[Halld-offline] Fwd: New HALLDWEB1 deployment today -- will be taking everything offline shortly to get started

[David Lawrence]

FYI: As mentioned at the collaboration meeting, some services may be down for a while today ….


Begin forwarded message:

> From: Paul Letta <letta at jlab.org>
> Subject: Re: New HALLDWEB1 deployment today -- will be taking everything offline shortly to get started
> Date: February 23, 2015 at 7:36:21 AM EST
> To: Marty Wise <wise at jlab.org>
> Cc: Hovanes Egiyan <hovanes at jlab.org>, Mark Ito <marki at jlab.org>, David Lawrence <davidl at jlab.org>, Serguei Pozdniakov <sergpozd at jlab.org>, Sherman White <srwhite at jlab.org>, kelvin <kelvin at jlab.org>
> 
> Remember.. gluonweb is really gluon24... and it will be wiped and loaded (i.e. disk reformatted...) to RHEL7.
> 
> Gluon24 and Gluon25 ran Hall D's DNS servers.
> 
> I started DNS on gluon26 last week and changed the resolv.conf files on all the gluon nodes.
> 
> There are still a couple of gluon nodes hitting the dns server running on gluon24 though.
> gluon29 (a lot..)
> gluon28, and gluon40 (a little)
> 
> So these 3 machines will probably start to act up once I shutdown gluon24 for the rebuild.  They should just be rebooted.
> 
> Paul
> 
> 
> From: "Marty Wise" <wise at jlab.org>
> To: "Hovanes Egiyan" <hovanes at jlab.org>, "Mark Ito" <marki at jlab.org>, "David Lawrence" <davidl at jlab.org>, "Serguei Pozdniakov" <sergpozd at jlab.org>
> Cc: "Paul Letta" <letta at jlab.org>, "Sherman White" <srwhite at jlab.org>, "kelvin" <kelvin at jlab.org>
> Sent: Monday, February 23, 2015 6:52:04 AM
> Subject: New HALLDWEB1 deployment today -- will be taking everything offline shortly to get started
> 
> All,
>  
> Just a reminder that I will be putting the new Hall D web and DB servers into production today. This will require all of the involved systems to be taken offline until I am finished. I expect the process to take all day, but I will let you know when I’m done.. it’s possible that I may finish early. The following systems will be taken offline shortly (between 8:30 and 9:00) to begin the process –
>  
> HALLDWEB1
> HDOPS
> HALLDWEB1-2015
> HALLDDB (actually an alias for HALLDWEB1 currently)
> HALLDDB-2015
> HALLDDB1
> HALLDDB1-2015
>  
> In addition, Paul will be taking GLUONWEB offline and rebuilding it with RHEL7.
>  
> When things are back online, only the following systems will be available –
>  
> HALLDWEB (recall that “halldweb1” will be renamed to “halldweb”)
> HALLDDB (previously an alias for halldweb1, will now be a separate system)
> HALLDDB-EXT (replacing hallddb1, from off-site, it will be called “HALLDDB.jlab.org”)
> GLUONWEB (rebuilt at RHEL7, still running the Wiki replica, etc.)
>  
> The old versions of all the systems will be retained for a couple of weeks for reference in case I miss anything and need them for reference. After things are checked out, all the old VMs will be removed.
>  
> In the central filesystems, the contents of /group/halld/www will be under construction as well, and should not be accessed or modified. I will manipulate permissions and directory names to prevent modification. As the deployment is completed, the directory trees will pared down, leaving only the new production directories. Old contents will be preserved, but not directly accessible to avoid confusion. The new directories, etc. will all match up with the corresponding machine names, etc.
>  
> One small point of possible confusion is with the HALLDB vs. HALLDDB-EXT systems. The –EXT system is the externally visible read-only replication slave of HALLDDB. From outside, it will be called “HALLDDB.jlab.org”. So, connecting to hallddb from inside will connect to the writable master, whereas the same connection from outside will connect to the read-only slave. The slave replicates everything from the master, including all the grants, etc. so, there should be no changes made on the slave… permissions changes made on the master will propagate to it.
>  
> Marty Wise (wise at jlab.org)
> JLab IT/CNI
> 

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