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https://issues.apache.org/jira/browse/CLOUDSTACK-9252?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15116371#comment-15116371
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ASF GitHub Bot commented on CLOUDSTACK-9252:
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Github user serg38 commented on the pull request:
https://github.com/apache/cloudstack/pull/1361#issuecomment-174746870
I believe the main reason is to provide the most of backward compatibility.
image_store_details doesn't have NFS version in existing installations so after
the upgrade to this code it will continue working without any additional
changes. However if particular NFS secondary datastore requires explicit
version users simply populate table and restart SSVM.
> Support configurable NFS version for Secondary Storage mounts
> -------------------------------------------------------------
>
> Key: CLOUDSTACK-9252
> URL: https://issues.apache.org/jira/browse/CLOUDSTACK-9252
> Project: CloudStack
> Issue Type: Bug
> Security Level: Public(Anyone can view this level - this is the
> default.)
> Components: VMware
> Reporter: Nicolas Vazquez
>
> After starting secondary storage VM, secondary storage tries to be mounted
> but fails with error: {{Protocol family not supported}}
> It was found out that adding {{-o vers=X}} to mount command it would work,
> where {{X}} is the desired NFS version to use.
> If it is desired to mount a store with a specific NFS version, it has passed
> in {{image_store_details}} table for a store with id {{Y}} as a property:
> ||store_id||||name||value||
> |Y|nfs.version|X|
> Where X stands for NFS version
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