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diff --git a/src/write_kafka.c b/src/write_kafka.c
index eaaf171262bd0b06ef07e0ddb8e32056bb9d873b..6d826c25ba213ad9acf6ae1f8a56a16e62fceeab 100644 (file)
--- a/src/write_kafka.c
+++ b/src/write_kafka.c
#include "plugin.h"
#include "common.h"
-#include "configfile.h"
-#include "utils_cache.h"
#include "utils_cmd_putval.h"
#include "utils_format_graphite.h"
#include "utils_format_json.h"
-#include "utils_crc32.h"
#include <stdint.h>
#include <librdkafka/rdkafka.h>
-#include <pthread.h>
-#include <zlib.h>
#include <errno.h>
struct kafka_topic_context {
#define KAFKA_FORMAT_JSON 0
#define KAFKA_FORMAT_COMMAND 1
#define KAFKA_FORMAT_GRAPHITE 2
- uint8_t format;
+ uint8_t format;
unsigned int graphite_flags;
_Bool store_rates;
rd_kafka_topic_conf_t *conf;
rd_kafka_topic_t *topic;
rd_kafka_conf_t *kafka_conf;
rd_kafka_t *kafka;
- int has_key;
- uint32_t key;
+ char *key;
char *prefix;
char *postfix;
char escape_char;
char *topic_name;
- pthread_mutex_t lock;
+ pthread_mutex_t lock;
};
static int kafka_handle(struct kafka_topic_context *);
}
#endif
+static uint32_t kafka_hash(const char *keydata, size_t keylen)
+{
+ uint32_t hash = 5381;
+ for (; keylen > 0; keylen--)
+ hash = ((hash << 5) + hash) + keydata[keylen - 1];
+ return hash;
+}
+
+/* 31 bit -> 4 byte -> 8 byte hex string + null byte */
+#define KAFKA_RANDOM_KEY_SIZE 9
+#define KAFKA_RANDOM_KEY_BUFFER (char[KAFKA_RANDOM_KEY_SIZE]) {""}
+static char *kafka_random_key(char buffer[static KAFKA_RANDOM_KEY_SIZE])
+{
+ ssnprintf(buffer, KAFKA_RANDOM_KEY_SIZE, "%08lX", (unsigned long) mrand48());
+ return buffer;
+}
+
static int32_t kafka_partition(const rd_kafka_topic_t *rkt,
const void *keydata, size_t keylen,
int32_t partition_cnt, void *p, void *m)
{
- uint32_t key = *((uint32_t *)keydata );
+ uint32_t key = kafka_hash(keydata, keylen);
uint32_t target = key % partition_cnt;
- int32_t i = partition_cnt;
+ int32_t i = partition_cnt;
while (--i > 0 && !rd_kafka_topic_partition_available(rkt, target)) {
target = (target + 1) % partition_cnt;
if ((ctx->kafka = rd_kafka_new(RD_KAFKA_PRODUCER, conf,
errbuf, sizeof(errbuf))) == NULL) {
- ERROR("write_kafka plugin: cannot create kafka handle.");
- return 1;
+ ERROR("write_kafka plugin: cannot create kafka handle.");
+ return 1;
}
- rd_kafka_conf_destroy(ctx->kafka_conf);
- ctx->kafka_conf = NULL;
+ rd_kafka_conf_destroy(ctx->kafka_conf);
+ ctx->kafka_conf = NULL;
- INFO ("write_kafka plugin: created KAFKA handle : %s", rd_kafka_name(ctx->kafka));
+ INFO ("write_kafka plugin: created KAFKA handle : %s", rd_kafka_name(ctx->kafka));
-#ifdef HAVE_LIBRDKAFKA_LOGGER
- rd_kafka_set_logger(ctx->kafka, kafka_log);
+#if defined(HAVE_LIBRDKAFKA_LOGGER) && !defined(HAVE_LIBRDKAFKA_LOG_CB)
+ rd_kafka_set_logger(ctx->kafka, kafka_log);
#endif
}
if (ctx->topic == NULL ) {
- if ((topic_conf = rd_kafka_topic_conf_dup(ctx->conf)) == NULL) {
+ if ((topic_conf = rd_kafka_topic_conf_dup(ctx->conf)) == NULL) {
ERROR("write_kafka plugin: cannot duplicate kafka topic config");
return 1;
- }
+ }
- if ((ctx->topic = rd_kafka_topic_new(ctx->kafka, ctx->topic_name,
- topic_conf)) == NULL) {
- ERROR("write_kafka plugin: cannot create topic : %s\n",
- rd_kafka_err2str(rd_kafka_errno2err(errno)));
- return errno;
- }
+ if ((ctx->topic = rd_kafka_topic_new(ctx->kafka, ctx->topic_name,
+ topic_conf)) == NULL) {
+ ERROR("write_kafka plugin: cannot create topic : %s\n",
+ rd_kafka_err2str(rd_kafka_errno2err(errno)));
+ return errno;
+ }
- rd_kafka_topic_conf_destroy(ctx->conf);
- ctx->conf = NULL;
+ rd_kafka_topic_conf_destroy(ctx->conf);
+ ctx->conf = NULL;
- INFO ("write_kafka plugin: handle created for topic : %s", rd_kafka_topic_name(ctx->topic));
+ INFO ("write_kafka plugin: handle created for topic : %s", rd_kafka_topic_name(ctx->topic));
}
return(0);
} /* }}} int kafka_handle */
