From 1c68029ce903b6500ac267e95fcb912eb9b8622e Mon Sep 17 00:00:00 2001
From: Seb Patane <sebbity@gmail.com>
Date: Thu, 7 Mar 2019 20:15:42 +1100
Subject: [PATCH] Normalize a blank string to 0.0.0.0 (#128)

Works around a problem in Windows on Docker, which doesn't support providing an IP to to bind to for ports
---
 docker/resource_docker_container.go | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/docker/resource_docker_container.go b/docker/resource_docker_container.go
index 622238a9..37a316bf 100644
--- a/docker/resource_docker_container.go
+++ b/docker/resource_docker_container.go
@@ -253,6 +253,14 @@ func resourceDockerContainer() *schema.Resource {
 							Default:  "0.0.0.0",
 							Optional: true,
 							ForceNew: true,
+							StateFunc: func(val interface{}) string {
+								// Empty IP assignments default to 0.0.0.0
+								if val.(string) == "" {
+									return "0.0.0.0"
+								}
+
+								return val.(string)
+							},
 						},
 
 						"protocol": &schema.Schema{