+++ /dev/null
-/**
- * collectd - src/write_tsdb.c
- * Copyright (C) 2012 Pierre-Yves Ritschard
- * Copyright (C) 2011 Scott Sanders
- * Copyright (C) 2009 Paul Sadauskas
- * Copyright (C) 2009 Doug MacEachern
- * Copyright (C) 2007-2012 Florian octo Forster
- * Copyright (C) 2013-2014 Limelight Networks, Inc.
- * 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
- *
- * Based on the write_graphite plugin. Authors:
- * Florian octo Forster <octo at collectd.org>
- * Doug MacEachern <dougm at hyperic.com>
- * Paul Sadauskas <psadauskas at gmail.com>
- * Scott Sanders <scott at jssjr.com>
- * Pierre-Yves Ritschard <pyr at spootnik.org>
- * write_tsdb Authors:
- * Brett Hawn <bhawn at llnw.com>
- * Kevin Bowling <kbowling@llnw.com>
- **/
-
-/* write_tsdb plugin configuation example
- *
- * <Plugin write_tsdb>
- * <Node>
- * Host "localhost"
- * Port "4242"
- * HostTags "status=production deviceclass=www"
- * </Node>
- * </Plugin>
- */
-
-#include "collectd.h"
-#include "common.h"
-#include "plugin.h"
-#include "configfile.h"
-
-#include "utils_cache.h"
-#include "utils_parse_option.h"
-
-#include <pthread.h>
-#include <sys/socket.h>
-#include <netdb.h>
-
-#ifndef WT_DEFAULT_NODE
-# define WT_DEFAULT_NODE "localhost"
-#endif
-
-#ifndef WT_DEFAULT_SERVICE
-# define WT_DEFAULT_SERVICE "4242"
-#endif
-
-#ifndef WT_DEFAULT_ESCAPE
-# define WT_DEFAULT_ESCAPE '.'
-#endif
-
-/* Ethernet - (IPv6 + TCP) = 1500 - (40 + 32) = 1428 */
-#ifndef WT_SEND_BUF_SIZE
-# define WT_SEND_BUF_SIZE 1428
-#endif
-
-/*
- * Private variables
- */
-struct wt_callback
-{
- int sock_fd;
-
- char *node;
- char *service;
- char *host_tags;
- char escape_char;
-
- _Bool store_rates;
- _Bool separate_instances;
- _Bool always_append_ds;
-
- char send_buf[WT_SEND_BUF_SIZE];
- size_t send_buf_free;
- size_t send_buf_fill;
- cdtime_t send_buf_init_time;
-
- pthread_mutex_t send_lock;
-};
-
-
-/*
- * Functions
- */
-static void wt_reset_buffer(struct wt_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();
-}
-
-static int wt_send_buffer(struct wt_callback *cb)
-{
- ssize_t status = 0;
-
- status = swrite(cb->sock_fd, cb->send_buf, strlen(cb->send_buf));
- if (status < 0)
- {
- char errbuf[1024];
- ERROR("write_tsdb plugin: send failed with status %zi (%s)",
- status, sstrerror (errno, errbuf, sizeof (errbuf)));
-
- close (cb->sock_fd);
- cb->sock_fd = -1;
-
- return -1;
- }
-
- return 0;
-}
-
-/* NOTE: You must hold cb->send_lock when calling this function! */
-static int wt_flush_nolock(cdtime_t timeout, struct wt_callback *cb)
-{
- int status;
-
- DEBUG("write_tsdb plugin: wt_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 = wt_send_buffer(cb);
- wt_reset_buffer(cb);
-
- return status;
-}
-
-static int wt_callback_init(struct wt_callback *cb)
-{
- struct addrinfo ai_hints;
- struct addrinfo *ai_list;
- struct addrinfo *ai_ptr;
- int status;
-
- const char *node = cb->node ? cb->node : WT_DEFAULT_NODE;
- const char *service = cb->service ? cb->service : WT_DEFAULT_SERVICE;
-
- if (cb->sock_fd > 0)
- return 0;
-
- memset(&ai_hints, 0, sizeof(ai_hints));
-#ifdef AI_ADDRCONFIG
- ai_hints.ai_flags |= AI_ADDRCONFIG;
-#endif
- ai_hints.ai_family = AF_UNSPEC;
