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The Dice Project


The Infrastructure Unit operates the following general services across three sites: Informatics Forum, Appleton Tower, JCMB. Each site is set up so that it can operate as autonomously as possible, while at the same time providing redundant services to the other sites.

For the decant out of Appleton Tower we are operating the Forrest Hill and Wilkie buildings as virtual floors of AT, to minimise the amount of setup and reinstallation work required. There are edge switches only, with core infrastructure being provided from Appleton Tower. There are separate pages showning the network arrangements for Forrest Hill and Wilkie.

Network infrastructure and services

Each site's ether switch configuration has been tailored to the particular circumstances. At the time of writing (September 2015) we have 170 network switches in the Forum, 7 switches in Appleton Tower, 20 switches in Forrest Hill, 14 switches in Wilkie Building, and 3 switches in JCMB.

JCMB and the Forum also each have pair of FibreChannel fabrics. The Appleton Tower fabric has been discontinued, with the switches now being used as spares. FC is generally now being deprioritised.

The Forum and Appleton Tower each have four network infrastructure machines, as follows:

At JCMB we have only three machines: one combining the first three roles above, a second (VM) acting as external nameserver, and a third acting primarily as console server but set up so as to be able to take on the network roles if required.


Each site has one "console server" machine, acting as a central point for all of the site's IPMI, KVM and Lantronix-serial consoles. In addition, they act as console server for each other; and in a few cases we have an off-site console server set up for critical machines. There's also a console server on a VM for the Forum self-managed server room consoles, primarily to make access control easier.


A nagios monitoring service is integrated with our machine configuration system. We have two nagios machines:

The primary is a real machine, to minimise dependencies, and the secondary a VM.

Authentication services

We use kerberos for authentication. There is one master KDC, in the Forum, and one slave KDC at each site. The iFriend master KDC is in the Forum, with a slave in Appleton Tower, and an additional slave at KB (this one is non-operational and purely to provide a backup away from the central area)

Although we don't make a lot of use of kx509 at the moment, we still run a kx509 service. There are currently two KCAs, both on VMs.

Most web authentication now uses cosign. We currently have cosign servers (physical machines) in the Forum and Appleton Tower. These also co-host the iFriend KDCs. These services are not suitable for co-locating with the main KDCs for security reasons.

Hosts and services requiring a locally-signed X.509 certificate obtain this using the sixkts service. As this is not a high-availability requirement, we currently have one sixkts server on a VM.

Directory services

The OpenLDAP master is currently in the Forum, and there are site slaves in the Forum, Appleton Tower and JCMB. There are also four VM lightweight slave servers. These seven slaves provide all client/server traditional LDAP provision via sssd on SL7. In addition, all SL6 DICE machines also currently run a full slave configuration.

Account management (prometheus)

The prometheus system runs on a VM in the Forum. This would not be an easy service to replicate, but immediate availability is not a requirement and we could move the service to another machine should the main one be unavailable. This could be either the development server or the JCMB OpenLDAP server (which is kept up to date nightly with prometheus data) or indeed another VM, as decided at the time.

Infrastructure Unit Kit Lists

Linux servers

Real machines, sorted by date and then hostname:
Name Type Location Role S/N P/O & date Warranty Replace UPS
(if non-building)
(GPS receiver) ACUTIME 2000 Forum roof Timestamps for NTP S1 82175548 a628299 2005-01-31 ?? as and when   (Included here for completeness)
crystal GX745 Forum 5A closet NTP S1, DHCP (B) 428903J ikb0153 2007-06-22 3Y as and when   "Real" serial port required
hickox R200 Forum server room testloghost C560D4J inf0488 2009-06-30 3Y ??    
slatkin R310 JCMB server room Formerly KB netServ, consoles, ifriend KDC slave (unused) 4WL3C5J inf1642 2012-05-10 5Y 2016-17 3kVA JS0510018437 Could become wallace
darwin R320 AT server room extDNS, extNTP CB3YC5J inf1748 2012-06-18 5Y ?? AT comms Formerly norrington
linnaeus R320 Forum server room extDNS, extNTP BB3YC5J inf1748 2012-06-18 5Y ??   Formerly elder
hanlon R210 Forum server room cosign, iFriend KDC master 6LQM9X1 inf2539 2013-03-28 5Y 2017-18    
mcintyre R210 AT server room cosign, iFriend KDC slave 31JFWX1 inf2539 2013-03-28 5Y 2017-18    
rattle R320 Forum server room Forum netServ, site DNS, OpenVPN, DHCP (static) G1KL9X1 inf2540 2013-03-28 5Y 2017-18 3kVA JS0510014805  
gatti R320 AT server room AT netInf, DHCP BKZKT02 inf3726 2014-03-18 5Y 2018-19 AT comms  
grepon R320 AT server room AT consoles 4KZKT02 inf3726 2014-03-18 5Y 2018-19    
knussen R320 Forum server room Forum extRt 9CKKT02 inf3719 2014-03-18 5Y 2018-19 3kVA JS0511022795  
curtis R220 JCMB server room JCMB KDC C4B3952 inf5359 2015-04-29 5Y 2019-20   Replaces hati
heaton R220 Forum server room Forum KDC 35B3952 inf5359 2015-04-29 5Y 2019-20   Replaces fenrir
moffat R220 AT server room AT KDC H2B3952 inf5359 2015-04-29 5Y 2019-20   Replaces skoll
runnicles R320 AT server room AT extRt 9HJ8952 inf5382 2015-05-07 5Y 2019-20 AT comms  
campbell R320 AT server room LDAP site-slave D4J8952 INF5380 2015-05-07 5Y 2019-20   Replaces blackwell
nelson R320 Forum server room LDAP site-slave J2J8952 INF5380 2015-05-07 5Y 2019-20   Replaces mckinley
polly R320 Forum server room LDAP master 34J8952 INF5380 2015-05-07 5Y 2019-20   Replaces reeves
Machines below are outwith the current three-year kit planning period (F/Y 2017-20)
copernicus R330 AT server room loghost 4RTZGD2 inf6533 2016-06-13 5Y 2020-21? AT comms Replaces tycho
dutoit R330 Forum server room Forum netInf 4SQYGD2 inf6532 2016-06-13 5Y 2020-21? 3kVA XL QS0348111013  
klaxon R330 Forum server room Nagios master DS6RGD2 inf6531 2016-06-13 5Y 2020-21?    
klein R330 JCMB server room LDAP site-slave/prometheus DR DS5SGD2 inf6531 2016-06-13 5Y 2020-21?   Replaces hall
maytals R330 Forum server room KDC master 5RM6DK2 inf7210 2017-06-02 5Y 2021-22??   Replaces bevan
pappano R330 AT server room AT netServ 5RZ4DK2 inf7207 2017-06-02 5Y 2021-22?? AT comms Replaces norrington
pinnock R330 JCMB server room KB extRt, netInf, DHCP 5SJ6DK2 inf7208 2017-06-02 5Y 2021-22??   Replaces elder
sinopoli R330 JCMB server room KB consoles 5SC5DK2 inf7209 2017-06-12 5Y 2021-22??   Replaces slatkin
charmoz R330 Forum server room Forum consoles 3FQ6DP2 INF7975 2018-04-04 5Y 2023-24??   Replaces blatiere
hazlewood R330 Forum server room Forum netServ 2WBFDP2 INF7976 2018-04-04 5Y 2023-24??   Replaces rattle

