--- /dev/null
+/**
+ * collectd - src/zookeeper.c
+ * Copyright (C) 2014 Google, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Authors:
+ * Jeremy Katz <jeremy at katzbox.net>
+ **/
+
+#include "collectd.h"
+#include "common.h"
+#include "plugin.h"
+
+#include <netdb.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <netinet/in.h>
+#include <netinet/tcp.h>
+
+#define ZOOKEEPER_DEF_HOST "127.0.0.1"
+#define ZOOKEEPER_DEF_PORT "2181"
+
+static char *zk_host = NULL;
+static char *zk_port = NULL;
+
+static const char *config_keys[] =
+{
+ "Host",
+ "Port"
+};
+static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
+
+static int zookeeper_config(const char *key, const char *value)
+{
+ if (strncmp(key, "Host", strlen("Host")) == 0)
+ {
+ sfree (zk_host);
+ zk_host = strdup (value);
+ }
+ else if (strncmp(key, "Port", strlen("Port")) == 0)
+ {
+ sfree (zk_port);
+ zk_port = strdup (value);
+ }
+ else
+ {
+ return -1;
+ }
+ return 0;
+}
+
+static void zookeeper_submit_gauge (const char * type, const char * type_inst, gauge_t val)
+{
+ value_t values[1];
+ value_list_t vl = VALUE_LIST_INIT;
+
+ values[0].gauge = val;
+
+ vl.values = values;
+ vl.values_len = 1;
+ sstrncpy (vl.host, hostname_g, sizeof (vl.host));
+ sstrncpy (vl.plugin, "zookeeper", sizeof (vl.plugin));
+ sstrncpy (vl.type, type, sizeof (vl.type));
+ if (type_inst != NULL)
+ sstrncpy (vl.type_instance, type_inst, sizeof (vl.type_instance));
+
+ plugin_dispatch_values (&vl);
+} /* zookeeper_submit_gauge */
+
+static void zookeeper_submit_derive (const char * type, const char * type_inst, derive_t val)
+{
+ value_t values[1];
+ value_list_t vl = VALUE_LIST_INIT;
+
+ values[0].derive = val;
+
+ vl.values = values;
+ vl.values_len = 1;
+ sstrncpy (vl.host, hostname_g, sizeof (vl.host));
+ sstrncpy (vl.plugin, "zookeeper", sizeof (vl.plugin));
+ sstrncpy (vl.type, type, sizeof (vl.type));
+ if (type_inst != NULL)
+ sstrncpy (vl.type_instance, type_inst, sizeof (vl.type_instance));
+
+ plugin_dispatch_values (&vl);
+} /* zookeeper_submit_derive */
+
+static int zookeeper_connect (void)
+{
+ int sk;
+ int status;
+ struct addrinfo ai_hints;
+ struct addrinfo *ai;
+ struct addrinfo *ai_list;
+ char *host;
+ char *port;
+
+ memset ((void *) &ai_hints, '\0', sizeof (ai_hints));
+ ai_hints.ai_family = AF_UNSPEC;
+ ai_hints.ai_socktype = SOCK_STREAM;
+
+ host = (zk_host != NULL) ? zk_host : ZOOKEEPER_DEF_HOST;
+ port = (zk_port != NULL) ? zk_port : ZOOKEEPER_DEF_PORT;
+ status = getaddrinfo (host, port, &ai_hints, &ai_list);
+ if (status != 0)
+ {
+ char errbuf[1024];
+ INFO ("getaddrinfo failed: %s",
+ (status == EAI_SYSTEM)
+ ? sstrerror (errno, errbuf, sizeof (errbuf))
+ : gai_strerror (status));
+ return (-1);
+ }
+
+ for (ai = ai_list; ai != NULL; ai = ai->ai_next)
+ {
+ sk = socket (ai->ai_family, SOCK_STREAM, 0);
+ if (sk < 0)
+ {
+ char errbuf[1024];
+ WARNING ("zookeeper: socket(2) failed: %s",
+ sstrerror (errno, errbuf, sizeof(errbuf)));
+ continue;
+ }
+ status = (int) connect (sk, ai->ai_addr, ai->ai_addrlen);
+ if (status != 0)
+ {
+ char errbuf[1024];
+ close (sk);
+ sk = -1;
+ WARNING ("zookeeper: connect(2) failed: %s",
+ sstrerror (errno, errbuf, sizeof(errbuf)));
+ continue;
+ }
+
+ /* connected */
+ break;
+ }
+
+ freeaddrinfo(ai_list);
+ return (sk);
+} /* int zookeeper_connect */
+
+static int zookeeper_query (char *buffer, size_t buffer_size)
+{
+ int sk = -1;
+ int status;
+ size_t buffer_fill;
+
+ sk = zookeeper_connect();
+ if (sk < 0)
+ {
+ ERROR ("zookeeper: Could not connect to daemon");
+ return (-1);
+ }
+
+ status = (int) swrite (sk, "mntr\r\n", strlen("mntr\r\n"));
+ if (status != 0)
+ {
+ char errbuf[1024];
+ ERROR ("zookeeper: write(2) failed: %s",
