From: Doug MacEachern Date: Wed, 6 May 2009 06:14:42 +0000 (-0700) Subject: couchdb plugin: Add plugin to fetch data from a CouchDB and parse its contents. X-Git-Tag: collectd-4.7.0~1 X-Git-Url: https://git.tokkee.org/?a=commitdiff_plain;h=bc51ef217e871b80152eccd4e5f32659500f75f3;p=collectd.git couchdb plugin: Add plugin to fetch data from a CouchDB and parse its contents. Signed-off-by: Doug MacEachern Signed-off-by: Florian Forster --- diff --git a/README b/README index a1bf5ff2..e47493ac 100644 --- a/README +++ b/README @@ -43,6 +43,9 @@ Features - conntrack Number of nf_conntrack entries. + - couchdb + Parse statistics from CouchDB JSON documents. + - cpu CPU utilization: Time spent in the system, user, nice, idle, and related states. @@ -518,6 +521,9 @@ Prerequisites * libxmms (optional) + * libyajl (optional) + Parse JSON data. This is needed for the `couchdb' plugin. + Configuring / Compiling / Installing ------------------------------------ diff --git a/configure.in b/configure.in index 3770910f..07a4e298 100644 --- a/configure.in +++ b/configure.in @@ -2904,6 +2904,57 @@ AC_DEFINE_UNQUOTED(HAVE_LIBXMMS, [$with_libxmms_numeric], [Define to 1 if you ha AM_CONDITIONAL(BUILD_WITH_LIBXMMS, test "x$with_libxmms" = "xyes") # }}} +# --with-libyajl {{{ +with_libyajl_cppflags="" +with_libyajl_ldflags="" +AC_ARG_WITH(libyajl, [AS_HELP_STRING([--with-libyajl@<:@=PREFIX@:>@], [Path to libyajl.])], +[ + if test "x$withval" != "xno" && test "x$withval" != "xyes" + then + with_libyajl_cppflags="-I$withval/include" + with_libyajl_ldflags="-L$withval/lib" + with_libyajl="yes" + else + with_libyajl="$withval" + fi +], +[ + with_libyajl="yes" +]) +if test "x$with_libyajl" = "xyes" +then + SAVE_CPPFLAGS="$CPPFLAGS" + CPPFLAGS="$CPPFLAGS $with_libyajl_cppflags" + + AC_CHECK_HEADERS(yajl/yajl_parse.h, [with_libyajl="yes"], [with_libyajl="no (yajl/yajl_parse.h not found)"]) + + CPPFLAGS="$SAVE_CPPFLAGS" +fi +if test "x$with_libyajl" = "xyes" +then + SAVE_CPPFLAGS="$CPPFLAGS" + SAVE_LDFLAGS="$LDFLAGS" + CPPFLAGS="$CPPFLAGS $with_libyajl_cppflags" + LDFLAGS="$LDFLAGS $with_libyajl_ldflags" + + AC_CHECK_LIB(yajl, yajl_alloc, [with_libyajl="yes"], [with_libyajl="no (Symbol 'yajl_alloc' not found)"]) + + CPPFLAGS="$SAVE_CPPFLAGS" + LDFLAGS="$SAVE_LDFLAGS" +fi +if test "x$with_libyajl" = "xyes" +then + BUILD_WITH_LIBYAJL_CPPFLAGS="$with_libyajl_cppflags" + BUILD_WITH_LIBYAJL_LDFLAGS="$with_libyajl_ldflags" + BUILD_WITH_LIBYAJL_LIBS="-lyajl" + AC_SUBST(BUILD_WITH_LIBYAJL_CPPFLAGS) + AC_SUBST(BUILD_WITH_LIBYAJL_LDFLAGS) + AC_SUBST(BUILD_WITH_LIBYAJL_LIBS) + AC_DEFINE(HAVE_LIBYAJL, 1, [Define if libyajl is present and usable.]) +fi +AM_CONDITIONAL(BUILD_WITH_LIBYAJL, test "x$with_libyajl" = "xyes") +# }}} + # pkg-config --exists 'libxml-2.0'; pkg-config --exists libvirt {{{ with_libxml2="no (pkg-config isn't available)" with_libxml2_cflags="" @@ -3220,6 +3271,7 @@ plugin_ascent="no" plugin_battery="no" plugin_bind="no" plugin_conntrack="no" +plugin_couchdb="no" plugin_cpu="no" plugin_cpufreq="no" plugin_df="no" @@ -3337,6 +3389,11 @@ then plugin_ipmi="yes" fi +if test "x$with_libcurl" = "xyes" && test "x$with_libyajl" = "xyes" +then + plugin_couchdb="yes" +fi + if test "x$have_processor_info" = "xyes" then plugin_cpu="yes" @@ -3440,6 +3497,7 @@ AC_PLUGIN([ascent], [$plugin_ascent], [AscentEmu