conntrack plugin: Add plugin to collect the connection tracking table size.

Hello,

I've adapted entropy plugin to get nf_conntrack entries, which is
important on Linux routers. Attached patch.

BTW you may want to take a look at PLD Linux spec file at
http://cvs.pld-linux.org/cgi-bin/cvsweb/SPECS/collectd.spec or
http://cvs.pld-linux.org/cgi-bin/cvsweb.cgi/SPECS/collectd.spec
as it's much more complex than Fedora, RH or SLES ones which are shipped
in contrib.

--
Tomasz Pala <gotar@pld-linux.org>

diff --git a/AUTHORS b/AUTHORS
index ff879c4..2c8c94b 100644 (file)
--- a/AUTHORS
+++ b/AUTHORS
@@ -119,6 +119,9 @@ Sjoerd van der Berg <harekiet at gmail.com>
 Stefan Hacker <stefan.hacker at web.de>
  - teamspeak2 plugin.
 
+Tomasz Pala <gotar at pld-linux.org>
+ - conntrack plugin.
+
 Tommie Gannert <d00-tga at d.kth.se>
  - PID-file patch.
 

diff --git a/README b/README
index c556c75..755704d 100644 (file)
--- a/README
+++ b/README
@@ -40,6 +40,9 @@ Features
       Name server and resolver statistics from the `statistics-channel'
       interface of BIND 9.5, 9,6 and later.
 
+    - conntrack
+      Number of nf_conntrack entries.
+
     - cpu
       CPU utilization: Time spent in the system, user, nice, idle, and related
       states.

diff --git a/configure.in b/configure.in
index f0c4312..591de4f 100644 (file)
--- a/configure.in
+++ b/configure.in
@@ -3152,6 +3152,7 @@ dependency_error="no"
 plugin_ascent="no"
 plugin_battery="no"
 plugin_bind="no"
+plugin_conntrack="no"
 plugin_cpu="no"
 plugin_cpufreq="no"
 plugin_df="no"
@@ -3185,6 +3186,7 @@ plugin_wireless="no"
 if test "x$ac_system" = "xLinux"
 then
        plugin_battery="yes"
+       plugin_conntrack="yes"
        plugin_cpu="yes"
        plugin_cpufreq="yes"
        plugin_disk="yes"
@@ -3367,6 +3369,7 @@ AC_PLUGIN([apple_sensors], [$with_libiokit],   [Apple's hardware sensors])
 AC_PLUGIN([ascent],      [$plugin_ascent],     [AscentEmu player statistics])
 AC_PLUGIN([battery],     [$plugin_battery],    [Battery statistics])
 AC_PLUGIN([bind],        [$plugin_bind],       [ISC Bind nameserver statistics])
+AC_PLUGIN([conntrack],   [$plugin_conntrack],  [nf_conntrack statistics])
 AC_PLUGIN([cpufreq],     [$plugin_cpufreq],    [CPU frequency statistics])
 AC_PLUGIN([cpu],         [$plugin_cpu],        [CPU usage statistics])
 AC_PLUGIN([csv],         [yes],                [CSV output plugin])
@@ -3648,6 +3651,7 @@ Configuration:
     ascent  . . . . . . . $enable_ascent
     battery . . . . . . . $enable_battery
     bind  . . . . . . . . $enable_bind
+    conntrack . . . . . . $enable_conntrack
     cpu . . . . . . . . . $enable_cpu
     cpufreq . . . . . . . $enable_cpufreq
     csv . . . . . . . . . $enable_csv

diff --git a/contrib/collection.cgi b/contrib/collection.cgi
index d3a284f..eeda241 100755 (executable)
--- a/contrib/collection.cgi
+++ b/contrib/collection.cgi
@@ -1301,6 +1301,18 @@ sub load_graph_definitions
     'GPRINT:max:MAX:%4.1lf Max,',
     'GPRINT:avg:LAST:%4.1lf Last\l'
     ],
+    conntrack => ['-v', 'Entries',
+    'DEF:avg={file}:entropy:AVERAGE',
+    'DEF:min={file}:entropy:MIN',
+    'DEF:max={file}:entropy:MAX',
+    "AREA:max#$HalfBlue",
+    "AREA:min#$Canvas",
+    "LINE1:avg#$FullBlue:Count",
+    'GPRINT:min:MIN:%4.0lf Min,',
+    'GPRINT:avg:AVERAGE:%4.0lf Avg,',
+    'GPRINT:max:MAX:%4.0lf Max,',
+    'GPRINT:avg:LAST:%4.0lf Last\l'
+    ],
     entropy => ['-v', 'Bits',
     'DEF:avg={file}:entropy:AVERAGE',
     'DEF:min={file}:entropy:MIN',

