99 lines
2.8 KiB
Go
99 lines
2.8 KiB
Go
/*
|
|
Copyright 2016 The Kubernetes Authors.
|
|
|
|
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 (
|
|
"fmt"
|
|
"io/ioutil"
|
|
"net/http"
|
|
"regexp"
|
|
"strconv"
|
|
)
|
|
|
|
var (
|
|
ac = regexp.MustCompile(`Active connections: (\d+)`)
|
|
sahr = regexp.MustCompile(`(\d+)\s(\d+)\s(\d+)`)
|
|
reading = regexp.MustCompile(`Reading: (\d+)`)
|
|
writing = regexp.MustCompile(`Writing: (\d+)`)
|
|
waiting = regexp.MustCompile(`Waiting: (\d+)`)
|
|
)
|
|
|
|
type nginxStatus struct {
|
|
// Active total number of active connections
|
|
Active int
|
|
// Accepted total number of accepted client connections
|
|
Accepted int
|
|
// Handled total number of handled connections. Generally, the parameter value is the same as accepts unless some resource limits have been reached (for example, the worker_connections limit).
|
|
Handled int
|
|
// Requests total number of client requests.
|
|
Requests int
|
|
// Reading current number of connections where nginx is reading the request header.
|
|
Reading int
|
|
// Writing current number of connections where nginx is writing the response back to the client.
|
|
Writing int
|
|
// Waiting current number of idle client connections waiting for a request.
|
|
Waiting int
|
|
}
|
|
|
|
func getNginxStatus() (*nginxStatus, error) {
|
|
resp, err := http.DefaultClient.Get(fmt.Sprintf("http://localhost:%v%v", ngxHealthPort, ngxStatusPath))
|
|
if err != nil {
|
|
return nil, fmt.Errorf("unexpected error scraping nginx status page: %v", err)
|
|
}
|
|
|
|
data, err := ioutil.ReadAll(resp.Body)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("unexpected error scraping nginx status page (%v)", err)
|
|
}
|
|
defer resp.Body.Close()
|
|
if resp.StatusCode < 200 || resp.StatusCode >= 400 {
|
|
return nil, fmt.Errorf("unexpected error scraping nginx status page (status %v)", resp.StatusCode)
|
|
}
|
|
|
|
return parse(string(data)), nil
|
|
}
|
|
|
|
func parse(data string) *nginxStatus {
|
|
acr := ac.FindStringSubmatch(data)
|
|
sahrr := sahr.FindStringSubmatch(data)
|
|
readingr := reading.FindStringSubmatch(data)
|
|
writingr := writing.FindStringSubmatch(data)
|
|
waitingr := waiting.FindStringSubmatch(data)
|
|
|
|
return &nginxStatus{
|
|
toInt(acr, 1),
|
|
toInt(sahrr, 1),
|
|
toInt(sahrr, 2),
|
|
toInt(sahrr, 3),
|
|
toInt(readingr, 1),
|
|
toInt(writingr, 1),
|
|
toInt(waitingr, 1),
|
|
}
|
|
}
|
|
|
|
func toInt(data []string, pos int) int {
|
|
if len(data) == 0 {
|
|
return 0
|
|
}
|
|
if pos > len(data) {
|
|
return 0
|
|
}
|
|
if v, err := strconv.Atoi(data[pos]); err == nil {
|
|
return v
|
|
}
|
|
return 0
|
|
}
|