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Contents

Intro

  • Solar Lottery is a team rotation scheduler, inspired by PagerDuty OnCall, and its predecessor the early amazon.com pager tool.
  • Name from a Philip K. Dick novel "Solar Lottery".
  • The main motivation to develop was to automate the Sustaining Engineering Team (SET) schedulng.
  • Not a traditional queue, scheduling is based on probabilities, exponentially increasing since the last serve time.
  • Features (basic):
    • Users have skills, rotations have needs, match and constrain.
    • Grace periods after serving shifts, apply within the rotation.
    • User "unavailable" events.
    • Complete manual control over shifts, or "Autopilot"

Use cases

  • Automate existing:
    • R&D ice breakers.
    • OKR status review.
    • SET.
  • New rotations:
    • Monthly tech talks.
    • Blog posts.
    • Release testing (10 people enough?)
    • Cloud Ops
  • Integrations team:
    • Rotating scrum master (triage, run the meeting, daily checks).
    • Ops duty - plugin review, releases, config on community.
    • Community duty.

Limitations

  • Command-line only, optimized for debugging, not usability.
  • Slow performance - unoptimized RPC access, O(N**2) forecasting.
  • No cron yet - simulated for the demo with /lotto rotation autopilot --debug-run <date>.
  • Practically no tests, the code can use a little refactoring.

Demo notes

  • Setting "unavailabe" times - supported but not explicitly demoed.
    • Grace after serving a shift.
    • Can create custom "Unavailable" intervals.
  • Logs tee-ed as DMs.
    • Find very useful for debugging.
    • Started as debugging (got annoyed grepping logs).
    • INFOs are useful as a "transparency" change log, DEBUGs for customer support.

Next Steps and TODO

  • Intake the plugin - review, transfer
  • Missing MVP features:
    • /lotto shift leave, a little non-trivial for started shifts.
    • Cron, HA-aware.
    • Import/Export - for backups, especially while in beta
    • Tune and add tests to the solar-lottery.go **Scheduler**, specifically it appears to un-randomize users while sorting, or something of the sort (a bug?). Measure the algorithm performance and efficiency (error rate) on at least one scenario/benchmark.
  • UI, a more usable command set - intuitive, less verbose.
  • HTTP API.
  • Caching the RPC/KV access within a single request.
  • Submit to marketplace
  • Features:
    • A "Rotation Channel".
      • Tee relevant logs.
      • Automatically update the channel header.
    • History, archiving user events.
    • Past statistics.
    • Rotation name-spacing/isolation and admin access control.
    • Alternate scheduling strategies.
      • traditional queue.
      • better fairness, use all history not just last served date.
    • ◈ Integration with the Welcome Bot, Workflow, Todo, Autolink plugins.
    • ◈◈ Integration with the Calendar plugins.

Demo Setup

Team ABC (full stack)

  • @aaron.medina - lead(3), server(3), webapp(3)
  • @aaron.peterson - server(1), webapp(2), mobile(1)
  • @aaron.ward - webapp(2)
  • @albert.torres - server(1)
  • @alice.johnston - server(2), webapp(1)

Team DEF (perf)

  • @deborah.freeman - lead(2), server(3), webapp(2)
  • @diana.wells - sever(3)
  • @douglas.daniels - server(4)
  • @emily.meyer - server(3), webapp(1)
  • @eugene.rodriguez - server(2), webapp(1)
  • @frances.elliott - webapp(3), mobile(3)

Team GHIJ (full stack)

  • @helen.hunter - lead(3),webapp(1),server(1)
  • @janice.armstrong - server(2), webapp(1)
  • @jeremy.williamson - webapp(2)
  • @jerry.ramos - server(2), webapp(2)
  • @johnny.hansen - webapp(1), server(1), mobile(1)
  • @jonathan.watson - server(2)

Team KL (SRE)

  • @karen.austin - lead(2), sre(3)
  • @karen.martin - webapp(1), sre(1), build(3)
  • @kathryn.mills - server(2), sre(3)
  • @laura.wagner - sre(2)