diff --git a/contrib/collection3/etc/collection.conf b/contrib/collection3/etc/collection.conf
index 2511221..492bfa2 100644 (file)
--- a/contrib/collection3/etc/collection.conf
+++ b/contrib/collection3/etc/collection.conf
@@ -131,6 +131,13 @@ GraphWidth 400
   RRDVerticalLabel "Queries/s"
   RRDFormat "%6.1lf"
 </Type>
+<Type conntrack>
+  DataSources conntrack
+  DSName conntrack Conntrack count
+  RRDTitle "nf_conntrack connections on {hostname}"
+  RRDVerticalLabel "Count"
+  RRDFormat "%4.0lf"
+</Type>
 <Type entropy>
   DataSources entropy
   DSName entropy Entropy bits

diff --git a/contrib/fedora/collectd.spec b/contrib/fedora/collectd.spec
index 35eb8be..a35923c 100644 (file)
--- a/contrib/fedora/collectd.spec
+++ b/contrib/fedora/collectd.spec
@@ -119,6 +119,9 @@ exit 0
 %attr(0644,root,root) %{_libdir}/%{name}/battery.so*
 %attr(0644,root,root) %{_libdir}/%{name}/battery.la
 
+%attr(0644,root,root) %{_libdir}/%{name}/conntrack.so*
+%attr(0644,root,root) %{_libdir}/%{name}/conntrack.la
+
 %attr(0644,root,root) %{_libdir}/%{name}/cpufreq.so*
 %attr(0644,root,root) %{_libdir}/%{name}/cpufreq.la
 

diff --git a/contrib/php-collection/definitions.php b/contrib/php-collection/definitions.php
index cb3e803..a0f3818 100644 (file)
--- a/contrib/php-collection/definitions.php
+++ b/contrib/php-collection/definitions.php
@@ -386,6 +386,18 @@ function load_graph_definitions($logarithmic = false, $tinylegend = false) {
                'GPRINT:avg:AVERAGE:%4.1lf Avg,',
                'GPRINT:max:MAX:%4.1lf Max,',
                'GPRINT:avg:LAST:%4.1lf Last\l');
+       $GraphDefs['conntrack'] = array(
+               '-v', 'Entries',
+               'DEF:avg={file}:entropy:AVERAGE',
+               'DEF:min={file}:entropy:MIN',
+               'DEF:max={file}:entropy:MAX',
+               "AREA:max#$HalfBlue",
+               "AREA:min#$Canvas",
+               "LINE1:avg#$FullBlue:Count",
+               'GPRINT:min:MIN:%4.0lf Min,',
+               'GPRINT:avg:AVERAGE:%4.0lf Avg,',
+               'GPRINT:max:MAX:%4.0lf Max,',
+               'GPRINT:avg:LAST:%4.0lf Last\l');
        $GraphDefs['entropy'] = array(
                '-v', 'Bits',
                'DEF:avg={file}:entropy:AVERAGE',

diff --git a/contrib/redhat/collectd.conf b/contrib/redhat/collectd.conf
index 0aaaee3..f8352ff 100644 (file)
--- a/contrib/redhat/collectd.conf
+++ b/contrib/redhat/collectd.conf
@@ -16,6 +16,7 @@ ReadThreads  5
 LoadPlugin apcups
 #LoadPlugin apple_sensors
 LoadPlugin battery
+LoadPlugin conntrack
 LoadPlugin cpu
 LoadPlugin cpufreq
 LoadPlugin csv

diff --git a/contrib/redhat/collectd.spec b/contrib/redhat/collectd.spec
index 62acc18..012fc48 100644 (file)
--- a/contrib/redhat/collectd.spec
+++ b/contrib/redhat/collectd.spec
@@ -139,6 +139,9 @@ exit 0
 %attr(0644,root,root) %{_libdir}/%{name}/battery.so*
 %attr(0644,root,root) %{_libdir}/%{name}/battery.la
 
+%attr(0644,root,root) %{_libdir}/%{name}/conntrack.so*
+%attr(0644,root,root) %{_libdir}/%{name}/conntrack.la
+
 %attr(0644,root,root) %{_libdir}/%{name}/cpufreq.so*
 %attr(0644,root,root) %{_libdir}/%{name}/cpufreq.la
 

diff --git a/src/Makefile.am b/src/Makefile.am
index 9b85144..8f94b01 100644 (file)
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -166,6 +166,14 @@ collectd_LDADD += "-dlopen" bind.la
 collectd_DEPENDENCIES += bind.la
 endif
 