player statistics]) AC_PLUGIN([battery], [$plugin_battery], [Battery statistics]) AC_PLUGIN([bind], [$plugin_bind], [ISC Bind nameserver statistics]) AC_PLUGIN([conntrack], [$plugin_conntrack], [nf_conntrack statistics]) +AC_PLUGIN([couchdb], [$plugin_couchdb], [CouchDB statistics]) AC_PLUGIN([cpufreq], [$plugin_cpufreq], [CPU frequency statistics]) AC_PLUGIN([cpu], [$plugin_cpu], [CPU usage statistics]) AC_PLUGIN([csv], [yes], [CSV output plugin]) @@ -3724,6 +3782,7 @@ Configuration: battery . . . . . . . $enable_battery bind . . . . . . . . $enable_bind conntrack . . . . . . $enable_conntrack + couchdb . . . . . . . $enable_couchdb cpu . . . . . . . . . $enable_cpu cpufreq . . . . . . . $enable_cpufreq csv . . . . . . . . . $enable_csv diff --git a/src/Makefile.am b/src/Makefile.am index 48967365..04dec41d 100644 --- a/src/Makefile.am +++ b/src/Makefile.am @@ -174,6 +174,21 @@ collectd_LDADD += "-dlopen" conntrack.la collectd_DEPENDENCIES += conntrack.la endif +if BUILD_PLUGIN_COUCHDB +pkglib_LTLIBRARIES += couchdb.la +couchdb_la_SOURCES = couchdb.c +couchdb_la_CFLAGS = $(AM_CFLAGS) +couchdb_la_LDFLAGS = -module -avoid-version $(BUILD_WITH_LIBYAJL_LDFLAGS) +couchdb_la_CPPFLAGS = $(BUILD_WITH_LIBYAJL_CPPFLAGS) +couchdb_la_LIBADD = $(BUILD_WITH_LIBYAJL_LIBS) +if BUILD_WITH_LIBCURL +couchdb_la_CFLAGS += $(BUILD_WITH_LIBCURL_CFLAGS) +couchdb_la_LIBADD += $(BUILD_WITH_LIBCURL_LIBS) +endif +collectd_LDADD += "-dlopen" couchdb.la +collectd_DEPENDENCIES += couchdb.la +endif + if BUILD_PLUGIN_CPU pkglib_LTLIBRARIES += cpu.la cpu_la_SOURCES = cpu.c diff --git a/src/collectd.conf.in b/src/collectd.conf.in index 92df4a7b..2e2237f5 100644 --- a/src/collectd.conf.in +++ b/src/collectd.conf.in @@ -57,6 +57,7 @@ FQDNLookup true #@BUILD_PLUGIN_BATTERY_TRUE@LoadPlugin battery #@BUILD_PLUGIN_BIND_TRUE@LoadPlugin bind #@BUILD_PLUGIN_CONNTRACK_TRUE@LoadPlugin conntrack +#@BUILD_PLUGIN_COUCHDB_TRUE@LoadPlugin couchdb @BUILD_PLUGIN_CPU_TRUE@@BUILD_PLUGIN_CPU_TRUE@LoadPlugin cpu #@BUILD_PLUGIN_CPUFREQ_TRUE@LoadPlugin cpufreq @LOAD_PLUGIN_CSV@LoadPlugin csv @@ -166,6 +167,37 @@ FQDNLookup true # # +# +## See: http://wiki.apache.org/couchdb/Runtime_Statistics +# +# Instance "httpd" +# +# Type "http_requests" +# +# +# +# Type "http_request_methods" +# +# +# +# Type "http_response_codes" +# +# +## Database status metrics: +# +# Instance "dbs" +# +# Type "gauge" +# +# +# Type "counter" +# +# +# Type "bytes" +# +# +# + # # DataDir "@prefix@/var/lib/@PACKAGE_NAME@/csv" # StoreRates false diff --git a/src/collectd.conf.pod b/src/collectd.conf.pod index ad7cc210..0f8160f0 100644 --- a/src/collectd.conf.pod +++ b/src/collectd.conf.pod @@ -409,6 +409,106 @@ By default no detailed zone information is collected. =back +=head2 Plugin C + +The couchdb plugin uses B (L) and B +(L) to collect values from CouchDB +documents (stored JSON notation). + +The following example will collect several values from the built-in `_stats' +runtime statistics module (L). + + + + Instance "httpd" + + Type "http_requests" + + + + Type "http_request_methods" + + + + Type "http_response_codes" + + + + +The following example will collect the status values from each database: + + + Instance "dbs" + + Type "gauge" + + + Type "counter" + + + Type "bytes" + + + +In the B block, there may