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From "Michal Fojtik (JIRA)" <>
Subject [jira] [Commented] (DTACLOUD-557) Update EC2 Driver to support EBS backed instances
Date Fri, 26 Apr 2013 14:16:16 GMT


Michal Fojtik commented on DTACLOUD-557:

There are some related JIRA's and threads on mailing list on this. In general, I think it
would be easy to add support for EBS,
just by modifying the ec2_driver state machine and adding stop/start methods there. Everything
else will be done my Rabbit

On the other hand, this approach does not work for the non-ebs based instances, where calling
'stop' operation means that the
instance cannot be started again.
I'm not sure how to advertise this difference, without having two state machines. Possible

* Create a new driver that inherits from EC2 driver but have different state machine and implements
missing methods.
* Make the EC2 driver support only EBS state machine and then don't advertise the 'start'
operation when the image is 'ebs' (we already
advertise the image type in image referenced from instance)
* Add second state machine to Ec2 driver and make instance resource point to the right state
machine (link :href => /instance_states/ebs)

I personally like option 2) which also can be advertised as a 'feature'.

> Update EC2 Driver to support EBS backed instances
> -------------------------------------------------
>                 Key: DTACLOUD-557
>                 URL:
>             Project: DeltaCloud
>          Issue Type: New Feature
>            Reporter: David Ellinger
>              Labels: features
>   Original Estimate: 6h
>  Remaining Estimate: 6h
> Currently the deltacloud implementation does not support EBS backed instances -- and
due to this "Start" / "Stop" are currently not implemented. 

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