k8s.io/kubernetes@v1.31.0-alpha.0.0.20240520171757-56147500dadc/cmd/kube-controller-manager/app/apps.go (about)

     1  /*
     2  Copyright 2016 The Kubernetes Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  // Package app implements a server that runs a set of active
    18  // components.  This includes replication controllers, service endpoints and
    19  // nodes.
    20  package app
    21  
    22  import (
    23  	"context"
    24  	"fmt"
    25  	"time"
    26  
    27  	"k8s.io/client-go/util/flowcontrol"
    28  	"k8s.io/controller-manager/controller"
    29  	"k8s.io/kubernetes/cmd/kube-controller-manager/names"
    30  	"k8s.io/kubernetes/pkg/controller/daemon"
    31  	"k8s.io/kubernetes/pkg/controller/deployment"
    32  	"k8s.io/kubernetes/pkg/controller/replicaset"
    33  	"k8s.io/kubernetes/pkg/controller/statefulset"
    34  )
    35  
    36  func newDaemonSetControllerDescriptor() *ControllerDescriptor {
    37  	return &ControllerDescriptor{
    38  		name:     names.DaemonSetController,
    39  		aliases:  []string{"daemonset"},
    40  		initFunc: startDaemonSetController,
    41  	}
    42  }
    43  func startDaemonSetController(ctx context.Context, controllerContext ControllerContext, controllerName string) (controller.Interface, bool, error) {
    44  	dsc, err := daemon.NewDaemonSetsController(
    45  		ctx,
    46  		controllerContext.InformerFactory.Apps().V1().DaemonSets(),
    47  		controllerContext.InformerFactory.Apps().V1().ControllerRevisions(),
    48  		controllerContext.InformerFactory.Core().V1().Pods(),
    49  		controllerContext.InformerFactory.Core().V1().Nodes(),
    50  		controllerContext.ClientBuilder.ClientOrDie("daemon-set-controller"),
    51  		flowcontrol.NewBackOff(1*time.Second, 15*time.Minute),
    52  	)
    53  	if err != nil {
    54  		return nil, true, fmt.Errorf("error creating DaemonSets controller: %v", err)
    55  	}
    56  	go dsc.Run(ctx, int(controllerContext.ComponentConfig.DaemonSetController.ConcurrentDaemonSetSyncs))
    57  	return nil, true, nil
    58  }
    59  
    60  func newStatefulSetControllerDescriptor() *ControllerDescriptor {
    61  	return &ControllerDescriptor{
    62  		name:     names.StatefulSetController,
    63  		aliases:  []string{"statefulset"},
    64  		initFunc: startStatefulSetController,
    65  	}
    66  }
    67  func startStatefulSetController(ctx context.Context, controllerContext ControllerContext, controllerName string) (controller.Interface, bool, error) {
    68  	go statefulset.NewStatefulSetController(
    69  		ctx,
    70  		controllerContext.InformerFactory.Core().V1().Pods(),
    71  		controllerContext.InformerFactory.Apps().V1().StatefulSets(),
    72  		controllerContext.InformerFactory.Core().V1().PersistentVolumeClaims(),
    73  		controllerContext.InformerFactory.Apps().V1().ControllerRevisions(),
    74  		controllerContext.ClientBuilder.ClientOrDie("statefulset-controller"),
    75  	).Run(ctx, int(controllerContext.ComponentConfig.StatefulSetController.ConcurrentStatefulSetSyncs))
    76  	return nil, true, nil
    77  }
    78  
    79  func newReplicaSetControllerDescriptor() *ControllerDescriptor {
    80  	return &ControllerDescriptor{
    81  		name:     names.ReplicaSetController,
    82  		aliases:  []string{"replicaset"},
    83  		initFunc: startReplicaSetController,
    84  	}
    85  }
    86  
    87  func startReplicaSetController(ctx context.Context, controllerContext ControllerContext, controllerName string) (controller.Interface, bool, error) {
    88  	go replicaset.NewReplicaSetController(
    89  		ctx,
    90  		controllerContext.InformerFactory.Apps().V1().ReplicaSets(),
    91  		controllerContext.InformerFactory.Core().V1().Pods(),
    92  		controllerContext.ClientBuilder.ClientOrDie("replicaset-controller"),
    93  		replicaset.BurstReplicas,
    94  	).Run(ctx, int(controllerContext.ComponentConfig.ReplicaSetController.ConcurrentRSSyncs))
    95  	return nil, true, nil
    96  }
    97  
    98  func newDeploymentControllerDescriptor() *ControllerDescriptor {
    99  	return &ControllerDescriptor{
   100  		name:     names.DeploymentController,
   101  		aliases:  []string{"deployment"},
   102  		initFunc: startDeploymentController,
   103  	}
   104  }
   105  
   106  func startDeploymentController(ctx context.Context, controllerContext ControllerContext, controllerName string) (controller.Interface, bool, error) {
   107  	dc, err := deployment.NewDeploymentController(
   108  		ctx,
   109  		controllerContext.InformerFactory.Apps().V1().Deployments(),
   110  		controllerContext.InformerFactory.Apps().V1().ReplicaSets(),
   111  		controllerContext.InformerFactory.Core().V1().Pods(),
   112  		controllerContext.ClientBuilder.ClientOrDie("deployment-controller"),
   113  	)
   114  	if err != nil {
   115  		return nil, true, fmt.Errorf("error creating Deployment controller: %v", err)
   116  	}
   117  	go dc.Run(ctx, int(controllerContext.ComponentConfig.DeploymentController.ConcurrentDeploymentSyncs))
   118  	return nil, true, nil
   119  }