be one or more B blocks, each defining +a URL to be fetched via HTTP (libcurl) and one or more B blocks. +The B string argument must be in a path format, of which is used to collect +a value from a JSON map object. If a B path element is that of a I<*> wildcard, +the values for all keys will be collectd. + +The following options are valid within B blocks: + +=over 4 + +=item B I + +Sets the plugin instance to I. + +=item B I + +Username to use if authorization is required to read the page. + +=item B I + +Password to use if authorization is required to read the page. + +=item B B|B + +Enable or disable peer SSL certificate verification. See +L for details. Enabled by default. + +=item B B|B + +Enable or disable peer host name verification. If enabled, the plugin checks if +the C or a C field of the SSL certificate +matches the host name provided by the B option. If this identity check +fails, the connection is aborted. Obviously, only works when connecting to a +SSL enabled server. Enabled by default. + +=item B I + +File that holds one or more SSL certificates. If you want to use HTTPS you will +possibly need this option. What CA certificates come bundled with C +and are checked by default depends on the distribution you use. + +=back + +The following options are valid within B blocks: + +=over 4 + +=item B I + +Sets the type used to dispatch the values to the daemon. Detailed information +about types and their configuration can be found in L. This +option is mandatory. + +=item B I + +Type-instance to use. Defaults to the current map key or current string array element value. + +=back + =head2 Plugin C This plugin doesn't have any options. It reads diff --git a/src/couchdb.c b/src/couchdb.c new file mode 100644 index 00000000..361e9e93 --- /dev/null +++ b/src/couchdb.c @@ -0,0 +1,808 @@ +/** + * collectd - src/couchdb.c + * Copyright (C) 2009 Doug MacEachern + * Copyright (C) 2006-2009 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: + * Doug MacEachern + * Florian octo Forster + **/ + +#include "collectd.h" +#include "common.h" +#include "plugin.h" +#include "configfile.h" +#include "utils_avltree.h" + +#include +#include + +#define COUCHDB_DEFAULT_HOST "localhost" +#define COUCHDB_KEY_MAGIC 0x43484b59UL /* CHKY */ +#define COUCHDB_IS_KEY(key) (key)->magic == COUCHDB_KEY_MAGIC +#define COUCHDB_ANY "*" +#define COUCH_MIN(x,y) ((x) < (y) ? (x) : (y)) + +struct couchdb_key_s; +typedef struct couchdb_key_s couchdb_key_t; +struct couchdb_key_s /* {{{ */ +{ + char *path; + char *type; + char *instance; + unsigned long magic; +}; +/* }}} */ + +struct couchdb_s /* {{{ */ +{ + char *instance; + char *host; + + char *url; + char *user; + char *pass; + char *credentials; + int verify_peer; + int verify_host; + char *cacert; + + CURL *curl; + char curl_errbuf[CURL_ERROR_SIZE]; + + yajl_handle yajl; + c_avl_tree_t *tree; + couchdb_key_t *key; + int depth; + struct { + union { + c_avl_tree_t *tree; + couchdb_key_t *key; + }; + char name[DATA_MAX_NAME_LEN]; + } state[YAJL_MAX_DEPTH]; +}; +typedef struct couchdb_s couchdb_t; /* }}} */ + +static int couchdb_read (user_data_t *ud); +static int couchdb_curl_perform (couchdb_t *db, CURL *curl); +static void couchdb_submit (couchdb_t *db, couchdb_key_t *key, value_t *value); + +static size_t couchdb_curl_callback (void *buf, /* {{{ */ + size_t size, size_t nmemb, void *user_data) +{ + couchdb_t *db; + size_t len; + yajl_status status; + + len = size * nmemb; + + if (len <= 0) + return (len); + + db = user_data; + if (db == NULL) + return (0); + + status = yajl_parse(db->yajl, (unsigned char *)buf, len); + if (status == yajl_status_ok) + { + status = yajl_parse_complete(db->yajl); + return (len); + } + else if (status == yajl_status_insufficient_data) + return (len); + + if (status != yajl_status_ok) + { + unsigned char *msg = + yajl_get_error(db->yajl, 1, (unsigned char *)buf, len); + ERROR ("couchdb plugin: yajl_parse failed: %s", msg); + yajl_free_error(db->yajl, msg); + return (0); /* abort write callback */ + } + + return (len); +} /* }}} size_t couchdb_curl_callback */ + +static int couchdb_get_type (couchdb_key_t *key) +{ + const data_set_t *ds; + + ds = plugin_get_ds (key->type); + if (ds == NULL) + return -1; /* let plugin_write do the complaining */ + else + return ds->ds[0].type; /* XXX support ds->ds_len > 1 */ +} + +/* yajl callbacks */ +static int couchcb_integer (void *ctx, long val) +{ + couchdb_t *db = (couchdb_t *)ctx; + couchdb_key_t *key = db->state[db->depth].key; + + if (key != NULL) + { + value_t vt; + int type; + + type = couchdb_get_type (key); + if (type == DS_TYPE_COUNTER) + vt.counter = val; + else + vt.gauge = (double)val; + + couchdb_submit (db, key, &vt); + } + return 1; +} + +static int couchcb_double (void *ctx, double val) +{ + couchdb_t *db = (couchdb_t *)ctx; + couchdb_key_t *key = db->state[db->depth].key; + + if (key != NULL) + { + value_t vt; + int type; + + type = couchdb_get_type (key); + if (type == DS_TYPE_GAUGE) + vt.gauge = val; + else + vt.counter = val; + + couchdb_submit (db, key, &vt); + } + return 1; +} + +static int couchcb_map_key (void *ctx, const unsigned char *val, + unsigned int len) +{ + couchdb_t *db = (couchdb_t *)ctx; + c_avl_tree_t *tree; + + tree = db->state[db->depth-1].tree; + + if (tree != NULL) + { + couchdb_key_t *value; + char *name; + + name = db->state[db->depth].name; + len = COUCH_MIN(len, sizeof (db->state[db->depth].name)-1); + sstrncpy (name, (char *)val, len+1); + + if (c_avl_get (tree, name, (void *) &value) == 0) + db->state[db->depth].key = value; + else if (c_avl_get (tree, COUCHDB_ANY, (void *) &value) == 0) + db->state[db->depth].key = value; + else + db->state[db->depth].key = NULL; + } + + return 1; +} + +static int couchcb_string (void *ctx, const unsigned char *val, + unsigned int len) +{ + couchdb_t *db = (couchdb_t *)ctx; + c_avl_tree_t *tree; + char *ptr; + + if (db->depth != 1) /* e.g. _all_dbs */ + return 1; + + couchcb_map_key (ctx, val, len); /* same logic */ + + tree = db->state[db->depth].tree; + + if ((tree != NULL) && (ptr = rindex (db->url, '/'))) + { + char url[PATH_MAX]; + CURL *curl; + + /* url =~ s,[^/]+$,$name, */ + len = (ptr - db->url) + 1; + ptr = url; + sstrncpy (ptr, db->url, sizeof (url)); + sstrncpy (ptr + len, db->state[db->depth].name, sizeof (url) - len); + + curl = curl_easy_duphandle (db->curl); + curl_easy_setopt (curl, CURLOPT_URL, url); + couchdb_curl_perform (db, curl); + curl_easy_cleanup (curl); + } + return 1; +} + +static int couchcb_start (void *ctx) +{ + couchdb_t *db = (couchdb_t *)ctx; + if (++db->depth >= YAJL_MAX_DEPTH) + { + ERROR ("couchdb plugin: %s depth exceeds max, aborting.", db->url); + return 0; + } + return 1; +} + +static int couchcb_end (void *ctx) +{ + couchdb_t *db = (couchdb_t *)ctx; + db->state[db->depth].tree = NULL; + --db->depth; + return 1; +} + +static int couchcb_start_map (void *ctx) +{ + return couchcb_start (ctx); +} + +static int couchcb_end_map (void *ctx) +{ + return couchcb_end (ctx); +} + +static int couchcb_start_array (void * ctx) +{ + return couchcb_start (ctx); +} + +static int couchcb_end_array (void * ctx) +{ + return couchcb_start (ctx); +} + +static yajl_callbacks ycallbacks = { + NULL, /* null */ + NULL, /* boolean */ + couchcb_integer, + couchcb_double, + NULL, /* number */ + couchcb_string, + couchcb_start_map, + couchcb_map_key, + couchcb_end_map, + couchcb_start_array, + couchcb_end_array +}; + +/* end yajl callbacks */ + +static void couchdb_key_free (couchdb_key_t *key) /* {{{ */ +{ + if (key == NULL) + return; + + sfree (key->path); + sfree (key->type); + sfree (key->instance); + + sfree (key); +} /* }}} void couchdb_key_free */ + +static void couchdb_tree_free (c_avl_tree_t *tree) /* {{{ */ +{ + char *name; + void *value; + + while (c_avl_pick (tree, (void *) &name, (void *) &value) == 0) + { + couchdb_key_t *key = (couchdb_key_t *)value; + + if (COUCHDB_IS_KEY(key)) + couchdb_key_free (key); + else + couchdb_tree_free ((c_avl_tree_t *)value); + + sfree (name); + } + + c_avl_destroy (tree); +} /* }}} void couchdb_tree_free */ + +static void couchdb_free (void *arg) /* {{{ */ +{ + couchdb_t *db; + + DEBUG ("couchdb plugin: couchdb_free (arg = %p);", arg); + + db = (couchdb_t *) arg; + + if (db == NULL) + return; + + if (db->curl != NULL) + curl_easy_cleanup (db->curl); + db->curl = NULL; + + if (db->tree != NULL) + couchdb_tree_free (db->tree); + db->tree = NULL; + + sfree (db->instance); + sfree (db->host); + + sfree (db->url); + sfree (db->user); + sfree (db->pass); + sfree (db->credentials); + sfree (db->cacert); + + sfree (db); +} /* }}} void couchdb_free */ + +/* Configuration handling functions {{{ */ + +static int couchdb_config_add_string (const char *name, char **dest, /* {{{ */ + oconfig_item_t *ci) +{ + if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING)) + { + WARNING ("couchdb plugin: `%s' needs exactly one string argument.", name); + return (-1); + } + + sfree (*dest); + *dest = strdup (ci->values[0].value.string); + if (*dest == NULL) + return (-1); + + return (0); +} /* }}} int couchdb_config_add_string */ + +static int couchdb_config_set_boolean (const char *name, int *dest, /* {{{ */ + oconfig_item_t *ci) +{ + if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_BOOLEAN)) + { + WARNING ("couchdb plugin: `%s' needs exactly one boolean argument.", name); + return (-1); + } + + *dest = ci->values[0].value.boolean ? 