Added new BIND_LOG environment variable. By default you still have -g, however you can now override directly with -f for foreground logging. The README also has a detailed section on logging practices. I've also updated the binary version to the latest Alpine image v3.11.3

container/Dockerfile

@@ -3,6 +3,11 @@ EXPOSE 53 53/udp
 
 RUN apk --update upgrade && apk add bind bind-tools bind-plugins
 
+# BIND Log Options - you can override at run time
+# "-g" = (default) Run the server in the foreground and force all logging stderr.
+# "-f" = Run the server in the foreground
+env BIND_LOG -g
+
 # /etc/bind needs to be owned by root, group owned by "bind", and chmod 750
 # since we are mounting, do it manually
 # NOTE: Per Dockerfile manual --> need to mkdir the mounted dir to chown

container/entrypoint.sh

@@ -4,5 +4,6 @@ chown -R root:named /etc/bind /var/run/named
 chown -R named:named /var/cache/bind
 chmod -R 770 /var/cache/bind /var/run/named
 chmod -R 750 /etc/bind
-# Run in foreground and log to STDERR (console):
-exec /usr/sbin/named -c /etc/bind/named.conf -g -u named $OPTIONS
+# By default - run in foreground and log to STDERR (console)
+# can be changed by running container with: -e "BIND_LOG=-f"
+exec /usr/sbin/named -c /etc/bind/named.conf $BIND_LOG -u named $OPTIONS