[auton-users] NOTICE: Lab Downtime Monday Dec 28.

[Michael J. Baysek]

Another question I am bound to get is:  What about CVS?  Isn't that on 
BigPapa?


Yes.  CVSROOTs will need to be changed.  We've already done this before 
when we moved CVS off of AFS back in 2005 or 2006.  In this case, moving 
of CVS is going to serve two purposes.  We are moving toward making sure 
that all CVS access is performed over SSH tunnel.  This is going to 
allow us to do smart things with CVS that we couldn't do before... That 
is, if we don't move to a better RCS like Subversion. 


There is a script which changes the CVSROOT of a CVS sandbox.  I will 
run this script on all network home directories.  Any h/ directories on 
laptops or hard drives elsewhere will need to have the script run 
manually.  Documentation on this issue is forthcoming.


There are many of these type of issues which are anticipated.  Most of 
them already are already planned for.  The idea is to make this as 
smooth a transition as possible. 


If anyone has any other questions, please do not be afraid to ask!


Mike








Michael J. Baysek wrote:
> Daniel, (and CC to list in case others had same questions)
>
>
> 1) Neill* machine availability
>
> Yes. All servers including neill* machines will be down during this 
> time.  The very core of the entire infrastructure is being 
> refactored.  Neill* machines do rely on some Auton infrastructure, 
> such as routing and networking so all machines are affected.
>
>
> 2) BigPapa going away
>
> The intention is to get completely away from using /mnt/BigPapa mount 
> point at all.
>
> I anticipated that scripts would be referencing it directly.  I 
> considered the use of symlinks, but that will only serve foster it's 
> survival, so at this point I am against it.
>
> Users could fix the scripts themselves, but instead, I plan to create 
> a script to crawl the file space for scripts referencing BigPapa and 
> fix them to point to the new locations.  Nobody should have to do 
> anything once this script is run unless they have BigPapa hardcoded 
> into C code.
>
>
> As far as the mount point change, all Auton resources will be mounted 
> from /auton from now on.  Documentation is upcoming on this change, 
> and will be released before the outage begins.
>
> Specific to you and your students, I wasn't planning on making any 
> changes to the neill-fs mountpoints at this time.
>
>
> Mike
>
>
>
>
> Daniel B. Neill wrote:
>> Hi Mike, could you please clarify the following:
>>
>> 1) Will the neill1-neill4 servers be going down as well?
>>
>> 2) After the downtime, how can we access data that was previously 
>> available in the /mnt/BigPapa directory?  (Can we keep a symbolic 
>> link around so that we don't have to change all our scripts?)
>>
>> Thanks!
>> Daniel
>>
>>
>> On Wed, 23 Dec 2009, Michael J. Baysek wrote:
>>
>>> Hi Lab.
>>>
>>>
>>> Please read this email in its entirety.  If you have any questions 
>>> or concerns, you need to let me know as soon as possible.
>>>
>>>
>>> All Auton Lab systems will be offline on Monday Dec 28 beginning at 
>>> 8:00 AM. This includes web servers, file servers, TCube Web 
>>> Interface instances, CVS, Subversion, VPN, and Linux desktops, and 
>>> pretty much everything else I haven't mentioned.  I expect that by 
>>> 5:00 PM, most services will again be available.
>>> When the system comes back up, we will have a new fileserver.  The 
>>> mount points for home and data directories will be changing.  
>>> BigPapa will be going away.  If you currently access "/mnt/BigPapa" 
>>> from a Linux box named gs*.sp.cs.cmu.edu, you will need to email me 
>>> and request the new mount points be setup correctly on your 
>>> machine.  If you are using a machine in the .auton.cs.cmu.edu or 
>>> .autonlab.org domains, I will make all necessary changes for you.
>>>
>>>
>>> Additionally, the internal IP addressing scheme will be changing.  
>>> For years, we have used 192.168.1.x as our internal IP range.  This 
>>> has limited our ability to work offsite over VPN in a number of ways 
>>> since most home routers use this address range.  This longstanding 
>>> issue will also be resolved during the downtime.
>>>
>>>
>>> OUTAGE:  Monday December 28
>>> WHEN:    8:00 AM to 5:00 PM (for critical services)
>>>
>>>
>>> Mike
>>>
>>>
>>> P.S.  I recommend if you need to keep working during the outage, to 
>>> copy whatever you are working on locally and work on it that way.  
>>> Keep in mind, you won't be able to log into any BigPapa connected 
>>> desktops at all, so don't copy it there!
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>
>