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[Bug 1647432] [NEW] Multiple SIGHUPs to keepalived might trigger re-election

 

Public bug reported:

As the title says, multiple SIGHUPs that are sent to the keepalived
process might cause it to forfeit mastership and re-negotiate a new
master (which might be the original master). This means that when, for
example, associating/disassociating 2 floatingips in quick succession
(each triggers a SIGHUP), the master node will forfeit re-election
(causing it to switch to BACKUP, thus removing all the remaining FIP's
IPs and severing connectivity.

** Affects: neutron
     Importance: High
     Assignee: John Schwarz (jschwarz)
         Status: In Progress


** Tags: l3-ha

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https://bugs.launchpad.net/bugs/1647432

Title:
  Multiple SIGHUPs to keepalived might trigger re-election

Status in neutron:
  In Progress

Bug description:
  As the title says, multiple SIGHUPs that are sent to the keepalived
  process might cause it to forfeit mastership and re-negotiate a new
  master (which might be the original master). This means that when, for
  example, associating/disassociating 2 floatingips in quick succession
  (each triggers a SIGHUP), the master node will forfeit re-election
  (causing it to switch to BACKUP, thus removing all the remaining FIP's
  IPs and severing connectivity.

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