Re: RAC, user equivalence

On May 3, 4:11 pm, Mladen Gogala <mgogala.SPAM..._at_not-at-verizon.net> wrote:
> Does anybody know what is @#$%! "user equivalence"? I have 2 nodes,
> I have all the elements and here is what I get:
>
> [oracle_at_oracle20 cluvfy]$ ./runcluvfy.sh stage -pre crsinst -n
> oracle20,oracle21 -verbose
>
> Performing pre-checks for cluster services setup
>
> Checking node reachability...
>
> Check: Node reachability from node "oracle20"
> Destination Node Reachable?
> ------------------------------------ ------------------------
> oracle20 yes
> oracle21 yes
> Result: Node reachability check passed from node "oracle20".
>
> Checking user equivalence...
>
> Check: User equivalence for user "oracle"
> Node Name Comment
> ------------------------------------ ------------------------
> oracle21 failed
> oracle20 failed
> Result: User equivalence check failed for user "oracle".
>
> ERROR:
> User equivalence unavailable on all the nodes.
> Verification cannot proceed.
>
> Pre-check for cluster services setup was unsuccessful on all the nodes.
> [oracle_at_oracle20 cluvfy]$
>
> I can reach both nodes without a password:
> [oracle_at_oracle20 cluvfy]$ ssh oracle21
> Last login: Thu May 3 15:49:14 2007 from oracle20-priv
> [oracle_at_oracle21 ~]$ ssh oracle20
> Last login: Thu May 3 15:49:31 2007 from oracle21-priv
> [oracle_at_oracle20 ~]$ ssh oracle21-priv
> Last login: Thu May 3 16:09:38 2007 from oracle20
> [oracle_at_oracle21 ~]$ ssh oracle20-priv
> Last login: Thu May 3 16:09:42 2007 from oracle21
> [oracle_at_oracle20 ~]$
>
> WTF is "user equivalence"? The installation procedure for RAC is
> really, really foobar.
> --http://www.mladen-gogala.com

Hi Mladen,

It just means you can run commands from either host on the other host. It used to be done with rhosts files, with more users moving to SSH. HTH, Steve Received on Thu May 03 2007 - 15:13:57 CDT