From 5d503b48cb414026c268069b273aef2ce6708b0f Mon Sep 17 00:00:00 2001
From: Steve Kamerman <stevekamerman@gmail.com>
Date: Thu, 19 Oct 2017 20:58:34 -0400
Subject: [PATCH] Added support for IPv6 DNS servers in resolver generation
 (issue #938)

---
 docker-entrypoint.sh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/docker-entrypoint.sh b/docker-entrypoint.sh
index 2afd5bf..7e7a312 100755
--- a/docker-entrypoint.sh
+++ b/docker-entrypoint.sh
@@ -18,8 +18,8 @@ fi
 # Note: if $DHPARAM_BITS is not defined, generate-dhparam.sh will use 2048 as a default
 /app/generate-dhparam.sh $DHPARAM_BITS
 
-# Compute the DNS resolvers for use in the templates
-export RESOLVERS=$(awk '$1 == "nameserver" {print $2}' ORS=' ' /etc/resolv.conf | sed 's/ *$//g')
+# Compute the DNS resolvers for use in the templates - if the IP contains ":", it's IPv6 and must be enclosed in []
+export RESOLVERS=$(awk '$1 == "nameserver" {print ($2 ~ ":")? "["$2"]": $2}' ORS=' ' /etc/resolv.conf | sed 's/ *$//g')
 if [ "x$RESOLVERS" = "x" ]; then
     echo "Warning: unable to determine DNS resolvers for nginx" >&2
     unset RESOLVERS