Linux Working Group

AGENDA LOCKED

Meeting Date

• TEAMS: 2022-05-18

Invitees - Attendees

• Invited: Adrian, Anthony (group leader), Clayton, Guoxiang, Lori, Fraser, Devon, Nathan, Nick, Todd, Dave, Lawrence, Omar
• Present: Adrian, Anthony (group leader), Clayton, Guoxiang, Lori, Fraser, Lawrence

Review and accept previous meeting minutes.

• CsLWGMeeting20220504

Review last meeting's Action Items

• Anthony - create dashboards for monitoring processor data - RT#1224667
  • not yet, Anthony will create a ticket to get things started ... RT#1224667
• Clayton/Fraser - document process of adding hosts to AD and move to a generally accessible place (git) -> https://rt.uwaterloo.ca/Ticket/Display.html?id=1217894 - Fraser to test process on GL machines
  • Fraser: tried a sample and it worked well, but haven't done a large enough sample to say for sure
  • Clayton - issues with binding 22.04 machine to AD
• Dave - put up Beta version of new Virtual Host Index / Anthony to create a ticket - RT#1211603 -> working on it
  • not up yet
• Lori - create ticket for Devon to create combined graph for DFSc
  • Devon has created a combined graph
• Lawrence - follow-up with SuperMicro re: RT#1079451 - ubuntu1804-006 CPU hardware errors - verify CPU being shipped
  • going back to "Plan A" to ship the whole thing
  • Lawrence will get Kimberley to print the label and get Central Stores to pick it up
  • Guoxiang will become the PoC for this issue
• Anthony - update the Purpose field of currently "unused" machines in the Virtual Host Index: some progress, need to make another pass.
  • still working on that, made some progress
• Nathan - create ticket for btrf testing, especially wrt for managing LXC root file size limits
  • Nathan not here today
  • Anthony following btrfs mailing list, they seem to be settling on an approach
• Lawrence/Omar - send out notice regarding upcoming between-term reboots, Anthony - update relevant motd files
  • done
  • stock kernel reversion was not a problem

Proposed Agenda Items

Packaging of suexec-flex on depot.cs - Lawrence

• https://rt.uwaterloo.ca/Ticket/Display.html?id=950947
• probably need to have a discussion between Isaac, Anthony, Nathan
• Adrian - concerned that it may not be complete
• a meeting needs to be had (possibly include Dave and Lori)
• Lori - will book a meeting
• Lori - do we even need suexec-flex? Anthony - good thing to open the meeting with
• Lori - can patches be committed upstream (ie: the package maintainers)

What are custom changes to CSCF kernels? - Lori

 
@ubuntu2004-002% uname -a
Linux ubuntu2004-002 5.4.0-109-generic #123+cscf1 SMP Thu May 5 09:17:14 EDT 2022 x86_64 x86_64 x86_64 GNU/Linux

• Anthony - did make (small) changes
• Anthony will provide a diff list
• Naming: supersedes 5.4.0-109, but would be overwritten by 5.4.0-110
• purposes is to answer questions about cap usage
• Anthony - documented the diffs in the custom kernel - see RT#1224675

Infrastructure ubuntu Lifecycle - Lawrence

• Ubuntu LTS Lifecycle
• where are we at wrt Ubuntu 22.04 - are we on-schedule?
• Anthony - have been discussing this with Dave recently
• Yes - we are on schedule
• Anthony building 22.04 meta-packages
• Lori - RSG is putting 22.04 on grad laptops - needed the driver for WiFi for P15s
• Anthony - there is a ticket for any 22.04 issues - feel free to create child tickets
• Lori - has 22.04 running on several research machines, and it has an updated saltstack
• Lawrence - do we have this? "repurpose an oldest general-use server to be used as the new LTS release dev system"
• Lawrence - do we have diverging process for imaging machines?
• Anthony - will run through the installer by hand just to see what works

home directories - how are they actually created? - Lawrence

• eg: RT#1223596
• Yes, the home directory is there now there
• Adrian: the process in CS-General ("Research) is completely differently than in CS-Teaching
• some discussion of the process ...
• Adrian - it is done manually and he may have done this, in this case. He has been teaching Clayton

Action Items for next meeting

• Anthony - create dashboards for monitoring processor data - RT#1224667
• Clayton/Fraser - document process of adding hosts to AD and move to a generally accessible place (git) -> https://rt.uwaterloo.ca/Ticket/Display.html?id=1217894 - Fraser to test process on GL machines
• Dave - put up Beta version of new Virtual Host Index / Anthony to create a ticket - RT#1211603 -> working on it
• Lawrence - follow-up with SuperMicro re: RT#1079451 - ubuntu1804-006 CPU hardware errors - verify CPU being shipped
• Lori - will book a meeting re: suexec-flex
• Lawrence/Lori - schedule meeting re: home directory creation