改密（1）：

[root@vmhost2 /]# virsh list
Please enter your authentication name: admin 
Please enter your password: 
错误：连接到管理程序失败
错误：验证失败: 验证失败

[root@vmhost2 /]# saslpasswd2 -a libvirt admin
Password: 设置密码
Again (for verification):再次输入密码 

查密（2）：

用户(vdsm@ovirt)获取

[root@ovirt3 ~]# find / -name libvirtconnection.py 
/usr/lib/python2.7/site-packages/vdsm/common/libvirtconnection.py
[root@ovirt3 ~]# egrep vdsm@ovirt /usr/lib/python2.7/site-packages/vdsm/common/libvirtconnection.py
SASL_USERNAME = "vdsm@ovirt"

密码(shibboleth)获取

[root@ovirt3 ~]# find / -name libvirt_password          
/etc/pki/vdsm/keys/libvirt_password
[root@ovirt3 ~]# cat /etc/pki/vdsm/keys/libvirt_password
shibboleth  #密码

oVirt用户登录解锁

ovirt-engine用户密码多次失败后会锁定，需要登陆后台进行解锁：
ovirt-aaa-jdbc-tool user unlock admin admin为需要解锁的用户