rhel: Ensure proper OVS kernel modules load after upgrade

Add post install and post un-install scripts to make sure that the
openvswitch kernel modules are correctly written with the weak-modules
utility. This ensures that after an upgrade to a newer kernel the
correct openvswitch kernel modules from a previous installation will
be found by the depmod search path.

Suggested-by: Flavio Leitner <fbl@sysclose.org>
Signed-off-by: Greg Rose <gvrose8192@gmail.com>
Acked-by: Ansis Atteka <aatteka@ovn.org>
Acked-by: Flavio Leitner <fbl@sysclose.org>

rhel/openvswitch-kmod-fedora.spec.in

@@ -57,7 +57,28 @@ rm -rf $RPM_BUILD_ROOT
 
 %post
 # Ensure that modprobe will find our modules.
-depmod %{kernel}
+for k in $(cd /lib/modules && /bin/ls); do
+    [ -d "/lib/modules/$k/kernel/" ] && depmod -a "$k"
+done
+if [ -x "/sbin/weak-modules" ]; then
+    for m in openvswitch vport-gre vport-stt vport-geneve \
+             vport-lisp vport-vxlan; do
+        echo "/lib/modules/%{kernel}/extra/$m.ko"
+    done | /sbin/weak-modules --add-modules
+fi
+
+%postun
+for k in $(cd /lib/modules && /bin/ls); do
+    [ -d "/lib/modules/$k/kernel/" ] && depmod -a "$k"
+done
+if [ "$1" = 0 ]; then  # Erase, not upgrade
+    if [ -x "/sbin/weak-modules" ]; then
+        for m in openvswitch vport-gre vport-stt vport-geneve \
+                 vport-lisp vport-vxlan; do
+        echo "/lib/modules/%{kernel}/extra/$m.ko"
+    done | /sbin/weak-modules --remove-modules
+    fi
+fi
 
 %files
 %defattr(0644,root,root)