1 : 0; + + return (0); +} /* }}} int couchdb_config_set_boolean */ + +static c_avl_tree_t *couchdb_avl_create(void) +{ + return c_avl_create ((int (*) (const void *, const void *)) strcmp); +} + +static int couchdb_config_add_key (couchdb_t *db, /* {{{ */ + oconfig_item_t *ci) +{ + couchdb_key_t *key; + int status; + int i; + + if ((ci->values_num != 1) + || (ci->values[0].type != OCONFIG_TYPE_STRING)) + { + WARNING ("couchdb plugin: The `Key' block " + "needs exactly one string argument."); + return (-1); + } + + key = (couchdb_key_t *) malloc (sizeof (*key)); + if (key == NULL) + { + ERROR ("couchdb plugin: malloc failed."); + return (-1); + } + memset (key, 0, sizeof (*key)); + key->magic = COUCHDB_KEY_MAGIC; + + if (strcasecmp ("Key", ci->key) == 0) + { + status = couchdb_config_add_string ("Key", &key->path, ci); + if (status != 0) + { + sfree (key); + return (status); + } + } + else + { + ERROR ("couchdb plugin: couchdb_config: " + "Invalid key: %s", ci->key); + return (-1); + } + + status = 0; + for (i = 0; i < ci->children_num; i++) + { + oconfig_item_t *child = ci->children + i; + + if (strcasecmp ("Type", child->key) == 0) + status = couchdb_config_add_string ("Type", &key->type, child); + else if (strcasecmp ("Instance", child->key) == 0) + status = couchdb_config_add_string ("Instance", &key->instance, child); + else + { + WARNING ("couchdb plugin: Option `%s' not allowed here.", child->key); + status = -1; + } + + if (status != 0) + break; + } /* for (i = 0; i < ci->children_num; i++) */ + + while (status == 0) + { + if (key->type == NULL) + { + WARNING ("couchdb plugin: `Type' missing in `Key' block."); + status = -1; + } + + break; + } /* while (status == 0) */ + + /* store path in a tree that will match the json map structure, example: + * "httpd/requests/count", + * "httpd/requests/current" -> + * { "httpd": { "requests": { "count": $key, "current": $key } } } + */ + if (status == 0) + { + char *ptr; + char *name; + char ent[PATH_MAX]; + c_avl_tree_t *tree; + + if (db->tree == NULL) + db->tree = couchdb_avl_create(); + + tree = db->tree; + name = key->path; + ptr = key->path; + if (*ptr == '/') + ++ptr; + + name = ptr; + while (*ptr) + { + if (*ptr == '/') + { + c_avl_tree_t *value; + int len; + + len = ptr-name; + if (len == 0) + break; + sstrncpy (ent, name, len+1); + + if (c_avl_get (tree, ent, (void *) &value) != 0) + { + value = couchdb_avl_create (); + c_avl_insert (tree, strdup (ent), value); + } + + tree = value; + name = ptr+1; + } + ++ptr; + } + if (*name) + c_avl_insert (tree, strdup(name), key); + else + { + ERROR ("couchdb plugin: invalid key: %s", key->path); + status = -1; + } + } + + return (status); +} /* }}} int couchdb_config_add_key */ + +static int couchdb_init_curl (couchdb_t *db) /* {{{ */ +{ + db->curl = curl_easy_init (); + if (db->curl == NULL) + { + ERROR ("couchdb plugin: curl_easy_init failed."); + return (-1); + } + + curl_easy_setopt (db->curl, CURLOPT_WRITEFUNCTION, couchdb_curl_callback); + curl_easy_setopt (db->curl, CURLOPT_WRITEDATA, db); + curl_easy_setopt (db->curl, CURLOPT_USERAGENT, + PACKAGE_NAME"/"PACKAGE_VERSION); + curl_easy_setopt (db->curl, CURLOPT_ERRORBUFFER, db->curl_errbuf); + curl_easy_setopt (db->curl, CURLOPT_URL, db->url); + + if (db->user != NULL) + { + size_t credentials_size; + + credentials_size = strlen (db->user) + 2; + if (db->pass != NULL) + credentials_size += strlen (db->pass); + + db->credentials = (char *) malloc (credentials_size); + if (db->credentials == NULL) + { + ERROR ("couchdb plugin: malloc failed."); + return (-1); + } + + ssnprintf (db->credentials, credentials_size, "%s:%s", + db->user, (db->pass == NULL) ? "" : db->pass); + curl_easy_setopt (db->curl, CURLOPT_USERPWD, db->credentials); + } + + curl_easy_setopt (db->curl, CURLOPT_SSL_VERIFYPEER, db->verify_peer); + curl_easy_setopt (db->curl, CURLOPT_SSL_VERIFYHOST, + db->verify_host ? 