add names for public interfaces, add apt-cacher-ng role
diff --git a/roles/apt-cacher-ng/defaults/main.yml b/roles/apt-cacher-ng/defaults/main.yml
new file mode 100644
index 0000000..f54e9cc
--- /dev/null
+++ b/roles/apt-cacher-ng/defaults/main.yml
@@ -0,0 +1,6 @@
+---
+# apt-cacher-ng/defaults/main.yml
+
+apt_cacher_ip: 127.0.0.1
+apt_cacher_port: 3142
+