[lxc-devel] [PATCH] ubuntu: Tweak architecture support

[Stéphane Graber]

This updates the various checks to match the grid below:

== lxc-ubuntu support per architecture ==
amd64: amd64, i386, armel, armhf, powerpc
i386: i386, armel, armhf, powerpc
armel: armel, armhf
armhf: armhf, armel
powerpc: powerpc

== lxc-ubuntu-cloud support per architecture ==
amd64: amd64, i386
i386: i386
armel: armel, armhf
armhf: armhf, armel

Note that most of the foreign architectures on x86 are supported
through the use of qemu-user-static. This one however isn't yet
support for cloud images (I'll send a patch for 1.0).

Also, qemu-user-static is technically able to emulate amd64 on i386
but qemu-debootstrap doesn't appear to know that and fails quite miserably.

We may also want to add a test for amd64 kernel but i386 userspace, which
is a valid combination that allows running an amd64 container on an i386
host without requiring emulation, but that's for another patch.

Signed-off-by: Stéphane Graber <stgraber at ubuntu.com>
---
 templates/lxc-ubuntu-cloud.in | 26 +++++++++++++++++++++-----
 templates/lxc-ubuntu.in       | 15 +++++++++++++--
 2 files changed, 34 insertions(+), 7 deletions(-)

diff --git a/templates/lxc-ubuntu-cloud.in b/templates/lxc-ubuntu-cloud.in
index 9ee8fb1..8673e4c 100644
--- a/templates/lxc-ubuntu-cloud.in
+++ b/templates/lxc-ubuntu-cloud.in
@@ -166,7 +166,7 @@ else
         # precise and later;  and are not supported by the query, so we don't actually
         # support them yet (see check later on).  When Query2 is available,
         # we'll use that to enable arm images.
-        arch="armel"
+        arch="armhf"
     fi
 fi
 
@@ -206,13 +206,29 @@ if [ "$arch" == "i686" ]; then
     arch=i386
 fi
 
-if [ $hostarch = "i386" -a $arch = "amd64" ]; then
-    echo "can't create amd64 container on i386"
+if [ $arch != "i386" -a $arch != "amd64" -a $arch != "armhf" -a $arch != "armel" ]; then
+    echo "Only i386, amd64, armel and armhf are supported by the ubuntu cloud template."
     exit 1
 fi
 
-if [ $arch != "i386" -a $arch != "amd64" ]; then
-    echo "Only i386 and amd64 are supported by the ubuntu cloud template."
+if [ $hostarch != "i386" -a $hostarch != "amd64" -a $hostarch != "armhf" -a $hostarch != "armel" ]; then
+    echo "Only i386, amd64, armel and armhf are supported as host."
+    exit 1
+fi
+
+if [ $hostarch = "amd64" -a $arch != "amd64" -a $arch != "i386" ]; then
+    echo "can't create $arch container on $hostarch"
+    exit 1
+fi
+
+if [ $hostarch = "i386" -a $arch != "i386" ]; then
+    echo "can't create $arch container on $hostarch"
+    exit 1
+fi
+
+if [ $hostarch = "armhf" -o $hostarch = "armel" ] && \
+   [ $arch != "armhf" -a $arch != "armel" ]; then
+    echo "can't create $arch container on $hostarch"
     exit 1
 fi
 
diff --git a/templates/lxc-ubuntu.in b/templates/lxc-ubuntu.in
index 39c5a1c..f011633 100644
--- a/templates/lxc-ubuntu.in
+++ b/templates/lxc-ubuntu.in
@@ -617,7 +617,7 @@ else
     elif [ "$arch" = "x86_64" ]; then
         arch="amd64"
     elif [ "$arch" = "armv7l" ]; then
-        arch="armel"
+        arch="armhf"
     fi
 fi
 
@@ -661,7 +661,18 @@ if [ "$arch" == "i686" ]; then
 fi
 
 if [ $hostarch = "i386" -a $arch = "amd64" ]; then
-    echo "can't create amd64 container on i386"
+    echo "can't create $arch container on $hostarch"
+    exit 1
+fi
+
+if [ $hostarch = "armhf" -o $hostarch = "armel" ] && \
+   [ $arch != "armhf" -a $arch != "armel" ]; then
+    echo "can't create $arch container on $hostarch"
+    exit 1
+fi
+
+if [ $hostarch = "powerpc" -a $arch != "powerpc" ]; then
+    echo "can't create $arch container on $hostarch"
     exit 1
 fi
 
-- 
1.8.1.2