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Server Naming Conventions?
The reader continues:
"Here's a few ideas we've been tossing around, using Joe's Deli as an example:
- [four letter "name"][two letter service type][2 numbers]
eg) jdelwb03.domain.com
+ easy to determine the function and name
- hard to remember and pronounce, once you run out of four
character servers, determining the name and function will be
difficult. Joe's Deli and John's Delivery will have conflicting
names
- [random combination of numbers and letters]
eg) ak1jop3d.domain.com
+ none really
- confusing.. really confusing. Can you imagine saying to someone
"log on to alpha kappa one john omikron peter three delta?"
- [theme based name]
name servers based on a theme, eg Gundam
eg) zaku.domain.com, gelgoog.domain.com
+ easily identifiable - all Gundam names belong to Joe's Deli,
easy to pronounce and remember
- hard for a new tech or management (why would they need to know?)
to associate to a server
"I'd like to know what others in the tech community use for server naming policies when planning large scale data centres. Also, with data centres located nationally, does the naming convention pose any problems? Thanks."
I've always like the idea of naming your systems after your exec staff. Makes rebuilding them kinda fun - and if they're windos boxen - you know that at some point you'll get to reformat your CEO.
\Drew National Data Director, John Edwards for President
Must be using windows calculator to get that remainder...
"Just tell him ya did it! That's what he wants to hear anyway..."
This lets you distinguish between the server number in a rotation (the second element) and the specific service it is supporting (the first element).
I like to make my customers think... That's why I have echelon, bigbrother, etc. It's lot's of fun. I have learned to stay away from religious names though. I once had a baptist minister who wondered why a WHOIS on his domain showed his nameserver as Lucifer.
RFC 1178, Choosing a Name for Your Computer
Best Slashdot Co
use 128 bit UUIDs... no collision!
AD87D0A9S8D90A9D80AD90ASD8A0D80F0A80D8F0AASD3
if that isn't easy to remember I don't know what is!
more fun is when segments crash..."Britney an J-Lo are going down on us again."
Phrasing is everything.
My company is an example of extremely stupid behavior. We have desktop machines named jsmithw2knyc. Anytime the machine is reassigned to another person, moved from office to office, or changes operating systems, the hostname and DNS must be updated. It's silly.
At the company I work at, we have ~5000 servers worldwide, and they all follow the same naming convention:
Thus, a production server in Minneapolis, Minnesota would be usmnminpsnnn , or a development server in Vancouver, BC, would be cabcvandsnnn .
They that would sacrifice their
At $job[-2] we had about 200 hosts, give or take. Effectively, we did the name + number bit, becuase in our case, the servers were either standalone functionality (e.g. primedns.foo.com, secdns.foo.com, extwww.foo.com), or part of a large herd of machines doing the same thing: pbs001 .. pbs111 .. pbsXYZ (number cruncher machines running the pbs job batch control system). My advice to you is locate the "unique" machines, and give them names that strongly reflect their function on the network. The "herd members" you should give numeric names to (e.g. aix9999, fbsd3333, lnux2222, etc.) that also reflect the operating system being used (standardize the abbreviated os names, of course, nothing like wondering if 'dux' is a machine that quacks or a data general UX host). Keep an electronic (and paper!) record of what client is on which herd machine. I know the number thing seems a little impersonal, but how many anime series are there that can scale to several thousand host names? Even if you like war and peace, you'd run out after several hundred...
News for Geeks in Austin, TX
Do NOT use cutesy names. (Homer, Marge, etc etc etc). That works fine when you've got a lab of a dozen machines. When you've got thousands it's silly and unmangeable. I know I don't expect I'll be able to remember where one our of 5000 hosts is just because the name is "mickeymouse". Imagine just how functional that is for somebody who's new to your NOC?
:) But with that many machines, the biggest problem you have is FINDING the machine when something goes wrong. My company here has a policy that we name machines after beaches --- "pismo" "waikiki" etc etc. Thats all fine and dandy..... until the someone starts screaming "WHO IS RUNNING HOST *LONGBEACH*??? YOU'RE SPEWING OUT CRAZY MULTICAST AND TRASHING THE NETWORK." Our host count is only in the low hundreds, but actually FINDING the offending machine is a big fat waste of time.
Personally I'd encode them using one or two characters to denote the platform ( i = intel, s = sun, h = hp, blah blah). Then use the additional characters to denote room, rack, etc etc. If you're allowed to use sub domains that makes your life much easier.
Maybe I'm over pragmatic
If you absolutely have/want to use 'friendly' names. Give your machines multiple names..... the pretty one, and the ugly sensible one so you can easily map between the two when you have to.
I hate to use it as an example --- but look at Hotmail when you log in. They are using subdomains and strict naming conventions for there servers. It's the only sensible thing to do..... unless you're trying to guarantee youself job security (and if thats the case and I was your boss and I found out i'd fire your ass for being a moron).
You should assign LOGICAL names to services, and then map them into actual hosts via CNAME records.
For example, we have our servers named after the characters from Cheers - norm, diane, cliff, lillith, etc.
We also have functional names - smtp, pop3, dns, etc.
Now, in the DNS records, we have:
smtp CNAME cliff
pop3 CNAME cliff
dns CNAME norm
As a result, the clients are configured to send mail to smtp, get mail from pop3, but that is mapped into cliff. If we move outbound mail to norm, we just change the cname.
www.eFax.com are spammers
The LIRR homepage is http://www.mta.nyc.ny.us/lirr/. The LIRR is run by the MTA, which is located in NYC, which is a city in NY, which is located in the US. Perfect scheme, and a suprisingly decent application of DNS. Especially for government.
