--- /dev/null
+/*
+ * collectd - src/write_riemann.c
+ *
+ * Copyright (C) 2012 Pierre-Yves Ritschard <pyr@spootnik.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
+ * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#include "collectd.h"
+#include "plugin.h"
+#include "common.h"
+#include "configfile.h"
+#include "utils_cache.h"
+#include "riemann.pb-c.h"
+
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include <errno.h>
+#include <netdb.h>
+#include <inttypes.h>
+#include <pthread.h>
+
+#define RIEMANN_HOST "localhost"
+#define RIEMANN_PORT "5555"
+
+struct riemann_host {
+ char *name;
+#define F_CONNECT 0x01
+ uint8_t flags;
+ pthread_mutex_t lock;
+ _Bool store_rates;
+ char *node;
+ char *service;
+ int s;
+
+ int reference_count;
+};
+
+static char **riemann_tags;
+static size_t riemann_tags_num;
+
+static int riemann_send(struct riemann_host *, Msg const *);
+static int riemann_notification(const notification_t *, user_data_t *);
+static int riemann_write(const data_set_t *, const value_list_t *, user_data_t *);
+static int riemann_connect(struct riemann_host *);
+static int riemann_disconnect (struct riemann_host *host);
+static void riemann_free(void *);
+static int riemann_config_node(oconfig_item_t *);
+static int riemann_config(oconfig_item_t *);
+void module_register(void);
+
+static void riemann_event_protobuf_free (Event *event) /* {{{ */
+{
+ if (event == NULL)
+ return;
+
+ sfree (event->state);
+ sfree (event->service);
+ sfree (event->host);
+ sfree (event->description);
+
+ strarray_free (event->tags, event->n_tags);
+ event->tags = NULL;
+ event->n_tags = 0;
+
+ sfree (event);
+} /* }}} void riemann_event_protobuf_free */
+
+static void riemann_msg_protobuf_free (Msg *msg) /* {{{ */
+{
+ size_t i;
+
+ if (msg == NULL)
+ return;
+
+ for (i = 0; i < msg->n_events; i++)
+ {
+ riemann_event_protobuf_free (msg->events[i]);
+ msg->events[i] = NULL;
+ }
+
+ sfree (msg->events);
+ msg->n_events = 0;
+
+ sfree (msg);
+} /* }}} void riemann_msg_protobuf_free */
+
+static int
+riemann_send(struct riemann_host *host, Msg const *msg)
+{
+ u_char *buffer;
+ size_t buffer_len;
+ int status;
+
+ pthread_mutex_lock (&host->lock);
+
+ status = riemann_connect (host);
+ if (status != 0)
+ {
+ pthread_mutex_unlock (&host->lock);
+ return status;
+ }
+
+ buffer_len = msg__get_packed_size(msg);
+ buffer = malloc (buffer_len);
+ if (buffer == NULL) {
+ pthread_mutex_unlock (&host->lock);
+ ERROR ("write_riemann plugin: malloc failed.");
+ return ENOMEM;
+ }
+ memset (buffer, 0, buffer_len);
+
+ msg__pack(msg, buffer);
+
+ status = (int) swrite (host->s, buffer, buffer_len);
+ if (status != 0)
+ {
+ char errbuf[1024];
+
+ riemann_disconnect (host);
+ pthread_mutex_unlock (&host->lock);
+
+ ERROR ("write_riemann plugin: Sending to Riemann at %s:%s failed: %s",
+ (host->node != NULL) ? host->node : RIEMANN_HOST,
+ (host->service != NULL) ? host->service : RIEMANN_PORT,
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+ sfree (buffer);
+ return -1;
+ }
+
+ pthread_mutex_unlock (&host->lock);
+ sfree (buffer);
+ return 0;
+}
+
+static int riemann_event_add_tag (Event *event, /* {{{ */
+ char const *format, ...)
