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Add limit (maximum simultaneous commands) and throttle (delay between commands) to Phage

Authored by epriestley on Feb 22 2017, 9:49 PM.



Ref T12218. Ref T2794. This just provides a couple of general purpose tools to slow Phage down a bit if the speed is getting TOO EXTREME.

In particular, secure updates from itself so if all 4 nodes get hit simultaneously the deploy doesn't work. It deploys cleanly with --limit 1.

A separate change to the phage remote workflow in Instances exposes these options as flags:

  • --limit: Run only this many commands simultaneously.
  • --throttle: Wait this long between starting commands (for example, --throttle 0.25 will only start 4 commands per second).
Test Plan
  • Ran phage remote status on secure with various --throttle and --limit arguments, and without any arguments.
  • Ran phage remote upgrade --limit 1 on secure, got a clean upgrade.

Diff Detail

rPHU libphutil
Lint Not Applicable
Tests Not Applicable