Plugin-Gallery: Better 2nd level headings

plugins/tcp/tcp-retransmissions

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+#!/bin/sh
+
+# tcp_retries revision 2 (Feb 2012)
+#
+# TCP retransmission rate. Useful for network debugging.
+#
+# Required privileges: none
+#
+# OS: Linux with procfs
+#
+# Author: Artem Sheremet <dot.doom@gmail.com>
+#
+
+#%# family=auto
+#%# capabilities=autoconf
+
+TCPSTAT=/proc/net/tcp
+
+case $1 in
+	autoconf)
+		[ -r $TCPSTAT -o -r ${TCPSTAT}6 ] && echo "yes" || echo "no"
+		;;
+    config)
+		cat <<CONFIG
+graph_title TCP retransmissions
+graph_vlabel Rate, retrs/sockets
+graph_category network
+graph_info TCP sockets retransmission counters from $TCPSTAT
+rate.label Retransmission rate
+rate.draw LINE2
+rate.min 0
+CONFIG
+		;;
+esac
+
+cat /proc/net/tcp* | awk '
+{
+	TOTAL += $7;
+	COUNT++;
+}
+
+END {
+	printf "rate.value %.3f\n", TOTAL/COUNT
+}
+'

plugins/tcp/tcp-states

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+#!/bin/sh
+#
+# Plugin to monitor TCP states.
+#
+# Parameters:
+#
+# 	config   (required)
+# 	autoconf (optional - only used by munin-config)
+#
+# (C) Marki - count number of connections in each state
+#           - no LISTEN as we are running netstat without the "-a" option
+#
+#
+# Magic markers (optional - used by munin-config and some installation
+# scripts):
+#%# family=auto
+#%# capabilities=autoconf
+
+
+
+if [ "$1" = "autoconf" ]; then
+	if ( netstat -nt 2>/dev/null >/dev/null ); then
+		echo yes
+		exit 0
+	else
+		if [ $? -eq 127 ]
+		then
+			echo "no (netstat program not found)"
+			exit 1
+		else
+			echo no
+			exit 1
+		fi
+	fi
+fi
+
+if [ "$1" = "config" ]; then
+
+	echo 'graph_title TCP Connection States'
+	echo 'graph_args -l 0 --base 1000'
+	echo 'graph_vlabel connections'
+	echo 'graph_category network'
+	echo 'graph_period second'
+	echo 'graph_info This graph shows the TCP connections states of all the network interfaces combined.'
+	for i in ESTABLISHED SYN_SENT SYN_RECV FIN_WAIT1 FIN_WAIT2 TIME_WAIT CLOSE CLOSE_WAIT LAST_ACK CLOSING; do
+	  echo "$i.label $i"
+	  echo "$i.type GAUGE"
+	  echo "$i.max 32999"
+	  echo "$i.min 0"
+	done
+	exit 0
+fi
+
+netstat -nt | awk '/^tcp/ { states[$6]++ } END { for (idx in states) print idx ".value " states[idx] }'