From 444d6be6c98d52903a9fd10a1011ff0cf00015e1 Mon Sep 17 00:00:00 2001
From: Bryan Boreham <bjboreham@gmail.com>
Date: Fri, 16 Jun 2017 13:21:07 +0000
Subject: [PATCH] Document the requirement for 'nsenter'

---
 site/cni-plugin.md | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/site/cni-plugin.md b/site/cni-plugin.md
index a3d114a3..2e5b3efd 100644
--- a/site/cni-plugin.md
+++ b/site/cni-plugin.md
@@ -108,5 +108,8 @@ For more information, see the
 
 ### Caveats
 
+- The program `nsenter` must be present on the host; it is required by
+  the CNI plugin.  In some distros (e.g. Alpine, Ubuntu) it is in the
+  util-linux package
 - The Weave Net router container must be running for CNI to allocate addresses
 - The CNI plugin does not add entries to weaveDNS.