首先准备好以下测试机：
- Windows AD一台：192.168.137.137
- CentOS7一台：192.168.137.130
CentOS7上操作如下：
[root@centos130 ~]# yum install sssd realmd oddjob oddjob-mkhomedir adcli samba-common
[root@centos130 ~]# cat /etc/resolv.conf
search example.com
nameserver 192.168.137.137
[root@centos130 ~]# realm join --user=administrator hadoop.local
Password for administrator:检查：
[root@centos130 ~]# realm list
hadoop.local
type: kerberos
realm-name: HADOOP.LOCAL
domain-name: hadoop.local
configured: kerberos-member
server-software: active-directory
client-software: sssd
required-package: oddjob
required-package: oddjob-mkhomedir
required-package: sssd
required-package: adcli
required-package: samba-common-tools
login-formats: %[email protected]
login-policy: allow-realm-logins[root@centos130 ~]# id [email protected]
uid=193601109([email protected]) gid=193600513(domain [email protected]) groups=193600513(domain [email protected])
去Windows AD查看一下，这台CentOS已经加入到Windows AD里了。