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Add Prometheus instrumentation and liveness/readiness probes

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This commit is contained in:
Stefan Prodan
2018-09-25 14:28:53 +03:00
parent b892048311
commit 6f68769150
4 changed files with 91 additions and 10 deletions
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16
cmd/controller/main.go
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@@ -5,13 +5,13 @@ import (
"log"
"time"
"github.com/golang/glog"
sharedclientset "github.com/knative/pkg/client/clientset/versioned"
"github.com/knative/pkg/signals"
clientset "github.com/stefanprodan/steerer/pkg/client/clientset/versioned"
informers "github.com/stefanprodan/steerer/pkg/client/informers/externalversions"
"github.com/stefanprodan/steerer/pkg/controller"
"github.com/stefanprodan/steerer/pkg/logging"
"github.com/stefanprodan/steerer/pkg/server"
"github.com/stefanprodan/steerer/pkg/version"
"go.uber.org/zap"
"k8s.io/client-go/kubernetes"
@@ -26,6 +26,7 @@ var (
metricServer string
rolloutWindow time.Duration
logLevel string
port string
)
func init() {
@@ -34,6 +35,7 @@ func init() {
flag.StringVar(&metricServer, "prometheus", "http://prometheus:9090", "Prometheus URL")
flag.DurationVar(&rolloutWindow, "window", 10*time.Second, "wait interval between deployment rollouts")
flag.StringVar(&logLevel, "level", "debug", "Log level can be: debug, info, warning, error.")
flag.StringVar(&port, "port", "8080", "Port to listen on.")
}
func main() {
@@ -64,7 +66,7 @@ func main() {
rolloutClient, err := clientset.NewForConfig(cfg)
if err != nil {
glog.Fatalf("Error building example clientset: %s", err.Error())
logger.Fatalf("Error building example clientset: %s", err.Error())
}
rolloutInformerFactory := informers.NewSharedInformerFactory(rolloutClient, time.Second*30)
@@ -81,6 +83,9 @@ func main() {
zap.String("metrics provider", metricServer),
zap.Any("kubernetes version", ver))
// start HTTP server
go server.ListenAndServe(port, 3*time.Second, logger, stopCh)
c := controller.NewController(
kubeClient,
sharedClient,
@@ -98,13 +103,14 @@ func main() {
rolloutInformer.Informer().HasSynced,
} {
if ok := cache.WaitForCacheSync(stopCh, synced); !ok {
logger.Fatalf("failed to wait for cache")
logger.Fatalf("Failed to wait for cache sync")
}
}
// start controller
go func(ctrl *controller.Controller) {
if runErr := ctrl.Run(2, stopCh); runErr != nil {
logger.Fatalf("Error running controller: %v", runErr)
if err := ctrl.Run(2, stopCh); err != nil {
logger.Fatalf("Error running controller: %v", err)
}
}(c)