multihomed NFS automounts.

[Jeremy A. Rosengren]

Huw Lynes wrote:
> On Fri, 20 Aug 2004 01:18:20 -0500
> "Jeremy A. Rosengren" <jeremy at rosengren.org> wrote:
> 
> 
>>Sorry for the detail, I want to make sure my question is understood :)
>>
>>At the office, we use NIS automounts extensively.  Quite often, we'll 
>>have the same data mirrored in multiple offices, located in different 
>>physical buildings.  The automounter in Solaris supports multihomed 
>>automount maps, so that a client machine will try to mount the closest 
>>server (ie, on its subnet) first before trying others.  For example:
>>
>>#ypcat -k auto_project
>>project1	fileserver1,fileserver2:/vol/vol0/data/project1
>>
> 
> It looks to me like this functionality is already contained in recent releases
> of autofs. From /usr/share/doc/autofs-4.1.3/README.replicated-server
> 
> Supported forms for mount paths are:
> 
> Normal single-host (these are unchanged)
> <path> host:/path/path
> 
> Multiple replicated hosts, same path:
> <path> host1,host2,hostn:/path/path
> 
> This will do an initial RPC call with a .1 second timeout to all hosts to 
> find best match.  If this fails, it will try a 10 second timeout, if this 
> fails it takes the first host.
> 
> Multiple hosts, some with same path, some with another
> <path> host1,host2:/blah host3:/some/other/path
> 
> Works as expected
> 
> Multiple replicated hosts, different (potentially) paths:
> <path> host1:/path/pathA host2:/path/pathB
> 
> Same as above with RPC calls..
> 
> 
Interesting -- I didn't even look in /usr/share/doc/autofs-4.1.3 since 
this doesn't work in FC2 for a few particular automounts that I have.  I 
assumed there was still no support because of that.

Thanks,

-- jeremy