[GE users] in what case(s) is SGE host_aliases consulted?

Charu Chaubal Charu.Chaubal at Sun.COM
Fri May 20 00:14:04 BST 2005


I noticed now you asked this about exec hosts.... of course in this case
the host_aliases file will already be existing from the master install,
so no need to create it.  I believe the install_execd script should
honor it, but again, give it a try.

regards,	
	Charu


Charu Chaubal wrote:
> Hi Chris,
> 
> I'm not exactly sure, but I believe if you create the file
> $SGE_ROOT/default/common/host_aliases with the proper entries *before*
> running the install script, it will use whatever settings exist there.
> I don't know if this gets overwritten later, or if it is preserved.
> 
> Let us know if that works.
> 
> regards,
> 	Charu
> 
> 
> Chris Dagdigian wrote:
> 
>>I have an interesting case with a group owning a cluster where the  
>>SGE qmaster node public hostname actually resolves back to an IP  
>>address that belongs to a firewall appliance. The firewall then does  
>>it's rule based thing and forwards packets on to the qmaster which  
>>actually has a private unroutable 192.168.1/24 DMZ-zone IP address.
>>
>>Setting aside the obvious issue of having a host with a FDQN that  
>>does not resolve back to any actual active network interface (!) this  
>>got me thinking a bit about the host_aliases file in SGE ...
>>
>>I know I can use host_aliases file to point client systems at the  
>>"real" DMZ IP address. During startup sge_execd will read and honor  
>>the alias listing. I use this feature quite often.
>>
>>What I am curious about is if the SGE 6 "install_execd" script will  
>>also honor the host_aliases file when it does its "Checking Hostname  
>>Resolving" work.   Does anyone know off hand if it does or does not?  
>>My goal is to keep even the install-time SGE related traffic from  
>>having to traverse the firewall.
>>
>>Regards,
>>Chris
>>
>>
>>
>>
>>
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> 
> 

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