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This web page is no longer maintained. Information presented here exists only to avoid breaking historical links.
The Project stays maintained, and lives on: see the Linux-HA Reference Documentation.
To get rid of this notice, you may want to browse the old wiki instead.

1 February 2010 Hearbeat 3.0.2 released see the Release Notes

18 January 2009 Pacemaker 1.0.7 released see the Release Notes

16 November 2009 LINBIT new Heartbeat Steward see the Announcement

Last site update:
2017-12-13 22:10:50

A membership callback can be one of the following events:

  1. OC_EV_MS_NEW_MEMBERSHIP
    • CCM: membership with quorum
    • CRM/CIB quorum: true
    • CRM/CIB actions: update membership instance & contents

    • CRM actions: none (we wait for the CRMd on that node to become active before any CRM action is taken)

      The TE monitors CIB updates and detects and nodes that unexpectedly left - starting/restarting a transition if required

  2. OC_EV_MS_MS_INVALID
    • CCM: membership without quorum
    • CRM/CIB quorum: false
    • CRM/CIB actions: update membership instance & contents

    • DC actions: Invoke the PolicyEngine to ensure the "No Quorum Policy" is observed

  3. OC_EV_MS_NOT_PRIMARY
    • CCM: old membership (not valid any longer)
    • CRM/CIB quorum: no change
    • DC actions: cancel the transition if one is in progress
  4. OC_EV_MS_PRIMARY_RESTORED This event mean the cluster restores to a stable state that has the same membership as before. It also implies it has the same quorum as before.
    • CCM: old membership restored (same membership as before)
    • CRM/CIB quorum: no change
    • CRM/CIB actions: update membership instance
    • DC actions: Start/restart a transition now that everything is now stable (in theory we would have gotten a OC_EV_MS_NOT_PRIMARY before this which would have cancelled the transition)
  5. OC_EV_MS_EVICTED
    • CCM: the client is evicted from ccm.
    • CRM/CIB quorum: false
    • CRM/CIB actions: update membership instance & contents, shut down This should not happen if correct startup/shutdown order is observed.