Server Best Practices
Best practices for setting up and managing new servers
This page provides some general advice and suggestions on planning the deployment of new servers for research groups.
If you’ve already decided you need a new server, please read Choosing and registering a hostname and Configuring email. Otherwise, we suggest you at least skim the whole thing.
Do you need your own server?
In many cases, CSAIL-wide resources provided and wholly administered by
TIG may mean that you don’t actually need your own server. You can run
web applications (such as wikis, registration forms, and the like) on
CSAIL’s shared web servers — even using your own domain name like
<http://www.myproject.org/> if need be. TIG
provides CSAIL-wide database servers, a mailing-list server, a
mailing-list server, and many other resources. Many of these services
are self-serve, and if you need something more complex or something that
requires TIG’s intervention you can send mail to firstname.lastname@example.org
and we’ll be happy to help.
Cases where your group might still want your own server might include situations where you want more performance or security isolation from other groups at CSAIL (e.g., if your service is going to be extremely heavily loaded sometimes, your colleagues at CSAIL might appreciate having it on a different machine from theirs, or if your application is timing-critical, you might want it on a machine that has no other load on it), or situations where you want complete control of the machine from the hardware up (e.g., if you want to be able to load arbitrary kernels or OSes on it).
Heavy computing, where you want a large amount of CPU and RAM available to your own group without the potential of other groups using it, might be a case where it makes sense to have your own physical server(s). Do be aware, though, that CSAIL has [a shared Condor cluster], which may meet your needs. (Even if you do end up buying your own servers, if the Condor model works for you you might want to join them to the CSAIL-wide condor cluster, presumably with your group’s jobs getting priority on them, so that you can take advantage of spare capacity elsewhere when you need it and your colleagues can take advantage of your unused capacity when your machines would otherwise be idle. Contact us at email@example.com if you’d like to explore that possibility.
Virtual or physical?
If you decide you need your own server, we provide a couple different ways to deploy virtual servers, so you may still not need to buy your own hardware.
Our OpenStack-based compute cluster provides a “private cloud” along the lines of Amazon EC2, but using hardware here at CSAIL (generously donated by Quanta Computer). It provides a self-service way to configure, bring up, and tear down VMs. At present it’s not well suited for long-lived public-facing servers, since the contents of your virtual local disks are not preserved when you shut down the VM, but we expect that to change in the very near future (as of August 2013). We have the best support there for Ubuntu VMs, but other distros should work too, and I believe at least one brave soul has gotten Windows to work.
In addition, when necessary, we can deploy Debian research VMs on a small cluster of Xen servers. This involves much more manual intervention on our part, is limited to Debian, and is resource-constrained. We hope to move these VMs to our OpenStack infrastructure (which doesn’t have those limitations) as soon as our support for persistent local-disk images there is solid, but in the meantime if you need a public-facing database or web server that needs to be isolated (administratively) from other groups’ servers, this is a last-resort way we can give it to you as a VM.
Please see Computer Hardware
If you decide you want to buy a physical server and you want to deploy it in one of the shared CSAIL machine rooms, you must talk to TIG first! Before your machine(s) can be deployed, we have to identify suitable rack space and make sure that sufficient power, cooling, and network drops are available for it. All new servers installed in CSAIL machine rooms must be rack-mountable. If you have a tower server, you can use it, but it will need to be in somebody’s office or in your group’s shared space. That means it won’t have the benefit of the machine-room UPSes, it’s more likely to have the power cord kicked out accidentally, and in many cases it means that somebody’s stuck listening to a very noisy machine. Generally it’s preferable to buy rackmount hardware.
Massachusetts Green High-Performance Computing Center (MGHPCC), aka, Holyoke
put your server here! MGHPCC
Choosing and registering a hostname
Different groups have their own conventions for hostnames, so you’ll
want to talk to your colleagues about this. It makes our lives (and
ultimately yours) if similarly configured machines have similar
(pattern-matchable) hostnames. For instance, if you have a cluster of
nine machines that do raytracing, it’s easier for us (although less
interesting) to call them
pluto1. That way
we can set up our configuration-management infrastructure to recognize
the pattern and when you add
raytrace12 it will just work without you
having to coordinate with us.
It’s also very helpful for us if the hostnames give us a hint who to
contact if we have problems with the machine years down the road
(perhaps after you’ve left CSAIL). So if you work with the XYZ group, it
would be even better to call these machines
The person who initially adds a machine in WebDNS is recorded in our database, so if we need to know who to contact about a machine and we can’t figure out who it belongs to, that’s where we’ll look. For that reason, it’s very helpful if the person who initially registers a machine is the primary user, and/or if her or his supervisor is the PI of the research group who will be using the machine.
Unless your machine is purely managed by TIG (e.g., you don’t install any software yourself, but ask us to install and configure it for you), it is important that you arrange for root email go to somebody in your group who has management responsibility for the machine. (If the machine is a CSAIL Debian or CSAIL Ubuntu machine, i.e., runs our customized CSAIL installation of the OS, root mail should also still go to TIG as well.)
On a machine running CSAIL Ubuntu (our current preferred distribution),
you can do this by editing the file
(creating it if it doesn’t exist) and adding a line that says
The change will take effect within about half an hour.
On a machine running the legacy CSAIL Debian distribution, you can do
this by editing the
root: line in
/etc/aliases directly. For
instance, you would change it from
to something like
root: firstname.lastname@example.org, email@example.com
(This applies to workstations as well, although the alias to send root mail to TIG is different in that case.)
TIG strives to ensure that our computer systems, network, software and data are secure and functioning in a way that allows the CSAIL community to be confident in the platforms and services we provide. TIG urges users to employ best practices to ensure the security of systems of theirs that live on TIG-provided platforms, such as an OpenStack instance. Confidential data should be stored in a controlled, secure environment, protected from unauthorized access. TIG is not responsible for any damage that may arise from improperly deployed or maintained systems.
For more details, please see Data Security
- Information about CSAIL Ubuntu, including
installation and administration instructions
[a shared Condor cluster]:
- Take that, International Astronomical Union! [return]