RAC grid安装检查报错Result: PRVF-4007 : User equivalence check failed for user "oracle"

安装RAC的时候报错：

[oracle@node1 grid]$ ./runcluvfy.sh stage -pre crsinst -n node1,node2 -verbose


Performing pre-checks for cluster services setup 


Checking node reachability...


Check: Node reachability from node "node1"
  Destination Node                      Reachable?              
  ------------------------------------  ------------------------
  node1                                  yes                     
  node2                                  yes                     
Result: Node reachability check passed from node "node1"




Checking user equivalence...


Check: User equivalence for user "oracle"
  Node Name                             Status                  
  ------------------------------------  ------------------------
  node1                                  failed                  
  node2                                  failed                  
Result: PRVF-4007 : User equivalence check failed for user "oracle"


ERROR: 
User equivalence unavailable on all the specified nodes
Verification cannot proceed

根据网上查到的方法：

Verification of node connectivity was unsuccessful on all the nodes.

查询metalink发现是Oracle cluvfy工具的问题。Oracle在文章：Note:369598.1：User Equivalence Check Failed for User Oracle Using Ssh/scp中进行了详细的描述。

简单的说，Oracle在寻找ssh命令时，去/usr/local/bin目录下寻找，而ssh命令在/usr/bin目录下。

相应的解决方法也很简单，在/usr/local/bin目录下建立一个指向/usr/bin/ssh的链接就可以了。

root@ahrac1 # mkdir -p /usr/local/bin
root@ahrac1 # ln -s -f /usr/bin/ssh /usr/local/bin/ssh
root@ahrac1 # ln -s -f /usr/bin/scp /usr/local/bin/scp

不过再次尝试，仍然报错：

$ ./runcluvfy.sh comp nodecon -n ahrac1,ahrac2 -verbose

Verifying node connectivity

ERROR: 
User equivalence unavailable on all the nodes.
Verification cannot proceed.

Verification of node connectivity was unsuccessful on all the nodes.

后来才发现，原来Oracle用户的ssh验证步骤必须先执行：

$ exec /usr/bin/ssh-agent $SHELL
$ /usr/bin/ssh-add
Enter passphrase for /export/home/oracle/.ssh/id_rsa: 
Identity added: /export/home/oracle/.ssh/id_rsa (/export/home/oracle/.ssh/id_rsa)
Enter passphrase for /export/home/oracle/.ssh/id_dsa: 
Identity added: /export/home/oracle/.ssh/id_dsa (/export/home/oracle/.ssh/id_dsa)
$ ./runcluvfy.sh comp nodecon -n ahrac1,ahrac2 -verbose

解决不了.....

后来发现用ssh node2 date的时候需要输入密码,这个好像不行,于是手工建立SSH用户等效性配置:

 node1:


$ mkdir ~/.ssh
$ chmod 700 ~/.ssh
$ ssh-keygen -t rsa
$ ssh-keygen -t dsa




node2:


$ mkdir ~/.ssh
$ chmod 700 ~/.ssh
$ ssh-keygen -t rsa
$ ssh-keygen -t dsa




node1:
$ cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
$ cat ~/.ssh/id_dsa.pub >> ~/.ssh/authorized_keys 
$ ssh node2 cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
$ ssh node2 cat ~/.ssh/id_dsa.pub >> ~/.ssh/authorized_keys
$ scp ~/.ssh/authorized_keys node2:~/.ssh/authorized_keys

问题解决