在配置RAC节点之间相互信任机制的时候，rac2节点上grid用户忘记给 ~/.ssh授权，导致rac2节点无法通过验证，错误如下：
1 [grid@rac2 grid]$ ./runcluvfy.sh stage -pre crsinst -n rac1,rac2 -fixup -verbose 2 3 Performing pre-checks for cluster services setup 4 5 Checking node reachability... 6 7 Check: Node reachability from node "rac2" 8 Destination Node Reachable? 9 ------------------------------------ ------------------------ 10 rac2 yes 11 rac1 yes 12 Result: Node reachability check passed from node "rac2" 13 14 15 Checking user equivalence... 16 17 Check: User equivalence for user "grid" 18 Node Name Comment 19 ------------------------------------ ------------------------ 20 rac2 failed 21 rac1 failed 22 Result: PRVF-4007 : User equivalence check failed for user "grid" 23 24 ERROR: 25 User equivalence unavailable on all the specified nodes 26 Verification cannot proceed 27 28 29 Pre-check for cluster services setup was unsuccessful on all the nodes
上面的错误就是先创建了ssh验证，然后在授权导致，一定要先授权然后在创建ssh验证，代码如下：
1 [grid@rac2 .ssh]$ chmod 700 ~/.ssh/ 2 [grid@rac2 .ssh]$ /usr/bin/ssh-key -t rsa 3 ssh-keygen ssh-keyscan 4 [grid@rac2 .ssh]$ /usr/bin/ssh-keygen -t rsa 5 Generating public/private rsa key pair. 6 Enter file in which to save the key (/home/grid/.ssh/id_rsa): 7 /home/grid/.ssh/id_rsa already exists. 8 Overwrite (y/n)? yes 9 Enter passphrase (empty for no passphrase): 10 Enter same passphrase again: 11 Your identification has been saved in /home/grid/.ssh/id_rsa. 12 Your public key has been saved in /home/grid/.ssh/id_rsa.pub. 13 The key fingerprint is: 14 3d:50:b7:09:58:c6:84:8e:52:46:a6:ca:bc:6b:da:12 grid@rac2 15 The key's randomart image is: 16 +--[ RSA 2048]----+ 17 | .o ** . | 18 | oo oo.o o | 19 | .o o. o | 20 | o .. . .o | 21 | + . S o | 22 |E . . | 23 | .. | 24 |.... | 25 |.+o | 26 +-----------------+ 27 [grid@rac2 .ssh]$ cat id_rsa.pub >>authorized_keys 28 [grid@rac2 .ssh]$ ls 29 authorized_keys id_rsa id_rsa.pub known_hosts 30 [grid@rac2 .ssh]$ ll 31 total 16 32 -rw-r--r--. 1 grid oinstall 782 Aug 17 13:38 authorized_keys 33 -rw-------. 1 grid oinstall 1675 Aug 17 13:37 id_rsa 34 -rw-r--r--. 1 grid oinstall 391 Aug 17 13:37 id_rsa.pub 35 -rw-r--r--. 1 grid oinstall 1590 Aug 17 12:49 known_hosts 36 [grid@rac2 .ssh]$ scp authorized_keys rac1:/home/grid/.ssh/ 37 grid@rac1's password: 38 authorized_keys 100% 782 0.8KB/s 00:00 39 [grid@rac2 .ssh]$ ssh rac1 date 40 Fri Aug 17 13:39:09 CST 2018 41 [grid@rac2 .ssh]$ ssh rac1priv date 42 Fri Aug 17 13:39:18 CST 2018 43 [grid@rac2 .ssh]$ ssh rac2 date 44 Fri Aug 17 13:39:28 CST 2018 45 [grid@rac2 .ssh]$ ssh rac2priv date 46 Fri Aug 17 13:39:33 CST 2018