This repository has been archived by the owner on May 3, 2022. It is now read-only.
-
Notifications
You must be signed in to change notification settings - Fork 41
/
main.go
143 lines (114 loc) · 4.02 KB
/
main.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
package main
import (
"flag"
"net/http"
"os"
"os/signal"
"strconv"
"strings"
"syscall"
"time"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promhttp"
kubeinformers "k8s.io/client-go/informers"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/tools/clientcmd"
"k8s.io/klog"
shipper "github.com/bookingcom/shipper/pkg/apis/shipper/v1alpha1"
shipperclientset "github.com/bookingcom/shipper/pkg/client/clientset/versioned"
shipperinformers "github.com/bookingcom/shipper/pkg/client/informers/externalversions"
)
var (
masterURL = flag.String("master", "", "The address of the Kubernetes API server. Overrides any value in kubeconfig. Only required if out-of-cluster.")
kubeconfig = flag.String("kubeconfig", "", "Path to a kubeconfig. Only required if out-of-cluster.")
addr = flag.String("addr", ":8890", "Addr to expose /metrics on.")
ns = flag.String("namespace", shipper.ShipperNamespace, "Namespace for Shipper resources.")
relDurationBuckets = flag.String("release-duration-buckets", "15,30,45,60,120", "Comma-separated list of buckets for the shipper_objects_release_durations histogram, in seconds")
)
func main() {
klog.InitFlags(nil)
flag.Parse()
klog.Infof("Starting shipper-state-metrics on %s", *addr)
defer klog.Info("Stopping shipper-state-metrics")
restCfg, err := clientcmd.BuildConfigFromFlags(*masterURL, *kubeconfig)
if err != nil {
klog.Fatal(err)
}
shipperClient, err := shipperclientset.NewForConfig(restCfg)
if err != nil {
klog.Fatal(err)
}
kubeClient, err := kubernetes.NewForConfig(restCfg)
if err != nil {
klog.Fatal(err)
}
stopCh := setupSignalHandler()
resync := time.Second * 0
shipperInformerFactory := shipperinformers.NewSharedInformerFactory(shipperClient, resync)
kubeInformerFactory := kubeinformers.NewSharedInformerFactory(kubeClient, resync)
ssm := ShipperStateMetrics{
appsLister: shipperInformerFactory.Shipper().V1alpha1().Applications().Lister(),
relsLister: shipperInformerFactory.Shipper().V1alpha1().Releases().Lister(),
itsLister: shipperInformerFactory.Shipper().V1alpha1().InstallationTargets().Lister(),
ctsLister: shipperInformerFactory.Shipper().V1alpha1().CapacityTargets().Lister(),
ttsLister: shipperInformerFactory.Shipper().V1alpha1().TrafficTargets().Lister(),
clustersLister: shipperInformerFactory.Shipper().V1alpha1().Clusters().Lister(),
rbLister: shipperInformerFactory.Shipper().V1alpha1().RolloutBlocks().Lister(),
nssLister: kubeInformerFactory.Core().V1().Namespaces().Lister(),
secretsLister: kubeInformerFactory.Core().V1().Secrets().Lister(),
shipperNs: *ns,
releaseDurationBuckets: parseFloat64Slice(*relDurationBuckets),
}
prometheus.MustRegister(ssm)
shipperInformerFactory.Start(stopCh)
kubeInformerFactory.Start(stopCh)
shipperInformerFactory.WaitForCacheSync(stopCh)
kubeInformerFactory.WaitForCacheSync(stopCh)
go func() {
srv := http.Server{
Addr: *addr,
Handler: promhttp.HandlerFor(
prometheus.DefaultGatherer,
promhttp.HandlerOpts{
ErrorHandling: promhttp.ContinueOnError,
ErrorLog: klogStdLogger{},
},
),
}
err := srv.ListenAndServe()
if err != nil {
klog.Fatalf("could not start /metrics endpoint: %s", err)
}
}()
<-stopCh
}
func setupSignalHandler() <-chan struct{} {
stopCh := make(chan struct{})
sigCh := make(chan os.Signal, 2)
signal.Notify(sigCh, os.Interrupt, syscall.SIGTERM)
go func() {
<-sigCh
close(stopCh)
<-sigCh
os.Exit(1) // Second signal. Exit directly.
}()
return stopCh
}
func parseFloat64Slice(str string) []float64 {
strSlice := strings.Split(str, ",")
float64Slice := make([]float64, len(strSlice))
for i, b := range strSlice {
n, err := strconv.ParseFloat(b, 64)
if err != nil {
klog.Fatal(err)
}
float64Slice[i] = n
}
return float64Slice
}
type klogStdLogger struct{}
func (klogStdLogger) Println(v ...interface{}) {
// Prometheus only logs errors (which aren't fatal so we downgrade them to
// warnings).
klog.Warning(v...)
}