+{
+ va_list ap;
+ char buffer[1024];
+ size_t ret;
+
+ va_start (ap, format);
+ ret = vsnprintf (buffer, sizeof (buffer), format, ap);
+ if (ret >= sizeof (buffer))
+ ret = sizeof (buffer) - 1;
+ buffer[ret] = 0;
+ va_end (ap);
+
+ return (strarray_add (&event->tags, &event->n_tags, buffer));
+} /* }}} int riemann_event_add_tag */
+
+static Msg *riemann_notification_to_protobuf (struct riemann_host *host, /* {{{ */
+ notification_t const *n)
+{
+ Msg *msg;
+ Event *event;
+ char service_buffer[6 * DATA_MAX_NAME_LEN];
+ char const *severity;
+ notification_meta_t *meta;
+ int i;
+
+ msg = malloc (sizeof (*msg));
+ if (msg == NULL)
+ {
+ ERROR ("write_riemann plugin: malloc failed.");
+ return (NULL);
+ }
+ memset (msg, 0, sizeof (*msg));
+ msg__init (msg);
+
+ msg->events = malloc (sizeof (*msg->events));
+ if (msg->events == NULL)
+ {
+ ERROR ("write_riemann plugin: malloc failed.");
+ sfree (msg);
+ return (NULL);
+ }
+
+ event = malloc (sizeof (*event));
+ if (event == NULL)
+ {
+ ERROR ("write_riemann plugin: malloc failed.");
+ sfree (msg->events);
+ sfree (msg);
+ return (NULL);
+ }
+ memset (event, 0, sizeof (*event));
+ event__init (event);
+
+ msg->events[0] = event;
+ msg->n_events = 1;
+
+ event->host = strdup (n->host);
+ event->time = CDTIME_T_TO_TIME_T (n->time);
+ event->has_time = 1;
+
+ switch (n->severity)
+ {
+ case NOTIF_OKAY: severity = "okay"; break;
+ case NOTIF_WARNING: severity = "warning"; break;
+ case NOTIF_FAILURE: severity = "failure"; break;
+ default: severity = "unknown";
+ }
+ event->state = strdup (severity);
+
+ riemann_event_add_tag (event, "notification");
+ if (n->plugin[0] != 0)
+ riemann_event_add_tag (event, "plugin:%s", n->plugin);
+ if (n->plugin_instance[0] != 0)
+ riemann_event_add_tag (event, "plugin_instance:%s",
+ n->plugin_instance);
+
+ if (n->type[0] != 0)
+ riemann_event_add_tag (event, "type:%s", n->type);
+ if (n->type_instance[0] != 0)
+ riemann_event_add_tag (event, "type_instance:%s",
+ n->type_instance);
+
+ for (i = 0; i < riemann_tags_num; i++)
+ riemann_event_add_tag (event, "%s", riemann_tags[i]);
+
+ /* TODO: Use FORMAT_VL() here. */
+ ssnprintf (service_buffer, sizeof(service_buffer),
+ "%s-%s-%s-%s", n->plugin, n->plugin_instance,
+ n->type, n->type_instance);
+ event->service = strdup (service_buffer);
+
+ /* Pull in values from threshold */
+ for (meta = n->meta; meta != NULL; meta = meta->next)
+ {
+ if (strcasecmp ("CurrentValue", meta->name) != 0)
+ continue;
+
+ event->metric_d = meta->nm_value.nm_double;
+ event->has_metric_d = 1;
+ break;
+ }
+
+ DEBUG ("write_riemann plugin: Successfully created protobuf for notification: "
+ "host = \"%s\", service = \"%s\", state = \"%s\"",
+ event->host, event->service, event->state);
+ return (msg);
+} /* }}} Msg *riemann_notification_to_protobuf */
+
+static Event *riemann_value_to_protobuf (struct riemann_host const *host, /* {{{ */
+ data_set_t const *ds,
+ value_list_t const *vl, size_t index,
+ gauge_t const *rates)
+{
+ Event *event;
+ char service_buffer[6 * DATA_MAX_NAME_LEN];
+ int i;
+
+ event = malloc (sizeof (*event));
+ if (event == NULL)
+ {
+ ERROR ("write_riemann plugin: malloc failed.");
+ return (NULL);
+ }
+ memset (event, 0, sizeof (*event));
+ event__init (event);
+
+ event->host = strdup (vl->host);
+ event->time = CDTIME_T_TO_TIME_T (vl->time);
+ event->has_time = 1;
+ event->ttl = CDTIME_T_TO_TIME_T (2 * vl->interval);
