docker ssh: connect to host localhost port 22: Cannot assign requested address

原因

sshd服务还没有开启

docker 里面的centos，service和systemctl都不好用。

1. /usr/sbin/sshd-keygen -A
2. /usr/sbin/sshd

不在报错

3. 设置免密登录
   ssh-keygen -t rsa -P '' -f ~/.ssh/id_rsa
   cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
   chmod 0600 ~/.ssh/authorized_keys