From 92af8f3cd08e9d6e607a477d2a59e34c4d048d58 Mon Sep 17 00:00:00 2001 From: Scott Sanders Date: Mon, 8 Aug 2011 10:47:10 -0400 Subject: [PATCH 1/1] initial sync from private repo --- write_graphite.c | 675 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 675 insertions(+) create mode 100644 write_graphite.c diff --git a/write_graphite.c b/write_graphite.c new file mode 100644 index 00000000..b58dbfb0 --- /dev/null +++ b/write_graphite.c @@ -0,0 +1,675 @@ +/** + * 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 + * + * 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 + +#include +#include +#include + +#include +#include + +#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 : */ -- 2.11.0