Esxi设置从NTP获取时间，并将时间同步到虚拟机，修复虚拟机时间重启后时间不对的问题

首先确保exsi的时间是正确的

1. 登录web管理界面
   Host->Manage->System->Time & date->Edit Settings

   
   
   esxi-ntp.png

2. 设置

• check 'Use Network Time Protocol(enable NTP client)'
• NTP service startup policy->Start and stop with host
• NTP servers:
  ntp1.aliyun.com, ntp2.aliyun.com, ntp3.aliyun.com, ntp4.aliyun.com, ntp5.aliyun.com,ntp6.aliyun.com, ntp7.aliyun.com
  
  esxi-ntp-1.png

设置同步Exsi的时间到guest

右击虚拟机->Edit Setting->VM Options->VMware Tools->勾选Synchronize guest time with host

esxi-ntp-2.png

esxi-ntp-3.png

Esxi允许采用rsa免密码登录

1. vi /etc/ssh/keys-root/authorized_keys
   将id_rsa.pub内容复制到上述文件
2. /etc/init.d/SSH restart
3. 如果不能登录，请如下操作

• To allow root access, change PermitRootLogin no to PermitRootLogin yes in the /etc/ssh/sshd_config file.
• To disable password login, ensure that the ChallengeResponseAuthentication and PasswordAuthentication are set to no.