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receiving metrics snapshots (#74, #76)

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This commit is contained in:
Michael Quigley 2022-10-14 15:49:59 -04:00
parent b3c827a3fd
commit 318c73ad03
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1 changed files with 22 additions and 0 deletions
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22
controller/metrics.go
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@ -1,6 +1,9 @@
package controller
import (
"bytes"
"encoding/json"
"github.com/openziti-test-kitchen/zrok/model"
"github.com/openziti-test-kitchen/zrok/zrokdir"
"github.com/openziti/sdk-golang/ziti"
"github.com/openziti/sdk-golang/ziti/config"
@ -74,16 +77,20 @@ func (mtr *metricsAgent) bindService() error {
if err != nil {
return errors.Wrapf(err, "error listening for metrics on '%v'", mtr.cfg.ServiceName)
}
go mtr.listen()
return nil
}
func (mtr *metricsAgent) listen() {
logrus.Info("started")
defer logrus.Info("exited")
for {
conn, err := mtr.zListener.Accept()
if err != nil {
logrus.Errorf("error accepting: %v", err)
return
}
logrus.Infof("accepted metrics connetion from '%v'", conn.RemoteAddr())
go newMetricsHandler(conn).run()
}
}
@ -106,7 +113,22 @@ func newMetricsHandler(conn net.Conn) *metricsHandler {
func (mh *metricsHandler) run() {
logrus.Infof("handling metrics connection: %v", mh.conn.RemoteAddr())
var mtrBuf bytes.Buffer
buf := make([]byte, 4096)
for {
n, err := mh.conn.Read(buf)
if err != nil {
break
}
mtrBuf.Write(buf[:n])
}
if err := mh.conn.Close(); err != nil {
logrus.Errorf("error closing metrics connection")
}
mtr := &model.Metrics{}
if err := json.Unmarshal(mtrBuf.Bytes(), &mtr); err == nil {
logrus.Infof("received metrics snapshot from: %v", time.UnixMilli(mtr.LastUpdate))
} else {
logrus.Errorf("error unmarshaling metrics: %v", err)
}
}