[METRICS-383] write_tsdb plugin

diff --git a/configure.ac b/configure.ac
index 1399e79a586291945993bc5e1433eecbdf8e9b01..5282c42f037ef8ab46b9d05d58a0322051e52aff 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -5242,6 +5242,7 @@ AC_PLUGIN([write_http],  [$with_libcurl],      [HTTP output plugin])
 AC_PLUGIN([write_mongodb], [$with_libmongoc],  [MongoDB output plugin])
 AC_PLUGIN([write_redis], [$with_libcredis],    [Redis output plugin])
 AC_PLUGIN([write_riemann], [$have_protoc_c],   [Riemann output plugin])
+AC_PLUGIN([write_tsdb],  [yes],                [TSDB output plugin])
 AC_PLUGIN([xmms],        [$with_libxmms],      [XMMS statistics])
 AC_PLUGIN([zfs_arc],     [$plugin_zfs_arc],    [ZFS ARC statistics])
 
@@ -5586,6 +5587,7 @@ Configuration:
     write_mongodb . . . . $enable_write_mongodb
     write_redis . . . . . $enable_write_redis
     write_riemann . . . . $enable_write_riemann
+    write_tsdb  . . . . . $enable_write_tsdb
     xmms  . . . . . . . . $enable_xmms
     zfs_arc . . . . . . . $enable_zfs_arc
 

diff --git a/src/Makefile.am b/src/Makefile.am
index a9d858232a9ec547f42e52d335b1d3e5ff2da5eb..191ea4b2e473f6f79abeec82664dccabb15138cc 100644 (file)
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -1417,6 +1417,14 @@ collectd_LDADD += "-dlopen" write_riemann.la
 collectd_DEPENDENCIES += write_riemann.la
 endif
 
+if BUILD_PLUGIN_WRITE_TSDB
+pkglib_LTLIBRARIES += write_tsdb.la
+write_tsdb_la_SOURCES = write_tsdb.c
+write_tsdb_la_LDFLAGS = -module -avoid-version
+collectd_LDADD += "-dlopen" write_tsdb.la
+collectd_DEPENDENCIES += write_tsdb.la
+endif
+
 if BUILD_PLUGIN_XMMS
 pkglib_LTLIBRARIES += xmms.la
 xmms_la_SOURCES = xmms.c

diff --git a/src/collectd.conf.in b/src/collectd.conf.in
index 678cfb353df9a6baf5cbc50e2ec93aa3da46f941..26be4d3e3d65b92f63212404bd15a5caaa0c6180 100644 (file)
--- a/src/collectd.conf.in
+++ b/src/collectd.conf.in
@@ -182,6 +182,7 @@
 #@BUILD_PLUGIN_WRITE_MONGODB_TRUE@LoadPlugin write_mongodb
 #@BUILD_PLUGIN_WRITE_REDIS_TRUE@LoadPlugin write_redis
 #@BUILD_PLUGIN_WRITE_RIEMANN_TRUE@LoadPlugin write_riemann
+#@BUILD_PLUGIN_WRITE_TSDB_TRUE@LoadPlugin write_tsdb
 #@BUILD_PLUGIN_XMMS_TRUE@LoadPlugin xmms
 #@BUILD_PLUGIN_ZFS_ARC_TRUE@LoadPlugin zfs_arc
 
@@ -1187,6 +1188,14 @@
 #      Tag "foobar"
 #</Plugin>
 
+#<Plugin write_tsdb>
+#      <Node>
+#              Host "localhost"
+#              Port "4242"
+#              Prefix "sys"
+#      </Node>
+#</Plugin>
+
 ##############################################################################
 # Filter configuration                                                       #
 #----------------------------------------------------------------------------#

diff --git a/src/write_tsdb.c b/src/write_tsdb.c
new file mode 100644 (file)
index 0000000..7881f7a
--- /dev/null
+++ b/src/write_tsdb.c
@@ -0,0 +1,657 @@
+/**
+ * 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
+ *
+ * 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
+ *
+ * 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>
+ *
+ * Modified by Brett Hawn <bhawn at llnw.com> 
+ * Based on the write_graphite plugin.
+ **/
+
+ /* write_tsdb plugin configuation example
+  *
+  * <Plugin write_tsdb>
+  *   <Node>
+  *     Host "localhost"
+  *     Port "4242"
+  *     Prefix "sys"
+  *   </Node>
+  * </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 <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    *prefix;
+    char    *postfix;
+    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 (/* timeout = */ 0, cb);
+
+    close(cb->sock_fd);
+    cb->sock_fd = -1;
+
+    sfree(cb->node);
+    sfree(cb->service);
+    sfree(cb->prefix);
+    sfree(cb->postfix);
+
+    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)
+{
+    char *prefix;
+    char *postfix;
+
+    prefix = cb->prefix;
+    if (prefix == NULL)
+        prefix = "";
+
+    postfix = cb->postfix;
+    if (postfix == NULL)
+        postfix = "";
+
+    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);
+    }
+
+    return (0);
+}
+
+static int wt_send_message (const char* key, const char* value,
+        cdtime_t time, struct wt_callback *cb, const char* host)
+{
+    int status;
+    size_t message_len;
+    char message[1024];
+
+    /* skip if value is NaN */
+    if (value[0] == 'n')
+      return (0);
+
+    message_len = (size_t) ssnprintf (message, sizeof (message),
+            "put %s %u %s fqdn=%s\r\n",
+            key,
+            (unsigned int) CDTIME_T_TO_TIME_T (time),
+            value,
+           host);
+    if (message_len >= sizeof (message)) {
+        ERROR ("write_tsdb 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 = 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 (/* timeout = */ 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);
+        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->prefix = NULL;
+    cb->postfix = NULL;
+    cb->escape_char = WT_DEFAULT_ESCAPE;
+    cb->store_rates = 1;
+
+    pthread_mutex_init (&cb->send_lock, /* attr = */ 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 ("Prefix", child->key) == 0)
+            cf_util_get_string (child, &cb->prefix);
+        else if (strcasecmp ("Postfix", child->key) == 0)
+            cf_util_get_string (child, &cb->postfix);
+        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 : */