[K12OSN] Beta 6?

Wed Aug 15 14:06:25 UTC 2007

Right now I have one of the two edubuntu servers acting as the dhcp 
server. It's also the place where I'm splitting up which clients go to 
which ltsp LDM_SERVER using lts.conf.
This provides some load balancing but no failover. I'm definitely open 
to using two both edubuntu servers as dhcp servers.

Luis

David Trask wrote:
> Are your Edubuntu servers going to be the DHCP servers for the network? 
> For this they'll need to be....if so....then I can send you my dhcp config
> to show you how to do it.  Basically how it works....
>
> 2 Edubuntu servers (both with one NIC) connected to the LAN
> One is the primary and the other the secondard
> Both server the exact same range, but an algorithm sets it up so first one
> answers and then the other
> In a perfect world...if you have a lab of 20 machines....10 will get their
> address from server A and 10 from server B   (I've tested this and it is
> the case, but then the users show up and there are more machines)
>
> If Server A goes down....Server B hands out ALL the IP addresses until
> Server A comes back online.  From an Edubuntu or LTSP standpoint....since
> the TC's get their "image" from the server they get their DHCP from in
> this case....the load gets split in half as TC#1 boots from Server
> A...TC#2 boots from Server B...and so on.  Works slick!
>
>
> Luis Montes <monteslu at cox.net> writes:
>   
>> Thanks for the help, everyone.
>>
>> Only thing I need now is the load balancing part to get back to where I 
>> was with k12ltsp. Any tips or pointers to documentation of how you did it?
>> In k12ltsp, I just load balanced by poining half the workstations at a 
>> different server using lts.conf, but that doesn't cover failover.
>>
>> I'm not really so much set on edubuntu as I am getting a working Muekow 
>> install before school starts up next week.
>>
>>
>> Luis
>>
>> David Trask wrote:
>>     
>>> Sound works fine in flash....go here
>>>
>>> https://help.ubuntu.com/community/EdubuntuFAQ
>>>
>>> near the bottom for the fix...piece of cake.  I have it working well. 
>>> also on the Edubuntu site either in the docs or the wiki you'll find the
>>> lts.conf variables.  I recently (last week) got two servers (Edubuntu)
>>> with dhcp/load balance and failover along with a Samba/LDAP server using
>>> smbldap-installer....up and running.  It was so easy it was
>>> anti-climactic.  I'm still a K12LTSP fan and have been since the
>>>       
>> beginning
>>     
>>> (I've used it at our school since September 2001...in
>>>       
>> earnest)...however,
>>     
>>> I really like where Ubuntu and Edubuntu are headed.  The MueKow way of
>>> doing things is the way of the future....there are still some bugs, but
>>> each new release just gets SO MUCH better.  I would love to see the
>>> Redhat/Fedora folks really get their act together and go nuts with
>>> K12LTSP, but it ain't happening yet...at least publicly.  There will be
>>> MAJOR new advances in Gutsy (the next release) that should speed things
>>>       
>> up
>>     
>>> tremendously.  Once booted the terminals are fine....no diffs between
>>> K12LTSP and Edubuntu.....it's the booting that takes a bit.  Be sure to
>>> use Gideon Romms patched LDM for your current Edubuntu installation.
>>>
>>> I think it's here
>>>
>>>
>>>       
>> http://codebrowse.launchpad.net/~gideon/ltsp/gadi-ldm-mods-ltsp/download/gadi%40ltsp.org-20070521205254-ek710bofdpdtlwlz/x_Matt_Zimmerman_%3Cmatt.zimmerman%40canonical.com%3E_Tue_Jun__7_19%3A59%3A49_2005_32192.0/ldm
>>     
>>> and do this:
>>>
>>>   
>>>       
>>>> Replace your current "/opt/ltsp/i386/usr/sbin/ldm" with the new file
>>>>     
>>>>         
>>> (you may want to
>>>   
