使用docker启动一台centos7

获取centos7镜像

首先先搞一个centos7的镜像

先搜索找到下载一个centos
[root@scyun-node-1 docker]# docker search centos7
NAME                                DESCRIPTION                                     STARS               OFFICIAL            AUTOMATED
ansible/centos7-ansible             Ansible on Centos7                              134                                     [OK]
rpmbuild/centos7                    CentOS 7 RPM package building environment       16                                      
flyceek/centos7-jdk                 centos7-jdk                                     5                                       [OK]
paigeeworld/centos7                 Centos7 with apache, iperf3, nmap, ssh          5

下载centos7镜像
[root@scyun-node-1 docker]# docker pull ansible/centos7-ansible
或者导入一个centos7镜像
[root@scyun-node-1 docker]# docker load<centos7-ansible.tar

启动centos7镜像

[root@scyun-node-1 docker]# docker run -itd -p 60022:22 --name=centos7-1 --privileged centos7-ansible:latest
6726ac4ac654e26cc4dba3306242e425cd235fef4397d2c27e0a80d767e2f4d8

##查看centos容器IP
[root@scyun-node-1 docker]# docker inspect centos7-1|grep -aiE "ipaddr" |tail -1

ssh远程连接22端口试下

连接不上可能22端口没开
[root@scyun-node-1 docker]# ssh -l root 172.17.0.3
ssh: connect to host 172.17.0.3 port 22: Connection refused

进入centos容器内部看下ssh服务有没有启动

[root@scyun-node-1 docker]# docker exec -it 6726ac4ac654 /bin/bash
[root@6726ac4ac654 ansible]# cd 
[root@6726ac4ac654 ~]# ls
anaconda-ks.cfg

安装一个net-tools工具
[root@6726ac4ac654 ~]# yum install net-tools -y

[root@6726ac4ac654 ~]# netstat -nltp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name 

ssh服务有没安装，安装ssh服务端
[root@6726ac4ac654 ~]# yum install openssh-server -y
[root@6726ac4ac654 ~]# ssh-keygen -A
ssh-keygen: generating new host keys: RSA1 RSA DSA ECDSA ED25519 
[root@6726ac4ac654 ~]# ls /etc/ssh/
moduli ssh_host_dsa_key ssh_host_ecdsa_key ssh_host_ed25519_key ssh_host_key ssh_host_rsa_key sshd_config
ssh_config ssh_host_dsa_key.pub ssh_host_ecdsa_key.pub ssh_host_ed25519_key.pub ssh_host_key.pub ssh_host_rsa_key.pub

##启动ssh服务
[root@6726ac4ac654 ~]# /usr/sbin/sshd
[root@6726ac4ac654 ~]# netstat -nltp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name 
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 116/sshd 
tcp6 0 0 :::22 :::* LISTEN 116/sshd 

[root@6726ac4ac654 ~]# ps -ef |grep ssh
root 116 0 0 14:31 ? 00:00:00 /usr/sbin/sshd
root 121 14 0 14:35 pts/1 00:00:00 grep --color=auto ssh


##修改root密码
[root@6726ac4ac654 ~]# echo 1 |passwd --stdin root
Changing password for user root.
passwd: all authentication tokens updated successfully.

远程连接即可成功

Connecting to 192.168.93.101:60022...
Connection established.
To escape to local shell, press 'Ctrl+Alt+]'.

WARNING! The remote SSH server rejected X11 forwarding request.
Last login: Sun May  9 14:51:08 2021 from gateway
[root@6726ac4ac654 ~]# ifconfig 
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 172.17.0.3  netmask 255.255.0.0  broadcast 172.17.255.255
        ether 02:42:ac:11:00:03  txqueuelen 0  (Ethernet)
        RX packets 217  bytes 23276 (22.7 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 143  bytes 20900 (20.4 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

使用现在基础制作一个centos7镜像，下次直接启动镜像后直接可以连接上。https://www.wscyun.com/2021/05/1437.html