feat: suttyns

Dockerfile

@@ -3,9 +3,11 @@ ARG BASE_IMAGE=gitea.nulo.in/sutty/monit
 FROM ${BASE_IMAGE}:${ALPINE_VERSION}
 MAINTAINER "f <f@sutty.nl>"
 ARG KNOT_VERSION=3.1.8
+ENV SUTTYNS_FLAGS
 
-RUN apk add --no-cache knot~${KNOT_VERSION}
+RUN apk add --no-cache knot~${KNOT_VERSION} suttyns
 COPY ./monit.conf /etc/monit.d/knot.conf
+COPY ./suttynsd.sh /usr/local/bin/suttynsd
 
 EXPOSE 53
 EXPOSE 53/udp

monit.conf

@@ -4,3 +4,10 @@ check process knot with pidfile /tmp/knot.pid
   if 5 restarts within 8 cycles then alert
   if failed port 53 type udp protocol dns for 3 times within 5 cycles then restart
   if failed port 53 type tcp protocol dns for 3 times within 5 cycles then restart
+
+check process suttyns with pidfile /tmp/suttyns.pid
+  start program = "/usr/local/bin/suttynsd start"
+  stop  program = "/usr/local/bin/suttynsd stop"
+  if 5 restarts within 8 cycles then alert
+  if failed port 53535 type udp protocol dns for 3 times within 5 cycles then restart
+  if failed port 53535 type tcp protocol dns for 3 times within 5 cycles then restart

suttynsd.sh

@@ -0,0 +1,18 @@
+#!/bin/sh
+
+pid=/tmp/suttyns.pid
+
+case $1 in
+  start)
+    test -f $pid && exit 0
+
+    daemonize -p $pid -u nobody /usr/local/bin/syslogize /usr/bin/suttyns $SUTTYNS_FLAGS
+    ;;
+  stop)
+    test -f $pid || exit 0
+
+    cat $pid | xargs kill
+    rm $pid
+
+    ;;
+esac