luci-app-statistics: add initial support for collectd-mod-openvpn

This changeset covers compression and traffic stats, not every combination has
been tested yet.

Signed-off-by: Jo-Philipp Wich <jow@openwrt.org>

applications/luci-app-statistics/luasrc/controller/luci_statistics/luci_statistics.lua

@@ -42,6 +42,7 @@ function index()
 		network		= _("Network"),
 		nut			= _("UPS"),
 		olsrd		= _("OLSRd"),
+		openvpn		= _("OpenVPN"),
 		ping		= _("Ping"),
 		processes	= _("Processes"),
 		rrdtool		= _("RRDTool"),
@@ -56,7 +57,7 @@ function index()
 	local collectd_menu = {
 		output  = { "csv", "network", "rrdtool", "unixsock" },
 		general = { "cpu", "df", "disk", "email", "entropy", "exec", "irq", "load", "memory", "nut", "processes", "sensors", "uptime" },
-		network = { "conntrack", "dns", "interface", "iptables", "netlink", "olsrd", "ping", "splash_leases", "tcpconns", "iwinfo" }
+		network = { "conntrack", "dns", "interface", "iptables", "netlink", "olsrd", "openvpn", "ping", "splash_leases", "tcpconns", "iwinfo" }
 	}
 
 	-- create toplevel menu nodes

applications/luci-app-statistics/luasrc/model/cbi/luci_statistics/openvpn.lua

@@ -0,0 +1,56 @@
+-- Copyright 2015 Jo-Philipp Wich <jow@openwrt.org>
+-- Licensed to the public under the Apache License 2.0.
+
+require "luci.sys"
+
+local m, s, o
+
+
+m = Map("luci_statistics",
+	translate("OpenVPN Plugin Configuration"),
+	translate("The OpenVPN plugin gathers information about the current vpn connection status."))
+
+s = m:section( NamedSection, "collectd_openvpn", "luci_statistics" )
+
+
+o = s:option( Flag, "enable", translate("Enable this plugin") )
+o.default = "0"
+
+
+o = s:option(Flag, "CollectIndividualUsers", translate("Generate a separate graph for each logged user"))
+o.default = "0"
+o.rmempty = true
+o:depends("enable", 1)
+
+
+o = s:option(Flag, "CollectUserCount", translate("Aggregate number of connected users"))
+o.default = "0"
+o.rmempty = true
+o:depends("enable", 1)
+
+
+o = s:option(Flag, "CollectCompression", translate("Gather compression statistics"))
+o.default = "0"
+o.rmempty = true
+o:depends("enable", 1)
+
+
+o = s:option(Flag, "ImprovedNamingSchema", translate("Use improved naming schema"))
+o.default = "0"
+o.rmempty = true
+o:depends("enable", 1)
+
+
+o = s:option(DynamicList, "StatusFile", translate("OpenVPN status files"))
+o.rmempty = true
+o:depends("enable", 1)
+
+local status_files = nixio.fs.glob("/var/run/openvpn.*.status")
+if status_files then
+	local status_file
+	for status_file in status_files do
+		o:value(status_file)
+	end
+end
+
+return m

applications/luci-app-statistics/luasrc/statistics/rrdtool/definitions/openvpn.lua

@@ -0,0 +1,48 @@
+-- Copyright 2015 Jo-Philipp Wich <jow@openwrt.org>
+-- Licensed to the public under the Apache License 2.0.
+
+module("luci.statistics.rrdtool.definitions.openvpn", package.seeall)
+
+function rrdargs( graph, plugin, plugin_instance )
+	local inst = plugin_instance:gsub("^openvpn%.(.+)%.status$", "%1")
+
+	return {
+		{
+			title = "%%H: OpenVPN \"%s\" - Traffic" % inst,
+			vlabel = "Bytes/s",
+			data = {
+				instances = {
+					if_octets = { "traffic", "overhead" }
+				},
+				sources = {
+					if_octets = { "tx", "rx" }
+				},
+				options = {
+					if_octets_traffic_tx  = { title = "Bytes    (TX)", total = true, color = "00ff00" },
+					if_octets_overhead_tx = { title = "Overhead (TX)", total = true, color = "ff9900" },
+					if_octets_traffic_rx  = { title = "Bytes    (RX)", total = true, flip = true, color = "0000ff" },
+					if_octets_overhead_rx = { title = "Overhead (RX)", total = true, flip = true, color = "ff00ff" }
+				}
+			}
+		},
+
+		{
+			title = "%%H: OpenVPN \"%s\" - Compression" % inst,
+			vlabel = "Bytes/s",
+			data = {
+				instances = {
+					compression = { "data_out", "data_in" }
+				},
+				sources = {
+					compression = { "uncompressed", "compressed" }
+				},
+				options = {
+					compression_data_out_compressed   = { title = "Compressed   (TX)", total = true, color = "008800" },
+					compression_data_out_uncompressed = { title = "Uncompressed (TX)", total = true, color = "00ff00" },
+					compression_data_in_compressed    = { title = "Compressed   (RX)", total = true, flip = true, color = "000088" },
+					compression_data_in_uncompressed  = { title = "Uncompressed (RX)", total = true, flip = true, color = "0000ff" }
+				}
+			}
+		}
+	}
+end

applications/luci-app-statistics/root/usr/bin/stat-genconfig

@@ -187,9 +187,9 @@ function _list_expand( c, l, nopad )
 			end
 
 			if n:find("(%w+)ses") then
-				k = n:gsub("(%w+)ses", "%1s")
+				k = n:gsub("(%w+)ses$", "%1s")
 			else
-				k = n:gsub("(%w+)s", "%1")
+				k = n:gsub("(%w+)s$", "%1")
 			end
 
 			str = str .. _expand( c[n], k, nopad )
@@ -375,6 +375,12 @@ plugins = {
 		{ }
 	},
 
+	openvpn = {
+		{ },
+		{ "CollectIndividualUsers", "CollectUserCount", "CollectCompression", "ImprovedNamingSchema" },
+		{ "StatusFile" }
+	},
+
 	ping	= {
 		{ "TTL", "Interval" },
 		{ },