Linux Working Group

Invitees - Attendees

• Invited: Anthony, Adrian, Guoxiang, Clayton, Lori, Fraser, Nathan, Dave, Omar, Devon, Todd, Nick, Lawrence

Review and accept previous meeting minutes.

• CsLWGMeeting20220323

Last meeting's tasks [10 minutes]

• "Dirty Pipe" - https://rt.uwaterloo.ca/Ticket/Display.html?id=1213217
  • Lori - setuid binaries in user filesystems? Mount a survey (per term?). Set ACL on snapshots? https://rt.uwaterloo.ca/Ticket/Display.html?id=1213685 * in upcoming Ceph version there is a "root squash" feature - add to to-do list
• linux.student.cs loadaverage is much higher and more variable than in the past.
  • Anthony - will create a ticket for monitoring processor data - will work with Devon
    • Prometheus is installed on most systems
      • exporters that provides web data that can be scraped
      • easy to use and setup
      • query language is easy to use
    • any way to get a breakdown by core? top, htop, cat /proc/loadavg (latter is low impact)
    • Fraser: do we have load average graphs? Devon - yes:
      • https://icinga.cscf.uwaterloo.ca/icingaweb2/monitoring/host/services?host=ubuntu2004-010.student.cs.uwaterloo.ca#!/icingaweb2/monitoring/service/show?host=ubuntu2004-010.student.cs.uwaterloo.ca&service=Load
      • Lawrence - any way to test timing of interactive response?
      • Devon - possibly, maybe there's a python library?
  • Fraser - would like to see a combined load average all on one screen
    • Devon - yes we can do that
    • Lori - would also like that for DFSc
    • Lori - would also like to see network usage (netstat -ai )
      • Devon - there are some stats - are they sufficient? needs to be graphed
• Clayton - document process of adding hosts to AD and move to a generally accessible place
• Lawrence / RSG - update jerusalem and graceland to mount new NFS share - RT#1194157
• Dave - put up Beta version of Virtual Host Index / Anthony to create a ticket - RT#1211603 -> working on it
• Fraser to create a ticket for updating the Graphics Lab machines
• Anthony - will create a ticket for monitoring processor data - will work with Devon
• Fraser - create request for Devon for combined general use cpu load graph (and possibly other metrics)
• Lori - create ticket for Devon to create combined graph for DFSc
• Lori - create RT for graphing network statistics data
• Lawrence - follow-up with SuperMicro re: RT#1079451