forked from goodrain/rainbond
/
http.go
133 lines (121 loc) · 3.79 KB
/
http.go
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// RAINBOND, Application Management Platform
// Copyright (C) 2014-2017 Goodrain Co., Ltd.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version. For any non-GPL usage of Rainbond,
// one or multiple Commercial Licenses authorized by Goodrain Co., Ltd.
// must be obtained first.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package probe
import (
"context"
"crypto/tls"
"net"
"net/http"
"net/url"
"strings"
"time"
"github.com/Sirupsen/logrus"
"github.com/goodrain/rainbond/node/nodem/service"
v1 "github.com/goodrain/rainbond/util/prober/types/v1"
)
// HTTPProbe probes through the http protocol
type HTTPProbe struct {
Name string
Address string
ResultsChan chan *v1.HealthStatus
Ctx context.Context
Cancel context.CancelFunc
TimeInterval int
MaxErrorsNum int
TimeoutSecond int
}
//Check starts http probe.
func (h *HTTPProbe) Check() {
go h.HTTPCheck()
}
//Stop stops http probe.
func (h *HTTPProbe) Stop() {
h.Cancel()
}
//HTTPCheck http check
func (h *HTTPProbe) HTTPCheck() {
if h.TimeInterval == 0 {
h.TimeInterval = 5
}
timer := time.NewTimer(time.Second * time.Duration(h.TimeInterval))
defer timer.Stop()
for {
HealthMap := h.GetHTTPHealth()
result := &v1.HealthStatus{
Name: h.Name,
Status: HealthMap["status"],
Info: HealthMap["info"],
}
h.ResultsChan <- result
timer.Reset(time.Second * time.Duration(h.TimeInterval))
select {
case <-h.Ctx.Done():
return
case <-timer.C:
}
}
}
// Return true if the underlying error indicates a http.Client timeout.
//
// Use for errors returned from http.Client methods (Get, Post).
func isClientTimeout(err error) bool {
if uerr, ok := err.(*url.Error); ok {
if nerr, ok := uerr.Err.(net.Error); ok && nerr.Timeout() {
return true
}
}
return false
}
//GetHTTPHealth get http health
func (h *HTTPProbe) GetHTTPHealth() map[string]string {
address := h.Address
c := &http.Client{
Timeout: time.Duration(h.TimeoutSecond) * time.Second,
}
if strings.HasPrefix(address, "https://") {
c.Transport = &http.Transport{
TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
}
}
if !strings.HasPrefix(address, "http://") && !strings.HasPrefix(address, "https://") {
logrus.Warnf("address %s do not has scheme, auto add http scheme", address)
address = "http://" + address
}
addr, err := url.Parse(address)
if err != nil {
logrus.Errorf("%s is invalid %s", address, err.Error())
return map[string]string{"status": service.Stat_healthy, "info": "check url is invalid"}
}
if addr.Scheme == "" {
addr.Scheme = "http"
}
logrus.Debugf("http probe check address; %s", address)
resp, err := c.Get(addr.String())
if resp != nil && resp.Body != nil {
defer resp.Body.Close()
}
if err != nil {
if isClientTimeout(err) {
return map[string]string{"status": service.Stat_death, "info": "Request service timeout"}
}
logrus.Debugf("http probe request error %s", err.Error())
return map[string]string{"status": service.Stat_unhealthy, "info": err.Error()}
}
if resp.StatusCode >= 400 {
logrus.Debugf("http probe check address %s return code %d", address, resp.StatusCode)
return map[string]string{"status": service.Stat_unhealthy, "info": "Service unhealthy"}
}
return map[string]string{"status": service.Stat_healthy, "info": "service health"}
}