DevOps技术

[【原文链接】centos-ssh容器镜像使用方法]()

[TOC]

## 一、redrose2100/centos-ssh 镜像简介
redrose2100/centos-ssh的镜像仓库见 [redrose2100/centos-ssh](https://hub.docker.com/repository/docker/redrose2100/centos-ssh) ，它为在centos 7 镜像额基础上安装好sshd服务的镜像，并且设置了用户名root的密码为Admin123456，通过拉取此镜像即可直接启动可以ssh的容器。镜像的tag值与CentOS7的镜像的tag值保持一致

## 二、redrose2100/centos-ssh 镜像应用
（1）创建一个网络，如下创建一个名为staticnet的网络，网段为172.18.0.0/16
```bash
docker network create --subnet=172.18.0.0/16 staticnet
```

（2）查看网络如下
```bash
[root@centos7-1 ~]# docker network ls
NETWORK ID     NAME        DRIVER    SCOPE
0eb4f2b7af54   bridge      bridge    local
be204ec4735f   host        host      local
1df66d2f7b49   none        null      local
d6f5c693f28d   staticnet   bridge    local
[root@centos7-1 ~]#
```

（3）启动容器，指定网络同时设置容器的ip地址
```bash
docker run -d --name=vm1 --privileged --net staticnet --ip 172.18.0.100 redrose2100/centos-ssh:7.9.2009 /usr/sbin/sshd -D
```

（4）查看容器，如下，创建成功
```bash
[root@centos7-1 ~]# docker ps
CONTAINER ID   IMAGE                             COMMAND               CREATED          STATUS          PORTS     NAMES
1771e09b6153   redrose2100/centos-ssh:7.9.2009   "/usr/sbin/sshd -D"   10 minutes ago   Up 10 minutes             vm1
[root@centos7-1 ~]#
```

（5）如下，通过ssh命令即可登录到容器，而且容器的ip地址配置也已经生效了
```bash
[root@centos7-1 ~]# ssh -o "StrictHostKeyChecking=no" root@172.18.0.100
root@172.18.0.100's password:
Last failed login: Tue Dec 13 09:21:32 UTC 2022 from 172.18.0.1 on ssh:notty
There was 1 failed login attempt since the last successful login.

Welcome to 3.10.0-1160.el7.x86_64

System information as of time:  Tue Dec 13 09:21:56 AM UTC 2022

System load:    0.03
Processes:      8
Memory used:    19.6%
Swap used:      .2%
Usage On:       31%
Users online:   0

[root@60fbd371e02c ~]# ifconfig
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 172.18.0.100  netmask 255.255.0.0  broadcast 172.18.255.255
        ether 02:42:ac:12:00:64  txqueuelen 0  (Ethernet)
        RX packets 62  bytes 9502 (9.2 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 41  bytes 8108 (7.9 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

[root@60fbd371e02c ~]#
```

不积跬步，无以至千里

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