/* write_graphite plugin configuation example
*
* <Plugin write_graphite>
- * <Carbon "local-agent">
+ * <Carbon>
* Host "localhost"
- * Port 2003
+ * Port "2003"
* Prefix "collectd"
* </Carbon>
* </Plugin>
#include <netdb.h>
#ifndef WG_FORMAT_NAME
-#define WG_FORMAT_NAME(ret, ret_len, vl, prefix, name) \
+#define WG_FORMAT_NAME(ret, ret_len, vl, cb, name) \
wg_format_name (ret, ret_len, (vl)->host, (vl)->plugin, \
(vl)->plugin_instance, (vl)->type, \
- (vl)->type_instance, prefix, name)
+ (vl)->type_instance, (cb)->prefix, (cb)->postfix, \
+ name, (cb)->dotchar)
+#endif
+
+#ifndef WG_DEFAULT_NODE
+# define WG_DEFAULT_NODE "localhost"
+#endif
+
+#ifndef WG_DEFAULT_SERVICE
+# define WG_DEFAULT_SERVICE "2003"
#endif
#ifndef WG_SEND_BUF_SIZE
-#define WG_SEND_BUF_SIZE 4096
+# define WG_SEND_BUF_SIZE 4096
#endif
/*
*/
struct wg_callback
{
- char *name;
-
int sock_fd;
struct hostent *server;
- char *host;
- int port;
+ char *node;
+ char *service;
char *prefix;
+ char *postfix;
+ char dotchar;
char send_buf[WG_SEND_BUF_SIZE];
size_t send_buf_free;
status,
strerror (errno));
- pthread_mutex_lock (&cb->send_lock);
+ pthread_mutex_trylock (&cb->send_lock);
DEBUG ("write_graphite plugin: closing socket and restting fd "
"so reinit will occur");
static int wg_callback_init (struct wg_callback *cb)
{
+ struct addrinfo ai_hints;
+ struct addrinfo *ai_list;
+ struct addrinfo *ai_ptr;
int status;
- struct sockaddr_in serv_addr;
+ const char *node = cb->node ? cb->node : WG_DEFAULT_NODE;
+ const char *service = cb->service ? cb->service : WG_DEFAULT_SERVICE;
if (cb->sock_fd > 0)
return (0);
- cb->sock_fd = socket (AF_INET, SOCK_STREAM, 0);
- if (cb->sock_fd < 0)
+ memset (&ai_hints, 0, sizeof (ai_hints));
+#ifdef AI_ADDRCONFIG
+ ai_hints.ai_flags |= AI_ADDRCONFIG;
+#endif
+ ai_hints.ai_family = AF_UNSPEC;
+ ai_hints.ai_socktype = SOCK_STREAM;
+
+ ai_list = NULL;
+
+ status = getaddrinfo (node, service, &ai_hints, &ai_list);
+ if (status != 0)
{
- ERROR ("write_graphite plugin: socket failed: %s", strerror (errno));
+ ERROR ("write_graphite plugin: getaddrinfo (%s, %s) failed: %s",
+ node, service, gai_strerror (status));
return (-1);
}
- cb->server = gethostbyname(cb->host);
- if (cb->server == NULL)
+
+ assert (ai_list != NULL);
+ for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
{
- ERROR ("write_graphite plugin: no such host");
- return (-1);
+ cb->sock_fd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype,
+ ai_ptr->ai_protocol);
+ if (cb->sock_fd < 0)
+ continue;
+
+ status = connect (cb->sock_fd, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
+ if (status != 0)
+ {
+ close (cb->sock_fd);
+ cb->sock_fd = -1;
+ continue;
+ }
+
+ break;
}
- memset (&serv_addr, 0, sizeof (serv_addr));
- serv_addr.sin_family = AF_INET;
- memcpy (&serv_addr.sin_addr.s_addr,
- cb->server->h_addr,
- cb->server->h_length);
- serv_addr.sin_port = htons(cb->port);
-
- status = connect(cb->sock_fd,
- (struct sockaddr *) &serv_addr,
- sizeof(serv_addr));
- if (status < 0)
+
+ freeaddrinfo (ai_list);
+
+ if (cb->sock_fd < 0)
{
char errbuf[1024];
- sstrerror (errno, errbuf, sizeof (errbuf));
- ERROR ("write_graphite plugin: connect failed: %s", errbuf);
+ ERROR ("write_graphite plugin: Connecting to %s:%s failed. "
+ "The last error was: %s", node, service,
+ sstrerror (errno, errbuf, sizeof (errbuf)));
close (cb->sock_fd);
- cb->sock_fd = -1;
return (-1);
}
wg_flush_nolock (/* timeout = */ 0, cb);
close(cb->sock_fd);
- sfree(cb->name);
- sfree(cb->host);
+ sfree(cb->node);
+ sfree(cb->service);
sfree(cb->prefix);
+ sfree(cb->postfix);
sfree(cb);
}
return (0);
}
-static int normalize_hostname (char *dst, const char *src)
+static int swap_chars (char *dst, const char *src,
+ const char from, const char to)
{
size_t i;
for (i = 0; i < strlen(src) ; i++)
{
- if (src[i] == '.')
