diff --git a/gluon/gluon-announce/files/lib/gluon/announce/statistics.d/rootfs_usage b/gluon/gluon-announce/files/lib/gluon/announce/statistics.d/rootfs_usage
new file mode 100644
index 0000000..8426e9e
--- /dev/null
+++ b/gluon/gluon-announce/files/lib/gluon/announce/statistics.d/rootfs_usage
@@ -0,0 +1,4 @@
+local fs = require "nixio.fs"
+
+local st = fs.statvfs("/")
+return 1 - st.bfree / st.blocks