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From wido <...@git.apache.org>
Subject [GitHub] cloudstack pull request #1707: CLOUDSTACK-9397: Add Watchdog timer to KVM In...
Date Thu, 13 Oct 2016 10:32:44 GMT
GitHub user wido opened a pull request:

    https://github.com/apache/cloudstack/pull/1707

    CLOUDSTACK-9397: Add Watchdog timer to KVM Instance

    The watchdog timer adds functionality where the Hypervisor can detect if an
    instance has crashed or stopped functioning.
    
    When the Instance has the 'watchdog' daemon running it will send heartbeats
    to the /dev/watchdog device.
    
    If these heartbeats are no longer received by the HV it will reset the Instance.
    
    If the Instance never sends the heartbeats the HV does not take action. It only
    takes action if it stops sending heartbeats.
    
    This is supported since Libvirt 0.7.3 and can be defined in the XML format as
    described in the docs: https://libvirt.org/formatdomain.html#elementsWatchdog
    
    To the 'devices' section this will be added:
    
      <watchdog model='i6300esb' action='reset'/>
    
    In the agent.properties the action to be taken can be defined:
    
      vm.watchdog.action=reset
    
    The same goes for the model. The Intel i6300esb is however the most commonly used.
    
      vm.watchdog.model=i6300esb

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/wido/cloudstack watchdog-timer

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/cloudstack/pull/1707.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #1707
    
----
commit 8046ba679be53abd7a70657d7f8ed00f2225cf46
Author: Wido den Hollander <wido@widodh.nl>
Date:   2016-05-31T09:31:27Z

    CLOUDSTACK-9397: Add Watchdog timer to KVM Instance
    
    The watchdog timer adds functionality where the Hypervisor can detect if an
    instance has crashed or stopped functioning.
    
    When the Instance has the 'watchdog' daemon running it will send heartbeats
    to the /dev/watchdog device.
    
    If these heartbeats are no longer received by the HV it will reset the Instance.
    
    If the Instance never sends the heartbeats the HV does not take action. It only
    takes action if it stops sending heartbeats.
    
    This is supported since Libvirt 0.7.3 and can be defined in the XML format as
    described in the docs: https://libvirt.org/formatdomain.html#elementsWatchdog
    
    To the 'devices' section this will be added:
    
      <watchdog model='i6300esb' action='reset'/>
    
    In the agent.properties the action to be taken can be defined:
    
      vm.watchdog.action=reset
    
    The same goes for the model. The Intel i6300esb is however the most commonly used.
    
      vm.watchdog.model=i6300esb

----


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