Improve comment re nova live_migration_tunnelled setting
Change-Id: Ie565cb16bb69f0eb98bcfabfb95f67c71f492bd1
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@ -186,8 +186,9 @@ outputs:
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nova::compute::instance_usage_audit: true
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nova::compute::instance_usage_audit_period: 'hour'
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nova::compute::rbd::ephemeral_storage: {get_param: NovaEnableRbdBackend}
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# TUNNELLED mode provides a security enhancement when using shared
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# storage but is not supported when not using shared storage.
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# TUNNELLED mode provides a security improvement for migration, but
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# can't be used in combination with block migration. So we only enable it
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# when shared storage is available (Ceph RDB is currently the only option).
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# See https://bugzilla.redhat.com/show_bug.cgi?id=1301986#c12
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# In future versions of QEMU (2.6, mostly), danpb's native
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# encryption work will obsolete the need to use TUNNELLED transport
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