+if BUILD_PLUGIN_CONNTRACK
+pkglib_LTLIBRARIES += conntrack.la
+conntrack_la_SOURCES = conntrack.c
+conntrack_la_LDFLAGS = -module -avoid-version
+collectd_LDADD += "-dlopen" conntrack.la
+collectd_DEPENDENCIES += conntrack.la
+endif
+
 if BUILD_PLUGIN_CPU
 pkglib_LTLIBRARIES += cpu.la
 cpu_la_SOURCES = cpu.c

diff --git a/src/collectd.conf.in b/src/collectd.conf.in
index 6783a15..92df4a7 100644 (file)
--- a/src/collectd.conf.in
+++ b/src/collectd.conf.in
@@ -56,6 +56,7 @@ FQDNLookup   true
 #@BUILD_PLUGIN_ASCENT_TRUE@LoadPlugin ascent
 #@BUILD_PLUGIN_BATTERY_TRUE@LoadPlugin battery
 #@BUILD_PLUGIN_BIND_TRUE@LoadPlugin bind
+#@BUILD_PLUGIN_CONNTRACK_TRUE@LoadPlugin conntrack
 @BUILD_PLUGIN_CPU_TRUE@@BUILD_PLUGIN_CPU_TRUE@LoadPlugin cpu
 #@BUILD_PLUGIN_CPUFREQ_TRUE@LoadPlugin cpufreq
 @LOAD_PLUGIN_CSV@LoadPlugin csv

diff --git a/src/conntrack.c b/src/conntrack.c
new file mode 100644 (file)
index 0000000..e70ff5f
--- /dev/null
+++ b/src/conntrack.c
@@ -0,0 +1,78 @@
+/**
+ * collectd - src/conntrack.c
+ * Copyright (C) 2009  Tomasz Pala
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; only version 2 of the License is applicable.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+ *
+ * Authors:
+ *   Tomasz Pala <gotar at pld-linux.org>
+ * based on entropy.c by:
+ *   Florian octo Forster <octo at verplant.org>
+ **/
+
+#include "collectd.h"
+#include "common.h"
+#include "plugin.h"
+
+#if !KERNEL_LINUX
+# error "No applicable input method."
+#endif
+
+#define CONNTRACK_FILE "/proc/sys/net/netfilter/nf_conntrack_count"
+
+static void conntrack_submit (double conntrack)
+{
+       value_t values[1];
+       value_list_t vl = VALUE_LIST_INIT;
+
+       values[0].gauge = conntrack;
+
+       vl.values = values;
+       vl.values_len = 1;
+       sstrncpy (vl.host, hostname_g, sizeof (vl.host));
+       sstrncpy (vl.plugin, "conntrack", sizeof (vl.plugin));
+       sstrncpy (vl.type, "conntrack", sizeof (vl.type));
+
+       plugin_dispatch_values (&vl);
+} /* static void conntrack_submit */
+
+static int conntrack_read (void)
+{
+       double conntrack;
+       FILE *fh;
+       char buffer[64];
+
+       fh = fopen (CONNTRACK_FILE, "r");
+       if (fh == NULL)
+               return (-1);
+
+       if (fgets (buffer, sizeof (buffer), fh) == NULL)
+       {
+               fclose (fh);
+               return (-1);
+       }
+       fclose (fh);
+
+       conntrack = atof (buffer);
+
+       if (conntrack > 0.0)
+               conntrack_submit (conntrack);
+
+       return (0);
+} /* static int conntrack_read */
+
+void module_register (void)
+{
+       plugin_register_read ("conntrack", conntrack_read);
+} /* void module_register */

diff --git a/src/types.db b/src/types.db
index b38c207..e07329c 100644 (file)
--- a/src/types.db
+++ b/src/types.db
@@ -9,6 +9,7 @@ cache_size              value:GAUGE:0:4294967295
 charge                 value:GAUGE:0:U
 compression_ratio      value:GAUGE:0:2
 connections            value:COUNTER:0:U
+conntrack              entropy:GAUGE:0:4294967295
 counter                        value:COUNTER:U:U
 cpufreq                        value:GAUGE:0:U
 cpu                    value:COUNTER:0:4294967295