From 6ecd14c7d0c8aebbfe69f24aa26b58ddd8e82dbc Mon Sep 17 00:00:00 2001
From: Alexandre <44178713+alexbelgium@users.noreply.github.com>
Date: Mon, 2 May 2022 20:34:56 +0200
Subject: [PATCH] test if DNS accessible

---
 .templates/90-dns_set.sh | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/.templates/90-dns_set.sh b/.templates/90-dns_set.sh
index b475ae818..b83d1bc5a 100644
--- a/.templates/90-dns_set.sh
+++ b/.templates/90-dns_set.sh
@@ -16,8 +16,13 @@ if bashio::config.has_value 'DNS_server'; then
     # Get DNS servers
     # shellcheck disable=SC2086
     for server in ${DNSSERVER//,/ }; do # Separate comma separated values
-        DNS="${DNS}nameserver $server\n"
-        DNSLIST="$server $DNSLIST"
+        if ping -c 1 "$server" &> /dev/null
+        then
+            DNS="${DNS}nameserver $server\n"
+            DNSLIST="$server $DNSLIST"
+        else
+          bashio::log.warning "DNS $server was requested but can't be pinged. It won't be used"
+        fi
     done
 
     # Write resolv.conf