Fix for virt-install of Ubuntu 16.04 from Cobbler defaults to i386

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Hi

We are in the process of setting up Cobbler so we can use PXE boot on our corporate network. 
To test that everything works as expected I imported Ubuntu 16.04.2 Server amd64 and attempted to PXE boat using koan as per this guide:

https://help.ubuntu.com/community/Cobbler/Deployment

virt-install fails to startup due to an "hvm" error which I can see is due to virt-install defaulting to the i386 arch - this is similar to an issue that was fixed recently:
https://www.redhat.com/archives/virt-tools-list/2016-August/msg00009.html
https://github.com/virt-manager/virt-manager/commit/3f15a489cda87f8028828d567848193dd2640a43

However, I've noticed that the uri generated by Cobbler does not use amd64, it uses x86_64 instead. To get the PXE boot to work I needed to add x86_64 to the arch check. 

I've attached a patch showing the changes - there may be a better/cleaner way to handle this but this change did work for me in my environment. 

Kind Regards
Rowan


From 364e267a8f772600f5c6744293f0bc3c33ad083e Mon Sep 17 00:00:00 2001
From: Rowan Potgieter <rowan.potgieter@xxxxxxxxx>
Date: Tue, 4 Apr 2017 12:45:30 +0200
Subject: [PATCH] Add x86_64 check to urlfetcher to cater for Ubuntu 16.04

---
 virtinst/urlfetcher.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/virtinst/urlfetcher.py b/virtinst/urlfetcher.py
index 82b78fa..1ff5ab2 100644
--- a/virtinst/urlfetcher.py
+++ b/virtinst/urlfetcher.py
@@ -1102,9 +1102,11 @@ class DebianDistro(Distro):
 
         # Check for standard 'i386' and 'amd64' which will be
         # in the URI name for --location $ISO mounts
-        for arch in ["i386", "amd64"]:
+        for arch in ["i386", "amd64", "x86_64"]:
             if arch in self.uri:
                 logging.debug("Found treearch=%s in uri", arch)
+                if arch is "x86_64":
+                    arch = "amd64"
                 return arch
 
         # Otherwise default to i386
-- 
2.9.3

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