From fc7a6fb20abe41ccd40f3449ee8ee7bba7bd9932 Mon Sep 17 00:00:00 2001
From: Dalton Hubble <dghubble@gmail.com>
Date: Mon, 6 May 2019 21:23:08 -0700
Subject: [PATCH] Change flannel port from 8472 to 4789

* Change flannel port from the kernel default 8472 to the
IANA assigned VXLAN port 4789
* Requires a change to firewall rules or security groups
depending on the platform (**action required!**)
* Why now? Calico now offers its own VXLAN backend so
standardizing on the IANA port simplifies configuration
* https://github.com/coreos/flannel/blob/master/Documentation/backends.md#vxlan
---
 resources/flannel/config.yaml | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/resources/flannel/config.yaml b/resources/flannel/config.yaml
index 7179036..d14991b 100644
--- a/resources/flannel/config.yaml
+++ b/resources/flannel/config.yaml
@@ -31,6 +31,7 @@ data:
     {
       "Network": "${pod_cidr}",
       "Backend": {
-        "Type": "vxlan"
+        "Type": "vxlan",
+        "Port": 4789
       }
     }