Wikimedia Cloud Services team/Onboarding Chico/Sessions

Chico Questions

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Flapping alerts in shinken T161898

Diamond

• Is there a reason for collecting less metrics about puppet?
  • We have an addapted minimalpuppetagent.py that collects a lot less than the original puppetagent.py (it alsos add a _check_sudo method)
  • Maybe .puppetagent.changes.total, puppetagent.events.failure puppetagent.events.success and servers.hostname.puppetagent.events.total could be useful as well?
  • https://diamond.readthedocs.io/en/latest/collectors/PuppetAgentCollector/

Puppet errors analysis

• https://phabricator.wikimedia.org/P6712 (js to get and play with json datapoints)
• I was thinking of doing a simple sum and tolerating somewhere between 3 and 5 failures before warning
  • See https://graphite-labs.wikimedia.org/render/?from=-8weeks&height=500&width=1200&target=sumSeries(tools.tools-%2A.puppetagent.failed_events)
  • P6712
• Ended up with -W 5 -C 15 on https://gerrit.wikimedia.org/r/411315
• Track Flaps

Bastion alerts

• Create alerts specfic to bastion

Using puppet on VPS

• Docs

https://wikitech.wikimedia.org/wiki/Help:Standalone_puppetmaster

PAWS

• How to test changes?
  • Staging env

• tools-beta

K8s logging retention

• We can force pods to restart after 30 days, but it sounds like a terrible idea
  • Revisit after tools-beta

Other tasks

• Is there something else I should be looking into?

2018 - 02 - 13

How is monitoring configured?

• We have Icinga being phased out for prometheus in productions servers
• Shinken in lab instances
  • My goal is to add alerts for tools-bations, seems it should be done in Icinga/prometheus task T186552 https://phabricator.wikimedia.org/T186552
    • We already collect CPU and IO data for tools-bations (https://tools.wmflabs.org/nagf/?project=tools#h_tools-bastion-03_cpu )
      • I see we can use a check_graphite_series_threshold to get the loadavg like we are doing with iowait (from https://graphite-labs.wikimedia.org/ )
        • There is no total_cpu metric, we need number of cores to know what to set for warning and critical in loadavg

https://etherpad.wikimedia.org/p/chicoandchase https://graphite-labs.wikimedia.org/render/?width=674&height=377&_salt=1518534146.333&target=tools.tools-bastion-03.cpu.total.idle&from=-30d tc ifb tc an only manipulate send queues iotop iotop -ao https://graphite-labs.wikimedia.org/render/?width=674&height=377&_salt=1518535047.584&target=tools.tools-bastion-03.nfsiostat.labstore.ops&target=tools.tools-bastion-03.nfsiostat.labstore.ops_per_sec&target=tools.tools-bastion-03.nfsiostat.labstore1003.ops&target=tools.tools-bastion-03.nfsiostat.labstore1003.ops_per_sec

https://graphite-labs.wikimedia.org/render/?width=674&height=377&_salt=1518535115.171&target=tools.tools-bastion-03.nfsiostat.mounts.data_project.write.kilobytes&target=tools.tools-bastion-03.nfsiostat.mounts.data_project.read.kilobytes&from=-30d

https://graphite-labs.wikimedia.org/render/?width=674&height=377&_salt=1518535177.867&target=tools.tools-bastion-03.nfsiostat.mounts.mnt_nfs_labstore-secondary-tools-project.read.kilobytes&target=tools.tools-bastion-03.nfsiostat.mounts.mnt_nfs_labstore-secondary-tools-project.write.kilobytes&from=-30d

WMCS Phabricator etiquete

• Do we have documentation about how to triage tasks and move them arround projects and workboards?
  • TBD

Cloud VPS / Horizon stuff

• I am still unfamiliar with the interfaces and common questions, maybe I should create a temp project and go through docs.
  • make a task for a chicotestproject T187213
• Where are things configured?
  • Wikitech
  • operations-puppet repo
  • Horizon

https://wikitech.wikimedia.org/wiki/Hiera:tools

~/git/wmf/puppet cpettet@cair>ls hieradata/labs/tools

toolsadmin.wikimedia.org

Wikitech docs

• Portal namespace for user facing docs
• /admin subpage for WMCS team

Other tasks

• Is there something else I should be looking into?
  • Let's start slow and I'll try to integrate you into my sort of normal workflow
  • Flapping alerts in shinken
    • host* as way to get % of hosts in failure