--- /dev/null
+/**
+ * collectd - src/write_graphite.c
+ * Copyright (C) 2011 Scott Sanders
+ *
+ * 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
+ *
+ * Author:
+ * Scott Sanders <scott@jssjr.com>
+ *
+ * based on the excellent write_http plugin
+ **/
+
+#include "collectd.h"
+#include "common.h"
+#include "plugin.h"
+#include "configfile.h"
+
+#include "utils_cache.h"
+#include "utils_parse_option.h"
+
+/* Folks without pthread will need to disable this plugin. */
+#include <pthread.h>
+
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+#include <netinet/in.h>
+#include <netdb.h>
+
+#ifndef WG_FORMAT_NAME
+#define WG_FORMAT_NAME(ret, ret_len, vl, prefix, name) \
+ wg_format_name (ret, ret_len, (vl)->host, (vl)->plugin, (vl)->plugin_instance, \
+ (vl)->type, (vl)->type_instance, prefix, name)
+#endif
+
+/*
+ * Private variables
+ */
+struct wg_callback
+{
+ int sock_fd;
+ struct hostent *server;
+
+ char *host;
+ int port;
+ char *prefix;
+
+ char send_buf[4096];
+ size_t send_buf_free;
+ size_t send_buf_fill;
+ cdtime_t send_buf_init_time;
+
+ pthread_mutex_t send_lock;
+};
+
+
+/*
+ * Functions
+ */
+static void wg_reset_buffer (struct wg_callback *cb) /* {{{ */
+{
+ memset (cb->send_buf, 0, sizeof (cb->send_buf));
+ cb->send_buf_free = sizeof (cb->send_buf);
+ cb->send_buf_fill = 0;
+ cb->send_buf_init_time = cdtime ();
+} /* }}} wg_reset_buffer */
+
+static int wg_send_buffer (struct wg_callback *cb) /* {{{ */
+{
+ int status = 0;
+
+ status = write (cb->sock_fd, cb->send_buf, strlen (cb->send_buf));
+ if (status < 0)
+ {
+ ERROR ("write_graphite plugin: send failed with "
+ "status %i (%s)",
+ status,
+ strerror (errno));
+
+ pthread_mutex_lock (&cb->send_lock);
+
+ DEBUG ("write_graphite plugin: closing socket and restting fd "
+ "so reinit will occur");
+ close (cb->sock_fd);
+ cb->sock_fd = -1;
+
+ pthread_mutex_unlock (&cb->send_lock);
+
+ return (-1);
+ }
+ return (0);
+} /* }}} wg_send_buffer */
+
+static int wg_flush_nolock (cdtime_t timeout, struct wg_callback *cb) /* {{{ */
+{
+ int status;
+
+ DEBUG ("write_graphite plugin: wg_flush_nolock: timeout = %.3f; "
+ "send_buf_fill = %zu;",
+ (double)timeout,
+ cb->send_buf_fill);
+
+ /* timeout == 0 => flush unconditionally */
+ if (timeout > 0)
+ {
+ cdtime_t now;
+
+ now = cdtime ();
+ if ((cb->send_buf_init_time + timeout) > now)
+ return (0);
+ }
+
+ if (cb->send_buf_fill <= 0)
+ {
+ cb->send_buf_init_time = cdtime ();
+ return (0);
+ }
+
+ status = wg_send_buffer (cb);
+ wg_reset_buffer (cb);
+
+ return (status);
+} /* }}} wg_flush_nolock */
+
+static int wg_callback_init (struct wg_callback *cb) /* {{{ */
+{
+ int status;
+
+ struct sockaddr_in serv_addr;
+
+ if (cb->sock_fd > 0)
+ return (0);
+
+ cb->sock_fd = socket (AF_INET, SOCK_STREAM, 0);
+ if (cb->sock_fd < 0)
+ {
+ ERROR ("write_graphite plugin: socket failed: %s", strerror (errno));
+ return (-1);
+ }
+ cb->server = gethostbyname(cb->host);
+ if (cb->server == NULL)
+ {
+ ERROR ("write_graphite plugin: no such host");
+ return (-1);
+ }
+ memset (&serv_addr, 0, sizeof (serv_addr));