So why suffer with jdeli342.domain.com? Why not a.jdeli.domain.com, b.jdeli.domain.com, etc? In addition to allowing for easier delegation of services, you can set search orders in /etc/resolv.conf so you can simply type ``ssh b'' to hop from host a to host b. That's just golden.
Some other examples..
Mail Exchangers
Nameservers
Web servers
And so on. If you get to z, make the next one aa, and then ab, etc.
Also, functional names should not replace cute names. DNS allows you to assign more than one name to a machine. If a machine is repurposed for another ask, it should still be known by its unique cute name no matter where it goes. At the same time, a single host can have more than one functional name.
No reason barney.domain.com can't also be bc.web.domain.com and e.porn.domain.com. :)
A source of cute names? Oh, uhm, right now I use Roman empererors. There were tons of them.
I wonder what it means that my first thought was "the servers named Britney and J-Lo have stopped functioning" and it took almost a full 10 seconds before I realized the other meaning...
Damn, I need to get out more...
You are in a maze of twisty little relative jumps, all alike.
A good friend of mine was told to pick an element for his machine name at one job, but of course all of the good elements were taken by that time. (Who the hell wants to be Boron, after all...)
What did he choose?
Immodium.
That still cracks me up - (thanks, Dave!)
Cheers,
Jim in Tokyo
-- My Weblog.
My wife was expanding a lab with a preexisting "seven dwarves" naming scheme. So she invented some extra dwarves.
The two I remember were "sleazy" and "scuzzy".
Bantam Dominique roosters crow a four-note song. Once you've heard it as "Happy BIRTHday" you can't NOT hear it that way
I'm sure that he meant atomic number, since atomic weights are non-integer, except for Carbon.
Personally, I favor naming them after scientists - this is what 95% of the world's laboratories in every field do. The two computers in my dad's lab are Watson and Crick (he doesn't even work with DNA). Substitute other sorts of famous people; presidents, athletes, whatever.
The anime characters are good, if that's what people in your group can remember. One lab I was in that had a lot of computers used deities; Linux were Hindu deities, NT were Greek, and Irix were Egyptian. We added a Mac (OS X) which I named Arawn (Welsh deity).
With 200 machines, you're gonna run out of pet names really fast, so I think you'd need to assign a whole new category of names to each busines, so Joe's Delivery could get Rolling Stones songs, and John's Delicatessen could get war criminals. That would be cool, and that way any administrative subdivisions could use naming conventions that they were good at remembering.
Oh! I have an idea, you could assign each company a word (Winter and Dog, say) and name every computer associated with that company that word, in a different language. All of the web-servers could be french (Hiver and Chien?), the POP servers spanish (Invierno and Perro) and so forth.
The good and new comes from no quarter where it is looked for, and is always something different from what is expected.
Actually, he's probably referring to the three living dwarves. Only Grumpy, Bashful and Doc are still alive.
Sleepy was killed in 1968 when he accidently drove off a cliff (most people who know Sleepy dispute the police report that indicated alcohol was to blame).
Sneezy died of natural causes in 1973 (pollen counts were extremely high that year).
Happy and Dopey were found dead in a hotel room in 1982 of an aparent heroin overdose.
That still doesn't beat sexual positions.
"Hey, would you try DoggyStyle? I can't get in.
RC
Thank you, I just hit an all time low when I just looked down at my dev machine I am at right now, realizing my machine's name. The label I happen to see upon the face...
BORON
"It takes many nails to build a crib, but one screw to fill it."
Create subdomains based upon server function. w.foo.com for web, f.foo.com for file services, d.foo.com for DNS, etc. Expand to two-digit subdomains, *.dx.foo.com or *.w9.foo.com if you need more.
Skip the themes for individual server names. You can use themes for DNS subdomains, but you don't need to actually name the "gemini" server group *.gemini.foo.com, but you can call the *.g.foo.com server group the gemini group.
You don't need to throw any reference to the operating system in the DNS name. If you replace a server with one from a different OS (like you migrate your database from HPUX to AS/400 or Linux), then you have to run around to several places and change the DNS name that other boxes point to. It also allows you to cluster mixed operating systems (good for reliability), and to transition from one OS to the other.
Finally, name your servers numerically as you add them to each sub-function group. Old servers that are slow and coming off lease soon will have lower numbers than higher ones. Just start with A0000001 for the first one in each domain, and go. If there are too many servers starting with A, then be slightly redundant and have the first letter of the server name match the single-letter subdomain. The first DNS server would be d00000001.d.foo.com.
"Ohmigod! Britney's ports are all open! She's getting rooted like crazy!"
"If he thinks he can hide and run from the United States and our allies, he's sorely mistaken." Bush on bin Laden
A:Boot up?
B:Which server?
A:Up.
B:Up who?
A:The server.
B:Which?
A:Boot up.
B:Boot up what server?
A:No no what server should stay up!
B:I don't know.
A:No no that's our web server.
B:Your web server is "I don't know"?
A:Yes. But nevermind, we need to boot up.
B:What server?
A:What server should stay up.
B:I'm ASKING YOU THAT! WHAT SERVER SHOULD STAY UP?
A:Certainly.
B:Oh at last! So certainly should stay up. Ok, so I should boot what server?
A:No no no, what server should stay up!
B:Certainly.
A:OK, so now boot up!
B:AAAAARGH! What does that server do?
A:It's a mail server.
B:So, what you get mail what server does it say in the headers it's from?
A:No no, what server's our web server. It says it's from up.
B:What do you mean up? Mail can't come from up!
A:It can if it's our mail server.
B:You're mail server is called "it" and it should boot it up?
A:No no no! It's our DNS server! We should be booting up!
B:So we should be booting it up?
A:No. We should be booting up.
B:THAT'S WHAT I SAID!
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