collectd - improvements/additions

* enable unix socket for nagios monitoring
 * Add data collection for unbound

monitoring/collectd/scripts/unbound-collectd/README.md

@@ -0,0 +1,7 @@
+# unbound-collectd.sh
+Simple script to monitor unbound
+
+# Prerequisites
+ * Unbound
+ * `/etc/unbound/*.key` and `/etc/unbound/*.pem` should have group unbound
+ * exec section should execute the script with user unbound

monitoring/collectd/scripts/unbound-collectd/unbound-collectd.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+#
+# simple script to monitor unbound
+# All metrics are gauges
+
+HOSTNAME="${COLLECTD_HOSTNAME:-eric}"
+INTERVAL="${COLLECTD_INTERVAL:-10}"
+
+while sleep "$INTERVAL"; do
+        /usr/sbin/unbound-control stats | while read line;do
+                INSTANCE=`echo $line | cut -d= -f1 | cut -d. -f1`
+                STAT=`echo $line | cut -d= -f1 | cut -d. -f2- \
+                        | sed 's/\./-/g' | sed 's/recursion-time-/recursion-time_/g' \
+                        | sed 's/now/time-now/g' | sed 's/up/time-up/g' \
+                        | sed 's/elapsed/time-elapsed/g' `
+                VALUE=`echo $line | cut -d= -f2`
+
+                echo "PUTVAL \"$HOSTNAME/unbound-${INSTANCE}/$STAT\" interval=$INTERVAL N:$VALUE"
+        done
+done

monitoring/collectd/server/collectd.conf

@@ -223,6 +223,20 @@ LoadPlugin snmp
 	</Host>
 </Plugin>
 
+# monitor unbound by exec
+LoadPlugin exec
+<Plugin exec>
+	Exec "unbound" "/usr/local/bin/unbound-collectd.sh"
+</Plugin>
+
+# See collectd.conf(5)
+LoadPlugin unixsock
+<Plugin unixsock>
+	SocketFile "/tmp/collectd.sock"
+	SocketGroup "nagios"
+	SocketPerms "0770"
+</Plugin>
+
 # and finaly save the data in graphite
 LoadPlugin write_graphite
 <Plugin write_graphite>