+ serv_addr.sin_family = AF_INET;
+ memcpy (&serv_addr.sin_addr.s_addr,
+ cb->server->h_addr,
+ cb->server->h_length);
+ serv_addr.sin_port = htons(cb->port);
+
+ status = connect(cb->sock_fd, (struct sockaddr *) &serv_addr, sizeof(serv_addr));
+ if (status < 0)
+ {
+ char errbuf[1024];
+ sstrerror (errno, errbuf, sizeof (errbuf));
+ ERROR ("write_graphite plugin: connect failed: %s", errbuf);
+ close (cb->sock_fd);
+ cb->sock_fd = -1;
+ return (-1);
+ }
+
+ wg_reset_buffer (cb);
+
+ return (0);
+} /* }}} int wg_callback_init */
+
+static void wg_callback_free (void *data) /* {{{ */
+{
+ struct wg_callback *cb;
+
+ if (data == NULL)
+ return;
+
+ cb = data;
+
+ wg_flush_nolock (/* timeout = */ 0, cb);
+
+ close(cb->sock_fd);
+ sfree(cb->host);
+ sfree(cb->prefix);
+
+ sfree(cb);
+} /* }}} void wg_callback_free */
+
+static int wg_flush (cdtime_t timeout, /* {{{ */
+ const char *identifier __attribute__((unused)),
+ user_data_t *user_data)
+{
+ struct wg_callback *cb;
+ int status;
+
+ if (user_data == NULL)
+ return (-EINVAL);
+
+ cb = user_data->data;
+
+ pthread_mutex_lock (&cb->send_lock);
+
+ if (cb->sock_fd < 0)
+ {
+ status = wg_callback_init (cb);
+ if (status != 0)
+ {
+ ERROR ("write_graphite plugin: wg_callback_init failed.");
+ pthread_mutex_unlock (&cb->send_lock);
+ return (-1);
+ }
+ }
+
+ status = wg_flush_nolock (timeout, cb);
+ pthread_mutex_unlock (&cb->send_lock);
+
+ return (status);
+} /* }}} int wg_flush */
+
+static int wg_format_values (char *ret, size_t ret_len, /* {{{ */
+ int ds_num, const data_set_t *ds, const value_list_t *vl,
+ _Bool store_rates)
+{
+ size_t offset = 0;
+ int status;
+ gauge_t *rates = NULL;
+
+ assert (0 == strcmp (ds->type, vl->type));
+
+ memset (ret, 0, ret_len);
+
+#define BUFFER_ADD(...) do { \
+ status = ssnprintf (ret + offset, ret_len - offset, \
+ __VA_ARGS__); \
+ if (status < 1) \
+ { \
+ sfree (rates); \
+ return (-1); \
+ } \
+ else if (((size_t) status) >= (ret_len - offset)) \
+ { \
+ sfree (rates); \
+ return (-1); \
+ } \
+ else \
+ offset += ((size_t) status); \
+} while (0)
+
+ if (ds->ds[ds_num].type == DS_TYPE_GAUGE)
+ BUFFER_ADD ("%f", vl->values[ds_num].gauge);
+ else if (store_rates)
+ {
+ if (rates == NULL)
+ rates = uc_get_rate (ds, vl);
+ if (rates == NULL)
+ {
+ WARNING ("format_values: "
+ "uc_get_rate failed.");
+ return (-1);
+ }
+ BUFFER_ADD ("%g", rates[ds_num]);
+ }
+ else if (ds->ds[ds_num].type == DS_TYPE_COUNTER)
+ BUFFER_ADD ("%llu", vl->values[ds_num].counter);
+ else if (ds->ds[ds_num].type == DS_TYPE_DERIVE)
+ BUFFER_ADD ("%"PRIi64, vl->values[ds_num].derive);
+ else if (ds->ds[ds_num].type == DS_TYPE_ABSOLUTE)
+ BUFFER_ADD ("%"PRIu64, vl->values[ds_num].absolute);
+ else
+ {
+ ERROR ("format_values plugin: Unknown data source type: %i",
+ ds->ds[ds_num].type);
+ sfree (rates);
+ return (-1);
+ }
+
+#undef BUFFER_ADD
+
+ sfree (rates);
+ return (0);
+} /* }}} int wg_format_values */
+
+static int normalize_hostname (char *dst, const char *src) /* {{{ */
+{
+ size_t i;
+
+ int reps = 0;
+
+ for (i = 0; i < strlen(src) ; i++)
+ {
+ if (src[i] == '.')
