#include "plugin.h"
#include "configfile.h"
-#include "utils_cache.h"
#include "utils_complain.h"
#include "utils_format_graphite.h"
-/* Folks without pthread will need to disable this plugin. */
-#include <pthread.h>
-
-#include <sys/socket.h>
#include <netdb.h>
#define WG_DEFAULT_NODE "localhost"
pthread_mutex_t send_lock;
c_complain_t init_complaint;
cdtime_t last_connect_time;
+
+ /* Force reconnect useful for load balanced environments */
+ cdtime_t last_reconnect_time;
+ cdtime_t reconnect_interval;
+ _Bool reconnect_interval_reached;
};
+/* wg_force_reconnect_check closes cb->sock_fd when it was open for longer
+ * than cb->reconnect_interval. Must hold cb->send_lock when calling. */
+static void wg_force_reconnect_check (struct wg_callback *cb)
+{
+ cdtime_t now;
+
+ if (cb->reconnect_interval == 0)
+ return;
+
+ /* check if address changes if addr_timeout */
+ now = cdtime ();
+ if ((now - cb->last_reconnect_time) < cb->reconnect_interval)
+ return;
+
+ /* here we should close connection on next */
+ close (cb->sock_fd);
+ cb->sock_fd = -1;
+ cb->last_reconnect_time = now;
+ cb->reconnect_interval_reached = 1;
+
+ INFO ("write_graphite plugin: Connection closed after %.3f seconds.",
+ CDTIME_T_TO_DOUBLE (now - cb->last_reconnect_time));
+}
/*
* Functions
static int wg_send_buffer (struct wg_callback *cb)
{
- ssize_t status = 0;
+ ssize_t status;
+
+ if (cb->sock_fd < 0)
+ return (-1);
status = swrite (cb->sock_fd, cb->send_buf, strlen (cb->send_buf));
- if (status < 0)
+ if (status != 0)
{
if (cb->log_send_errors)
{
return (0);
}
- if (cb->send_buf_fill <= 0)
+ if (cb->send_buf_fill == 0)
{
cb->send_buf_init_time = cdtime ();
return (0);
cb->node, cb->service, cb->protocol);
}
- wg_reset_buffer (cb);
+ /* wg_force_reconnect_check does not flush the buffer before closing a
+ * sending socket, so only call wg_reset_buffer() if the socket was closed
+ * for a different reason (tracked in cb->reconnect_interval_reached). */
+ if (!cb->reconnect_interval_reached || (cb->send_buf_free == 0))
+ wg_reset_buffer (cb);
+ else
+ cb->reconnect_interval_reached = 0;
return (0);
}
pthread_mutex_lock (&cb->send_lock);
+ wg_force_reconnect_check (cb);
+
if (cb->sock_fd < 0)
{
status = wg_callback_init (cb);
int i;
int status = 0;
- cb = malloc (sizeof (*cb));
+ cb = calloc (1, sizeof (*cb));
if (cb == NULL)
{
- ERROR ("write_graphite plugin: malloc failed.");
+ ERROR ("write_graphite plugin: calloc failed.");
return (-1);
}
- memset (cb, 0, sizeof (*cb));
cb->sock_fd = -1;
cb->name = NULL;
cb->node = strdup (WG_DEFAULT_NODE);
cb->service = strdup (WG_DEFAULT_SERVICE);
cb->protocol = strdup (WG_DEFAULT_PROTOCOL);
+ cb->last_reconnect_time = cdtime();
+ cb->reconnect_interval = 0;
+ cb->reconnect_interval_reached = 0;
cb->log_send_errors = WG_DEFAULT_LOG_SEND_ERRORS;
cb->prefix = NULL;
cb->postfix = NULL;
status = -1;
}
}
+ else if (strcasecmp ("ReconnectInterval", child->key) == 0)
+ cf_util_get_cdtime (child, &cb->reconnect_interval);
else if (strcasecmp ("LogSendErrors", child->key) == 0)
cf_util_get_boolean (child, &cb->log_send_errors);
else if (strcasecmp ("Prefix", child->key) == 0)