diff --git a/common/ubuntu_base.sh b/common/ubuntu_base.sh
index bca322d..6f314e9 100644
--- a/common/ubuntu_base.sh
+++ b/common/ubuntu_base.sh
@@ -62,5 +62,10 @@
 # Setup cloud-init
 apt-get -y install cloud-init
 
-# Disable apt-daily
-systemctl disable apt-daily.timer
+# FIXME: move to cluster model
+# Disable services
+disable_services="apt-daily.timer apt-daily-upgrade.timer lxc.service snapd.service snapd.socket"
+for s in ${disable_services}; do
+  systemctl disable ${s} || true
+  systemctl stop ${s} || true
+done
diff --git a/common/zerodisk.sh b/common/zerodisk.sh
new file mode 100644
index 0000000..9b20b18
--- /dev/null
+++ b/common/zerodisk.sh
@@ -0,0 +1,4 @@
+dd if=/dev/zero of=/EMPTY bs=1M || true
+rm -f /EMPTY
+echo 3 > /proc/sys/vm/drop_caches
+sync