+ {
+ dst[i] = '_';
+ ++reps;
+ }
+ else
+ dst[i] = src[i];
+ }
+ dst[i] = '\0';
+
+ return reps;
+} /* }}} int normalize_hostname */
+
+static int wg_format_name (char *ret, int ret_len, /* {{{ */
+ const char *hostname,
+ const char *plugin, const char *plugin_instance,
+ const char *type, const char *type_instance,
+ const char *prefix, const char *ds_name)
+{
+ int status;
+ char *n_hostname;
+
+ assert (plugin != NULL);
+ assert (type != NULL);
+
+ if ((n_hostname = malloc(strlen(hostname)+1)) == NULL)
+ {
+ ERROR ("Unable to allocate memory for normalized hostname buffer");
+ return (-1);
+ }
+
+ if (normalize_hostname(n_hostname, hostname) == -1)
+ {
+ ERROR ("Unable to normalize hostname");
+ return (-1);
+ }
+
+ if ((plugin_instance == NULL) || (strlen (plugin_instance) == 0))
+ {
+ if ((type_instance == NULL) || (strlen (type_instance) == 0))
+ {
+ if ((ds_name == NULL) || (strlen (ds_name) == 0))
+ status = ssnprintf (ret, ret_len, "%s.%s.%s.%s",
+ prefix, n_hostname, plugin, type);
+ else
+ status = ssnprintf (ret, ret_len, "%s.%s.%s.%s.%s",
+ prefix, n_hostname, plugin, type, ds_name);
+ }
+ else
+ {
+ if ((ds_name == NULL) || (strlen (ds_name) == 0))
+ status = ssnprintf (ret, ret_len, "%s.%s.%s.%s-%s",
+ prefix, n_hostname, plugin, type,
+ type_instance);
+ else
+ status = ssnprintf (ret, ret_len, "%s.%s.%s.%s-%s.%s",
+ prefix, n_hostname, plugin, type,
+ type_instance, ds_name);
+ }
+ }
+ else
+ {
+ if ((type_instance == NULL) || (strlen (type_instance) == 0))
+ {
+ if ((ds_name == NULL) || (strlen (ds_name) == 0))
+ status = ssnprintf (ret, ret_len, "%s.%s.%s.%s.%s",
+ prefix, n_hostname, plugin,
+ plugin_instance, type);
+ else
+ status = ssnprintf (ret, ret_len, "%s.%s.%s.%s.%s.%s",
+ prefix, n_hostname, plugin,
+ plugin_instance, type, ds_name);
+ }
+ else
+ {
+ if ((ds_name == NULL) || (strlen (ds_name) == 0))
+ status = ssnprintf (ret, ret_len, "%s.%s.%s.%s.%s-%s",
+ prefix, n_hostname, plugin,
+ plugin_instance, type, type_instance);
+ else
+ status = ssnprintf (ret, ret_len, "%s.%s.%s.%s.%s-%s.%s",
+ prefix, n_hostname, plugin,
+ plugin_instance, type, type_instance, ds_name);
+ }
+ }
+
+ sfree(n_hostname);
+
+ if ((status < 1) || (status >= ret_len))
+ return (-1);
+ return (0);
+} /* }}} int wg_format_name */
+
+static int wg_send_message (const char* key, const char* value, cdtime_t time, struct wg_callback *cb) /* {{{ */
+{
+ int status;
+ size_t message_len;
+ char message[1024];
+
+ message_len = (size_t) ssnprintf (message, sizeof (message),
+ "%s %s %.0f\n",
+ key,
+ value,
+ CDTIME_T_TO_DOUBLE(time));
+ if (message_len >= sizeof (message)) {
+ ERROR ("write_graphite plugin: message buffer too small: "
+ "Need %zu bytes.", message_len + 1);
+ return (-1);
+ }
+
+
+ pthread_mutex_lock (&cb->send_lock);
+
+ if (cb->sock_fd < 0)
+ {
+ status = wg_callback_init (cb);
+ if (status != 0)
+ {
+ ERROR ("write_graphite plugin: wg_callback_init failed.");
+ pthread_mutex_unlock (&cb->send_lock);
+ return (-1);
+ }
+ }
+
+ if (message_len >= cb->send_buf_free)
