From daab62bb3cb1ed538d41014526186475a22aefef Mon Sep 17 00:00:00 2001
From: Nadav Goldin <ngoldin@redhat.com>
Date: Tue, 20 Jun 2017 20:31:09 +0300
Subject: [PATCH] libvirt: use /dev/random on libvirt versions <= 2002001

It appears that on older libvirt versions(such as 1.3 on Ubuntu16.04),
/dev/urandom backend model is not supported. I could not trace in libvirt's
changelog when that was changed, and I hope this is not a different
issue specific to Ubuntu16.04.  However, we know for sure that /dev/urandom
works on libvirt version greater than 2002001. So here we add a simple
condition on that.

Signed-off-by: Nadav Goldin <ngoldin@redhat.com>
---
 lago/providers/libvirt/templates/dom_template-base.xml.j2 | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lago/providers/libvirt/templates/dom_template-base.xml.j2 b/lago/providers/libvirt/templates/dom_template-base.xml.j2
index 860d2027..cc896f8d 100644
--- a/lago/providers/libvirt/templates/dom_template-base.xml.j2
+++ b/lago/providers/libvirt/templates/dom_template-base.xml.j2
@@ -27,7 +27,7 @@
         <target type='virtio' name='org.qemu.guest_agent.0'/>
       </channel>
       <rng model='virtio'>
-        <backend model='random'>/dev/urandom</backend>
+        <backend model='random'>{{ '/dev/urandom' if libvirt_ver >= 2002001 else '/dev/random' }}</backend>
         <address type='pci' domain='0x0000' bus='0x00' slot='0x09' function='0x0'/>
       </rng>
       <console type='pty'>