/
http_probe.go
106 lines (97 loc) · 2.5 KB
/
http_probe.go
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package probe
import (
"context"
"net"
"net/http"
"net/url"
"strings"
"time"
"github.com/Sirupsen/logrus"
"github.com/goodrain/rainbond/node/nodem/client"
"github.com/goodrain/rainbond/node/nodem/service"
)
type HttpProbe struct {
Name string
Address string
ResultsChan chan *service.HealthStatus
Ctx context.Context
Cancel context.CancelFunc
TimeInterval int
HostNode *client.HostNode
MaxErrorsNum int
}
//Check check
func (h *HttpProbe) Check() {
go h.HTTPCheck()
}
//Stop stop
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 := GetHTTPHealth(h.Address)
result := &service.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 GetHTTPHealth(address string) map[string]string {
c := &http.Client{
Timeout: 10 * time.Second,
}
if !strings.HasPrefix(address, "http") {
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"
}
resp, err := c.Get(addr.String())
if err != nil {
if isClientTimeout(err) {
return map[string]string{"status": service.Stat_death, "info": "Request service timeout"}
}
logrus.Errorf("http probe request error %s", err.Error())
return map[string]string{"status": service.Stat_unhealthy, "info": err.Error()}
}
if resp.Body != nil {
defer resp.Body.Close()
}
if resp.StatusCode >= 500 {
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"}
}