+ {
+ status = wg_flush_nolock (/* timeout = */ 0, cb);
+ if (status != 0)
+ {
+ pthread_mutex_unlock (&cb->send_lock);
+ return (status);
+ }
+ }
+ assert (message_len < cb->send_buf_free);
+
+ /* `message_len + 1' because `message_len' does not include the
+ * trailing null byte. Neither does `send_buffer_fill'. */
+ memcpy (cb->send_buf + cb->send_buf_fill,
+ message, message_len + 1);
+ cb->send_buf_fill += message_len;
+ cb->send_buf_free -= message_len;
+
+ DEBUG ("write_graphite plugin: <%s:%d> buf %zu/%zu (%g%%) \"%s\"",
+ cb->host,
+ cb->port,
+ cb->send_buf_fill, sizeof (cb->send_buf),
+ 100.0 * ((double) cb->send_buf_fill) / ((double) sizeof (cb->send_buf)),
+ message);
+
+ /* Check if we have enough space for this message. */
+ pthread_mutex_unlock (&cb->send_lock);
+
+ return (0);
+} /* }}} int wg_send_message */
+
+static int wg_write_messages (const data_set_t *ds, const value_list_t *vl, /* {{{ */
+ struct wg_callback *cb)
+{
+ char key[10*DATA_MAX_NAME_LEN];
+ char values[512];
+
+ int status, i;
+
+ if (0 != strcmp (ds->type, vl->type))
+ {
+ ERROR ("write_graphite plugin: DS type does not match "
+ "value list type");
+ return -1;
+ }
+
+ if (ds->ds_num > 1)
+ {
+ for (i = 0; i < ds->ds_num; i++)
+ {
+ /* Copy the identifier to `key' and escape it. */
+ status = WG_FORMAT_NAME (key, sizeof (key), vl, cb->prefix, ds->ds[i].name);
+ if (status != 0)
+ {
+ ERROR ("write_graphite plugin: error with format_name");
+ return (status);
+ }
+
+ escape_string (key, sizeof (key));
+ /* Convert the values to an ASCII representation and put that into
+ * `values'. */
+ status = wg_format_values (values, sizeof (values), i, ds, vl, 0);
+ if (status != 0)
+ {
+ ERROR ("write_graphite plugin: error with "
+ "wg_format_values");
+ return (status);
+ }
+
+ /* Send the message to graphite */
+ status = wg_send_message (key, values, vl->time, cb);
+ if (status != 0)
+ {
+ ERROR ("write_graphite plugin: error with "
+ "wg_send_message");
+ return (status);
+ }
+ }
+ }
+ else
+ {
+ /* Copy the identifier to `key' and escape it. */
+ status = WG_FORMAT_NAME (key, sizeof (key), vl, cb->prefix, NULL);
+ if (status != 0)
+ {
+ ERROR ("write_graphite plugin: error with format_name");
+ return (status);
+ }
+
+ escape_string (key, sizeof (key));
+ /* Convert the values to an ASCII representation and put that into
+ * `values'. */
+ status = wg_format_values (values, sizeof (values), 0, ds, vl, 0);
+ if (status != 0)
+ {
+ ERROR ("write_graphite plugin: error with "
+ "wg_format_values");
+ return (status);
+ }
+
+ /* Send the message to graphite */
+ status = wg_send_message (key, values, vl->time, cb);
+ if (status != 0)
+ {
+ ERROR ("write_graphite plugin: error with "
+ "wg_send_message");
+ return (status);
+ }
+ }
+
+ return (0);
+} /* }}} int wg_write_messages */
+
+static int wg_write (const data_set_t *ds, const value_list_t *vl, /* {{{ */
+ user_data_t *user_data)
+{
+ struct wg_callback *cb;
+ int status;
+
+ if (user_data == NULL)
+ return (-EINVAL);