+ event->has_ttl = 1;
+
+ riemann_event_add_tag (event, "plugin:%s", vl->plugin);
+ if (vl->plugin_instance[0] != 0)
+ riemann_event_add_tag (event, "plugin_instance:%s",
+ vl->plugin_instance);
+
+ riemann_event_add_tag (event, "type:%s", vl->type);
+ if (vl->type_instance[0] != 0)
+ riemann_event_add_tag (event, "type_instance:%s",
+ vl->type_instance);
+
+ if ((ds->ds[index].type != DS_TYPE_GAUGE) && (rates != NULL))
+ {
+ riemann_event_add_tag (event, "ds_type:%s:rate",
+ DS_TYPE_TO_STRING(ds->ds[index].type));
+ }
+ else
+ {
+ riemann_event_add_tag (event, "ds_type:%s",
+ DS_TYPE_TO_STRING(ds->ds[index].type));
+ }
+ riemann_event_add_tag (event, "ds_name:%s", ds->ds[index].name);
+ riemann_event_add_tag (event, "ds_index:%zu", index);
+
+ for (i = 0; i < riemann_tags_num; i++)
+ riemann_event_add_tag (event, "%s", riemann_tags[i]);
+
+ if (ds->ds[index].type == DS_TYPE_GAUGE)
+ {
+ event->has_metric_d = 1;
+ event->metric_d = (double) vl->values[index].gauge;
+ }
+ else if (rates != NULL)
+ {
+ event->has_metric_d = 1;
+ event->metric_d = (double) rates[index];
+ }
+ else
+ {
+ event->has_metric_sint64 = 1;
+ if (ds->ds[index].type == DS_TYPE_DERIVE)
+ event->metric_sint64 = (int64_t) vl->values[index].derive;
+ else if (ds->ds[index].type == DS_TYPE_ABSOLUTE)
+ event->metric_sint64 = (int64_t) vl->values[index].absolute;
+ else
+ event->metric_sint64 = (int64_t) vl->values[index].counter;
+ }
+
+ /* TODO: Use FORMAT_VL() here. */
+ ssnprintf (service_buffer, sizeof(service_buffer),
+ "%s-%s-%s-%s-%s", vl->plugin, vl->plugin_instance,
+ vl->type, vl->type_instance, ds->ds[index].name);
+ event->service = strdup (service_buffer);
+
+ DEBUG ("write_riemann plugin: Successfully created protobuf for metric: "
+ "host = \"%s\", service = \"%s\"",
+ event->host, event->service);
+ return (event);
+} /* }}} Event *riemann_value_to_protobuf */
+
+static Msg *riemann_value_list_to_protobuf (struct riemann_host const *host, /* {{{ */
+ data_set_t const *ds,
+ value_list_t const *vl)
+{
+ Msg *msg;
+ size_t i;
+ gauge_t *rates = NULL;
+
+ /* Initialize the Msg structure. */
+ msg = malloc (sizeof (*msg));
+ if (msg == NULL)
+ {
+ ERROR ("write_riemann plugin: malloc failed.");
+ return (NULL);
+ }
+ memset (msg, 0, sizeof (*msg));
+ msg__init (msg);
+
+ /* Set up events. First, the list of pointers. */
+ msg->n_events = (size_t) vl->values_len;
+ msg->events = calloc (msg->n_events, sizeof (*msg->events));
+ if (msg->events == NULL)
+ {
+ ERROR ("write_riemann plugin: calloc failed.");
+ riemann_msg_protobuf_free (msg);
+ return (NULL);
+ }
+
+ if (host->store_rates)
+ {
+ rates = uc_get_rate (ds, vl);
+ if (rates == NULL)
+ {
+ ERROR ("write_riemann plugin: uc_get_rate failed.");
+ riemann_msg_protobuf_free (msg);
+ return (NULL);
+ }
+ }
+
+ for (i = 0; i < msg->n_events; i++)
+ {
+ msg->events[i] = riemann_value_to_protobuf (host, ds, vl,
+ (int) i, rates);
+ if (msg->events[i] == NULL)
+ {
+ riemann_msg_protobuf_free (msg);
+ sfree (rates);
+ return (NULL);
+ }
+ }
+
+ sfree (rates);
+ return (msg);
+} /* }}} Msg *riemann_value_list_to_protobuf */
+
+static int
+riemann_notification(const notification_t *n, user_data_t *ud)
+{
+ int status;
+ struct riemann_host *host = ud->data;
+ Msg *msg;
+
+ msg = riemann_notification_to_protobuf (host, n);
+ if (msg == NULL)
+ return (-1);
+
+ status = riemann_send (host, msg);
+ if (status != 0)
