[hobbit] multiple hosts

[Rolf Schrittenlocher]

Hi,

we solved our multiple hosts problem with a workaround. Thanks to Adam, 
Alexander and David for hints.
We are using now the same approach as David, running several instances 
of hobbitlaunch on the client if necessary. Boiling down the 
modifications in runclient.sh to the central part is:
...
ext/create_startlist.ksh
...
 case "$CMD" in
  "start")
        for MACHINE in `cat $HOBBITCLIENTHOME/etc/startlist`
        do
         export $MACHINE
...
         $HOBBITCLIENTHOME/bin/hobbitlaunch 
--config=$HOBBITCLIENTHOME/etc/clientlaunch.${MACHINE}.cfg 
--log=$HOBBITCLIENTHOME/logs/clientlaunch.${MACHINE}.log 
--pidfile=$HOBBITCLIENTHOME/logs/clientlaunch.${MACHINE}.pid
... 
    done

startlist is created according to the aliases set on the host.

Thanks to all who contribute to this list and special thanks to Henrik 
for his efforts and this great tool.
Rolf

> Hi,
>
> as there was no answer to my first mail, I try again with other words:
>
> Our machines may have one or more aliases (virtual hosts) which all 
> have DNS-entries. Normally we refer to the machines not using the 
> hostname but by the alias, each of them combined to a bundle of 
> functions and tasks. So a machine "frodo.xxx.de" might host 
> "webserver.xxx.de", "dnsserver.xxx.de" and "tolkserver.xxx.de".  These 
> aliases and of course the tasks related to them are transferred to 
> another machine in case of hardware failure, maintenance, etc.
> In bb-hosts we have an entry for each machine (to get data from this 
> machine in case there is no alias set on it) and of course for all 
> relevant aliases. What we need now is that the general client data 
> (cpu, disk, ssh, ...) for each machine appears both with the hostname 
> and all aliases set on it.
> I added a script to runclient.sh which creates 
> ~/client/etc/clientlaunch.cfg dynamically according to the aliases set 
> on the machine before starting the client. This assures that the 
> correct data is polled on the client. I may modify $MACHINE or Í may 
> use the CLIENT:hostname tag in bb-hosts to make the client send 
> messages with a different name. But that would require several 
> instances of the client running, somethin I dislike. I hope there is a 
> way to send the client data once and to make the server look at some 
> configuration file to see where he should  present these data. Maybe 
> that possibility exists but I haven't found it yet. So I hope that 
> someone could indicate me where to search for the places which I have 
> to "hack" hoping that it is possible to do that with shell or perl as 
> my C-knowledge isn't so good. But even if C is necessary: Any hints 
> are appreciated.
>
> Thanks Rolf
>


-- 
Mit freundlichen Gruessen
Rolf Schrittenlocher

HRZ/BDV, Senckenberganlage 31, 60054 Frankfurt 
Tel: (49) 69 - 798 28908   Fax: (49) 69 798 2881
LBS: lbs-f at mlist.uni-frankfurt.de
Persoenlich: schritte at rz.uni-frankfurt.de