7.2.1511 (Core)

查看内核版本

[root@dc02 ~]# uname -r
3.10.0-327.el7.x86_64

关闭selinux和防火墙

setenforce 0
sed -i 's#SELINUX=enforcing#SELINUX=disabled#' /etc/selinux/config
systemctl disable firewalld.service
systemctl stop firewalld.service

下载docker

[root@dc02 ~]# yum install -y docker

替换国内加速器

[root@dc02 ~]# cat >/etc/docker/daemon.json <

{
"registry-mirrors": ["https://docker.mirrors.ustc.edu.cn"]
}
EOF
[root@dc02 ~]# cat /etc/docker/daemon.json
{
"registry-mirrors": ["https://docker.mirrors.ustc.edu.cn"]
}

加载生效

[root@dc02 ~]# systemctl daemon-reload

自启动

[root@dc02 ~]# systemctl enable docker
[root@dc02 ~]# systemctl start docker

查看状态

[root@dc02 ~]# systemctl status docker

下载官方centos镜像

[root@dc02 ~]# docker pull centos
Using default tag: latest
Trying to pull repository docker.io/library/centos ...
latest: Pulling from docker.io/library/centos
7dc0dca2b151: Pull complete
Digest: sha256:b67d21dfe609ddacf404589e04631d90a342921e81c40aeaf3391f6717fa5322
Status: Downloaded newer image for docker.io/centos:latest

查看所有下载镜像

[root@dc02 ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
docker.io/centos latest 49f7960eb7e4 7 weeks ago 200 MB

启动并进入镜像

[root@dc02 ~]# docker run -it --name mynginx centos /bin/bash

安装常用命令

[root@9d76d200aae9 /]# yum install -y wget vim
[root@9d76d200aae9 /]# wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
[root@9d76d200aae9 /]# wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo

安装nginx

[root@9d76d200aae9 /]# yum install -y nginx
#docker默认禁止后台运行nginx
[root@9d76d200aae9 /]# vim /etc/nginx/nginx.conf
#在"user nginx;"下面加上一行"daemon off;"

检查nginx配置文件语法

[root@9d76d200aae9 /]# nginx -t

启动nginx

[root@9d76d200aae9 /]# nginx
启动后命令行是夯筑的，所以打开一个新的SSH连接查看镜像

启动后命令行是夯筑的，所以打开一个新的SSH连接查看镜像

[root@dc02 ~]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
9d76d200aae9 centos "/bin/bash" 14 minutes ago Up 14 minutes mynginx

提交镜像并查看

[root@dc02 ~]# docker commit -m "add new docker images" mynginx test/nginx:v1
sha256:5e28845136a33dc8e6175248086a90f9195dda4bdfc014a89b7ee32e37cc24d0
[root@dc02 ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
test/nginx v1 5e28845136a3 About a minute ago 420 MB
docker.io/centos latest 49f7960eb7e4 7 weeks ago 200 MB

测试nginx连通性
[root@dc02 ~]# docker run -p 80:80 --name test_nginx 5e28845136a3 nginx

原文出处转载链接