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From "Eranga Heshan (JIRA)" <>
Subject [jira] [Commented] (CLOUDSTACK-8629) Use Ceph RBD storage pool for writing HA heartbeats
Date Wed, 15 Mar 2017 15:26:41 GMT


Eranga Heshan commented on CLOUDSTACK-8629:

Hi [~widodh],

I am an undergraduate of Computer Science & Engineering, University of Moratuwa, Sri Lanka.

I have prior knowledge in working with networked VMs. However, I am new to Apache Cloudstack.
I am interested in this project and would like to know, how to begin with. Could you please
explain a little more about this project and guide me through it.

Thank you.

> Use Ceph RBD storage pool for writing HA heartbeats
> ---------------------------------------------------
>                 Key: CLOUDSTACK-8629
>                 URL:
>             Project: CloudStack
>          Issue Type: Improvement
>      Security Level: Public(Anyone can view this level - this is the default.) 
>          Components: KVM
>            Reporter: Wido den Hollander
>            Assignee: Wido den Hollander
>              Labels: gsoc2017
>             Fix For: Future
> Just like NFS we should write a heartbeat for each Instance to RADOS.
> Each hosts could write a simple object like: <pool>/<host ip>
> They simply write the timestamp to the object encoded in JSON.
> Other hosts can read that object and see if the host wrote the timestamp lately. If it
did it means that it is still up and running and Fencing is not needed or required.

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