+ ERROR ("write_riemann plugin: riemann_send failed with status %i",
+ status);
+
+ riemann_msg_protobuf_free (msg);
+ return (status);
+} /* }}} int riemann_notification */
+
+static int
+riemann_write(const data_set_t *ds,
+ const value_list_t *vl,
+ user_data_t *ud)
+{
+ int status;
+ struct riemann_host *host = ud->data;
+ Msg *msg;
+
+ msg = riemann_value_list_to_protobuf (host, ds, vl);
+ if (msg == NULL)
+ return (-1);
+
+ status = riemann_send (host, msg);
+ if (status != 0)
+ ERROR ("write_riemann plugin: riemann_send failed with status %i",
+ status);
+
+ riemann_msg_protobuf_free (msg);
+ return status;
+}
+
+/* host->lock must be held when calling this function. */
+static int
+riemann_connect(struct riemann_host *host)
+{
+ int e;
+ struct addrinfo *ai, *res, hints;
+ char const *node;
+ char const *service;
+
+ if (host->flags & F_CONNECT)
+ return 0;
+
+ memset(&hints, 0, sizeof(hints));
+ memset(&service, 0, sizeof(service));
+ hints.ai_family = PF_UNSPEC;
+ hints.ai_socktype = SOCK_DGRAM;
+#ifdef AI_ADDRCONFIG
+ hints.ai_flags |= AI_ADDRCONFIG;
+#endif
+
+ node = (host->node != NULL) ? host->node : RIEMANN_HOST;
+ service = (host->service != NULL) ? host->service : RIEMANN_PORT;
+
+ if ((e = getaddrinfo(node, service, &hints, &res)) != 0) {
+ ERROR ("write_riemann plugin: Unable to resolve host \"%s\": %s",
+ node, gai_strerror(e));
+ return -1;
+ }
+
+ host->s = -1;
+ for (ai = res; ai != NULL; ai = ai->ai_next) {
+ if ((host->s = socket(ai->ai_family,
+ ai->ai_socktype,
+ ai->ai_protocol)) == -1) {
+ continue;
+ }
+
+ if (connect(host->s, ai->ai_addr, ai->ai_addrlen) != 0) {
+ close(host->s);
+ host->s = -1;
+ continue;
+ }
+
+ host->flags |= F_CONNECT;
+ DEBUG("write_riemann plugin: got a succesful connection for: %s:%s",
+ node, service);
+ break;
+ }
+
+ freeaddrinfo(res);
+
+ if (host->s < 0) {
+ WARNING("write_riemann plugin: Unable to connect to Riemann at %s:%s",
+ node, service);
+ return -1;
+ }
+ return 0;
+}
+
+/* host->lock must be held when calling this function. */
+static int
+riemann_disconnect (struct riemann_host *host)
+{
+ if ((host->flags & F_CONNECT) == 0)
+ return (0);
+
+ close (host->s);
+ host->s = -1;
+ host->flags &= ~F_CONNECT;
+
+ return (0);
+}
+
+static void
+riemann_free(void *p)
+{
+ struct riemann_host *host = p;
+
+ if (host == NULL)
+ return;
+
+ pthread_mutex_lock (&host->lock);
+
+ host->reference_count--;
+ if (host->reference_count > 0)
+ {
+ pthread_mutex_unlock (&host->lock);
+ return;
+ }
+
+ riemann_disconnect (host);
+
+ sfree(host->service);
+ pthread_mutex_destroy (&host->lock);
+ sfree(host);
+}
+
+static int
+riemann_config_node(oconfig_item_t *ci)
+{
+ struct riemann_host *host = NULL;
+ int status = 0;
+ int i;
+ oconfig_item_t *child;
+ char callback_name[DATA_MAX_NAME_LEN];
+ user_data_t ud;
+
+ if ((host = calloc(1, sizeof (*host))) == NULL) {
+ ERROR ("write_riemann plugin: calloc failed.");
+ return ENOMEM;
+ }
+ pthread_mutex_init (&host->lock, NULL);
+ host->reference_count = 1;
+ host->node = NULL;
+ host->service = NULL;
+ host->store_rates = 1;
+
+ status = cf_util_get_string (ci, &host->name);
+ if (status != 0) {
+ WARNING("write_riemann plugin: Required host name is missing.");
+ riemann_free (host);
+ return -1;
+ }
+
+ for (i = 0; i < ci->children_num; i++) {
+ /*
+ * The code here could be simplified but makes room
+ * for easy adding of new options later on.
