Add patches to modify log to warning level

Dockerfile

@@ -5,7 +5,7 @@ MAINTAINER Leo Unbekandt <leo@scalingo.com>
 RUN adduser --system --home /var/lib/munin --shell /bin/false --uid 1103 --group munin
 
 RUN apt-get update -qq && RUNLEVEL=1 DEBIAN_FRONTEND=noninteractive \
-    apt-get install -y -qq cron munin munin-node nginx apache2-utils wget heirloom-mailx
+    apt-get install -y -qq cron munin munin-node nginx apache2-utils wget heirloom-mailx patch
 RUN rm /etc/nginx/sites-enabled/default && mkdir -p /var/cache/munin/www && chown munin:munin /var/cache/munin/www && mkdir -p /var/run/munin && chown -R munin:munin /var/run/munin
 
 VOLUME /var/lib/munin
@@ -14,6 +14,10 @@ VOLUME /var/log/munin
 ADD ./munin.conf /etc/munin/munin.conf
 ADD ./nginx-munin /etc/nginx/sites-enabled/munin
 ADD ./start-munin.sh /munin
+ADD ./munin-graph-logging.patch /usr/share/munin
+ADD ./munin-update-logging.patch /usr/share/munin
+
+RUN cd /usr/share/munin && patch munin-graph < munin-graph-logging.patch && patch munin-update < munin-update-logging.patch
 
 EXPOSE 8080
 CMD bash /munin

munin-graph-logging.patch

@@ -0,0 +1,10 @@
+--- /usr/share/munin/munin-graph	2015-11-28 00:45:25.274878597 +0100
++++ /usr/share/munin/munin-graph	2015-11-28 00:45:44.622466044 +0100
+@@ -73,6 +73,7 @@
+ 
+ logger_open($config->{'logdir'});
+ logger_debug() if $config->{debug} or defined($ENV{CGI_DEBUG});
++logger_level("warn");
+ 
+ if (! graph_check_cron() ) {
+ 	# Should not be launched from cron.

munin-update-logging.patch

@@ -0,0 +1,10 @@
+--- /usr/share/munin/munin-update	2015-11-28 00:44:27.175435050 +0100
++++ /usr/share/munin/munin-update	2015-11-28 00:44:57.313544402 +0100
+@@ -34,6 +34,7 @@
+ 
+     logger_open($config->{'logdir'});
+     logger_debug() if $config->{debug};
++    logger_level("warn");
+ 
+     my $update = Munin::Master::Update->new();
+     $update->run();