mirror of
https://github.com/kubernetes-sigs/descheduler.git
synced 2026-01-26 21:31:18 +01:00
116 lines
3.2 KiB
Go
116 lines
3.2 KiB
Go
/*
|
|
Copyright 2017 The Kubernetes 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 app implements a Server object for running the descheduler.
|
|
package app
|
|
|
|
import (
|
|
"context"
|
|
"io"
|
|
"os/signal"
|
|
"syscall"
|
|
|
|
"k8s.io/apiserver/pkg/server/healthz"
|
|
|
|
"sigs.k8s.io/descheduler/cmd/descheduler/app/options"
|
|
"sigs.k8s.io/descheduler/pkg/descheduler"
|
|
|
|
"github.com/spf13/cobra"
|
|
|
|
apiserver "k8s.io/apiserver/pkg/server"
|
|
"k8s.io/apiserver/pkg/server/mux"
|
|
restclient "k8s.io/client-go/rest"
|
|
registry "k8s.io/component-base/logs/api/v1"
|
|
jsonLog "k8s.io/component-base/logs/json"
|
|
_ "k8s.io/component-base/logs/json/register"
|
|
"k8s.io/component-base/metrics/legacyregistry"
|
|
"k8s.io/klog/v2"
|
|
)
|
|
|
|
// NewDeschedulerCommand creates a *cobra.Command object with default parameters
|
|
func NewDeschedulerCommand(out io.Writer) *cobra.Command {
|
|
s, err := options.NewDeschedulerServer()
|
|
|
|
if err != nil {
|
|
klog.ErrorS(err, "unable to initialize server")
|
|
}
|
|
|
|
cmd := &cobra.Command{
|
|
Use: "descheduler",
|
|
Short: "descheduler",
|
|
Long: `The descheduler evicts pods which may be bound to less desired nodes`,
|
|
Run: func(cmd *cobra.Command, args []string) {
|
|
// s.Logs.Config.Format = s.Logging.Format
|
|
|
|
// LoopbackClientConfig is a config for a privileged loopback connection
|
|
var LoopbackClientConfig *restclient.Config
|
|
var SecureServing *apiserver.SecureServingInfo
|
|
if err := s.SecureServing.ApplyTo(&SecureServing, &LoopbackClientConfig); err != nil {
|
|
klog.ErrorS(err, "failed to apply secure server configuration")
|
|
return
|
|
}
|
|
var factory registry.LogFormatFactory
|
|
|
|
if s.Logging.Format == "json" {
|
|
factory = jsonLog.Factory{}
|
|
}
|
|
|
|
if factory == nil {
|
|
klog.ClearLogger()
|
|
} else {
|
|
log, logrFlush := factory.Create(registry.LoggingConfiguration{
|
|
Format: s.Logging.Format,
|
|
Verbosity: s.Logging.Verbosity,
|
|
})
|
|
defer logrFlush()
|
|
klog.SetLogger(log)
|
|
}
|
|
|
|
ctx, done := signal.NotifyContext(context.Background(), syscall.SIGINT, syscall.SIGTERM)
|
|
|
|
pathRecorderMux := mux.NewPathRecorderMux("descheduler")
|
|
if !s.DisableMetrics {
|
|
pathRecorderMux.Handle("/metrics", legacyregistry.HandlerWithReset())
|
|
}
|
|
|
|
healthz.InstallHandler(pathRecorderMux, healthz.NamedCheck("Descheduler", healthz.PingHealthz.Check))
|
|
|
|
stoppedCh, _, err := SecureServing.Serve(pathRecorderMux, 0, ctx.Done())
|
|
if err != nil {
|
|
klog.Fatalf("failed to start secure server: %v", err)
|
|
return
|
|
}
|
|
|
|
err = Run(ctx, s)
|
|
if err != nil {
|
|
klog.ErrorS(err, "descheduler server")
|
|
}
|
|
|
|
done()
|
|
// wait for metrics server to close
|
|
<-stoppedCh
|
|
},
|
|
}
|
|
cmd.SetOut(out)
|
|
flags := cmd.Flags()
|
|
s.AddFlags(flags)
|
|
return cmd
|
|
}
|
|
|
|
func Run(ctx context.Context, rs *options.DeschedulerServer) error {
|
|
return descheduler.Run(ctx, rs)
|
|
}
|