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afmongodb.c
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afmongodb.c
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/*
* Copyright (c) 2010-2016 Balabit
* Copyright (c) 2010-2014 Gergely Nagy <algernon@balabit.hu>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation, or (at your option) any later version.
*
* 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
*
* As an additional exemption you are allowed to compile & link against the
* OpenSSL libraries as published by the OpenSSL project. See the file
* COPYING for details.
*
*/
#include "afmongodb.h"
#include "afmongodb-parser.h"
#include "afmongodb-worker.h"
#include "apphook.h"
#include "messages.h"
#include "stats/stats-registry.h"
#include "plugin.h"
#include "plugin-types.h"
#include "syslog-ng.h"
#include <time.h>
#include "afmongodb-private.h"
#define DEFAULT_URI \
"mongodb://127.0.0.1:27017/syslog"\
"?wtimeoutMS=60000&socketTimeoutMS=60000&connectTimeoutMS=60000"
#define DEFAULT_SERVER_SELECTION_TIMEOUT 3000
/*
* Configuration
*/
LogTemplateOptions *
afmongodb_dd_get_template_options(LogDriver *s)
{
MongoDBDestDriver *self = (MongoDBDestDriver *)s;
return &self->template_options;
}
void
afmongodb_dd_set_uri(LogDriver *d, const gchar *uri)
{
MongoDBDestDriver *self = (MongoDBDestDriver *)d;
if (self->uri_str)
g_string_assign(self->uri_str, uri);
else
self->uri_str = g_string_new(uri);
}
void
afmongodb_dd_set_collection(LogDriver *d, LogTemplate *collection_template)
{
MongoDBDestDriver *self = (MongoDBDestDriver *)d;
log_template_unref(self->collection_template);
self->collection_template = collection_template;
self->collection_is_literal_string = log_template_is_literal_string(self->collection_template);
}
void
afmongodb_dd_set_value_pairs(LogDriver *d, ValuePairs *vp)
{
MongoDBDestDriver *self = (MongoDBDestDriver *)d;
value_pairs_unref(self->vp);
self->vp = vp;
}
void afmongodb_dd_set_bulk(LogDriver *d, gboolean bulk)
{
MongoDBDestDriver *self = (MongoDBDestDriver *)d;
self->use_bulk = bulk;
}
void
afmongodb_dd_set_bulk_unordered(LogDriver *d, gboolean unordered)
{
MongoDBDestDriver *self = (MongoDBDestDriver *)d;
self->bulk_unordered = unordered;
}
void
afmongodb_dd_set_bulk_bypass_validation(LogDriver *d, gboolean bypass_validation)
{
MongoDBDestDriver *self = (MongoDBDestDriver *)d;
self->bulk_bypass_validation = bypass_validation;
}
void
afmongodb_dd_set_write_concern(LogDriver *d, int32_t write_concern_level)
{
MongoDBDestDriver *self = (MongoDBDestDriver *)d;
self->write_concern_level = write_concern_level;
}
/*
* Utilities
*/
static gchar *
_format_instance_id(const LogThreadedDestDriver *d, const gchar *format, StatsClusterKeyBuilder *kb)
{
const MongoDBDestDriver *self = (const MongoDBDestDriver *)d;
const gchar *first_host = "";
const gchar *db;
const gchar *replica_set;
const gchar *coll;
if (kb || !((LogPipe *)d)->persist_name)
{
const mongoc_host_list_t *hosts = mongoc_uri_get_hosts(self->uri_obj);
if (hosts)
{
if (hosts->family == AF_UNIX)
first_host = hosts->host;
else
first_host = hosts->host_and_port;
}
db = self->const_db ? self->const_db : "";
replica_set = mongoc_uri_get_replica_set(self->uri_obj);
if (!replica_set)
replica_set = "";
coll = self->collection_template->template_str ? self->collection_template->template_str : "";
}
if (kb)
{
stats_cluster_key_builder_add_legacy_label(kb, stats_cluster_label("driver", "mongodb"));
stats_cluster_key_builder_add_legacy_label(kb, stats_cluster_label("host", first_host));
