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https://issues.apache.org/jira/browse/CLOUDSTACK-9395?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15571517#comment-15571517
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ASF subversion and git services commented on CLOUDSTACK-9395:
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Commit 0beb41b6e7d5177a64ac12d86d31c0766dc58d03 in cloudstack's branch
refs/heads/master from [~widodh]
[ https://git-wip-us.apache.org/repos/asf?p=cloudstack.git;h=0beb41b ]
CLOUDSTACK-9395: Add Virtio RNG device to Instances when configured
By adding a Random Number Generator device to Instances we can prevent
entropy starvation inside guest.
The default source is /dev/random on the host, but this can be configured
to another source when present, for example a hardware RNG.
When enabled it will add the following to the Instance's XML definition:
<rng model='virtio'>
<rate period='1000' bytes='2048' />
<backend model='random'>/dev/random</backend>
</rng>
If the Instance has the proper support, which most modern distributions have,
it will have a /dev/hwrng device which it can use for gathering entropy.
More information: https://libvirt.org/formatdomain.html#elementsRng
> Add VirtIO Random Number Geneator to KVM Instances
> --------------------------------------------------
>
> Key: CLOUDSTACK-9395
> URL: https://issues.apache.org/jira/browse/CLOUDSTACK-9395
> Project: CloudStack
> Issue Type: New Feature
> Security Level: Public(Anyone can view this level - this is the
> default.)
> Components: KVM
> Reporter: Wido den Hollander
> Assignee: Wido den Hollander
> Labels: kvm, libvirt, virtio
> Fix For: Future
>
>
> Add a VirtIO Random Number Generator (RNG) to all Instances to prevent
> entropy starvation in guests.
> More information:
> - https://libvirt.org/formatdomain.html
> - https://fedoraproject.org/wiki/Features/Virtio_RNG
> In the end this make sure the Entropy performance in Instances is better
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