Re: [SSI-users] CDSL's and typical SSI Linux cluster config

[Brian J. W. <Bri...@hp...>]

Goetzman, Dan wrote:
 > To make things work I had to create the following
> as CDSL's to allow each node to have a separate area;
> 
>  - /var/run
>  - /var/log
>  - /var/lock
>  - /tmp

Is this needed for HA-LVS? I haven't played with it, so I don't know.

>  Anyone have a list of other items that might need to be made a CDSL?
>  I still have the /etc/sysconfig/network file mounted using the "mount
> --bind" option, but maybe I should consider making this a CDSL as well?

I think so. The --bind instructions dated back to time before we had CDSLs.

 > This is done by the "pidofproc" function in /etc/init.d/functions
> (looking at Red Hat 7.3 here). It returns ALL pids found (on all nodes). IF
> the start/stop script uses /var/run/<service>.pid then ONLY the pid for the
> process on the node where the script is run will be killed (more like I
> would have expected).

Returning all PIDs is more in line with the SSI philosophy. If the 
cluster is behaving like a single giant machine, then 
`/etc/init.d/xinetd stop` should kill all the xinetd daemons in the 
cluster. A new method to stop a service on a given node, however, would 
be useful. RC script handling is an aspect of OpenSSI that hasn't been 
fully designed. Input is more than welcome. :)

>  Did I miss any CDLS's I might need/want to create?

Dave added one for /var/lib/nfs/statd in OpenSSI 0.9.6 to support 
clusterized NFS client.

> Thanks to all for the help in getting my first SSI Linux cluster up and
> running.

No problem. I'm glad you like it.

Brian