* collectd - src/rrdcached.c
* Copyright (C) 2008-2013 Florian octo Forster
*
- * 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.
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
*
- * 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.
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
*
- * 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
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
*
* Authors:
* Florian octo Forster <octo at collectd.org>
**/
#include "collectd.h"
+
#include "plugin.h"
#include "common.h"
#include "utils_rrdcreate.h"
{
int offset;
int status;
- int i;
time_t t;
assert (0 == strcmp (ds->type, vl->type));
return (-1);
offset = status;
- for (i = 0; i < ds->ds_num; i++)
+ for (size_t i = 0; i < ds->ds_num; i++)
{
if ((ds->ds[i].type != DS_TYPE_COUNTER)
&& (ds->ds[i].type != DS_TYPE_GAUGE)
status = ssnprintf (buffer + offset, buffer_len - offset,
":%llu", vl->values[i].counter);
}
- else if (ds->ds[i].type == DS_TYPE_GAUGE)
+ else if (ds->ds[i].type == DS_TYPE_GAUGE)
{
status = ssnprintf (buffer + offset, buffer_len - offset,
":%f", vl->values[i].gauge);
else /* if (ds->ds[i].type == DS_TYPE_ABSOLUTE) */ {
status = ssnprintf (buffer + offset, buffer_len - offset,
":%"PRIu64, vl->values[i].absolute);
-
+
}
if ((status < 1) || (status >= (buffer_len - offset)))
return (0);
} /* int value_list_to_string */
-static int value_list_to_filename (char *buffer, int buffer_len,
- const data_set_t *ds, const value_list_t *vl)
+static int value_list_to_filename (char *buffer, size_t buffer_size,
+ value_list_t const *vl)
{
- int offset = 0;
+ char const suffix[] = ".rrd";
int status;
-
- assert (0 == strcmp (ds->type, vl->type));
+ size_t len;
if (datadir != NULL)
{
- status = ssnprintf (buffer + offset, buffer_len - offset,
- "%s/", datadir);
- if ((status < 1) || (status >= buffer_len - offset))
- return (-1);
- offset += status;
- }
+ size_t datadir_len = strlen (datadir) + 1;
- status = ssnprintf (buffer + offset, buffer_len - offset,
- "%s/", vl->host);
- if ((status < 1) || (status >= buffer_len - offset))
- return (-1);
- offset += status;
+ if (datadir_len >= buffer_size)
+ return (ENOMEM);
- if (strlen (vl->plugin_instance) > 0)
- status = ssnprintf (buffer + offset, buffer_len - offset,
- "%s-%s/", vl->plugin, vl->plugin_instance);
- else
- status = ssnprintf (buffer + offset, buffer_len - offset,
- "%s/", vl->plugin);
- if ((status < 1) || (status >= buffer_len - offset))
- return (-1);
- offset += status;
+ sstrncpy (buffer, datadir, buffer_size);
+ buffer[datadir_len - 1] = '/';
+ buffer[datadir_len] = 0;
- if (strlen (vl->type_instance) > 0)
- status = ssnprintf (buffer + offset, buffer_len - offset,
- "%s-%s", vl->type, vl->type_instance);
- else
- status = ssnprintf (buffer + offset, buffer_len - offset,
- "%s", vl->type);
- if ((status < 1) || (status >= buffer_len - offset))
- return (-1);
- offset += status;
+ buffer += datadir_len;
+ buffer_size -= datadir_len;
+ }
+
+ status = FORMAT_VL (buffer, buffer_size, vl);
+ if (status != 0)
+ return (status);
+
+ len = strlen (buffer);
+ assert (len < buffer_size);
+ buffer += len;
+ buffer_size -= len;
- strncpy (buffer + offset, ".rrd", buffer_len - offset);
- buffer[buffer_len - 1] = 0;
+ if (buffer_size <= sizeof (suffix))
+ return (ENOMEM);
+ memcpy (buffer, suffix, sizeof (suffix));
return (0);
} /* int value_list_to_filename */
static int rc_config (oconfig_item_t *ci)
{
- int i;
-
- for (i = 0; i < ci->children_num; i++)
+ for (int i = 0; i < ci->children_num; i++)
{
oconfig_item_t const *child = ci->children + i;
const char *key = child->key;
return (0);
} /* int rc_config */
+static int try_reconnect (void)
+{
+ int status;
+
+ rrdc_disconnect ();
+
+ rrd_clear_error ();
+ status = rrdc_connect (daemon_address);
+ if (status != 0)
+ {
+ ERROR ("rrdcached plugin: Failed to reconnect to RRDCacheD "
+ "at %s: %s (status=%d)", daemon_address, rrd_get_error (), status);
+ return (-1);
+ }
+
+ INFO ("rrdcached plugin: Successfully reconnected to RRDCacheD "
+ "at %s", daemon_address);
+ return (0);
+} /* int try_reconnect */
+
static int rc_read (void)
{
int status;
rrdc_stats_t *head;
- rrdc_stats_t *ptr;
+ _Bool retried = 0;
- value_t values[1];
value_list_t vl = VALUE_LIST_INIT;
+ vl.values = &(value_t) { .gauge = NAN };
+ vl.values_len = 1;
if (daemon_address == NULL)
return (-1);
if (!config_collect_stats)
return (-1);