+ if (src[i] == from)
{
- dst[i] = '_';
+ dst[i] = to;
++reps;
}
else
const char *hostname,
const char *plugin, const char *plugin_instance,
const char *type, const char *type_instance,
- const char *prefix, const char *ds_name)
+ const char *prefix, const char *postfix,
+ const char *ds_name, const char dotchar)
{
int status;
- char *n_hostname;
+ char *n_hostname = 0;
+ char *n_type_instance = 0;
assert (plugin != NULL);
assert (type != NULL);
+ if (prefix == NULL)
+ prefix = "";
+
+ if (postfix == NULL)
+ postfix = "";
+
if ((n_hostname = malloc(strlen(hostname)+1)) == NULL)
{
ERROR ("Unable to allocate memory for normalized hostname buffer");
return (-1);
}
- if (normalize_hostname(n_hostname, hostname) == -1)
+ if (swap_chars(n_hostname, hostname, '.', dotchar) == -1)
{
ERROR ("Unable to normalize hostname");
return (-1);
}
+ if (type_instance && type_instance[0] != '\0') {
+ if ((n_type_instance = malloc(strlen(type_instance)+1)) == NULL)
+ {
+ ERROR ("Unable to allocate memory for normalized datasource name buffer");
+ return (-1);
+ }
+ if (swap_chars(n_type_instance, type_instance, '.', dotchar) == -1)
+ {
+ ERROR ("Unable to normalize datasource name");
+ return (-1);
+ }
+ }
+
if ((plugin_instance == NULL) || (plugin_instance[0] == '\0'))
{
- if ((type_instance == NULL) || (type_instance[0] == '\0'))
+ if ((n_type_instance == NULL) || (n_type_instance[0] == '\0'))
{
if ((ds_name == NULL) || (ds_name[0] == '\0'))
- status = ssnprintf (ret, ret_len, "%s.%s.%s.%s",
- prefix, n_hostname, plugin, type);
+ status = ssnprintf (ret, ret_len, "%s%s%s.%s.%s",
+ prefix, n_hostname, postfix, plugin, type);
else
- status = ssnprintf (ret, ret_len, "%s.%s.%s.%s.%s",
- prefix, n_hostname, plugin, type, ds_name);
+ status = ssnprintf (ret, ret_len, "%s%s%s.%s.%s.%s",
+ prefix, n_hostname, postfix, plugin, type, ds_name);
}
else
{
if ((ds_name == NULL) || (ds_name[0] == '\0'))
- status = ssnprintf (ret, ret_len, "%s.%s.%s.%s-%s",
- prefix, n_hostname, plugin, type,
- type_instance);
+ status = ssnprintf (ret, ret_len, "%s%s%s.%s.%s-%s",
+ prefix, n_hostname, postfix, plugin, type,
+ n_type_instance);
else
- status = ssnprintf (ret, ret_len, "%s.%s.%s.%s-%s.%s",
- prefix, n_hostname, plugin, type,
- type_instance, ds_name);
+ status = ssnprintf (ret, ret_len, "%s%s%s.%s.%s-%s.%s",
+ prefix, n_hostname, postfix, plugin, type,
+ n_type_instance, ds_name);
}
}
else
{
- if ((type_instance == NULL) || (type_instance[0] == '\0'))
+ if ((n_type_instance == NULL) || (n_type_instance[0] == '\0'))
{
if ((ds_name == NULL) || (ds_name[0] == '\0'))
- status = ssnprintf (ret, ret_len, "%s.%s.%s.%s.%s",
- prefix, n_hostname, plugin,
+ status = ssnprintf (ret, ret_len, "%s%s%s.%s.%s.%s",
+ prefix, n_hostname, postfix, plugin,
plugin_instance, type);
else
- status = ssnprintf (ret, ret_len, "%s.%s.%s.%s.%s.%s",
- prefix, n_hostname, plugin,
+ status = ssnprintf (ret, ret_len, "%s%s%s.%s.%s.%s.%s",
+ prefix, n_hostname, postfix, plugin,
plugin_instance, type, ds_name);
}
else
{
if ((ds_name == NULL) || (ds_name[0] == '\0'))
- status = ssnprintf (ret, ret_len, "%s.%s.%s.%s.%s-%s",
- prefix, n_hostname, plugin,
- plugin_instance, type, type_instance);
+ status = ssnprintf (ret, ret_len, "%s%s%s.%s.%s.%s-%s",
+ prefix, n_hostname, postfix, plugin,
+ plugin_instance, type, n_type_instance);
else
- status = ssnprintf (ret, ret_len, "%s.%s.%s.%s.%s-%s.%s",
- prefix, n_hostname, plugin,
- plugin_instance, type, type_instance, ds_name);
+ status = ssnprintf (ret, ret_len, "%s%s%s.%s.%s.%s-%s.%s",
+ prefix, n_hostname, postfix, plugin,
