You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
172 lines
5.1 KiB
172 lines
5.1 KiB
From: Nick Hainke <vincent@systemli.org>
|
|
Date: Mon, 7 Dec 2020 23:07:30 +0100
|
|
Subject: [PATCH] dhcpleases: add dhcpleases plugin
|
|
|
|
Changelog: dhcpleases: add plugin for counting current dhcp leases
|
|
|
|
The plugin is useful for the Freifunk Community. Currently, we use
|
|
the exec-plugin. With that dhcpleases plugin we have native collectd
|
|
support to measure this important statistic.
|
|
|
|
Signed-off-by: Nick Hainke <vincent@systemli.org>
|
|
---
|
|
Makefile.am | 6 ++++
|
|
README | 3 ++
|
|
configure.ac | 2 ++
|
|
src/collectd.conf.in | 5 +++
|
|
src/dhcpleases.c | 83 ++++++++++++++++++++++++++++++++++++++++++++
|
|
5 files changed, 99 insertions(+)
|
|
create mode 100644 src/dhcpleases.c
|
|
|
|
--- a/Makefile.am
|
|
+++ b/Makefile.am
|
|
@@ -963,6 +963,12 @@ df_la_LDFLAGS = $(PLUGIN_LDFLAGS)
|
|
df_la_LIBADD = libignorelist.la libmount.la
|
|
endif
|
|
|
|
+if BUILD_PLUGIN_DHCPLEASES
|
|
+pkglib_LTLIBRARIES += dhcpleases.la
|
|
+dhcpleases_la_SOURCES = src/dhcpleases.c
|
|
+dhcpleases_la_LDFLAGS = $(PLUGIN_LDFLAGS)
|
|
+endif
|
|
+
|
|
if BUILD_PLUGIN_DISK
|
|
pkglib_LTLIBRARIES += disk.la
|
|
disk_la_SOURCES = src/disk.c
|
|
--- a/README
|
|
+++ b/README
|
|
@@ -106,6 +106,9 @@ Features
|
|
Disk utilization: Sectors read/written, number of read/write actions,
|
|
average time an IO-operation took to complete.
|
|
|
|
+ - dhcpleases
|
|
+ Collect number of current dhcp leases.
|
|
+
|
|
- dns
|
|
DNS traffic: Query types, response codes, opcodes and traffic/octets
|
|
transferred.
|
|
--- a/configure.ac
|
|
+++ b/configure.ac
|
|
@@ -7063,6 +7063,7 @@ AC_PLUGIN([curl_xml], [$plugi
|
|
AC_PLUGIN([dbi], [$with_libdbi], [General database statistics])
|
|
AC_PLUGIN([dcpmm], [$with_libpmwapi], [Intel(R) Optane(TM) DC Persistent Memory performance and health statistics])
|
|
AC_PLUGIN([df], [$plugin_df], [Filesystem usage statistics])
|
|
+AC_PLUGIN([dhcpleases], [yes], [DHCP Leases])
|
|
AC_PLUGIN([disk], [$plugin_disk], [Disk usage statistics])
|
|
AC_PLUGIN([dns], [$with_libpcap], [DNS traffic analysis])
|
|
AC_PLUGIN([dpdkevents], [$plugin_dpdkevents], [Events from DPDK])
|
|
@@ -7512,6 +7513,7 @@ AC_MSG_RESULT([ curl_xml . . . . . .