- ai_hints.ai_socktype = SOCK_STREAM;
-
- ai_list = NULL;
-
- status = getaddrinfo(node, service, &ai_hints, &ai_list);
- if (status != 0)
- {
- ERROR("write_tsdb plugin: getaddrinfo (%s, %s) failed: %s",
- node, service, gai_strerror (status));
- return -1;
- }
-
- assert (ai_list != NULL);
- for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
- {
- cb->sock_fd = socket(ai_ptr->ai_family, ai_ptr->ai_socktype,
- ai_ptr->ai_protocol);
- if (cb->sock_fd < 0)
- continue;
-
- status = connect(cb->sock_fd, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
- if (status != 0)
- {
- close(cb->sock_fd);
- cb->sock_fd = -1;
- continue;
- }
-
- break;
- }
-
- freeaddrinfo(ai_list);
-
- if (cb->sock_fd < 0)
- {
- char errbuf[1024];
- ERROR("write_tsdb plugin: Connecting to %s:%s failed. "
- "The last error was: %s", node, service,
- sstrerror (errno, errbuf, sizeof(errbuf)));
- close(cb->sock_fd);
- return -1;
- }
-
- wt_reset_buffer(cb);
-
- return 0;
-}
-
-static void wt_callback_free(void *data)
-{
- struct wt_callback *cb;
-
- if (data == NULL)
- return;
-
- cb = data;
-
- pthread_mutex_lock(&cb->send_lock);
-
- wt_flush_nolock(0, cb);
-
- close(cb->sock_fd);
- cb->sock_fd = -1;
-
- sfree(cb->node);
- sfree(cb->service);
- sfree(cb->host_tags);
-
- pthread_mutex_destroy(&cb->send_lock);
-
- sfree(cb);
-}
-
-static int wt_flush(cdtime_t timeout,
- const char *identifier __attribute__((unused)),
- user_data_t *user_data)
-{
- struct wt_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 = wt_callback_init(cb);
- if (status != 0)
- {
- ERROR("write_tsdb plugin: wt_callback_init failed.");
- pthread_mutex_unlock(&cb->send_lock);
- return -1;
- }
- }
-
- status = wt_flush_nolock(timeout, cb);
- pthread_mutex_unlock(&cb->send_lock);
-
- return status;
-}
-
-static int wt_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("%f", 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;
-}
-
-static int wt_format_name(char *ret, int ret_len,
- const value_list_t *vl,
- const struct wt_callback *cb,
- const char *ds_name)
-{
- int status;
- char *temp = NULL;
- char *prefix = "";
- const char *meta_prefix = "tsdb_prefix";
-
- if (vl->meta) {
- status = meta_data_get_string(vl->meta, meta_prefix, &temp);
- if (status == -ENOENT) {
- /* defaults to empty string */
- } else if (status < 0) {
- sfree(temp);
- return status;
- } else {
- prefix = temp;
- }
- }
-
- if (ds_name != NULL) {
- if (vl->plugin_instance[0] == '\0') {
- ssnprintf(ret, ret_len, "%s%s.%s",
- prefix, vl->plugin, ds_name);
- } else if (vl->type_instance == '\0') {
- ssnprintf(ret, ret_len, "%s%s.%s.%s.%s",
- prefix, vl->plugin, vl->plugin_instance,
- vl->type_instance, ds_name);
- } else {
- ssnprintf(ret, ret_len, "%s%s.%s.%s.%s",
- prefix, vl->plugin, vl->plugin_instance, vl->type,
- ds_name);
- }
- } else if (vl->plugin_instance[0] == '\0') {
- if (vl->type_instance[0] == '\0')
- ssnprintf(ret, ret_len, "%s%s.%s",
- prefix, vl->plugin, vl->type);
- else
- ssnprintf(ret, ret_len, "%s%s.%s",
- prefix, vl->plugin, vl->type_instance);
- } else if (vl->type_instance[0] == '\0') {
- ssnprintf(ret, ret_len, "%s%s.%s.%s",
- prefix, vl->plugin, vl->plugin_instance, vl->type);
- } else {
