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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CLOUDSTACK-9025) Unable to deploy VM instance from template if template spin from linked clone snapshot
Date Wed, 15 Nov 2017 10:57:00 GMT

    [ https://issues.apache.org/jira/browse/CLOUDSTACK-9025?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16253278#comment-16253278
] 

ASF GitHub Bot commented on CLOUDSTACK-9025:
--------------------------------------------

anshul1886 commented on a change in pull request #2315: A comprehensive solution for #CLOUDSTACK-9025.
URL: https://github.com/apache/cloudstack/pull/2315#discussion_r151093908
 
 

 ##########
 File path: engine/schema/src/com/cloud/host/dao/HostDao.java
 ##########
 @@ -103,4 +95,13 @@
     List<HostVO> listByType(Type type);
 
     HostVO findByIp(String ip);
+
+    /**
+     * This method will look for a host that is connected to the storage pool where the volume
of the Snapshot is stored.
+     * <ul>
+     * <li>If the storage pool found for the volume of the snapshotId has more than
a host, we will choose one randomly;
+     * <li>If no host is found, we throw a runtime exception
+     * </ul>
+     */
+    HostVO findHostToOperateOnSnapshot(long snapshotId);
 
 Review comment:
   For unmanaged storage snapshots goes on secondary storage. Secondary storage is accessible
to all hosts in zone. So any random host in a zone will do. Once the snapshot is created for
unmanaged storage it's independent of volume and storage pool. I believe managed store is
zone wide so it is available to all and any random host in zone. Also it's handling is bit
different. Confirm behaviour with @mike-tutkowski.

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> Unable to deploy VM instance from template if template spin from linked clone snapshot
> --------------------------------------------------------------------------------------
>
>                 Key: CLOUDSTACK-9025
>                 URL: https://issues.apache.org/jira/browse/CLOUDSTACK-9025
>             Project: CloudStack
>          Issue Type: Bug
>      Security Level: Public(Anyone can view this level - this is the default.) 
>          Components: XenServer
>    Affects Versions: 4.5.2
>         Environment: XenServer 6.5
>            Reporter: Anshul Gangwar
>            Assignee: Anshul Gangwar
>            Priority: Critical
>             Fix For: 4.6.0
>
>
> As default, CloudStack create linked clone snapshot for VM instance . When we take a
snapshot for the VM, and create a template based on such snapshot, CloudStack only download
incremental VHD as template file, as a result, the VM instance fail to deploy as it is incomplete.



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