diff --git a/_constraints b/_constraints
new file mode 100644
index 0000000..03d1b24
--- /dev/null
+++ b/_constraints
@@ -0,0 +1,10 @@
+<constraints>
+  <hardware>
+    <physicalmemory>
+      <size unit="M">4096</size>
+    </physicalmemory>
+    <disk>
+      <size unit="G">20</size>
+    </disk>
+  </hardware>
+</constraints>