- ssnprintf(ret, ret_len, "%s%s.%s.%s",
- prefix, vl->plugin, vl->plugin_instance, vl->type_instance);
- }
-
- sfree(temp);
- return 0;
-}
-
-static int wt_send_message (const char* key, const char* value,
- cdtime_t time, struct wt_callback *cb,
- const char* host, meta_data_t *md)
-{
- int status;
- int message_len;
- char *temp = NULL;
- char *tags = "";
- char message[1024];
- char *host_tags = cb->host_tags ? cb->host_tags : "";
- const char *message_fmt;
- const char *meta_tsdb = "tsdb_tags";
-
- /* skip if value is NaN */
- if (value[0] == 'n')
- return 0;
-
- if (md) {
- status = meta_data_get_string(md, meta_tsdb, &temp);
- if (status == -ENOENT) {
- /* defaults to empty string */
- } else if (status < 0) {
- ERROR("write_tsdb plugin: tags metadata get failure");
- sfree(temp);
- pthread_mutex_unlock(&cb->send_lock);
- return status;
- } else {
- tags = temp;
- }
- }
-
- message_fmt = "put %s %u %s fqdn=%s %s %s\r\n";
- message_len = ssnprintf (message, sizeof(message),
- message_fmt,
- key,
- (unsigned int)CDTIME_T_TO_TIME_T(
- time),
- value,
- host,
- tags,
- host_tags);
-
- sfree(temp);
-
- if (message_len >= sizeof(message)) {
- ERROR("write_tsdb plugin: message buffer too small: "
- "Need %d bytes.", message_len + 1);
- return -1;
- }
-
- pthread_mutex_lock(&cb->send_lock);
-
- if (cb->sock_fd < 0)
- {
- status = wt_callback_init(cb);
- if (status != 0)
- {
- ERROR("write_tsdb plugin: wt_callback_init failed.");
- pthread_mutex_unlock(&cb->send_lock);
- return -1;
- }
- }
-
- if (message_len >= cb->send_buf_free)
- {
- status = wt_flush_nolock(0, cb);
- if (status != 0)
- {
- pthread_mutex_unlock(&cb->send_lock);
- return status;
- }
- }
-
- /* Assert that we have enough space for this message. */
- 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_tsdb plugin: [%s]:%s buf %zu/%zu (%.1f %%) \"%s\"",
- cb->node,
- cb->service,
- cb->send_buf_fill, sizeof(cb->send_buf),
- 100.0 * ((double) cb->send_buf_fill) /
- ((double) sizeof(cb->send_buf)),
- message);
-
- pthread_mutex_unlock(&cb->send_lock);
-
- return 0;
-}
-
-static int wt_write_messages(const data_set_t *ds, const value_list_t *vl,
- struct wt_callback *cb)
-{
- char key[10*DATA_MAX_NAME_LEN];
- char values[512];
-
- int status, i;
-
- if (0 != strcmp(ds->type, vl->type))
- {
- ERROR("write_tsdb plugin: DS type does not match "
- "value list type");
- return -1;
- }
-
- for (i = 0; i < ds->ds_num; i++)
- {
- const char *ds_name = NULL;
-
- if (cb->always_append_ds || (ds->ds_num > 1))
- ds_name = ds->ds[i].name;
-
- /* Copy the identifier to 'key' and escape it. */
- status = wt_format_name(key, sizeof(key), vl, cb, ds_name);
- if (status != 0)
- {
- ERROR("write_tsdb 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 = wt_format_values(values, sizeof(values), i, ds, vl,
- cb->store_rates);
- if (status != 0)
- {
- ERROR("write_tsdb plugin: error with "
- "wt_format_values");
- return status;
- }
-
- /* Send the message to tsdb */
- status = wt_send_message(key, values, vl->time, cb, vl->host, vl->meta);
- if (status != 0)
- {
- ERROR("write_tsdb plugin: error with "
- "wt_send_message");
- return status;
- }
- }
-
- return 0;
-}
-
-static int wt_write(const data_set_t *ds, const value_list_t *vl,
