rrd based system stats
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/***************************************************************************
* Copyright (C) 06/2006 by Olaf Rempel *
* razzor@kopf-tisch.de *
* *
* 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; either version 2 of the License, or *
* (at your option) any later version. *
* *
* 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., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "plugins.h"
#include "probe.h"
#define DS_MEMORY 1
#define DS_SWAP 2
struct sammler_plugin plugin;
static const char *mem_ds_def = {
"DS:total:GAUGE:15:0:U "
"DS:free:GAUGE:15:0:U "
"DS:buffers:GAUGE:15:0:U "
"DS:cached:GAUGE:15:0:U "
};
static const char *swap_ds_def = {
"DS:total:GAUGE:15:0:U "
"DS:free:GAUGE:15:0:U "
};
static const char * get_ds(int ds_id)
{
switch (ds_id) {
case DS_MEMORY:
return mem_ds_def;
case DS_SWAP:
return swap_ds_def;
default:
return NULL;
}
}
struct meminfo_ {
unsigned long long memtotal;
unsigned long long memfree;
unsigned long long buffers;
unsigned long long cached;
unsigned long long swaptotal;
unsigned long long swapfree;
};
static int probe(void)
{
FILE *fp;
struct meminfo_ meminfo;
memset(&meminfo, 0, sizeof(meminfo));
fp = fopen("/proc/meminfo", "r");
if (fp == NULL) {
log_print(LOG_WARN, "plugin memory");
return -1;
}
while (fgets(plugin.buffer, plugin.bufsize, fp) != NULL) {
if (!strncmp(plugin.buffer, "MemTotal:", 9))
meminfo.memtotal = atoll(plugin.buffer + 10);
else if (!strncmp(plugin.buffer, "MemFree:", 8))
meminfo.memfree = atoll(plugin.buffer + 9);
else if (!strncmp(plugin.buffer, "Buffers:", 8))
meminfo.buffers = atoll(plugin.buffer + 9);
else if (!strncmp(plugin.buffer, "Cached:", 7))
meminfo.cached = atoll(plugin.buffer + 8);
else if (!strncmp(plugin.buffer, "SwapTotal:", 10))
meminfo.swaptotal = atoll(plugin.buffer + 11);
else if (!strncmp(plugin.buffer, "SwapFree:", 9))
meminfo.swapfree = atoll(plugin.buffer + 10);
}
probe_submit(&plugin, "memory.rrd", DS_MEMORY, "%llu:%llu:%llu:%llu",
meminfo.memtotal, meminfo.memfree,
meminfo.buffers, meminfo.cached);
probe_submit(&plugin, "swap.rrd", DS_SWAP, "%llu:%llu",
meminfo.swaptotal, meminfo.swapfree);
fclose(fp);
return 0;
}
struct sammler_plugin plugin = {
.name = "memory",
.interval = 10,
.bufsize = 1024,
.probe = &probe,
.get_ds = &get_ds,
};