+ */
+ child = &ci->children[i];
+ status = 0;
+
+ if (strcasecmp ("Host", child->key) == 0) {
+ status = cf_util_get_string (child, &host->node);
+ if (status != 0)
+ break;
+ } else if (strcasecmp ("Port", child->key) == 0) {
+ status = cf_util_get_service (child, &host->service);
+ if (status != 0) {
+ ERROR ("write_riemann plugin: Invalid argument "
+ "configured for the \"Port\" "
+ "option.");
+ break;
+ }
+ } else if (strcasecmp ("StoreRates", child->key) == 0) {
+ status = cf_util_get_boolean (ci, &host->store_rates);
+ if (status != 0)
+ break;
+ } else {
+ WARNING("write_riemann plugin: ignoring unknown config "
+ "option: \"%s\"", child->key);
+ }
+ }
+ if (status != 0) {
+ riemann_free (host);
+ return status;
+ }
+
+ ssnprintf (callback_name, sizeof (callback_name), "write_riemann/%s",
+ host->name);
+ ud.data = host;
+ ud.free_func = riemann_free;
+
+ pthread_mutex_lock (&host->lock);
+
+ status = plugin_register_write (callback_name, riemann_write, &ud);
+ if (status != 0)
+ WARNING ("write_riemann plugin: plugin_register_write (\"%s\") "
+ "failed with status %i.",
+ callback_name, status);
+ else /* success */
+ host->reference_count++;
+
+ status = plugin_register_notification (callback_name,
+ riemann_notification, &ud);
+ if (status != 0)
+ WARNING ("write_riemann plugin: plugin_register_notification (\"%s\") "
+ "failed with status %i.",
+ callback_name, status);
+ else /* success */
+ host->reference_count++;
+
+ if (host->reference_count <= 1)
+ {
+ /* Both callbacks failed => free memory.
+ * We need to unlock here, because riemann_free() will lock.
+ * This is not a race condition, because we're the only one
+ * holding a reference. */
+ pthread_mutex_unlock (&host->lock);
+ riemann_free (host);
+ return (-1);
+ }
+
+ host->reference_count--;
+ pthread_mutex_unlock (&host->lock);
+
+ return status;
+}
+
+static int
+riemann_config(oconfig_item_t *ci)
+{
+ int i;
+ oconfig_item_t *child;
+ int status;
+
+ for (i = 0; i < ci->children_num; i++) {
+ child = &ci->children[i];
+
+ if (strcasecmp("Node", child->key) == 0) {
+ riemann_config_node (child);
+ } else if (strcasecmp(child->key, "tag") == 0) {
+ char *tmp = NULL;
+ status = cf_util_get_string(child, &tmp);
+ if (status != 0)
+ continue;
+
+ strarray_add (&riemann_tags, &riemann_tags_num, tmp);
+ DEBUG("write_riemann plugin: Got tag: %s", tmp);
+ sfree (tmp);
+ } else {
+ WARNING ("write_riemann plugin: Ignoring unknown "
+ "configuration option \"%s\" at top level.",
+ child->key);
+ }
+ }
+ return (0);
+}
+
+void
+module_register(void)
+{
+ plugin_register_complex_config ("write_riemann", riemann_config);
+}
+
+/* vim: set sw=8 sts=8 ts=8 noet : */
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