mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-12-21 12:30:24 +00:00
107 lines
2.6 KiB
Go
107 lines
2.6 KiB
Go
/*
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Copyright 2019 The Ceph-CSI Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package liveness
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import (
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"context"
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"net"
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"net/http"
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"os"
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"strconv"
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"time"
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connlib "github.com/kubernetes-csi/csi-lib-utils/connection"
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"github.com/kubernetes-csi/csi-lib-utils/rpc"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/client_golang/prometheus/promhttp"
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"k8s.io/klog"
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)
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var (
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liveness = prometheus.NewGauge(prometheus.GaugeOpts{
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Namespace: "csi",
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Name: "liveness",
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Help: "Liveness Probe",
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})
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)
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func getLiveness(endpoint string, timeout time.Duration) {
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csiConn, err := connlib.Connect(endpoint)
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if err != nil {
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// connlib should retry forever so a returned error should mean
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// the grpc client is misconfigured rather than an error on the network
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klog.Fatalf("failed to establish connection to CSI driver: %v", err)
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}
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ctx, cancel := context.WithTimeout(context.Background(), timeout)
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defer cancel()
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klog.Info("Sending probe request to CSI driver")
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ready, err := rpc.Probe(ctx, csiConn)
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if err != nil {
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liveness.Set(0)
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klog.Errorf("health check failed: %v", err)
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return
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}
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if !ready {
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liveness.Set(0)
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klog.Error("driver responded but is not ready")
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return
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}
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liveness.Set(1)
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klog.Infof("Health check succeeded")
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}
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func recordLiveness(endpoint string, pollTime, timeout time.Duration) {
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// register prometheus metrics
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err := prometheus.Register(liveness)
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if err != nil {
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klog.Fatalln(err)
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}
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// get liveness periodically
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ticker := time.NewTicker(pollTime)
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defer ticker.Stop()
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for range ticker.C {
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getLiveness(endpoint, timeout)
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}
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}
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func Run(endpoint, livenessendpoint string, port int, pollTime, timeout time.Duration) {
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klog.Infof("Liveness Running")
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ip := os.Getenv("POD_IP")
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if ip == "" {
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klog.Warning("missing POD_IP env var defaulting to 0.0.0.0")
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ip = "0.0.0.0"
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}
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// start liveness collection
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go recordLiveness(endpoint, pollTime, timeout)
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// start up prometheus endpoint
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addr := net.JoinHostPort(ip, strconv.Itoa(port))
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http.Handle(livenessendpoint, promhttp.Handler())
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err := http.ListenAndServe(addr, nil)
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if err != nil {
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klog.Fatalln(err)
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}
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}
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