Re: wackamole query

The code that handles this is in ife.c.

--Ryan

Ashton Trey Belew wrote:

>>The other issue I'd mention is that there have been problems with some
>>platforms in the past where you needed to have an address already on
>>eth0 in order for Wackamole to correctly function, so 0.0.0.0 might not
>>be enough.
> 
> 
>         This is precisely my problem.  Does anyone perchance know where I
> should start poking around to try to change wackamole to work properly
> with a null address?
> 
>         Thank you! :)
>         -Trey
> 
> 
>>Let me know if this is any help,
>>Ryan
>>
>>Ashton Trey Belew wrote:
>>
>>
>>>	Hello,
>>>	I am hoping to use wackamole in a cluster of machine which have
>>>2 interfaces.  eth0 I hope to be the public service interface, while
>>>eth1 is connected to a private network.
>>>
>>>	I have been doing some experimenting with the spread.conf and
>>>wackamole.conf to get the behavior I desire with very limited success,
>>>so I thought I would come here and see what I could learn.
>>>
>>>	My hope:
>>>	Boot box, eth0 gets upped with no address (ifconfig eth0
>>>0.0.0.0)  eth1 receives a private address (10.0.0.211)  Start spread,
>>>start wackamole -- machine receives 1 or more public addresses on eth0.
>>>I am hoping to not have to have an address in the public network for
>>>every machine, for we don't really have that many addresses left.
>>>
>>>	Here are my two current config attempts and what they do:
>>>Attempt1:
>>>/usr/local/etc/spread.conf:
>>>Spread_Segment  10.0.0.255 {
>>> p1 10.0.0.211
>>> p2 10.0.0.212
>>> p3 10.0.0.213
>>> p4 10.0.0.214
>>> p5 10.0.0.215
>>> p6 10.0.0.216
>>>}
>>>wackamole.conf:
>>>VirtualInterfaces {
>>> { eth0:132.198.101.211/24 }
>>> { eth0:132.198.101.212/24 }
>>> { eth0:132.198.101.213/24 }
>>> { eth0:132.198.101.214/24 }
>>> { eth0:132.198.101.215/24 }
>>> { eth0:132.198.101.216/24 }
>>>}
>>>Notify {
>>> eth1:10.0.0.0/24 throttle 128
>>> arp-cache
>>>}
>>>	Behavior:  Semi works if I am very careful to already have eth0
>>>up with no address.  1 machine of the 6 invariably doesn't receive an
>>>address properly for reasons I do not understand.
>>>
>>>
>>>Attempt 2:
>>>spread.conf:
>>>Spread_Segment 10.0.0.255 {
>>> penguin1 132.198.101.211 {
>>>  D 10.0.0.211
>>>  C 132.198.101.211
>>> }
>>> penguin2 132.198.101.212 {
>>>  D 10.0.0.212
>>>  C 132.198.101.212
>>> }
>>> penguin3 132.198.101.213 {
>>>  D 10.0.0.213
>>>  C 132.198.101.213
>>> }
>>> penguin4 132.198.101.214 {
>>>  D 10.0.0.214
>>>  C 132.198.101.214
>>> }
>>> penguin5 132.198.101.215 {
>>>  D 10.0.0.215
>>>  C 132.198.101.215
>>> }
>>> penguin6 132.198.101.216 {
>>>  D 10.0.0.216
>>>  C 132.198.101.216
>>> }
>>>}
>>>wackamole.conf:
>>>VirtualInterfaces {
>>> { eth0:132.198.101.211/24 }
>>> { eth0:132.198.101.212/24 }
>>> { eth0:132.198.101.213/24 }
>>> { eth0:132.198.101.214/24 }
>>> { eth0:132.198.101.215/24 }
>>> { eth0:132.198.101.216/24 }
>>>}
>>>Notify {
>>> eth1:10.0.0.0/24 throttle 128
>>> arp-cache
>>>}
>>>
>>>	Behavior:  Does not seem to work at all.  I am not sure why.  I
>>>haven't been receiving notifications of new nodes joining the group, and
>>>when I start wackamole the eth0 interface (which I suspect unwisely)
>>>brought up with its default address gets lost.
>>>
>>>	Suggestions?  Would it be easy/possible to hack wackamole to
>>>check to see if the default address is already up and not attempt to add
>>>vip?
>>>
>>>	Thank you very much for your time,
>>>	-Trey
>>>
>>>--
>>>Ashton Trey Belew
>>>http://www.uvm.edu/~atb
>>>
>>>You will gain money by a speculation or lottery.
>>
>>--
>>Ryan W. Caudy
>>Center for Networking and Distributed Systems
>>Department of Computer Science
>>Johns Hopkins University
>>
>>
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>>wackamole-users mailing list
>>[email protected]
>>http://lists.backhand.org/mailman/listinfo/wackamole-users
>>
> 
> 
> 
> 
> --
> Ashton Trey Belew
> http://www.uvm.edu/~atb
> 
> Repeat after me: the goodness of an operating system is not in how pretty it
> is, but in how well it supports the user.
> 
> Make it your mantra.
>     - Linus Torvalds
> 
> 
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> wackamole-users mailing list
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> http://lists.backhand.org/mailman/listinfo/wackamole-users
> 

-- 
Ryan W. Caudy
Center for Networking and Distributed Systems
Department of Computer Science
Johns Hopkins University