static int kafka_write(const data_set_t *ds, /* {{{ */
- const value_list_t *vl,
- user_data_t *ud)
+ const value_list_t *vl,
+ user_data_t *ud)
{
- int status = 0;
- uint32_t key;
- char buffer[8192];
- size_t bfree = sizeof(buffer);
- size_t bfill = 0;
- size_t blen = 0;
- struct kafka_topic_context *ctx = ud->data;
+ int status = 0;
+ void *key;
+ size_t keylen = 0;
+ char buffer[8192];
+ size_t bfree = sizeof(buffer);
+ size_t bfill = 0;
+ size_t blen = 0;
+ struct kafka_topic_context *ctx = ud->data;
if ((ds == NULL) || (vl == NULL) || (ctx == NULL))
return EINVAL;
blen = strlen(buffer);
break;
case KAFKA_FORMAT_JSON:
-
format_json_initialize(buffer, &bfill, &bfree);
format_json_value_list(buffer, &bfill, &bfree, ds, vl,
ctx->store_rates);
return -1;
}
- /*
- * We partition our stream by metric name
- */
- if (ctx->has_key)
- key = ctx->key;
- else
- key = rand();
+ key = (ctx->key != NULL)
+ ? ctx->key
+ : kafka_random_key(KAFKA_RANDOM_KEY_BUFFER);
+ keylen = strlen (key);
rd_kafka_produce(ctx->topic, RD_KAFKA_PARTITION_UA,
RD_KAFKA_MSG_F_COPY, buffer, blen,
- &key, sizeof(key), NULL);
+ key, keylen, NULL);
- return status;
+ return status;
} /* }}} int kafka_write */
static void kafka_topic_context_free(void *p) /* {{{ */
{
- struct kafka_topic_context *ctx = p;
+ struct kafka_topic_context *ctx = p;
- if (ctx == NULL)
- return;
+ if (ctx == NULL)
+ return;
if (ctx->topic_name != NULL)
sfree(ctx->topic_name);
static void kafka_config_topic(rd_kafka_conf_t *conf, oconfig_item_t *ci) /* {{{ */
{
int status;
- int i;
struct kafka_topic_context *tctx;
char *key = NULL;
char *val;
char callback_name[DATA_MAX_NAME_LEN];
char errbuf[1024];
- user_data_t ud;
- oconfig_item_t *child;
+ oconfig_item_t *child;
rd_kafka_conf_res_t ret;
- if ((tctx = calloc(1, sizeof (*tctx))) == NULL) {
- ERROR ("write_kafka plugin: calloc failed.");
+ if ((tctx = calloc(1, sizeof (*tctx))) == NULL) {
+ ERROR ("write_kafka plugin: calloc failed.");
return;
- }
+ }
tctx->escape_char = '.';
tctx->store_rates = 1;
tctx->format = KAFKA_FORMAT_JSON;
+ tctx->key = NULL;
if ((tctx->kafka_conf = rd_kafka_conf_dup(conf)) == NULL) {
sfree(tctx);
@@ -298,48 +305,41 @@ static void kafka_config_topic(rd_kafka_conf_t *conf, oconfig_item_t *ci) /* {{{
goto errout;
}
- 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 ("Property", child->key) == 0) {
- if (child->values_num != 2) {
- WARNING("kafka properties need both a key and a value.");
+ for (int 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 ("Property", child->key) == 0) {
+ if (child->values_num != 2) {
+ WARNING("kafka properties need both a key and a value.");
goto errout;
- }
- if (child->values[0].type != OCONFIG_TYPE_STRING ||
- child->values[1].type != OCONFIG_TYPE_STRING) {
- WARNING("kafka properties needs string arguments.");
+ }
+ if (child->values[0].type != OCONFIG_TYPE_STRING ||
+ child->values[1].type != OCONFIG_TYPE_STRING) {
+ WARNING("kafka properties needs string arguments.");
goto errout;
- }
+ }
key = child->values[0].value.string;
val = child->values[1].value.string;
ret = rd_kafka_topic_conf_set(tctx->conf,key, val,
errbuf, sizeof(errbuf));
if (ret != RD_KAFKA_CONF_OK) {
- WARNING("cannot set kafka topic property %s to %s: %s.",
+ WARNING("cannot set kafka topic property %s to %s: %s.",
key, val, errbuf);
goto errout;
- }
-
- } else if (strcasecmp ("Key", child->key) == 0) {
- char *tmp_buf = NULL;
- status = cf_util_get_string(child, &tmp_buf);
- if (status != 0) {
- WARNING("write_kafka plugin: invalid key supplied");
- break;
}
- if (strcasecmp(tmp_buf, "Random") != 0) {
- tctx->has_key = 1;
- tctx->key = crc32_buffer((u_char *)tmp_buf, strlen(tmp_buf));
+ } else if (strcasecmp ("Key", child->key) == 0) {
+ if (cf_util_get_string (child, &tctx->key) != 0)
+ continue;
+ if (strcasecmp ("Random", tctx->key) == 0) {
+ sfree(tctx->key);
