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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,140 @@ | ||
| /* | ||
| Copyright 2021 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 grpcplugin | ||
|
|
||
| import ( | ||
| "context" | ||
| "log" | ||
| "time" | ||
|
|
||
| v1 "k8s.io/api/core/v1" | ||
| "k8s.io/autoscaler/cluster-autoscaler/expander" | ||
| "k8s.io/autoscaler/cluster-autoscaler/expander/grpcplugin/protos" | ||
| "k8s.io/klog/v2" | ||
| schedulerframework "k8s.io/kubernetes/pkg/scheduler/framework" | ||
|
|
||
| "google.golang.org/grpc" | ||
| "google.golang.org/grpc/credentials" | ||
| ) | ||
|
|
||
| type grpcclientstrategy struct { | ||
| grpcClient protos.ExpanderClient | ||
| } | ||
|
|
||
| // NewFilter returns an expansion filter that creates a gRPC client, and calls out to a gRPC server | ||
| func NewFilter(expanderCert string, expanderUrl string) expander.Filter { | ||
| client := createGRPCClient(expanderCert, expanderUrl) | ||
| if client == nil { | ||
| return &grpcclientstrategy{grpcClient: nil} | ||
| } | ||
| return &grpcclientstrategy{grpcClient: client} | ||
| } | ||
|
|
||
| func createGRPCClient(expanderCert string, expanderUrl string) protos.ExpanderClient { | ||
| var dialOpt grpc.DialOption | ||
|
|
||
| // if no Cert file specified, use insecure | ||
| if expanderCert == "" { | ||
| dialOpt = grpc.WithInsecure() | ||
| } else { | ||
| creds, err := credentials.NewClientTLSFromFile(expanderCert, "") | ||
| if err != nil { | ||
| log.Fatalf("Failed to create TLS credentials %v", err) | ||
| return nil | ||
| } | ||
| dialOpt = grpc.WithTransportCredentials(creds) | ||
| } | ||
| klog.V(2).Info("Dialing ", expanderUrl, " dialopt: ", dialOpt) | ||
| conn, err := grpc.Dial(expanderUrl, dialOpt) | ||
| if err != nil { | ||
| log.Fatalf("fail to dial server: %v", err) | ||
| return nil | ||
| } | ||
| return protos.NewExpanderClient(conn) | ||
| } | ||
|
|
||
| func (g *grpcclientstrategy) BestOptions(expansionOptions []expander.Option, nodeInfo map[string]*schedulerframework.NodeInfo) []expander.Option { | ||
| if g.grpcClient == nil { | ||
| log.Fatalf("Incorrect gRPC client config, filtering no options") | ||
| return expansionOptions | ||
| } | ||
|
|
||
| // Transform inputs to gRPC inputs | ||
| nodeGroupIDOptionMap := make(map[string]expander.Option) | ||
| grpcOptionsSlice := []*protos.Option{} | ||
| populateOptionsForGRPC(expansionOptions, nodeGroupIDOptionMap, &grpcOptionsSlice) | ||
| grpcNodeInfoMap := make(map[string]*v1.Node) | ||
| populateNodeInfoForGRPC(nodeInfo, grpcNodeInfoMap) | ||
|
|
||
| // call gRPC server to get BestOption | ||
| klog.V(2).Info("GPRC call of best options to server with ", len(nodeGroupIDOptionMap), " options") | ||
| ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second) | ||
| defer cancel() | ||
| bestOptionsResponse, err := g.grpcClient.BestOptions(ctx, &protos.BestOptionsRequest{Options: grpcOptionsSlice, NodeInfoMap: grpcNodeInfoMap}) | ||
| if err != nil { | ||
| klog.V(2).Info("GRPC call timed out, no options filtered") | ||
| return expansionOptions | ||
| } | ||
|
|
||
| if bestOptionsResponse == nil || bestOptionsResponse.Options == nil { | ||
| klog.V(2).Info("GRPC returned nil bestOptions, no options filtered") | ||
| return expansionOptions | ||
| } | ||
| // Transform back options slice | ||
| options := transformAndSanitizeOptionsFromGRPC(bestOptionsResponse.Options, nodeGroupIDOptionMap) | ||
| if options == nil { | ||
| klog.V(2).Info("Unable to sanitize GPRC returned bestOptions, no options filtered") | ||
| return expansionOptions | ||
| } | ||
| return options | ||
| } | ||
|
|
||
| // populateOptionsForGRPC creates a map of nodegroup ID and options, as well as a slice of Options objects for the gRPC call | ||
| func populateOptionsForGRPC(expansionOptions []expander.Option, nodeGroupIDOptionMap map[string]expander.Option, grpcOptionsSlice *[]*protos.Option) { | ||
| for _, option := range expansionOptions { | ||
| nodeGroupIDOptionMap[option.NodeGroup.Id()] = option | ||
| *grpcOptionsSlice = append(*grpcOptionsSlice, newOptionMessage(option.NodeGroup.Id(), int32(option.NodeCount), option.Debug, option.Pods)) | ||
| } | ||
| } | ||
|
|
||
| // populateNodeInfoForGRPC modifies the nodeInfo object, and replaces it with the v1.Node to pass through grpc | ||
| func populateNodeInfoForGRPC(nodeInfos map[string]*schedulerframework.NodeInfo, grpcNodeInfoMap map[string]*v1.Node) { | ||
| for nodeId, nodeInfo := range nodeInfos { | ||
| grpcNodeInfoMap[nodeId] = nodeInfo.Node() | ||
| } | ||
| } | ||
|
|
||
| func transformAndSanitizeOptionsFromGRPC(bestOptionsResponseOptions []*protos.Option, nodeGroupIDOptionMap map[string]expander.Option) []expander.Option { | ||
| var options []expander.Option | ||
| for _, option := range bestOptionsResponseOptions { | ||
| if option == nil { | ||
| klog.Errorf("gRPC server returned nil Option") | ||
| return nil | ||
| } | ||
| if _, ok := nodeGroupIDOptionMap[option.NodeGroupId]; ok { | ||
| options = append(options, nodeGroupIDOptionMap[option.NodeGroupId]) | ||
| } else { | ||
| klog.Errorf("gRPC server returned invalid nodeGroup ID: ", option.NodeGroupId) | ||
| return nil | ||
| } | ||
| } | ||
| return options | ||
| } | ||
|
|
||
| func newOptionMessage(nodeGroupId string, nodeCount int32, debug string, pods []*v1.Pod) *protos.Option { | ||
| return &protos.Option{NodeGroupId: nodeGroupId, NodeCount: nodeCount, Debug: debug, Pod: pods} | ||
| } |
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