mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-11-26 16:20:28 +00:00
107 lines
2.6 KiB
Go
107 lines
2.6 KiB
Go
/*
|
|
Copyright 2019 The Ceph-CSI 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 liveness
|
|
|
|
import (
|
|
"context"
|
|
"net"
|
|
"net/http"
|
|
"os"
|
|
"strconv"
|
|
"time"
|
|
|
|
connlib "github.com/kubernetes-csi/csi-lib-utils/connection"
|
|
"github.com/kubernetes-csi/csi-lib-utils/rpc"
|
|
"github.com/prometheus/client_golang/prometheus"
|
|
"github.com/prometheus/client_golang/prometheus/promhttp"
|
|
"k8s.io/klog"
|
|
)
|
|
|
|
var (
|
|
liveness = prometheus.NewGauge(prometheus.GaugeOpts{
|
|
Namespace: "csi",
|
|
Name: "liveness",
|
|
Help: "Liveness Probe",
|
|
})
|
|
)
|
|
|
|
func getLiveness(endpoint string, timeout time.Duration) {
|
|
|
|
csiConn, err := connlib.Connect(endpoint)
|
|
if err != nil {
|
|
// connlib should retry forever so a returned error should mean
|
|
// the grpc client is misconfigured rather than an error on the network
|
|
klog.Fatalf("failed to establish connection to CSI driver: %v", err)
|
|
}
|
|
|
|
ctx, cancel := context.WithTimeout(context.Background(), timeout)
|
|
defer cancel()
|
|
|
|
klog.Info("Sending probe request to CSI driver")
|
|
ready, err := rpc.Probe(ctx, csiConn)
|
|
if err != nil {
|
|
liveness.Set(0)
|
|
klog.Errorf("health check failed: %v", err)
|
|
return
|
|
}
|
|
|
|
if !ready {
|
|
liveness.Set(0)
|
|
klog.Error("driver responded but is not ready")
|
|
return
|
|
}
|
|
liveness.Set(1)
|
|
klog.Infof("Health check succeeded")
|
|
}
|
|
|
|
func recordLiveness(endpoint string, pollTime, timeout time.Duration) {
|
|
// register prometheus metrics
|
|
err := prometheus.Register(liveness)
|
|
if err != nil {
|
|
klog.Fatalln(err)
|
|
}
|
|
|
|
// get liveness periodically
|
|
ticker := time.NewTicker(pollTime)
|
|
defer ticker.Stop()
|
|
for range ticker.C {
|
|
getLiveness(endpoint, timeout)
|
|
}
|
|
}
|
|
|
|
func Run(endpoint, livenessendpoint string, port int, pollTime, timeout time.Duration) {
|
|
klog.Infof("Liveness Running")
|
|
|
|
ip := os.Getenv("POD_IP")
|
|
|
|
if ip == "" {
|
|
klog.Warning("missing POD_IP env var defaulting to 0.0.0.0")
|
|
ip = "0.0.0.0"
|
|
}
|
|
|
|
// start liveness collection
|
|
go recordLiveness(endpoint, pollTime, timeout)
|
|
|
|
// start up prometheus endpoint
|
|
addr := net.JoinHostPort(ip, strconv.Itoa(port))
|
|
http.Handle(livenessendpoint, promhttp.Handler())
|
|
err := http.ListenAndServe(addr, nil)
|
|
if err != nil {
|
|
klog.Fatalln(err)
|
|
}
|
|
}
|