--- /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;
+
+ _Bool store_rates;
+ _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 *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_len = ssnprintf (message,
+ sizeof(message),
+ "put %s %.0f %s fqdn=%s %s %s\r\n",
+ key,
+ CDTIME_T_TO_DOUBLE(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 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->store_rates = 0;
+
+ 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("AlwaysAppendDS", child->key) == 0)
+ cf_util_get_boolean(child, &cb->always_append_ds);
+ 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 : */
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