stats_cluster_key_builder_add_legacy_label(kb, stats_cluster_label("database", db));
stats_cluster_key_builder_add_legacy_label(kb, stats_cluster_label("replica_set", replica_set));
stats_cluster_key_builder_add_legacy_label(kb, stats_cluster_label("collection", coll));
}
static gchar args[1024];
static gchar id[1024];
if (((LogPipe *)d)->persist_name)
{
g_snprintf(args, sizeof(args), "%s", ((LogPipe *)d)->persist_name);
}
else
{
g_snprintf(args, sizeof(args), "%s,%s,%s,%s", first_host, db, replica_set, coll);
}
g_snprintf(id, sizeof(id), format, args);
return id;
}
static const gchar *
_format_stats_key(LogThreadedDestDriver *d, StatsClusterKeyBuilder *kb)
{
return _format_instance_id(d, "mongodb,%s", kb);
}
static const gchar *
_format_persist_name(const LogPipe *s)
{
const LogThreadedDestDriver *self = (const LogThreadedDestDriver *)s;
return s->persist_name ? _format_instance_id(self, "afmongodb.%s", NULL)
: _format_instance_id(self, "afmongodb(%s)", NULL);
}
static inline void
_uri_set_default_server_selection_timeout(mongoc_uri_t *uri_obj)
{
#if SYSLOG_NG_HAVE_DECL_MONGOC_URI_SET_OPTION_AS_INT32 && SYSLOG_NG_HAVE_DECL_MONGOC_URI_SERVERSELECTIONTIMEOUTMS
gint32 server_selection_timeout = mongoc_uri_get_option_as_int32(uri_obj, MONGOC_URI_SERVERSELECTIONTIMEOUTMS,
DEFAULT_SERVER_SELECTION_TIMEOUT);
mongoc_uri_set_option_as_int32(uri_obj, MONGOC_URI_SERVERSELECTIONTIMEOUTMS, server_selection_timeout);
#endif
}
gboolean
afmongodb_dd_private_uri_init(LogDriver *d)
{
MongoDBDestDriver *self = (MongoDBDestDriver *)d;
if (!self->uri_str)
self->uri_str = g_string_new(DEFAULT_URI);
self->uri_obj = mongoc_uri_new(self->uri_str->str);
if (!self->uri_obj)
{
msg_error("Error parsing MongoDB URI",
evt_tag_str("uri", self->uri_str->str),
evt_tag_str("driver", self->super.super.super.id));
return FALSE;
}
_uri_set_default_server_selection_timeout(self->uri_obj);
self->const_db = mongoc_uri_get_database(self->uri_obj);
if (!self->const_db || !strlen(self->const_db))
{
msg_error("Missing DB name from MongoDB URI",
evt_tag_str("uri", self->uri_str->str),
evt_tag_str("driver", self->super.super.super.id));
return FALSE;
}
msg_verbose("Initializing MongoDB destination",
evt_tag_str("uri", self->uri_str->str),
evt_tag_str("db", self->const_db),
evt_tag_str("collection", self->collection_template->template_str),
evt_tag_str("driver", self->super.super.super.id));
return TRUE;
}
gboolean
afmongodb_dd_client_pool_init(MongoDBDestDriver *self)
{
self->pool = mongoc_client_pool_new(self->uri_obj);
if (!self->pool)
return FALSE;
mongoc_client_pool_max_size(self->pool, self->super.num_workers);
return TRUE;
}
/*
* Main thread
*/
static void
_init_value_pairs_dot_to_underscore_transformation(MongoDBDestDriver *self)
{
ValuePairsTransformSet *vpts;
/* Always replace a leading dot with an underscore. */
vpts = value_pairs_transform_set_new(".*");
value_pairs_transform_set_add_func(vpts, value_pairs_new_transform_replace_prefix(".", "_"));
value_pairs_add_transforms(self->vp, vpts);
}
static gboolean
_init(LogPipe *s)
{
MongoDBDestDriver *self = (MongoDBDestDriver *)s;
GlobalConfig *cfg = log_pipe_get_config(s);
log_template_options_init(&self->template_options, cfg);
_init_value_pairs_dot_to_underscore_transformation(self);
if (!afmongodb_dd_private_uri_init(&self->super.super.super))
return FALSE;
if (!afmongodb_dd_client_pool_init(self))
return FALSE;
if (!log_threaded_dest_driver_init_method(s))
return FALSE;
