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Date: Wed, 18 Jan 2017 16:25:26 +0000 (UTC)
From: "rashmidixit (JIRA)" <jira@apache.org>
To: cloudstack-issues@incubator.apache.org
Message-ID: <JIRA.13011793.1476304705000.42359.1484756726878@Atlassian.JIRA>
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Subject: [jira] [Commented] (CLOUDSTACK-9539) Support changing Service
 offering for instance with VM Snapshots
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archived-at: Wed, 18 Jan 2017 16:25:33 -0000


    [ https://issues.apache.org/jira/browse/CLOUDSTACK-9539?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15828355#comment-15828355 ] 

rashmidixit commented on CLOUDSTACK-9539:
-----------------------------------------

Github user nvazquez commented on the issue:

    https://github.com/apache/cloudstack/pull/1727
  
    @serg38 done, I reverted DB changes to `schema-490to4910.sql`, thanks!
    @koushik-das thanks for reviewing! I refactored PR according to your review


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> Support changing Service offering for instance with VM Snapshots
> ----------------------------------------------------------------
>
>                 Key: CLOUDSTACK-9539
>                 URL: https://issues.apache.org/jira/browse/CLOUDSTACK-9539
>             Project: CloudStack
>          Issue Type: Bug
>      Security Level: Public(Anyone can view this level - this is the default.) 
>            Reporter: Nicolas Vazquez
>            Assignee: Nicolas Vazquez
>
> h3. Actual behaviour
> CloudStack doesn't support changing service offering for vm instances which have vm snapshots, they should be removed before changing service offering.
> h3. Goal
> Extend actual behaviour by supporting changing service offering for vms which have vm snapshots. In that case, previously taken snapshots (if reverted) should use previous service offering, future snapshots should use the newest.
> h3. Proposed solution:
> 1. Adding {{service_offering_id}} column on {{vm_snapshots}} table: This way snapshot can be reverted to original state even though service offering can be changed for vm instance.
> NOTE: Existing vm snapshots are populated on update script by {{UPDATE vm_snapshots s JOIN vm_instance v ON v.id = s.vm_id SET s.service_offering_id = v.service_offering_id;}}
> 2. New vm snapshots will use instance vm service offering id as {{service_offering_id}}
> 3. Revert to vm snapshots should use vm snapshot's {{service_offering_id}} value.
> h3. Example use case:
> - Deploy vm using service offering A
> - Take vm snapshot -> snap1 (service offering A)
> - Stop vm
> - Change vm service offering to B
> - Revert to VM snapshot snap 1
> - Start vm
> It is expected that vm has service offering A after last step


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