From cc4025b8c5561acb292e5fd025dfd4a2beb68165 Mon Sep 17 00:00:00 2001 From: Florian Forster Date: Mon, 17 Jun 2013 12:00:45 +0200 Subject: [PATCH] statsd plugin: Initial implementation. --- configure.in | 2 + src/Makefile.am | 9 + src/collectd.conf.in | 1 + src/statsd.c | 579 +++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 591 insertions(+) create mode 100644 src/statsd.c diff --git a/configure.in b/configure.in index 27c6cd31..3701d8ad 100644 --- a/configure.in +++ b/configure.in @@ -5099,6 +5099,7 @@ AC_PLUGIN([rrdtool], [$with_librrd], [RRDTool output plugin]) AC_PLUGIN([sensors], [$with_libsensors], [lm_sensors statistics]) AC_PLUGIN([serial], [$plugin_serial], [serial port traffic]) AC_PLUGIN([snmp], [$with_libnetsnmp], [SNMP querying plugin]) +AC_PLUGIN([statsd], [yes], [StatsD plugin]) AC_PLUGIN([swap], [$plugin_swap], [Swap usage statistics]) AC_PLUGIN([syslog], [$have_syslog], [Syslog logging plugin]) AC_PLUGIN([table], [yes], [Parsing of tabular data]) @@ -5436,6 +5437,7 @@ Configuration: sensors . . . . . . . $enable_sensors serial . . . . . . . $enable_serial snmp . . . . . . . . $enable_snmp + statsd . . . . . . . $enable_statsd swap . . . . . . . . $enable_swap syslog . . . . . . . $enable_syslog table . . . . . . . . $enable_table diff --git a/src/Makefile.am b/src/Makefile.am index c3e596d4..b443ae32 100644 --- a/src/Makefile.am +++ b/src/Makefile.am @@ -1069,6 +1069,15 @@ collectd_LDADD += "-dlopen" snmp.la collectd_DEPENDENCIES += snmp.la endif +if BUILD_PLUGIN_STATSD +pkglib_LTLIBRARIES += statsd.la +statsd_la_SOURCES = statsd.c +statsd_la_LDFLAGS = -module -avoid-version +statsd_la_LIBADD = -lpthread +collectd_LDADD += "-dlopen" statsd.la +collectd_DEPENDENCIES += statsd.la +endif + if BUILD_PLUGIN_SWAP pkglib_LTLIBRARIES += swap.la swap_la_SOURCES = swap.c diff --git a/src/collectd.conf.in b/src/collectd.conf.in index 4a88e664..7717bc34 100644 --- a/src/collectd.conf.in +++ b/src/collectd.conf.in @@ -150,6 +150,7 @@ #@BUILD_PLUGIN_SENSORS_TRUE@LoadPlugin sensors #@BUILD_PLUGIN_SERIAL_TRUE@LoadPlugin serial #@BUILD_PLUGIN_SNMP_TRUE@LoadPlugin snmp +#@BUILD_PLUGIN_STATSD_TRUE@LoadPlugin statsd #@BUILD_PLUGIN_SWAP_TRUE@LoadPlugin swap #@BUILD_PLUGIN_TABLE_TRUE@LoadPlugin table #@BUILD_PLUGIN_TAIL_TRUE@LoadPlugin tail diff --git a/src/statsd.c b/src/statsd.c new file mode 100644 index 00000000..896fb619 --- /dev/null +++ b/src/statsd.c @@ -0,0 +1,579 @@ +/** + * collectd - src/statsd.c + * + * Copyright (C) 2013 Florian octo Forster + * + * 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. + * + * Authors: + * Florian octo Forster + */ + +#include "collectd.h" +#include "plugin.h" +#include "common.h" +#include "configfile.h" +#include "utils_avltree.h" +#include "utils_complain.h" + +#include + +#include +#include +#include +#include + +#ifndef STATSD_DEFAULT_NODE +# define STATSD_DEFAULT_NODE NULL +#endif + +#ifndef STATSD_DEFAULT_SERVICE +# define STATSD_DEFAULT_SERVICE "8125" +#endif + +enum metric_type_e +{ + STATSD_COUNTER, + STATSD_TIMER, + STATSD_GAUGE +}; +typedef enum metric_type_e metric_type_t; + +struct statsd_metric_s +{ + metric_type_t type; + int64_t value; + cdtime_t last_update; +}; +typedef struct statsd_metric_s statsd_metric_t; + +static c_avl_tree_t *metrics_tree = NULL; +static pthread_mutex_t metrics_lock = PTHREAD_MUTEX_INITIALIZER; + +static pthread_t network_thread; +static _Bool network_thread_running = 0; +static _Bool network_thread_shutdown = 0; + +static char *conf_node = NULL; +static char *conf_service = NULL; + +/* Must hold metrics_lock when calling this function. */ +static int statsd_metric_set_unsafe (char const *name, int64_t value, /* {{{ */ + metric_type_t type) +{ + cdtime_t now; + statsd_metric_t *metric; + char *key; + int status; + + now = cdtime (); + + status = c_avl_get (metrics_tree, name, (void *) &metric); + if (status == 0) + { + metric->value = value; + metric->last_update = now; + + return (0); + } + + key = strdup (name); + metric = calloc (1, sizeof (*metric)); + if ((key == NULL) || (metric == NULL)) + { + sfree (key); + sfree (metric); + return (-1); + } + + metric->type = type; + metric->value = value; + metric->last_update = now; + + status = c_avl_insert (metrics_tree, key, metric); + if (status != 0) + { + sfree (key); + sfree (metric); + + return (-1); + } + + return (0); +} /* }}} int statsd_metric_set_unsafe */ + +static int statsd_metric_set (char const *name, int64_t value, /* {{{ */ + metric_type_t type) +{ + int status; + + pthread_mutex_lock (&metrics_lock); + status = statsd_metric_set_unsafe (name, value, type); + pthread_mutex_unlock (&metrics_lock); + + return (status); +} /* }}} int statsd_metric_set */ + +static int statsd_metric_add (char const *name, int64_t delta, /* {{{ */ + metric_type_t type) +{ + cdtime_t now; + statsd_metric_t *metric; + int status; + + now = cdtime (); + pthread_mutex_lock (&metrics_lock); + + status = c_avl_get (metrics_tree, name, (void *) &metric); + if (status == 0) + { + metric->value += delta; + metric->last_update = now; + + pthread_mutex_unlock (&metrics_lock); + return (0); + } + else /* no such value yet */ + { + status = statsd_metric_set_unsafe (name, delta, type); + + pthread_mutex_unlock (&metrics_lock); + return (status); + } +} /* }}} int statsd_metric_add */ + +static int statsd_handle_counter (char const *name, /* {{{ */ + char const *value_str, + char const *extra) +{ + value_t value; + value_t scale; + int status; + + if ((extra != NULL) && (extra[0] != '@')) + return (-1); + + scale.gauge = 1.0; + if (extra != NULL) + { + status = parse_value (extra + 1, &scale, DS_TYPE_GAUGE); + if (status != 0) + return (status); + + if (!isfinite (scale.gauge) || (scale.gauge <= 0.0) || (scale.gauge > 1.0)) + return (-1); + } + + value.derive = 1; + status = parse_value (value_str, &value, DS_TYPE_DERIVE); + if (status != 0) + return (status); + + if (value.derive < 1) + return (-1); + + return (statsd_metric_add (name, + (int64_t) (((gauge_t) value.derive) / scale.gauge), + STATSD_COUNTER)); +} /* }}} int statsd_handle_counter */ + +static int statsd_handle_gauge (char const *name, /* {{{ */ + char const *value_str) +{ + value_t value; + int status; + + value.derive = 0; + status = parse_value (value_str, &value, DS_TYPE_DERIVE); + if (status != 0) + return (status); + + if ((value_str[0] == '+') || (value_str[0] == '-')) + return (statsd_metric_add (name, (int64_t) value.derive, STATSD_GAUGE)); + else + return (statsd_metric_set (name, (int64_t) value.derive, STATSD_GAUGE)); +} /* }}} int statsd_handle_gauge */ + +static int statsd_handle_timer (char const *name, /* {{{ */ + char const *value_str) +{ + value_t value; + int status; + + value.derive = 0; + status = parse_value (value_str, &value, DS_TYPE_DERIVE); + if (status != 0) + return (status); + + return (statsd_metric_add (name, (int64_t) value.derive, STATSD_TIMER)); +} /* }}} int statsd_handle_timer */ + +static int statsd_handle_set (char const *name __attribute__((unused)), /* {{{ */ + char const *value_str __attribute__((unused))) +{ + static c_complain_t c = C_COMPLAIN_INIT_STATIC; + + c_complain (LOG_WARNING, &c, + "statsd plugin: Support for sets is not yet implemented."); + + return (0); +} /* }}} int statsd_handle_set */ + +static int statsd_parse_line (char *buffer) /* {{{ */ +{ + char *name = buffer; + char *value; + char *type; + char *extra; + + type = strchr (name, '|'); + if (type == NULL) + return (-1); + *type = 0; + type++; + + value = strrchr (name, ':'); + if (value == NULL) + return (-1); + *value = 0; + value++; + + extra = strchr (type, '|'); + if (extra != NULL) + { + *extra = 0; + extra++; + } + + if (strcmp ("c", type) == 0) + return (statsd_handle_counter (name, value, extra)); + + /* extra is only valid for counters */ + if (extra != NULL) + return (-1); + + if (strcmp ("g", type) == 0) + return (statsd_handle_gauge (name, value)); + else if (strcmp ("ms", type) == 0) + return (statsd_handle_timer (name, value)); + else if (strcmp ("s", type) == 0) + return (statsd_handle_set (name, value)); + else + return (-1); +} /* }}} void statsd_parse_line */ + +static void statsd_parse_buffer (char *buffer) /* {{{ */ +{ + char *dummy; + char *saveptr = NULL; + char *ptr; + + for (dummy = buffer; + (ptr = strtok_r (dummy, "\r\n", &saveptr)) != NULL; + dummy = NULL) + { + char *line_orig = sstrdup (ptr); + int status; + + status = statsd_parse_line (ptr); + if (status != 0) + ERROR ("statsd plugin: Unable to parse line: \"%s\"", line_orig); + + sfree (line_orig); + } +} /* }}} void statsd_parse_buffer */ + +static void statsd_network_read (int fd) /* {{{ */ +{ + char buffer[4096]; + size_t buffer_size; + ssize_t status; + + status = recv (fd, buffer, sizeof (buffer), /* flags = */ MSG_DONTWAIT); + if (status < 0) + { + char errbuf[1024]; + + if ((errno == EAGAIN) || (errno == EWOULDBLOCK)) + return; + + ERROR ("statsd plugin: recv(2) failed: %s", + sstrerror (errno, errbuf, sizeof (errbuf))); + return; + } + + buffer_size = (size_t) status; + if (buffer_size >= sizeof (buffer)) + buffer_size = sizeof (buffer) - 1; + buffer[buffer_size] = 0; + + statsd_parse_buffer (buffer); +} /* }}} void statsd_network_read */ + +static int statsd_network_init (struct pollfd **ret_fds, /* {{{ */ + size_t *ret_fds_num) +{ + struct pollfd *fds = NULL; + size_t fds_num = 0; + + struct addrinfo ai_hints; + struct addrinfo *ai_list = NULL; + struct addrinfo *ai_ptr; + int status; + + char const *node = (conf_node != NULL) ? conf_node : STATSD_DEFAULT_NODE; + char const *service = (conf_service != NULL) + ? conf_service : STATSD_DEFAULT_SERVICE; + + memset (&ai_hints, 0, sizeof (ai_hints)); + ai_hints.ai_flags = AI_PASSIVE; +#ifdef AI_ADDRCONFIG + ai_hints.ai_flags |= AI_ADDRCONFIG; +#endif + ai_hints.ai_family = AF_UNSPEC; + ai_hints.ai_socktype = SOCK_DGRAM; + + status = getaddrinfo (node, service, &ai_hints, &ai_list); + if (status != 0) + { + ERROR ("statsd plugin: getaddrinfo (\"%s\", \"%s\") failed: %s", + node, service, gai_strerror (status)); + return (status); + } + + for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next) + { + int fd; + struct pollfd *tmp; + + char dbg_node[NI_MAXHOST]; + char dbg_service[NI_MAXSERV]; + + fd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype, ai_ptr->ai_protocol); + if (fd < 0) + { + char errbuf[1024]; + ERROR ("statsd plugin: socket(2) failed: %s", + sstrerror (errno, errbuf, sizeof (errbuf))); + continue; + } + + getnameinfo (ai_ptr->ai_addr, ai_ptr->ai_addrlen, + dbg_node, sizeof (dbg_node), dbg_service, sizeof (dbg_service), + NI_DGRAM | NI_NUMERICHOST | NI_NUMERICSERV); + DEBUG ("statsd plugin: Trying to bind to [%s]:%s ...", dbg_node, dbg_service); + + status = bind (fd, ai_ptr->ai_addr, ai_ptr->ai_addrlen); + if (status != 0) + { + char errbuf[1024]; + ERROR ("statsd plugin: bind(2) failed: %s", + sstrerror (errno, errbuf, sizeof (errbuf))); + close (fd); + continue; + } + + tmp = realloc (fds, sizeof (*fds) * (fds_num + 1)); + if (tmp == NULL) + { + ERROR ("statsd plugin: realloc failed."); + continue; + } + fds = tmp; + tmp = fds + fds_num; + fds_num++; + + memset (tmp, 0, sizeof (*tmp)); + tmp->fd = fd; + tmp->events = POLLIN | POLLPRI; + } + + freeaddrinfo (ai_list); + + if (fds_num == 0) + { + ERROR ("statsd plugin: Unable to create listening socket for [%s]:%s.", + (node != NULL) ? node : "::", service); + return (ENOENT); + } + + *ret_fds = fds; + *ret_fds_num = fds_num; + return (0); +} /* }}} int statsd_network_init */ + +static void *statsd_network_thread (void *args) /* {{{ */ +{ + struct pollfd *fds = NULL; + size_t fds_num = 0; + int status; + size_t i; + + status = statsd_network_init (&fds, &fds_num); + if (status != 0) + { + ERROR ("statsd plugin: Unable to open listening sockets."); + pthread_exit ((void *) 0); + } + + while (!network_thread_shutdown) + { + status = poll (fds, (nfds_t) fds_num, /* timeout = */ -1); + if (status < 0) + { + char errbuf[1024]; + + if ((errno == EINTR) || (errno == EAGAIN)) + continue; + + ERROR ("statsd plugin: poll(2) failed: %s", + sstrerror (errno, errbuf, sizeof (errbuf))); + break; + } + + for (i = 0; i < fds_num; i++) + { + if ((fds[i].revents & (POLLIN | POLLPRI)) == 0) + continue; + + statsd_network_read (fds[i].fd); + fds[i].revents = 0; + } + } /* while (!network_thread_shutdown) */ + + /* Clean up */ + for (i = 0; i < fds_num; i++) + close (fds[i].fd); + sfree (fds); + + return ((void *) 0); +} /* }}} void *statsd_network_thread */ + +static int statsd_init (void) /* {{{ */ +{ + pthread_mutex_lock (&metrics_lock); + if (metrics_tree == NULL) + metrics_tree = c_avl_create ((void *) strcasecmp); + + if (!network_thread_running) + { + int status; + + status = pthread_create (&network_thread, + /* attr = */ NULL, + statsd_network_thread, + /* args = */ NULL); + if (status != 0) + { + char errbuf[1024]; + pthread_mutex_unlock (&metrics_lock); + ERROR ("statsd plugin: pthread_create failed: %s", + sstrerror (errno, errbuf, sizeof (errbuf))); + return (status); + } + } + network_thread_running = 1; + + pthread_mutex_unlock (&metrics_lock); + + return (0); +} /* }}} int statsd_init */ + +static int statsd_metric_submit (char const *name, /* {{{ */ + statsd_metric_t const *metric) +{ + value_t values[1]; + value_list_t vl = VALUE_LIST_INIT; + + if (metric->type == STATSD_GAUGE) + values[0].gauge = (gauge_t) metric->value; + else + values[0].derive = (derive_t) metric->value; + + vl.values = values; + vl.values_len = 1; + sstrncpy (vl.host, hostname_g, sizeof (vl.host)); + sstrncpy (vl.plugin, "statsd", sizeof (vl.plugin)); + + if (metric->type == STATSD_GAUGE) + sstrncpy (vl.type, "gauge", sizeof (vl.type)); + else if (metric->type == STATSD_TIMER) + sstrncpy (vl.type, "total_time_in_ms", sizeof (vl.type)); + else /* if (metric->type == STATSD_COUNTER) */ + sstrncpy (vl.type, "derive", sizeof (vl.type)); + + sstrncpy (vl.type_instance, name, sizeof (vl.type_instance)); + + return (plugin_dispatch_values (&vl)); +} /* }}} int statsd_metric_submit */ + +static int statsd_read (void) /* {{{ */ +{ + c_avl_iterator_t *i; + char *name; + statsd_metric_t *metric; + + pthread_mutex_lock (&metrics_lock); + + if (metrics_tree == NULL) + { + pthread_mutex_unlock (&metrics_lock); + return (0); + } + + i = c_avl_get_iterator (metrics_tree); + while (c_avl_iterator_next (i, (void *) &name, (void *) &metric) == 0) + statsd_metric_submit (name, metric); + c_avl_iterator_destroy (i); + + pthread_mutex_unlock (&metrics_lock); + + return (0); +} /* }}} int statsd_read */ + +static int statsd_shutdown (void) /* {{{ */ +{ + void *key; + void *value; + + pthread_mutex_lock (&metrics_lock); + + if (network_thread_running) + { + network_thread_shutdown = 1; + pthread_kill (network_thread, SIGTERM); + pthread_join (network_thread, /* retval = */ NULL); + } + network_thread_running = 0; + + while (c_avl_pick (metrics_tree, &key, &value) == 0) + { + sfree (key); + sfree (value); + } + c_avl_destroy (metrics_tree); + metrics_tree = NULL; + + pthread_mutex_unlock (&metrics_lock); + + return (0); +} /* }}} int statsd_shutdown */ + +void module_register (void) +{ + plugin_register_init ("statsd", statsd_init); + plugin_register_read ("statsd", statsd_read); + plugin_register_shutdown ("statsd", statsd_shutdown); +} + +/* vim: set sw=2 sts=2 et fdm=marker : */ -- 2.30.2