Virtual machines, sorted loosely by name and functionality:
Name Location Role Comments
buchanan IF kca, misc  
dammers KB sixkts, kca  
descartes KB Test RADIUS server  
dingaling AT Nagios secondary  
euclid AT Test RADIUS server  
handbag IF Wallet server  
huxley IF Test nameserver/timeserver  
pelerins IF Forum self-managed consoles  
pythagoras IF Test RADIUS server  
vandellas IF Prometheus master  
wallace KB extDNS  
damflask IF LDAP lightweight slave  
hutter KB LDAP lightweight slave  
redmires IF LDAP lightweight slave  
schneider AT LDAP lightweight slave  

Machines in the Forum and AT server rooms are covered by the inbuilt UPSes, and are shown with a blank in the "UPS" column unless they have some additional provision. Machines in the JCMB server room may be powered by one of the "rack" UPSes, and in this case are shown with a blank in the column unless they have some additional provision.


(Sorted by location and role, more or less...)
Name Type Role Location S/N P/O & date Rating Battery replaced Comments
("AT comms")
Smart-UPS 3000 RM AT core network comms cabinet JS0510018447 a631778 2005-07-11 3kVA 2013-02 Formerly AT5; battery moved from AT8 (RT#63576)
("AT comms")
Smart-UPS 3000 RM AT core network comms cabinet JS0714011688 ikb0141 2007-06-19 3kVA 2013-09 Formerly AT8
at6.ups.at.net Smart-UPS 3000 RM AT6 AT6 comms room JS0511022967 a631778 2005-07-11 3kVA 2014-10 Provides PoE for phones
at7.ups.at.net Smart-UPS 3000 RM AT7 AT7 comms room JS0714011678 ikb0141 2007-06-19 3kVA   Provides PoE for phones
core.ups.f.net SMART-UPS 3000 RM XL Forum core0 comms racks QS0348111013 a614789 2004-02-04 3kVA 2017-09  
netInf.ups.f.net Smart-UPS 3000 RM Forum core1 comms racks JS0511022795 a631778 2005-07-11 3kVA 2017-03  
netServ.ups.f.net Smart-UPS 3000 RM Forum core2 comms racks JS0510014805 a631753 2005-06-15 3kVA 2016-03  
(USB) Smart-UPS 1500 Test & development AT-7.06a YS0315121217 a609907 2003-08-14 1500VA 2013-03  
rack0.ups.kb.net Smart-UPS 3000 RM JCMB server room Rack 0 JS0617023553 Probably a637388 2006-06-27 3kVA 2016-11  
rack1.ups.kb.net Smart-UPS 3000 RM JCMB server room Rack 1 JS0511022966 a631778 2005-07-11 3kVA 2016-07  
rack2.ups.kb.net Smart-UPS 3000 RM JCMB server room Rack 2 JS0510018437 a631778 2005-07-11 3kVA 2017-02  
rack3.ups.kb.net Smart-UPS 3000 RM JCMB server room Rack 3 JS0617023554 a637388 2006-06-27 3kVA 2014-10 Formerly AT4
(USB) Smart-UPS 750 RM GPS clock and server Forum 5A closet AS0444223639 a627391 2004-12-02 750VA ??  

There's a separate table listing which batteries are required by our various UPS models.

IUkit.html,v 1.441 2018/04/24 13:46:33 gdmr Exp

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