Many thanks Jacques - off to do some testing! 

Cheers
Sam

On 4 Aug 2012, at 00:11, Jacques Le Roux <[email protected]> wrote:

> Hi Sam,
> 
> I'm not sure to get it but you could use the IP address of each machine, look 
> into startofbiz.sh:
> IPADDR=`/sbin/ifconfig eth0 | grep 'inet addr:' | cut -d: -f2 | awk '{ print 
> $1}'`
> 
> From that you could parse (ie remove the dot) and create an unique Id for 
> each machine
> 
> Also Googled for "sh properties file access", found this as 2nd entry in the 
> SERP 
> http://shrubbery.mynetgear.net/c/display/W/Reading+Java-style+Properties+Files+with+Shell
> 
> HTH
> 
> Jacques
> 
> 
> Sam Hamilton wrote:
>> Hey everyone!
>> 
>> This is kinda a weird question but does anyone know a way to auto insert the 
>> machines hostname in the unique.instanceId variable
>> in general.properties?
>> 
>> I am asking as I am migrating over to AWS and trying to automate the build 
>> for a whole clustered stack so that if one of the
>> instances dies the system knows and rebuilds.
>> 
>> Something like unique.instanceId=$HOSTNAME but I don't know where to find 
>> the supported list of variables that a properties file
>> can have?
>> 
>> 
>> Cheers
>> Sam 

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