Team MN (full stack)

  • @margaret.morgan - lead(3), server(2)
  • @mark.rodriguez webapp(1), server(1)
  • @matthew.mendoza webapp(3), server(2)
  • @mildred.barnes webapp(2), server(2)
  • @nancy.roberts webapp(2), server(3), mobile(1)

Team R (mobile)

  • @ralph.watson - lead(2), mobile(3), webapp(2)
  • @raymond.austin - mobile(2), webapp(1)
  • @raymond.fisher - mobile(2), webapp(1)
  • @raymond.fox - mobile(2), server(1), webapp(1)

Demo

/lotto demo clean-init

/lotto debug-clean

/lotto user qualify -k ABC-FS1 -l intermediate -u @aaron.medina,@aaron.peterson,@aaron.ward,@albert.torres,@alice.johnston
/lotto user qualify -k DEF-PERF -l intermediate -u @deborah.freeman,@diana.wells,@douglas.daniels,@emily.meyer,@eugene.rodriguez,@frances.elliott
/lotto user qualify -k GHIJ-FS2 -l intermediate -u @helen.hunter,@janice.armstrong,@jeremy.williamson,@jerry.ramos,@johnny.hansen,@jonathan.watson
/lotto user qualify -k KL-SRE -l intermediate -u @karen.austin,@karen.martin,@kathryn.mills,@laura.wagner
/lotto user qualify -k MN-FS3 -l intermediate -u @margaret.morgan,@mark.rodriguez,@matthew.mendoza,@mildred.barnes,@nancy.roberts
/lotto user qualify -k R-MOBILE -l intermediate -u @ralph.watson,@raymond.austin,@raymond.fisher,@raymond.fox

/lotto user qualify -k lead -l intermediate -u @deborah.freeman,@karen.austin,@ralph.watson
/lotto user qualify -k lead -l advanced -u @aaron.medina,@helen.hunter,@margaret.morgan

/lotto user qualify -k server -l beginner -u @aaron.peterson,@albert.torres,@helen.hunter,@johnny.hansen,@mark.rodriguez,@raymond.fox
/lotto user qualify -k server -l intermediate -u @alice.johnston,@eugene.rodriguez,@janice.armstrong,@jerry.ramos,@jonathan.watson,@kathryn.mills,@margaret.morgan,@matthew.mendoza,@mildred.barnes
/lotto user qualify -k server -l advanced -u @aaron.medina,@deborah.freeman,@diana.wells,@emily.meyer,@nancy.roberts
/lotto user qualify -k server -l expert -u @douglas.daniels

/lotto user qualify -k webapp -l beginner -u @emily.meyer,@eugene.rodriguez,@helen.hunter,@janice.armstrong,@johnny.hansen,@karen.martin,@mark.rodriguez,@mildred.barnes,@raymond.austin,@raymond.fisher,@raymond.fox
/lotto user qualify -k webapp -l intermediate -u @aaron.peterson,@aaron.ward,@deborah.freeman,@jeremy.williamson,@jerry.ramos,@nancy.roberts
/lotto user qualify -k webapp -l advanced -u @aaron.medina,@frances.elliott,@matthew.mendoza

/lotto user qualify -k mobile -l beginner -u @johnny.hansen,@aaron.peterson,@nancy.roberts
/lotto user qualify -k mobile -l intermediate -u @raymond.austin,@raymond.fisher,@raymond.fox
/lotto user qualify -k mobile -l advanced -u @ralph.watson,@frances.elliott

/lotto user qualify -k sre -l beginner -u @karen.martin
/lotto user qualify -k sre -l intermediate -u @laura.wagner
/lotto user qualify -k sre -l advanced -u @karen.austin,@kathryn.mills

/lotto user qualify -k build -l advanced -u @karen.martin

/lotto demo icebreaker-init

/lotto rotation add -r icebreaker --period w --start 2019-12-17 --grace 3 --size 2

