[Spread-users] Spread startup

Theo Schlossnagle jesus at omniti.com
Tue Sep 26 12:07:39 EDT 2006

On Sep 26, 2006, at 11:51 AM, Ian Eiloart wrote:

> --On 26 September 2006 09:26:04 -0400 Theo Schlossnagle  
> <jesus at omniti.com> wrote:
>> On Sep 26, 2006, at 6:14 AM, Ian Eiloart wrote:
>>> I have spread configured with this segment only:
>>> Spread_Segment {
>>>        karpinski
>>>        chip  
>>>        lynndie
>>>        sivits
>>> }
>>> I'm using wackamole, configured to share about 20 IP addresses in
>>> virtual interfaces ("VIFs") between those four
>>> machines. Sometimes, when I use wackatrl -l, I get output like this:
>>> Owner:
>>>        *     lo0:
>>>         ->   lo0:
>> Make sure that "ping `hostname`" on all your boxes pings the expected
>> publicly accessible IP address. (85-88).  If not, set your  
>> hostname  and
>> make sure you have an /etc/hosts entry that points that hostname   
>> to the
>> right IP.  That, to me, looks like a wackamole issue more than  a  
>> Spread
>> issue.
> Well, hostname is always set correctly by the time I can get to log  
> in, it's set in /etc/hostconfig. The IP address is set by DHCP, so  
> it's not in /etc/hosts.
> Perhaps that's an alternative solution, but I think Spread would  
> ideally check that it has local access to one of the IP addresses  
> in the spread_segment definition before starting. Does it not do that?

Most server software is pretty particular about startup order /  
dependencies.  It sounds like you are trying to compensate for a lack  
of this on the Mac.  I was unaware that Mac launchd suffered form  
this (I thought it was a rather thorough startup system).  Spread and  
wackamole require certain things in the system to be functioning  
correctly before they start -- otherwise, the outcome will likely not  
be the desired outcome.

I would not be using DHCP to run these things.  The IP addresses are  
hardcoded into the spread.conf, but not into your hosts'  
configurations.  This is an inconsistency.

// Theo Schlossnagle
// CTO -- http://www.omniti.com/~jesus/
// OmniTI Computer Consulting, Inc. -- http://www.omniti.com/

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