Added the 'core.tcp_info' command to the exporter

README.md

@@ -34,10 +34,10 @@ Flags:
                              URI on which to scrape kamailio. E.g.
                              "unix:/var/run/kamailio/kamailio_ctl" or
                              "tcp://localhost:2049"
-  -m, --kamailio.methods="tm.stats,sl.stats,core.shmmem,core.uptime"
+  -m, --kamailio.methods="tm.stats,sl.stats,core.shmmem,core.uptime,core.tcp_info"
                              Comma-separated list of methods to call. E.g.
                              "tm.stats,sl.stats". Implemented:
-                             tm.stats,sl.stats,core.shmmem,core.uptime,dispatcher.list
+                             tm.stats,sl.stats,core.shmmem,core.uptime,core.tcp_info,dispatcher.list
   -t, --kamailio.timeout=5s  Timeout for trying to get stats from kamailio.
   ```
 
@@ -66,6 +66,12 @@ If you are using the [DISPATCHER](http://kamailio.org/docs/modules/stable/module
 ./kamailio_exporter -m "tm.stats,sl.stats,core.shmmem,core.uptime,dispatcher.list"
 ```
 
+If you want more information regarding TCP and TLS connections, you can use `core.tcp_info` as well:
+
+```bash
+./kamailio_exporter -m "tm.stats,sl.stats,core.shmmem,core.uptime,core.tcp_info"
+```
+
 List of exposed metrics:
 ```
 # HELP kamailio_core_shmmem_fragments Number of fragments in shared memory.
@@ -114,6 +120,18 @@ List of exposed metrics:
 # TYPE kamailio_tm_stats_waiting gauge
 # HELP kamailio_up Was the last scrape successful.
 # TYPE kamailio_up gauge
+# HELP kamailio_core_tcp_info_readers Total TCP readers.
+# TYPE kamailio_core_tcp_info_readers gauge
+# HELP kamailio_core_tcp_info_max_connections Maximum TCP connections.
+# TYPE kamailio_core_tcp_info_max_connections gauge
+# HELP kamailio_core_tcp_info_max_tls_connections Maximum TLS connections.
+# TYPE kamailio_core_tcp_info_max_tls_connections gauge
+# HELP kamailio_core_tcp_info_max_opened_connections Opened TCP connections.
+# TYPE kamailio_core_tcp_info_max_opened_connections gauge
+# HELP kamailio_core_tcp_info_max_opened_tls_connections Opened TLS connections.
+# TYPE kamailio_core_tcp_info_max_opened_tls_connections gauge
+# HELP kamailio_core_tcp_info_max_write_queued_bytes Write queued bytes.
+# TYPE kamailio_core_tcp_info_max_write_queued_bytes gauge
 ```
 
 ## Compiling

collector.go

@@ -68,6 +68,15 @@ kamcmd> core.shmmem
         max_used: 13323296
         fragments: 44546
 }
+kamcmd> core.tcp_info
+{
+	readers: 8
+	max_connections: 4096
+	max_tls_connections: 2048
+	opened_connections: 595
+	opened_tls_connections: 401
+	write_queued_bytes: 0
+}
 */
 
 // Collector implements prometheus.Collector (see below).
@@ -122,6 +131,7 @@ var (
 		"sl.stats",
 		"core.shmmem",
 		"core.uptime",
+		"core.tcp_info",
 		"dispatcher.list",
 	}
 
@@ -153,6 +163,14 @@ var (
 		"core.uptime": {
 			NewMetricCounter("uptime", "Uptime in seconds.", "core.uptime"),
 		},
+		"core.tcp_info": {
+			NewMetricGauge("readers", "Total TCP readers.", "core.tcp_info"),
+			NewMetricGauge("max_connections", "Maximum TCP connections", "core.tcp_info"),
+			NewMetricGauge("max_tls_connections", "Maximum TLS connections.", "core.tcp_info"),
+			NewMetricGauge("opened_connections", "Opened TCP connections.", "core.tcp_info"),
+			NewMetricGauge("opened_tls_connections", "Opened TLS connections.", "core.tcp_info"),
+			NewMetricGauge("write_queued_bytes", "Write queued bytes.", "core.tcp_info"),
+		},
 		"dispatcher.list": {
 			NewMetricGauge("target", "Target status.", "dispatcher.list"),
 		},
@@ -401,6 +419,8 @@ func (c *Collector) scrapeMethod(method string) (map[string][]MetricValue, error
 		}
 	case "core.shmmem":
 		fallthrough
+	case "core.tcp_info":
+		fallthrough
 	case "core.uptime":
 		for _, item := range items {
 			i, _ := item.Value.Int()