/lotto rotation join -r icebreaker -s 2019-12-17 -u @aaron.medina,@aaron.peterson,@aaron.ward,@albert.torres,@alice.johnston,@deborah.freeman,@diana.wells,@douglas.daniels,@emily.meyer,@eugene.rodriguez,@frances.elliott,@helen.hunter,@janice.armstrong,@jeremy.williamson,@jerry.ramos,@johnny.hansen,@jonathan.watson,@karen.austin,@karen.martin,@kathryn.mills,@laura.wagner,@margaret.morgan,@mark.rodriguez,@matthew.mendoza,@mildred.barnes,@nancy.roberts,@ralph.watson,@raymond.austin,@raymond.fisher,@raymond.fox
/lotto rotation show -r icebreaker

/lotto demo icebreaker-forecast

/lotto rotation guess -r icebreaker -s 0 -n 20
/lotto rotation forecast -r icebreaker -s 0 -n 20 --sample 100

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/lotto demo icebreaker-autopilot

/lotto rotation autopilot -r icebreaker --notify 3 --fill-before 5
/lotto rotation autopilot -r icebreaker --debug-run 2019-12-11
/lotto rotation autopilot -r icebreaker --debug-run 2019-12-12
/lotto rotation autopilot -r icebreaker --debug-run 2019-12-13
/lotto rotation autopilot -r icebreaker --debug-run 2019-12-17
/lotto rotation autopilot -r icebreaker --debug-run 2019-12-21
/lotto rotation autopilot -r icebreaker --debug-run 2019-12-25
/lotto rotation autopilot -r icebreaker --debug-run 2019-12-29
/lotto rotation autopilot -r icebreaker --debug-run 2019-12-30

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/lotto demo SET-init

  1. 6 "teams", 5 people in rotation, 1 grace shift after each serve.
  2. require exactly 1 lead.
  3. require a minimum of 2 each server and webapp, any level.
  4. require exactly 1 mobile, any level.
  5. require exactly 1 from each FS team.
  6. require no minimum, max 1 from each of the other teams.
/lotto rotation add  -r SET --period m --start 2020-01-16 --grace 1 --size 5

/lotto rotation need -r SET --skill webapp --level beginner --min 2
/lotto rotation need -r SET --skill server --level beginner --min 2
/lotto rotation need -r SET --skill mobile --level beginner --min 1
/lotto rotation need -r SET --skill lead --level beginner --min 1 --max 1

/lotto rotation need -r SET --skill ABC-FS1 --level beginner --min 1 --max 1
/lotto rotation need -r SET --skill GHIJ-FS2 --level beginner --min 1 --max 1
/lotto rotation need -r SET --skill MN-FS3 --level beginner --min 1 --max 1
/lotto rotation need -r SET --skill DEF-PERF --level beginner --min -1 --max 1
/lotto rotation need -r SET --skill KL-SRE --level beginner --min -1 --max 1
/lotto rotation need -r SET --skill R-MOBILE --level beginner --min -1 --max 1

/lotto rotation join -r SET -u @aaron.medina,@aaron.peterson,@aaron.ward,@albert.torres,@alice.johnston,@deborah.freeman,@diana.wells,@douglas.daniels,@emily.meyer,@eugene.rodriguez,@frances.elliott,@helen.hunter,@janice.armstrong,@jeremy.williamson,@jerry.ramos,@johnny.hansen,@jonathan.watson,@karen.austin,@karen.martin,@kathryn.mills,@laura.wagner,@margaret.morgan,@mark.rodriguez,@matthew.mendoza,@mildred.barnes,@nancy.roberts,@ralph.watson,@raymond.austin,@raymond.fisher,@raymond.fox

/lotto rotation show -r SET

/lotto demo SET-forecast

/lotto rotation guess -r SET -s 0 -n 3
/lotto rotation forecast -r SET -s 0 -n 3 --sample 5

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