+ tctx->key = strdup (kafka_random_key (KAFKA_RANDOM_KEY_BUFFER));
}
- sfree(tmp_buf);
-
} else if (strcasecmp ("Format", child->key) == 0) {
status = cf_util_get_string(child, &key);
if (status != 0)
@@ -402,14 +402,16 @@ static void kafka_config_topic(rd_kafka_conf_t *conf, oconfig_item_t *ci) /* {{{
ssnprintf(callback_name, sizeof(callback_name),
"write_kafka/%s", tctx->topic_name);
- ud.data = tctx;
- ud.free_func = kafka_topic_context_free;
+ user_data_t ud = {
+ .data = tctx,
+ .free_func = kafka_topic_context_free
+ };
- status = plugin_register_write (callback_name, kafka_write, &ud);
- if (status != 0) {
- WARNING ("write_kafka plugin: plugin_register_write (\"%s\") "
- "failed with status %i.",
- callback_name, status);
+ status = plugin_register_write (callback_name, kafka_write, &ud);
+ if (status != 0) {
+ WARNING ("write_kafka plugin: plugin_register_write (\"%s\") "
+ "failed with status %i.",
+ callback_name, status);
goto errout;
}
@@ -422,14 +424,13 @@ static void kafka_config_topic(rd_kafka_conf_t *conf, oconfig_item_t *ci) /* {{{
if (tctx->conf != NULL)
rd_kafka_topic_conf_destroy(tctx->conf);
if (tctx->kafka_conf != NULL)
- rd_kafka_conf_destroy(tctx->kafka_conf);
+ rd_kafka_conf_destroy(tctx->kafka_conf);
sfree(tctx);
} /* }}} int kafka_config_topic */
static int kafka_config(oconfig_item_t *ci) /* {{{ */
{
- int i;
- oconfig_item_t *child;
+ oconfig_item_t *child;
rd_kafka_conf_t *conf;
rd_kafka_conf_res_t ret;
char errbuf[1024];
WARNING("cannot allocate kafka configuration.");
return -1;
}
- for (i = 0; i < ci->children_num; i++) {
- child = &ci->children[i];
+ for (int i = 0; i < ci->children_num; i++) {
+ child = &ci->children[i];
- if (strcasecmp("Topic", child->key) == 0) {
- kafka_config_topic (conf, child);
- } else if (strcasecmp(child->key, "Property") == 0) {
- char *key = NULL;
- char *val = NULL;
+ if (strcasecmp("Topic", child->key) == 0) {
+ kafka_config_topic (conf, child);
+ } else if (strcasecmp(child->key, "Property") == 0) {
+ char *key = NULL;
+ char *val = NULL;
- if (child->values_num != 2) {
- WARNING("kafka properties need both a key and a value.");
+ if (child->values_num != 2) {
+ WARNING("kafka properties need both a key and a value.");
goto errout;
- }
- if (child->values[0].type != OCONFIG_TYPE_STRING ||
- child->values[1].type != OCONFIG_TYPE_STRING) {
- WARNING("kafka properties needs string arguments.");
+ }
+ if (child->values[0].type != OCONFIG_TYPE_STRING ||
+ child->values[1].type != OCONFIG_TYPE_STRING) {
+ WARNING("kafka properties needs string arguments.");
goto errout;
- }
- if ((key = strdup(child->values[0].value.string)) == NULL) {
- WARNING("cannot allocate memory for attribute key.");
+ }
+ if ((key = strdup(child->values[0].value.string)) == NULL) {
+ WARNING("cannot allocate memory for attribute key.");
goto errout;
- }
- if ((val = strdup(child->values[1].value.string)) == NULL) {
- WARNING("cannot allocate memory for attribute value.");
+ }
+ if ((val = strdup(child->values[1].value.string)) == NULL) {
+ WARNING("cannot allocate memory for attribute value.");
+ sfree(key);
goto errout;
- }
+ }
ret = rd_kafka_conf_set(conf, key, val, errbuf, sizeof(errbuf));
if (ret != RD_KAFKA_CONF_OK) {
WARNING("cannot set kafka property %s to %s: %s",
key, val, errbuf);
+ sfree(key);
+ sfree(val);
goto errout;
}
- sfree(key);
- sfree(val);
- } else {
- WARNING ("write_kafka plugin: Ignoring unknown "
- "configuration option \"%s\" at top level.",
- child->key);
- }
- }
+ sfree(key);
+ sfree(val);
+ } else {
+ WARNING ("write_kafka plugin: Ignoring unknown "
+ "configuration option \"%s\" at top level.",
+ child->key);
+ }
+ }
if (conf != NULL)
rd_kafka_conf_destroy(conf);
return (0);
void module_register(void)
{
- plugin_register_complex_config ("write_kafka", kafka_config);
+ plugin_register_complex_config ("write_kafka", kafka_config);
}
-
-/* vim: set sw=8 sts=8 ts=8 noet : */