- vl.values = values;
- vl.values_len = 1;
-
- if ((strncmp ("unix:", daemon_address, strlen ("unix:")) == 0)
- || (daemon_address[0] == '/'))
- sstrncpy (vl.host, hostname_g, sizeof (vl.host));
- else
+ if ((strncmp ("unix:", daemon_address, strlen ("unix:")) != 0)
+ && (daemon_address[0] != '/'))
sstrncpy (vl.host, daemon_address, sizeof (vl.host));
sstrncpy (vl.plugin, "rrdcached", sizeof (vl.plugin));
+ rrd_clear_error ();
status = rrdc_connect (daemon_address);
if (status != 0)
{
- ERROR ("rrdcached plugin: rrdc_connect (%s) failed with status %i.",
- daemon_address, status);
+ ERROR ("rrdcached plugin: Failed to connect to RRDCacheD "
+ "at %s: %s (status=%d)", daemon_address, rrd_get_error (), status);
return (-1);
}
- head = NULL;
- status = rrdc_stats_get (&head);
- if (status != 0)
+ while (42)
{
- ERROR ("rrdcached plugin: rrdc_stats_get failed with status %i.", status);
+ /* The RRD client lib does not provide any means for checking a
+ * connection, hence we'll have to retry upon failed operations. */
+ head = NULL;
+ rrd_clear_error ();
+ status = rrdc_stats_get (&head);
+ if (status == 0)
+ break;
+
+ if (!retried)
+ {
+ retried = 1;
+ if (try_reconnect () == 0)
+ continue;
+ /* else: report the error and fail */
+ }
+
+ ERROR ("rrdcached plugin: rrdc_stats_get failed: %s (status=%i).",
+ rrd_get_error (), status);
return (-1);
}
- for (ptr = head; ptr != NULL; ptr = ptr->next)
+ for (rrdc_stats_t *ptr = head; ptr != NULL; ptr = ptr->next)
{
if (ptr->type == RRDC_STATS_TYPE_GAUGE)
- values[0].gauge = (gauge_t) ptr->value.gauge;
+ vl.values[0].gauge = (gauge_t) ptr->value.gauge;
else if (ptr->type == RRDC_STATS_TYPE_COUNTER)
- values[0].counter = (counter_t) ptr->value.counter;
+ vl.values[0].counter = (counter_t) ptr->value.counter;
else
continue;
char values[512];
char *values_array[2];
int status;
+ _Bool retried = 0;
if (daemon_address == NULL)
{
return (-1);
}
- if (value_list_to_filename (filename, sizeof (filename), ds, vl) != 0)
+ if (value_list_to_filename (filename, sizeof (filename), vl) != 0)
{
ERROR ("rrdcached plugin: value_list_to_filename failed.");
return (-1);
}
}
+ rrd_clear_error ();
status = rrdc_connect (daemon_address);
if (status != 0)
{
- ERROR ("rrdcached plugin: rrdc_connect (%s) failed with status %i.",
- daemon_address, status);
+ ERROR ("rrdcached plugin: Failed to connect to RRDCacheD "
+ "at %s: %s (status=%d)", daemon_address, rrd_get_error (), status);
return (-1);
}
- status = rrdc_update (filename, /* values_num = */ 1, (void *) values_array);
- if (status != 0)
+ while (42)
{
- ERROR ("rrdcached plugin: rrdc_update (%s, [%s], 1) failed with "
- "status %i.",
- filename, values_array[0], status);
+ /* The RRD client lib does not provide any means for checking a
+ * connection, hence we'll have to retry upon failed operations. */
+ rrd_clear_error ();
+ status = rrdc_update (filename, /* values_num = */ 1, (void *) values_array);
+ if (status == 0)
+ break;
+
+ if (!retried)
+ {
+ retried = 1;
+ if (try_reconnect () == 0)
+ continue;
+ /* else: report the error and fail */
+ }
+
+ ERROR ("rrdcached plugin: rrdc_update (%s, [%s], 1) failed: %s (status=%i)",
+ filename, values_array[0], rrd_get_error (), status);
return (-1);
}
{
char filename[PATH_MAX + 1];
int status;
+ _Bool retried = 0;
if (identifier == NULL)
return (EINVAL);
else
ssnprintf (filename, sizeof (filename), "%s.rrd", identifier);
+ rrd_clear_error ();
status = rrdc_connect (daemon_address);
if (status != 0)
{
- ERROR ("rrdcached plugin: rrdc_connect (%s) failed with status %i.",
- daemon_address, status);
+ ERROR ("rrdcached plugin: Failed to connect to RRDCacheD "
+ "at %s: %s (status=%d)", daemon_address, rrd_get_error (), status);
return (-1);
}
- status = rrdc_flush (filename);
- if (status != 0)
+ while (42)
{
- ERROR ("rrdcached plugin: rrdc_flush (%s) failed with status %i.",
- filename, status);
+ /* The RRD client lib does not provide any means for checking a
+ * connection, hence we'll have to retry upon failed operations. */
+ rrd_clear_error ();
+ status = rrdc_flush (filename);
+ if (status == 0)
+ break;
+
+ if (!retried)
+ {
+ retried = 1;
+ if (try_reconnect () == 0)
+ continue;
+ /* else: report the error and fail */
+ }
+
+ ERROR ("rrdcached plugin: rrdc_flush (%s) failed: %s (status=%i).",
+ filename, rrd_get_error (), status);
return (-1);
}
DEBUG ("rrdcached plugin: rrdc_flush (%s): Success.", filename);