|
|
AC_MSG_RESULT([ dbi . . . . . . . . . $enable_dbi])
|
|
AC_MSG_RESULT([ dcpmm . . . . . . . $enable_dcpmm])
|
|
AC_MSG_RESULT([ df . . . . . . . . . $enable_df])
|
|
+AC_MSG_RESULT([ dhcpleases. . . . . . $enable_dhcpleases])
|
|
AC_MSG_RESULT([ disk . . . . . . . . $enable_disk])
|
|
AC_MSG_RESULT([ dns . . . . . . . . . $enable_dns])
|
|
AC_MSG_RESULT([ dpdkevents. . . . . . $enable_dpdkevents])
|
|
--- a/src/collectd.conf.in
|
|
+++ b/src/collectd.conf.in
|
|
@@ -119,6 +119,7 @@
|
|
#@BUILD_PLUGIN_DBI_TRUE@LoadPlugin dbi
|
|
#@BUILD_PLUGIN_DCPMM_TRUE@LoadPlugin dcpmm
|
|
#@BUILD_PLUGIN_DF_TRUE@LoadPlugin df
|
|
+#@BUILD_PLUGIN_DHCPLEASES_TRUE@LoadPlugin dhcpleases
|
|
#@BUILD_PLUGIN_DISK_TRUE@LoadPlugin disk
|
|
#@BUILD_PLUGIN_DNS_TRUE@LoadPlugin dns
|
|
#@BUILD_PLUGIN_DPDKEVENTS_TRUE@LoadPlugin dpdkevents
|
|
@@ -690,6 +691,10 @@
|
|
# SelectNumericQueryTypes true
|
|
#</Plugin>
|
|
|
|
+#<Plugin dhcpleases>
|
|
+# Path "/tmp/dhcp.leases"
|
|
+#</Plugin>
|
|
+
|
|
#<Plugin "dpdkevents">
|
|
# <EAL>
|
|
# Coremask "0x1"
|
|
--- /dev/null
|
|
+++ b/src/dhcpleases.c
|
|
@@ -0,0 +1,83 @@
|
|
+#include <errno.h>
|
|
+#include <stdio.h>
|
|
+
|
|
+#include "utils/common/common.h"
|
|
+
|
|
+#include "configfile.h"
|
|
+#include "plugin.h"
|
|
+
|
|
+static char *dhcp_lease_file;
|
|
+
|
|
+static const char *config_keys[] = {
|
|
+ "Path",
|
|
+};
|
|
+static int config_keys_num = STATIC_ARRAY_SIZE(config_keys);
|
|
+
|
|
+/* copied from ping.c plugin */
|
|
+static int config_set_string(const char *name, /* {{{ */
|
|
+ char **var, const char *value) {
|
|
+ char *tmp;
|
|
+
|
|
+ tmp = strdup(value);
|
|
+ if (tmp == NULL) {
|
|
+ ERROR("dhcpleases plugin: Setting `%s' to `%s' failed: strdup failed: %s", name,
|
|
+ value, STRERRNO);
|
|
+ return 1;
|
|
+ }
|
|
+
|
|
+ if (*var != NULL)
|
|
+ free(*var);
|
|
+ *var = tmp;
|
|
+ return 0;
|
|
+} /* }}} int config_set_string */
|
|
+
|
|
+static int dhcpleases_config(const char *key, const char *value) {
|
|
+ if (strcasecmp(key, "Path") == 0) {
|
|
+ int status = config_set_string(key, &dhcp_lease_file, value);
|
|
+ if (status != 0)
|
|
+ return status;
|
|
+ }
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static void dhcpleases_submit(gauge_t counter) {
|
|
+ value_list_t vl = VALUE_LIST_INIT;
|
|
+ value_t values[] = {
|
|
+ {.gauge = counter},
|
|
+ };
|
|
+
|
|
+ vl.values = values;
|
|
+ vl.values_len = STATIC_ARRAY_SIZE(values);
|
|
+
|
|
+ sstrncpy(vl.plugin, "dhcpleases", sizeof(vl.plugin));
|
|
+ sstrncpy(vl.type, "count", sizeof(vl.type));
|
|
+
|
|
+ plugin_dispatch_values(&vl);
|
|
+}
|
|
+
|
|
+static int dhcp_leases_read(void) {
|
|
+
|
|
+ FILE *fh;
|
|
+ char buffer[1024];
|
|
+ gauge_t count = 0;
|
|
+
|
|
+ if ((fh = fopen(dhcp_lease_file, "r")) == NULL) {
|
|
+ WARNING("interface plugin: fopen: %s", STRERRNO);
|
|
+ return -1;
|
|
+ }
|
|
+
|
|
+ while (fgets(buffer, 1024, fh) != NULL) {
|
|
+ count++;
|
|
+ }
|
|
+ fclose(fh);
|
|
+
|
|
+ dhcpleases_submit(count);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+void module_register(void) {
|
|
+ plugin_register_config("dhcpleases", dhcpleases_config, config_keys,
|
|
+ config_keys_num);
|
|
+ plugin_register_read("dhcpleases", dhcp_leases_read);
|
|
+}
|