use ext4 for guest default ephemeral
this isn't upstream default because of compatibility questions
with really old host on providers. However there is no reason not
to do it in devstack.
Change-Id: I6438c0efb297cfa5d3dbb5f00701b24f01c39d14
diff --git a/lib/nova_plugins/hypervisor-libvirt b/lib/nova_plugins/hypervisor-libvirt
index 6f90f4a..42d3af1 100644
--- a/lib/nova_plugins/hypervisor-libvirt
+++ b/lib/nova_plugins/hypervisor-libvirt
@@ -108,6 +108,7 @@
iniset $NOVA_CONF DEFAULT libvirt_type "$LIBVIRT_TYPE"
iniset $NOVA_CONF DEFAULT libvirt_cpu_mode "none"
iniset $NOVA_CONF DEFAULT use_usb_tablet "False"
+ iniset $NOVA_CONF DEFAULT default_ephemeral_format "ext4"
iniset $NOVA_CONF DEFAULT compute_driver "libvirt.LibvirtDriver"
LIBVIRT_FIREWALL_DRIVER=${LIBVIRT_FIREWALL_DRIVER:-"nova.virt.libvirt.firewall.IptablesFirewallDriver"}
iniset $NOVA_CONF DEFAULT firewall_driver "$LIBVIRT_FIREWALL_DRIVER"