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From "ASF GitHub Bot (JIRA)" <>
Subject [jira] [Commented] (CLOUDSTACK-9782) Host HA
Date Mon, 10 Apr 2017 10:09:41 GMT


ASF GitHub Bot commented on CLOUDSTACK-9782:

Github user rhtyd commented on the issue:
    @koushik-das sorry could not get back to you earlier as I was busy with other work. I've
replied on the ML thread to address several queries [1] that lists the advantages of this
host-ha framework over existing building blocks and I've explained why we needed to implement
it. Please have at the reply, if you still have any reservations let us know on the ML thread,
we'll get back to you.
    Note: As stated earlier in the ML thread as well -- *this is not a new VM HA framework*,
the framework implementation is agnostic of the host-specific HA-provider to allow any custom
host-ha plugin to be developed that is specific to a hypervisor as each hypervisor may have
their own specific tools/infra/algorithms to check resource (disk/vm etc) activities, including
scope for future extentions for other HA-able resources.

> Host HA
> -------
>                 Key: CLOUDSTACK-9782
>                 URL:
>             Project: CloudStack
>          Issue Type: New Feature
>      Security Level: Public(Anyone can view this level - this is the default.) 
>            Reporter: Rohit Yadav
>            Assignee: Rohit Yadav
>             Fix For: Future,
> CloudStack lacks a way to reliably fence a host, the idea of the host-ha feature is to
provide a general purpose HA framework and implementation specific for hypervisor that can
use additional mechanism such as OOBM (ipmi based power management) to reliably investigate,
recover and fencing a host. This feature can handle scenarios associated with server crash
issues and reliable fencing of hosts and HA of VM.
> FS:

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