+
+ cb = user_data->data;
+
+ status = wg_write_messages (ds, vl, cb);
+
+ return (status);
+} /* }}} int wg_write */
+
+static int config_set_number (int *dest, /* {{{ */
+ oconfig_item_t *ci)
+{
+ if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
+ {
+ WARNING ("write_graphite plugin: The `%s' config option "
+ "needs exactly one numeric argument.", ci->key);
+ return (-1);
+ }
+
+ *dest = ci->values[0].value.number;
+
+ return (0);
+} /* }}} int config_set_number */
+
+static int config_set_string (char **ret_string, /* {{{ */
+ oconfig_item_t *ci)
+{
+ char *string;
+
+ if ((ci->values_num != 1)
+ || (ci->values[0].type != OCONFIG_TYPE_STRING))
+ {
+ WARNING ("write_graphite plugin: The `%s' config option "
+ "needs exactly one string argument.", ci->key);
+ return (-1);
+ }
+
+ string = strdup (ci->values[0].value.string);
+ if (string == NULL)
+ {
+ ERROR ("write_graphite plugin: strdup failed.");
+ return (-1);
+ }
+
+ if (*ret_string != NULL)
+ sfree (*ret_string);
+ *ret_string = string;
+
+ return (0);
+} /* }}} int config_set_string */
+
+static int wg_config_carbon (oconfig_item_t *ci) /* {{{ */
+{
+ struct wg_callback *cb;
+ user_data_t user_data;
+ int i;
+
+ cb = malloc (sizeof (*cb));
+ if (cb == NULL)
+ {
+ ERROR ("write_graphite plugin: malloc failed.");
+ return (-1);
+ }
+ memset (cb, 0, sizeof (*cb));
+ cb->sock_fd = -1;
+ cb->host = NULL;
+ cb->port = 2003;
+ cb->prefix = NULL;
+ cb->server = NULL;
+
+ pthread_mutex_init (&cb->send_lock, /* attr = */ NULL);
+
+ config_set_string (&cb->host, ci);
+ if (cb->host == NULL)
+ return (-1);
+
+ for (i = 0; i < ci->children_num; i++)
+ {
+ oconfig_item_t *child = ci->children + i;
+
+ if (strcasecmp ("Port", child->key) == 0)
+ config_set_number (&cb->port, child);
+ else if (strcasecmp ("Prefix", child->key) == 0)
+ config_set_string (&cb->prefix, child);
+ else
+ {
+ ERROR ("write_graphite plugin: Invalid configuration "
+ "option: %s.", child->key);
+ }
+ }
+
+ DEBUG ("write_graphite: Registering write callback to carbon agent "
+ "%s:%d", cb->host, cb->port);
+
+ memset (&user_data, 0, sizeof (user_data));
+ user_data.data = cb;
+ user_data.free_func = NULL;
+ plugin_register_flush ("write_graphite", wg_flush, &user_data);
+
+ user_data.free_func = wg_callback_free;
+ plugin_register_write ("write_graphite", wg_write, &user_data);
+
+ return (0);
+} /* }}} int wg_config_carbon */
+
+static int wg_config (oconfig_item_t *ci) /* {{{ */
+{
+ int i;
+
+ for (i = 0; i < ci->children_num; i++)
+ {
+ oconfig_item_t *child = ci->children + i;
+
+ if (strcasecmp ("Carbon", child->key) == 0)
+ wg_config_carbon (child);
+ else
+ {
+ ERROR ("write_graphite plugin: Invalid configuration "
+ "option: %s.", child->key);
+ }
+ }
+
+ return (0);
+} /* }}} int wg_config */
+
+void module_register (void) /* {{{ */
+{
+ plugin_register_complex_config ("write_graphite", wg_config);
+} /* }}} void module_register */
+
+/* vim: set fdm=marker sw=4 ts=4 sts=4 tw=78 et : */
projects / collectd.git / commitdiff