1、查找镜像源
$ docker search centos
NAME DESCRIPTION STARS OFFICIAL
centos The official build of CentOS. 3857 [OK]

2、下载镜像
docker pull centos

3、查看已下载的镜像
$ docker image ls
REPOSITORY TAG IMAGE ID CREATED SIZE
centos latest 3fa822599e10 6 days ago 204MB

4、启动镜像
$ docker run -itd centos /bin/bash
bce6d9a692b26fdf5f7642303c26ffdcaf26917cbfde703dea5c152c320f375d
$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS
bce6d9a692b2 centos "/bin/bash" About a minute ago Up About a minute

5、进入centos容器
$ docker attach bce6d9a692b2
[root@bce6d9a692b2 /]#
[root@bce6d9a692b2 /]#

6、centos默认没有ifconfig命令，配置ifconfig
[root@bce6d9a692b2 /]# ifconfig
bash: ifconfig: command not found
[root@bce6d9a692b2 /]#
[root@bce6d9a692b2 /]# yum search ifconfig
Loaded plugins: fastestmirror, ovl
base | 3.6 kB 00:00:00
extras | 3.4 kB 00:00:00
updates | 3.4 kB 00:00:00
(1/4): extras/7/x86_64/primary_db | 130 kB 00:00:01
(2/4): base/7/x86_64/group_gz | 156 kB 00:00:01
(3/4): updates/7/x86_64/primary_db | 3.8 MB 00:00:17
(4/4): base/7/x86_64/primary_db | 5.7 MB 00:00:21
Determining fastest mirrors
* base: centos.ustc.edu.cn
* extras: centos.ustc.edu.cn
* updates: mirrors.aliyun.com
==================================================== Matched: ifconfig ==================================================
net-tools.x86_64 : Basic networking tools
[root@bce6d9a692b2 /]#
[root@bce6d9a692b2 /]#
[root@bce6d9a692b2 /]# yum install net-tools.x86_64
[root@bce6d9a692b2 /]# ifconfig
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 172.17.0.3 netmask 255.255.0.0 broadcast 0.0.0.0
ether 02:42:ac:11:00:03 txqueuelen 0 (Ethernet)
RX packets 7560 bytes 11081500 (10.5 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 5595 bytes 305703 (298.5 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

7、配置ssh
a、修改Centos root密码
# passwdChanging password for user root.New password: 123456BAD PASSWORD: The password is shorter than 8 charactersRetype new password: 123456passwd: all authentication tokens updated successfully.
b、安装openssh
yum install openssh-server -y
 c、生成公钥、私钥
[root@378ab88a06c8 /]# ssh-keygen -t rsa -f /etc/ssh/ssh_host_rsa_keyGenerating public/private rsa key pair.Enter passphrase (empty for no passphrase): (直接回车)Enter same passphrase again: (直接回车)Your identification has been saved in /etc/ssh/ssh_host_rsa_key.Your public key has been saved in /etc/ssh/ssh_host_rsa_key.pub.The key fingerprint is:33:3c:34:49:e4:76:7d:45:cc:69:ac:46:85:ab:27:9e root@378ab88a06c8The key's randomart image is:+--[ RSA 2048]----+| .o +=+|| o . . o =o|| * . o = || + o = || S o || + o . || . + || E || |+-----------------+
[root@378ab88a06c8 /]# ssh-keygen -t rsa -f /etc/ssh/ssh_host_ecdsa_keyGenerating public/private rsa key pair.Enter passphrase (empty for no passphrase): (直接回车)Enter same passphrase again: (直接回车)Your identification has been saved in /etc/ssh/ssh_host_ecdsa_key.Your public key has been saved in /etc/ssh/ssh_host_ecdsa_key.pub.The key fingerprint is:09:ac:b0:61:55:de:e8:4f:5e:20:d9:fc:1e:b6:d7:79 root@378ab88a06c8The key's randomart image is:+--[ RSA 2048]----+| ... || . o * || + B = || . + o o + || . . . S = || + + o . . || o o . o E|| . . || |+-----------------+
[root@378ab88a06c8 /]# ssh-keygen -t rsa -f /etc/ssh/ssh_host_ed25519_keyGenerating public/private rsa key pair.Enter passphrase (empty for no passphrase): (直接回车)Enter same passphrase again: (直接回车)Your identification has been saved in /etc/ssh/ssh_host_ed25519_key.Your public key has been saved in /etc/ssh/ssh_host_ed25519_key.pub.The key fingerprint is:63:0d:b5:fb:55:a4:56:47:43:6d:68:c0:47:2e:84:24 root@378ab88a06c8The key's randomart image is:+--[ RSA 2048]----+| E.ooooo=*|| o.o..++=|| . . .o+..|| o . o . || S o . || . . . . || . || || |+-----------------+

d、编写启动脚本
# vi /run.sh#!/bin/bash/usr/sbin/sshd -D# chmod +x /run.sh

e、退出容器，保存镜像
$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS
bce6d9a692b2 centos "/bin/bash" About a minute ago Up About a minute
#从容器退出，但不停止容器: Ctrl+P+Q
[root@default ~]#
[root@default ~]#
$
$ docker ps

#回到Docker下面，停止容器: docker stop <容器ID>
$ docker stop bce6d9a692b2
bce6d9a692b2
#提交当前容器到镜像: docker commit <容器ID> <NAME:VERSION>

$ docker commit bce6d9a692b2 centos_me:v1.0
$ docker image ls
REPOSITORY TAG IMAGE ID CREATED SIZE
centos_me v1.0 4569dd302889 38 minutes ago 366MB

f、重新启动容器
$ docker run --net=host --name hdoop0 -d -p 5001:22 centos_me:v1.0 /run.sh
备注：1、“-p 5001:22” 是将容器的ssh端口22映射都宿主主机的5001端口上
2、‘--name hdoop0’重命名容器名

或者：docker run --name hadoop2 -d -p 5002:22 centos_me:v1.0 /usr/sbin/sshd -D

g、远程连接测试

原文参考：https://blog.csdn.net/yangym2002/article/details/79000241