+ plugin_instance, type, n_type_instance, ds_name);
}
}
sfree(n_hostname);
+ sfree(n_type_instance);
if ((status < 1) || (status >= ret_len))
return (-1);
cb->send_buf_fill += message_len;
cb->send_buf_free -= message_len;
- DEBUG ("write_graphite plugin: <%s:%d> buf %zu/%zu (%g%%) \"%s\"",
- cb->host,
- cb->port,
+ DEBUG ("write_graphite plugin: <%s:%s> buf %zu/%zu (%g%%) \"%s\"",
+ cb->node,
+ cb->service,
cb->send_buf_fill, sizeof (cb->send_buf),
100.0 * ((double) cb->send_buf_fill) / ((double) sizeof (cb->send_buf)),
message);
for (i = 0; i < ds->ds_num; i++)
{
/* Copy the identifier to `key' and escape it. */
- status = WG_FORMAT_NAME (key, sizeof (key), vl, cb->prefix, \
- ds->ds[i].name);
+ status = WG_FORMAT_NAME (key, sizeof (key), vl, cb, ds->ds[i].name);
if (status != 0)
{
ERROR ("write_graphite plugin: error with format_name");
else
{
/* Copy the identifier to `key' and escape it. */
- status = WG_FORMAT_NAME (key, sizeof (key), vl, cb->prefix, NULL);
+ status = WG_FORMAT_NAME (key, sizeof (key), vl, cb, NULL);
if (status != 0)
{
ERROR ("write_graphite plugin: error with format_name");
return (status);
}
-static int config_set_number (int *dest,
- oconfig_item_t *ci)
-{
- if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
- {
- WARNING ("write_graphite plugin: The `%s' config option "
- "needs exactly one numeric argument.", ci->key);
- return (-1);
- }
-
- *dest = ci->values[0].value.number;
-
- return (0);
-}
-
-static int config_set_string (char **ret_string,
+static int config_set_char (char *dest,
oconfig_item_t *ci)
{
- char *string;
-
- if ((ci->values_num != 1)
- || (ci->values[0].type != OCONFIG_TYPE_STRING))
+ if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
{
WARNING ("write_graphite plugin: The `%s' config option "
"needs exactly one string argument.", ci->key);
return (-1);
}
- string = strdup (ci->values[0].value.string);
- if (string == NULL)
- {
- ERROR ("write_graphite plugin: strdup failed.");
- return (-1);
- }
-
- if (*ret_string != NULL)
- sfree (*ret_string);
- *ret_string = string;
+ *dest = ci->values[0].value.string[0];
return (0);
}
}
memset (cb, 0, sizeof (*cb));
cb->sock_fd = -1;
- cb->host = NULL;
- cb->name = NULL;
- cb->port = 2003;
+ cb->node = NULL;
+ cb->service = NULL;
cb->prefix = NULL;
+ cb->postfix = NULL;
cb->server = NULL;
+ cb->dotchar = '_';
pthread_mutex_init (&cb->send_lock, /* attr = */ NULL);
- config_set_string (&cb->name, ci);
- if (cb->name == NULL)
- return (-1);
-
for (i = 0; i < ci->children_num; i++)
{
oconfig_item_t *child = ci->children + i;
if (strcasecmp ("Host", child->key) == 0)
- config_set_string (&cb->host, child);
+ cf_util_get_string (child, &cb->node);
else if (strcasecmp ("Port", child->key) == 0)
- config_set_number (&cb->port, child);
+ cf_util_get_string (child, &cb->service);
else if (strcasecmp ("Prefix", child->key) == 0)
- config_set_string (&cb->prefix, child);
+ cf_util_get_string (child, &cb->prefix);
+ else if (strcasecmp ("Postfix", child->key) == 0)
+ cf_util_get_string (child, &cb->postfix);
+ else if (strcasecmp ("DotCharacter", child->key) == 0)
+ config_set_char (&cb->dotchar, child);
else
{
ERROR ("write_graphite plugin: Invalid configuration "
}
}
- DEBUG ("write_graphite: Registering write callback to carbon agent "
- "%s:%d", cb->host, cb->port);
+ DEBUG ("write_graphite: Registering write callback to carbon agent %s:%s",
+ cb->node ? cb->node : WG_DEFAULT_NODE,
+ cb->service ? cb->service : WG_DEFAULT_SERVICE);
memset (&user_data, 0, sizeof (user_data));
user_data.data = cb;
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