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+ close (sk);
+ return (-1);
+ }
+
+ memset (buffer, 0, buffer_size);
+ buffer_fill = 0;
+
+ while ((status = (int) recv (sk, buffer + buffer_fill,
+ buffer_size - buffer_fill, /* flags = */ 0)) != 0)
+ {
+ if (status < 0)
+ {
+ char errbuf[1024];
+ if ((errno == EAGAIN) || (errno == EINTR))
+ continue;
+ ERROR ("zookeeper: Error reading from socket: %s",
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+ close (sk);
+ return (-1);
+ }
+
+ buffer_fill += (size_t) status;
+ if (status == 0)
+ {
+ /* done reading from the socket */
+ break;
+ }
+ } /* while (recv) */
+
+ status = 0;
+ if (buffer_fill == 0)
+ {
+ WARNING ("zookeeper: No data returned by MNTR command.");
+ status = -1;
+ }
+
+ close(sk);
+ return (status);
+} /* int zookeeper_query */
+
+
+static int zookeeper_read (void) {
+ char buf[4096];
+ char *ptr;
+ char *save_ptr;
+ char *line;
+ char *fields[2];
+
+ if (zookeeper_query (buf, sizeof (buf)) < 0)
+ {
+ return (-1);
+ }
+
+ ptr = buf;
+ save_ptr = NULL;
+ while ((line = strtok_r (ptr, "\n\r", &save_ptr)) != NULL)
+ {
+ ptr = NULL;
+ if (strsplit(line, fields, 2) != 2)
+ {
+ continue;
+ }
+#define FIELD_CHECK(check, expected) \
+ (strncmp (check, expected, strlen(expected)) == 0)
+
+ if (FIELD_CHECK (fields[0], "zk_avg_latency"))
+ {
+ zookeeper_submit_gauge ("latency", "avg", atol(fields[1]));
+ }
+ else if (FIELD_CHECK(fields[0], "zk_min_latency"))
+ {
+ zookeeper_submit_gauge ("latency", "min", atol(fields[1]));
+ }
+ else if (FIELD_CHECK (fields[0], "zk_max_latency"))
+ {
+ zookeeper_submit_gauge ("latency", "max", atol(fields[1]));
+ }
+ else if (FIELD_CHECK (fields[0], "zk_packets_received"))
+ {
+ zookeeper_submit_derive ("packets", "received", atol(fields[1]));
+ }
+ else if (FIELD_CHECK (fields[0], "zk_packets_sent"))
+ {
+ zookeeper_submit_derive ("packets", "sent", atol(fields[1]));
+ }
+ else if (FIELD_CHECK (fields[0], "zk_num_alive_connections"))
+ {
+ zookeeper_submit_gauge ("current_connections", NULL, atol(fields[1]));
+ }
+ else if (FIELD_CHECK (fields[0], "zk_outstanding_requests"))
+ {
+ zookeeper_submit_gauge ("requests", "outstanding", atol(fields[1]));
+ }
+ else if (FIELD_CHECK (fields[0], "zk_znode_count"))
+ {
+ zookeeper_submit_gauge ("count", "znode", atol(fields[1]));
+ }
+ else if (FIELD_CHECK (fields[0], "zk_watch_count"))
+ {
+ zookeeper_submit_gauge ("count", "watch", atol(fields[1]));
+ }
+ else if (FIELD_CHECK (fields[0], "zk_ephemerals_count"))
+ {
+ zookeeper_submit_gauge ("count", "ephemerals", atol(fields[1]));
+ }
+ else if (FIELD_CHECK (fields[0], "zk_ephemerals_count"))
+ {
+ zookeeper_submit_gauge ("count", "ephemerals", atol(fields[1]));
+ }
+ else if (FIELD_CHECK (fields[0], "zk_ephemerals_count"))
+ {
+ zookeeper_submit_gauge ("count", "ephemerals", atol(fields[1]));
+ }
+ else if (FIELD_CHECK (fields[0], "zk_approximate_data_size"))
+ {
+ zookeeper_submit_gauge ("zk_approximate_data_size", NULL, atol(fields[1]));
+ }
+ else if (FIELD_CHECK (fields[0], "zk_followers"))
+ {
+ zookeeper_submit_gauge ("count", "followers", atol(fields[1]));
+ }
+ else if (FIELD_CHECK (fields[0], "zk_synced_followers"))
+ {
+ zookeeper_submit_gauge ("count", "synced_followers", atol(fields[1]));
+ }
+ else if (FIELD_CHECK (fields[0], "zk_pending_syncs"))
+ {
+ zookeeper_submit_gauge ("count", "pending_syncs", atol(fields[1]));
+ }
+ else
+ {
+ DEBUG("Uncollected zookeeper MNTR field %s", fields[0]);
+ }
+ }
+
+ return (0);
+} /* zookeeper_read */
+
+void module_register (void)
+{
+ plugin_register_config ("zookeeper", zookeeper_config, config_keys, config_keys_num);
+ plugin_register_read ("zookeeper", zookeeper_read);
+} /* void module_register */
projects / collectd.git / commitdiff