github.com/kubewharf/katalyst-core@v0.5.3/pkg/agent/sysadvisor/plugin/qosaware/server/server.go (about)

     1  /*
     2  Copyright 2022 The Katalyst 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 server
    18  
    19  import (
    20  	"context"
    21  	"fmt"
    22  
    23  	v1 "k8s.io/api/core/v1"
    24  	"k8s.io/klog/v2"
    25  
    26  	"github.com/kubewharf/katalyst-core/pkg/agent/sysadvisor/metacache"
    27  	"github.com/kubewharf/katalyst-core/pkg/agent/sysadvisor/plugin/qosaware/resource"
    28  	"github.com/kubewharf/katalyst-core/pkg/agent/sysadvisor/types"
    29  	"github.com/kubewharf/katalyst-core/pkg/config"
    30  	"github.com/kubewharf/katalyst-core/pkg/metaserver"
    31  	"github.com/kubewharf/katalyst-core/pkg/metrics"
    32  )
    33  
    34  // QRMServer is a wrapper of all qrm plugin servers, which synchronize and merge pod and
    35  // container lifecycle information, resource allocation and provision result with QRM plugins
    36  type QRMServer interface {
    37  	Run(ctx context.Context)
    38  }
    39  
    40  // subQRMServer is sub server of qrm server to synchronize information of
    41  // one resource dimension with a specific qrm plugin
    42  type subQRMServer interface {
    43  	Name() string
    44  	Start() error
    45  	Stop() error
    46  	// RegisterAdvisorServer registers resource server and its implementation to the gRPC server.
    47  	RegisterAdvisorServer()
    48  }
    49  
    50  type qrmServerWrapper struct {
    51  	serversToRun map[v1.ResourceName]subQRMServer
    52  }
    53  
    54  // NewQRMServer returns a qrm server wrapper, which instantiates
    55  // all required qrm plugin servers according to config
    56  func NewQRMServer(advisorWrapper resource.ResourceAdvisor, conf *config.Configuration,
    57  	metaCache metacache.MetaCache, metaServer *metaserver.MetaServer, emitter metrics.MetricEmitter,
    58  ) (QRMServer, error) {
    59  	qrmServer := qrmServerWrapper{
    60  		serversToRun: make(map[v1.ResourceName]subQRMServer),
    61  	}
    62  
    63  	for _, resourceNameStr := range conf.QRMServers {
    64  		resourceName := v1.ResourceName(resourceNameStr)
    65  		server, err := newSubQRMServer(resourceName, advisorWrapper, conf, metaCache, metaServer, emitter)
    66  		if err != nil {
    67  			return nil, fmt.Errorf("new qrm plugin server for %v failed: %v", resourceName, err)
    68  		} else {
    69  			qrmServer.serversToRun[resourceName] = server
    70  		}
    71  	}
    72  
    73  	return &qrmServer, nil
    74  }
    75  
    76  func (qs *qrmServerWrapper) Run(ctx context.Context) {
    77  	for _, server := range qs.serversToRun {
    78  		if err := server.Start(); err != nil {
    79  			klog.Errorf("[qosaware-server] start %v failed: %v", server.Name(), err)
    80  			return
    81  		}
    82  	}
    83  	<-ctx.Done()
    84  
    85  	for _, server := range qs.serversToRun {
    86  		if err := server.Stop(); err != nil {
    87  			klog.Errorf("[qosaware-server] stop %v failed: %v", server.Name(), err)
    88  		}
    89  	}
    90  }
    91  
    92  func newSubQRMServer(resourceName v1.ResourceName, advisorWrapper resource.ResourceAdvisor,
    93  	conf *config.Configuration, metaCache metacache.MetaCache, metaServer *metaserver.MetaServer, emitter metrics.MetricEmitter,
    94  ) (subQRMServer, error) {
    95  	switch resourceName {
    96  	case v1.ResourceCPU:
    97  		subAdvisor, err := advisorWrapper.GetSubAdvisor(types.QoSResourceCPU)
    98  		if err != nil {
    99  			return nil, err
   100  		}
   101  		advisorRecvChInterface, advisorSendChInterface := subAdvisor.GetChannels()
   102  		advisorRecvCh := advisorRecvChInterface.(chan types.TriggerInfo)
   103  		advisorSendCh := advisorSendChInterface.(chan types.InternalCPUCalculationResult)
   104  		return NewCPUServer(advisorSendCh, advisorRecvCh, conf, metaCache, metaServer, emitter)
   105  	case v1.ResourceMemory:
   106  		subAdvisor, err := advisorWrapper.GetSubAdvisor(types.QoSResourceMemory)
   107  		if err != nil {
   108  			return nil, err
   109  		}
   110  		advisorRecvChInterface, advisorSendChInterface := subAdvisor.GetChannels()
   111  		advisorRecvCh := advisorRecvChInterface.(chan types.TriggerInfo)
   112  		advisorSendCh := advisorSendChInterface.(chan types.InternalMemoryCalculationResult)
   113  		return NewMemoryServer(advisorSendCh, advisorRecvCh, conf, metaCache, metaServer, emitter)
   114  	default:
   115  		return nil, fmt.Errorf("illegal resource %v", resourceName)
   116  	}
   117  }