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Feature #44107

closed

mon: produce stable election results when netsplits and other errors happen

Added by Greg Farnum about 4 years ago. Updated about 2 years ago.

Status:
Resolved
Priority:
Urgent
Assignee:
Greg Farnum
Category:
-
Target version:
-
% Done:

0%

Source:
Tags:
Backport:
nautilus
Reviewed:
Affected Versions:
Component(RADOS):
Monitor
Pull request ID:
35906

Description

Right now, in netsplits and similar error conditions the monitors do not produce a stable quorum: whichever monitors are excluded will prompt continuous elections by Proposing to whatever peers they can reach.

To accomplish this, add heartbeating between the monitor daemons, use that to generate connection liveness and reliability scores, and use those scores as input to an election algorithm.

https://github.com/ceph/ceph/pull/32336

Related issues 1 (1 open — 0 closed)

Blocks RADOS - Feature #44108: mon: osd: handle 2-(main-)site stretch clusters explicitly, so no admin intervention is needed when a DC diesIn ProgressGreg Farnum

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 #1

Updated by Greg Farnum about 4 years ago

  • Status changed from New to Fix Under Review
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 #2

Updated by Greg Farnum about 4 years ago

  • Blocks Feature #44108: mon: osd: handle 2-(main-)site stretch clusters explicitly, so no admin intervention is needed when a DC dies added
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 #3

Updated by Ken Dreyer about 4 years ago

  • Backport set to nautilus
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 #4

Updated by Neha Ojha about 4 years ago

  • Priority changed from Normal to Urgent

Marking anything we need for octopus as "Urgent".

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 #5

Updated by Greg Farnum about 2 years ago

  • Status changed from Fix Under Review to Resolved
  • Pull request ID changed from 32336 to 35906

Oh, this has been done for ages.

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