- user_data_t *user_data)
-{
- struct wt_callback *cb;
- int status;
-
- if (user_data == NULL)
- return EINVAL;
-
- cb = user_data->data;
-
- status = wt_write_messages(ds, vl, cb);
-
- return status;
-}
-
-static int config_set_char(char *dest,
- oconfig_item_t *ci)
-{
- char buffer[4];
- int status;
-
- memset(buffer, 0, sizeof(buffer));
-
- status = cf_util_get_string_buffer(ci, buffer, sizeof(buffer));
- if (status != 0)
- return (status);
-
- if (buffer[0] == 0)
- {
- ERROR("write_tsdb plugin: Cannot use an empty string for the "
- "\"EscapeCharacter\" option.");
- return -1;
- }
-
- if (buffer[1] != 0)
- {
- WARNING("write_tsdb plugin: Only the first character of the "
- "\"EscapeCharacter\" option ('%c') will be used.",
- (int) buffer[0]);
- }
-
- *dest = buffer[0];
-
- return 0;
-}
-
-static int wt_config_tsd(oconfig_item_t *ci)
-{
- struct wt_callback *cb;
- user_data_t user_data;
- char callback_name[DATA_MAX_NAME_LEN];
- int i;
-
- cb = malloc(sizeof(*cb));
- if (cb == NULL)
- {
- ERROR("write_tsdb plugin: malloc failed.");
- return -1;
- }
- memset(cb, 0, sizeof(*cb));
- cb->sock_fd = -1;
- cb->node = NULL;
- cb->service = NULL;
- cb->host_tags = NULL;
- cb->escape_char = WT_DEFAULT_ESCAPE;
- cb->store_rates = 1;
-
- pthread_mutex_init (&cb->send_lock, NULL);
-
- for (i = 0; i < ci->children_num; i++)
- {
- oconfig_item_t *child = ci->children + i;
-
- if (strcasecmp("Host", child->key) == 0)
- cf_util_get_string(child, &cb->node);
- else if (strcasecmp("Port", child->key) == 0)
- cf_util_get_service(child, &cb->service);
- else if (strcasecmp("HostTags", child->key) == 0)
- cf_util_get_string(child, &cb->host_tags);
- else if (strcasecmp("StoreRates", child->key) == 0)
- cf_util_get_boolean(child, &cb->store_rates);
- else if (strcasecmp("SeparateInstances", child->key) == 0)
- cf_util_get_boolean(child, &cb->separate_instances);
- else if (strcasecmp("AlwaysAppendDS", child->key) == 0)
- cf_util_get_boolean(child, &cb->always_append_ds);
- else if (strcasecmp("EscapeCharacter", child->key) == 0)
- config_set_char(&cb->escape_char, child);
- else
- {
- ERROR("write_tsdb plugin: Invalid configuration "
- "option: %s.", child->key);
- }
- }
-
- ssnprintf(callback_name, sizeof(callback_name), "write_tsdb/%s/%s",
- cb->node != NULL ? cb->node : WT_DEFAULT_NODE,
- cb->service != NULL ? cb->service : WT_DEFAULT_SERVICE);
-
- memset(&user_data, 0, sizeof(user_data));
- user_data.data = cb;
- user_data.free_func = wt_callback_free;
- plugin_register_write(callback_name, wt_write, &user_data);
-
- user_data.free_func = NULL;
- plugin_register_flush(callback_name, wt_flush, &user_data);
-
- return 0;
-}
-
-static int wt_config(oconfig_item_t *ci)
-{
- int i;
-
- for (i = 0; i < ci->children_num; i++)
- {
- oconfig_item_t *child = ci->children + i;
-
- if (strcasecmp("Node", child->key) == 0)
- wt_config_tsd(child);
- else
- {
- ERROR("write_tsdb plugin: Invalid configuration "
- "option: %s.", child->key);
- }
- }
-
- return 0;
-}
-
-void module_register(void)
-{
- plugin_register_complex_config("write_tsdb", wt_config);
-}
-
-/* vim: set sw=4 ts=4 sts=4 tw=78 et : */
projects / collectd.git / commitdiff