2 : 0); + if (db->cacert != NULL) + curl_easy_setopt (db->curl, CURLOPT_CAINFO, db->cacert); + + return (0); +} /* }}} int couchdb_init_curl */ + +static int couchdb_config_add_url (oconfig_item_t *ci) /* {{{ */ +{ + couchdb_t *db; + int status = 0; + int i; + + if ((ci->values_num != 1) + || (ci->values[0].type != OCONFIG_TYPE_STRING)) + { + WARNING ("couchdb plugin: The `URL' block " + "needs exactly one string argument."); + return (-1); + } + + db = (couchdb_t *) malloc (sizeof (*db)); + if (db == NULL) + { + ERROR ("couchdb plugin: malloc failed."); + return (-1); + } + memset (db, 0, sizeof (*db)); + + if (strcasecmp ("URL", ci->key) == 0) + { + status = couchdb_config_add_string ("URL", &db->url, ci); + if (status != 0) + { + sfree (db); + return (status); + } + } + else + { + ERROR ("couchdb plugin: couchdb_config: " + "Invalid key: %s", ci->key); + return (-1); + } + + /* Fill the `couchdb_t' structure.. */ + for (i = 0; i < ci->children_num; i++) + { + oconfig_item_t *child = ci->children + i; + + if (strcasecmp ("Instance", child->key) == 0) + status = couchdb_config_add_string ("Instance", &db->instance, child); + else if (strcasecmp ("Host", child->key) == 0) + status = couchdb_config_add_string ("Host", &db->host, child); + else if (strcasecmp ("User", child->key) == 0) + status = couchdb_config_add_string ("User", &db->user, child); + else if (strcasecmp ("Password", child->key) == 0) + status = couchdb_config_add_string ("Password", &db->pass, child); + else if (strcasecmp ("VerifyPeer", child->key) == 0) + status = couchdb_config_set_boolean ("VerifyPeer", &db->verify_peer, child); + else if (strcasecmp ("VerifyHost", child->key) == 0) + status = couchdb_config_set_boolean ("VerifyHost", &db->verify_host, child); + else if (strcasecmp ("CACert", child->key) == 0) + status = couchdb_config_add_string ("CACert", &db->cacert, child); + else if (strcasecmp ("Key", child->key) == 0) + status = couchdb_config_add_key (db, child); + else + { + WARNING ("couchdb plugin: Option `%s' not allowed here.", child->key); + status = -1; + } + + if (status != 0) + break; + } + + if (status == 0) + { + if (db->tree == NULL) + { + WARNING ("couchdb plugin: No (valid) `Key' block " + "within `URL' block `%s'.", db->url); + status = -1; + } + if (status == 0) + status = couchdb_init_curl (db); + } + + /* If all went well, register this database for reading */ + if (status == 0) + { + user_data_t ud; + char cb_name[DATA_MAX_NAME_LEN]; + + if (db->instance == NULL) + db->instance = strdup("default"); + + DEBUG ("couchdb plugin: Registering new read callback: %s", + db->instance); + + memset (&ud, 0, sizeof (ud)); + ud.data = (void *) db; + ud.free_func = couchdb_free; + + ssnprintf (cb_name, sizeof (cb_name), "couchdb-%s-%s", + db->instance, db->url); + + plugin_register_complex_read (cb_name, couchdb_read, + /* interval = */ NULL, &ud); + } + else + { + couchdb_free (db); + return (-1); + } + + return (0); +} + /* }}} int couchdb_config_add_database */ + +static int couchdb_config (oconfig_item_t *ci) /* {{{ */ +{ + int success; + int errors; + int status; + int i; + + success = 0; + errors = 0; + + for (i = 0; i < ci->children_num; i++) + { + oconfig_item_t *child = ci->children + i; + + if (strcasecmp ("URL", child->key) == 0) + { + status = couchdb_config_add_url (child); + if (status == 0) + success++; + else + errors++; + } + else + { + WARNING ("couchdb plugin: Option `%s' not allowed here.", child->key); + errors++; + } + } + + if ((success == 0) && (errors > 0)) + { + ERROR ("couchdb plugin: All statements failed."); + return (-1); + } + + return (0); +} /* }}} int couchdb_config */ + +/* }}} End of configuration handling functions */ + +static void couchdb_submit (couchdb_t *db, couchdb_key_t *key, value_t *value) /* {{{ */ +{ + value_list_t vl = VALUE_LIST_INIT; + char *host; + + vl.values = value; + vl.values_len = 1; + + if ((db->host == NULL) + || (strcmp ("", db->host) == 0) + || (strcmp (COUCHDB_DEFAULT_HOST, db->host) == 0)) + host = hostname_g; + else + host = db->host; + + if (key->instance == NULL) + ssnprintf (vl.type_instance, sizeof (vl.type_instance), "%s-%s", + db->state[db->depth-1].name, db->state[db->depth].name); + else + sstrncpy (vl.type_instance, key->instance, sizeof (vl.type_instance)); + + sstrncpy (vl.host, host, sizeof (vl.host)); + sstrncpy (vl.plugin, "couchdb", sizeof (vl.plugin)); + sstrncpy (vl.plugin_instance, db->instance, sizeof (vl.plugin_instance)); + sstrncpy (vl.type, key->type, sizeof (vl.type)); + + plugin_dispatch_values (&vl); +} /* }}} int couchdb_submit */ + +static int couchdb_curl_perform (couchdb_t *db, CURL *curl) /* {{{ */ +{ + int status; + long rc; + char *url; + yajl_handle yprev = db->yajl; + + db->yajl = yajl_alloc (&ycallbacks, NULL, NULL, (void *)db); + if (db->yajl == NULL) + { + ERROR ("couchdb plugin: yajl_alloc failed."); + return (-1); + } + + status = curl_easy_perform (curl); + + yajl_free (db->yajl); + db->yajl = yprev; + + curl_easy_getinfo(curl, CURLINFO_EFFECTIVE_URL, &url); + curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &rc); + + if (rc != 200) + { + ERROR ("couchdb plugin: curl_easy_perform failed with response code %ld (%s)", + rc, url); + return (-1); + } + + if (status != 0) + { + ERROR ("couchdb plugin: curl_easy_perform failed with status %i: %s (%s)", + status, db->curl_errbuf, url); + return (-1); + } + + return (0); +} /* }}} int couchdb_curl_perform */ + +static int couchdb_read (user_data_t *ud) /* {{{ */ +{ + couchdb_t *db; + + if ((ud == NULL) || (ud->data == NULL)) + { + ERROR ("couchdb plugin: couchdb_read: Invalid user data."); + return (-1); + } + + db = (couchdb_t *) ud->data; + + db->depth = 0; + memset (&db->state, 0, sizeof(db->state)); + db->state[db->depth].tree = db->tree; + db->key = NULL; + + return couchdb_curl_perform (db, db->curl); +} /* }}} int couchdb_read */ + +void module_register (void) +{ + plugin_register_complex_config ("couchdb", couchdb_config); +} /* void module_register */ diff --git a/src/types.db b/src/types.db index a92153ca..6ebc20d0 100644 --- a/src/types.db +++ b/src/types.db @@ -45,6 +45,9 @@ files value:GAUGE:0:U frequency frequency:GAUGE:0:U frequency_offset ppm:GAUGE:-1000000:1000000 gauge value:GAUGE:U:U +http_requests count:COUNTER:0:134217728 +http_request_methods count:COUNTER:0:134217728 +http_response_codes count:COUNTER:0:134217728 humidity value:GAUGE:0:100 if_collisions value:COUNTER:0:4294967295 if_dropped rx:COUNTER:0:4294967295, tx:COUNTER:0:4294967295