image: Increase memory available for guests

Recently, jobs keeped failling because libvirt failed to create a new guest.
The error message was:
can't allocate low memory for domain: Out of memory

diff --git a/nodepool/scripts/prepare_node_devstack_xen.sh b/nodepool/scripts/prepare_node_devstack_xen.sh
old mode 100644 (file)
new mode 100755 (executable)
index 660de05..0e05b75
--- a/nodepool/scripts/prepare_node_devstack_xen.sh
+++ b/nodepool/scripts/prepare_node_devstack_xen.sh
@@ -20,7 +20,7 @@ EOC
 sudo mv /etc/default/grub.d/xen.cfg{,.bak}
 sudo tee /etc/default/grub.d/xen.cfg << EOC
 echo "Including Xen overrides from /etc/default/grub.d/xen.cfg"
-GRUB_CMDLINE_XEN="dom0_mem=7680M,max:7680M dom0_max_vcpus=4 max-console=vga"
+GRUB_CMDLINE_XEN="dom0_mem=7552M,max:7552M dom0_max_vcpus=4 max-console=vga"
 GRUB_DEFAULT="Ubuntu GNU/Linux, with Xen hypervisor"
 EOC