From 06c3b7cd34fbc7b795993ea96b3367319462ad2a Mon Sep 17 00:00:00 2001
From: Misty Stanley-Jones <misty@apache.org>
Date: Fri, 13 Oct 2017 16:00:56 -0700
Subject: [PATCH] Add docs for attachable key in composefile (#4957)

---
 compose/compose-file/index.md | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/compose/compose-file/index.md b/compose/compose-file/index.md
index e8e144b9d3..f5168df291 100644
--- a/compose/compose-file/index.md
+++ b/compose/compose-file/index.md
@@ -1952,6 +1952,23 @@ documentation for more information. Optional.
         foo: "bar"
         baz: 1
 
+### attachable
+
+> **Note**: Only supported for v3.2 and higher.
+
+Only used when the `driver` is set to `overlay`. If set to `true`, then
+standalone containers can attach to this network, in addition to services. If a
+standalone container attaches to an overlay network, it can communicate with
+services and standalone containers which are also attached to the overlay
+network from other Docker daemons.
+
+```yaml
+networks:
+  mynet1:
+    driver: overlay
+    attachable: true
+```
+
 ### enable_ipv6
 
 Enable IPv6 networking on this network.