forked from Edgio/vflow
/
stats.go
124 lines (110 loc) · 2.88 KB
/
stats.go
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//: ----------------------------------------------------------------------------
//: Copyright (C) 2017 Verizon. All Rights Reserved.
//: All Rights Reserved
//:
//: file: stats.go
//: details: exposes flow status
//: author: Mehrdad Arshad Rad
//: date: 02/01/2017
//:
//: Licensed under the Apache License, Version 2.0 (the "License");
//: you may not use this file except in compliance with the License.
//: You may obtain a copy of the License at
//:
//: http://www.apache.org/licenses/LICENSE-2.0
//:
//: Unless required by applicable law or agreed to in writing, software
//: distributed under the License is distributed on an "AS IS" BASIS,
//: WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//: See the License for the specific language governing permissions and
//: limitations under the License.
//: ----------------------------------------------------------------------------
package main
import (
"encoding/json"
"net"
"net/http"
"runtime"
"time"
)
var startTime = time.Now().Unix()
// StatsSysHandler handles /sys endpoint
func StatsSysHandler(w http.ResponseWriter, r *http.Request) {
var mem runtime.MemStats
runtime.ReadMemStats(&mem)
var data = &struct {
MemAlloc uint64
MemTotalAlloc uint64
MemHeapAlloc uint64
MemHeapSys uint64
MemHeapReleased uint64
MCacheInuse uint64
GCSys uint64
GCNext uint64
GCLast string
NumLogicalCPU int
NumGoroutine int
MaxProcs int
GoVersion string
StartTime int64
}{
mem.Alloc,
mem.TotalAlloc,
mem.HeapAlloc,
mem.HeapSys,
mem.HeapReleased,
mem.MCacheInuse,
mem.GCSys,
mem.NextGC,
time.Unix(0, int64(mem.LastGC)).String(),
runtime.NumCPU(),
runtime.NumGoroutine(),
runtime.GOMAXPROCS(-1),
runtime.Version(),
startTime,
}
j, err := json.Marshal(data)
if err != nil {
logger.Println(err)
}
if _, err = w.Write(j); err != nil {
logger.Println(err)
}
}
// StatsFlowHandler handles /flow endpoint
func StatsFlowHandler(i *IPFIX, s *SFlow, n *NetflowV9) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
var data = &struct {
StartTime int64
IPFIX *IPFIXStats
SFlow *SFlowStats
NetflowV9 *NetflowV9Stats
}{
startTime,
i.status(),
s.status(),
n.status(),
}
j, err := json.Marshal(data)
if err != nil {
logger.Println(err)
}
if _, err = w.Write(j); err != nil {
logger.Println(err)
}
}
}
func statsHTTPServer(ipfix *IPFIX, sflow *SFlow, netflow9 *NetflowV9) {
if !opts.StatsEnabled {
return
}
mux := http.NewServeMux()
mux.HandleFunc("/sys", StatsSysHandler)
mux.HandleFunc("/flow", StatsFlowHandler(ipfix, sflow, netflow9))
addr := net.JoinHostPort(opts.StatsHTTPAddr, opts.StatsHTTPPort)
logger.Println("starting stats web server ...")
err := http.ListenAndServe(addr, mux)
if err != nil {
logger.Fatal(err)
}
}