>>>       
>>>> backup your current ldm just to be safe).  The in
>>>>     
>>>>         
>>> "/opt/ltsp/i386/etc/lts.conf" add the
>>>   
>>>       
>>>> following line:
>>>>
>>>> LDM_DIRECTX=True
>>>>     
>>>>         
>>> Hope this all helps!  :-)
>>>
>>> "Support list for open source software in schools." <k12osn at redhat.com>
>>> writes:
>>>   
>>>       
>>>> One day in and I've had some success and some extreme frustration.
>>>>
>>>> First the good stuff:
>>>>
>>>> Install went fine.
>>>> Thin clients immediately booted up.
>>>> The latest smbldap client script connected me right up.
>>>>
>>>> Now the problems:
>>>>
>>>> sudo... I guess it's better than switching to root like I've always
>>>>         
>> done
>>     
>>>> with redhat, but why does it only work on the server for GUI apps?
>>>> The lts.conf is not nearly as nice as the one on k12ltsp. In fact, it's
>>>> almost empty. I have no idea what the new variables are. The top of the
>>>> file says I can read a gzipped example conf, but it doesn't exist on
>>>>         
>> the
>>     
>>>> server or in any repo that I can tell.
>>>> Sound still doesn't work for me in flash on  a client and the only
>>>>         
>> adobe
>>     
>>>> flash thing i can see in the repo is the plugin itself.
>>>>
>>>> Luis
>>>>
>>>>
>>>> ---- Jim Kronebusch <jim at winonacotter.org> wrote: 
>>>>     
>>>>         
>>>>> On Thu, 9 Aug 2007 13:22:08 -0700, monteslu wrote
>>>>>       
>>>>>           
>>>>>> I have k12ltsp5EL & edubuntu discs sitting in front of me, and school
>>>>>>         
>>>>>>             
>>>> starts 
>>>>     
>>>>         
>>>>>> on Monday.
>>>>>>
>>>>>> As much as I love fedora, redhat hasn't done much to help integrate
>>>>>>         
>>>>>>             
>>>> Muekow. 
>>>>     
>>>>         
>>>>>> I'm gonna give edubuntu a shot.
>>>>>>
>>>>>> 1 smbldap server
>>>>>> 2 edubuntu servers
>>>>>> 70 thin clients.
>>>>>>
>>>>>> I'll report on my success or failure.
>>>>>>         
>>>>>>             
>>>>> You'll really like Edubuntu.  Download the modified LDM and enable
>>>>>       
>>>>>           
>>>> LDM_DIRECTX=true in
>>>>     
>>>>         
>>>>> lts.conf for faster screen speeds.  FYI the Thin Client Manager
>>>>>       
>>>>>           
>>>> (Edubuntu's TeacherTool)
>>>>     
>>>>         
>>>>> has some major issues at the moment, any VNC related features do not
>>>>>       
>>>>>           
>>>> work.  Other than
>>>>     
>>>>         
>>>>> that Edubuntu is great.  
>>>>>
>>>>> If it helps you can steal the needed pieces from this tutorial for
>>>>>       
>>>>>           
>>>> setting up LDAP
>>>>     
>>>>         
>>>>> authentication for your Edubuntu servers:
>>>>>
>>>>> http://www.1-cs.com/ubuntu_ldap_howto.txt
>>>>>
>>>>> Good luck.
>>>>>
>>>>> -- 
>>>>> This message has been scanned for viruses and
>>>>> dangerous content by the Cotter Technology 
>>>>> Department, and is believed to be clean.
>>>>>
>>>>> _______________________________________________
>>>>> K12OSN mailing list
>>>>> K12OSN at redhat.com
>>>>> https://www.redhat.com/mailman/listinfo/k12osn
>>>>> For more info see <http://www.k12os.org>
>>>>>       
>>>>>           
>>>> _______________________________________________
>>>> K12OSN mailing list
>>>> K12OSN at redhat.com
>>>> https://www.redhat.com/mailman/listinfo/k12osn
>>>> For more info see <http://www.k12os.org>
>>>>     
>>>>         
>>> <monteslu at cox.net>
>>>
>>> David N. Trask
>>> Technology Teacher/Director
>>> Vassalboro Community School
>>> dtrask at vcsvikings.org
>>> (207)923-3100
>>>
>>>
>>>
>>>   
>>>       
>
>
>
> David N. Trask
> Technology Teacher/Director
> Vassalboro Community School
> dtrask at vcsvikings.org
> (207)923-3100
>
>
>
>   