if (cfg_is_config_version_older(cfg, VERSION_VALUE_4_0) &&
!value_pairs_is_cast_to_strings_explicit(self->vp))
{
if (cfg_is_typing_feature_enabled(cfg))
{
msg_warning("WARNING: the mongodb() destination starts using type information "
"associated with name-value pairs in " VERSION_4_0
". This can possibly cause fields in the BSON "
"document to change types if no explicit type hint is "
"specified. This change will cause the type in the output "
"document match the original type that was parsed "
"using json-parser(), add cast(yes) option to mongodb() "
"to keep using strings instead of typed values",
log_pipe_location_tag(s));
}
value_pairs_set_cast_to_strings(self->vp, TRUE);
}
return TRUE;
}
static gboolean
_deinit(LogPipe *s)
{
MongoDBDestDriver *self = (MongoDBDestDriver *)s;
if(!log_threaded_dest_driver_deinit_method(s))
return FALSE;
if (self->pool)
mongoc_client_pool_destroy(self->pool);
if (self->uri_obj)
mongoc_uri_destroy(self->uri_obj);
return TRUE;
}
static void
_free(LogPipe *d)
{
MongoDBDestDriver *self = (MongoDBDestDriver *)d;
log_template_options_destroy(&self->template_options);
if (self->uri_str)
{
g_string_free(self->uri_str, TRUE);
self->uri_str = NULL;
}
log_template_unref(self->collection_template);
value_pairs_unref(self->vp);
log_threaded_dest_driver_free(d);
}
/*
* Plugin glue.
*/
static void
afmongodb_global_init(void)
{
mongoc_init();
}
static void
afmongodb_global_deinit(void)
{
mongoc_cleanup();
}
static void
afmongodb_register_global_initializers(void)
{
static gboolean initialized = FALSE;
if (!initialized)
{
register_application_hook(AH_STARTUP, (ApplicationHookFunc) afmongodb_global_init, NULL, AHM_RUN_ONCE);
register_application_hook(AH_SHUTDOWN, (ApplicationHookFunc) afmongodb_global_deinit, NULL, AHM_RUN_ONCE);
initialized = TRUE;
}
}
LogDriver *
afmongodb_dd_new(GlobalConfig *cfg)
{
MongoDBDestDriver *self = g_new0(MongoDBDestDriver, 1);
afmongodb_register_global_initializers();
log_threaded_dest_driver_init_instance(&self->super, cfg);
self->super.super.super.super.init = _init;
self->super.super.super.super.deinit = _deinit;
self->super.super.super.super.free_fn = _free;
self->super.super.super.super.generate_persist_name = _format_persist_name;
self->super.format_stats_key = _format_stats_key;
self->super.stats_source = stats_register_type("mongodb");
self->super.worker.construct = afmongodb_dw_new;
LogTemplate *template = log_template_new(cfg, NULL);
log_template_compile_literal_string(template, "messages");
afmongodb_dd_set_collection(&self->super.super.super, template);
log_template_options_defaults(&self->template_options);
ValuePairs *vp = value_pairs_new_default(cfg);
value_pairs_set_include_bytes(vp, TRUE);
afmongodb_dd_set_value_pairs(&self->super.super.super, vp);
self->use_bulk = TRUE;
self->bulk_unordered = FALSE;
self->bulk_bypass_validation = FALSE;
self->write_concern_level = MONGOC_WRITE_CONCERN_W_DEFAULT;
return &self->super.super.super;
}
extern CfgParser afmongodb_dd_parser;
static Plugin afmongodb_plugin =
{
.type = LL_CONTEXT_DESTINATION,
.name = "mongodb",
.parser = &afmongodb_parser,
};
gboolean
afmongodb_module_init(PluginContext *context, CfgArgs *args)
{
plugin_register(context, &afmongodb_plugin, 1);
return TRUE;
}
const ModuleInfo module_info =
{
.canonical_name = "afmongodb",
.version = SYSLOG_NG_VERSION,
.description = "The afmongodb module provides MongoDB destination support for syslog-ng.",
.core_revision = SYSLOG_NG_SOURCE_REVISION,
.plugins = &afmongodb_plugin,
.plugins_len = 1,
};