mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-11-23 06:40:23 +00:00
146 lines
4.0 KiB
Go
146 lines
4.0 KiB
Go
/*
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Copyright 2017 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package csicommon
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import (
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"net"
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"os"
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"strconv"
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"strings"
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"sync"
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"github.com/container-storage-interface/spec/lib/go/csi"
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grpc_middleware "github.com/grpc-ecosystem/go-grpc-middleware"
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grpc_prometheus "github.com/grpc-ecosystem/go-grpc-prometheus"
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"github.com/prometheus/client_golang/prometheus"
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"google.golang.org/grpc"
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"k8s.io/klog"
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)
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// NonBlockingGRPCServer defines Non blocking GRPC server interfaces
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type NonBlockingGRPCServer interface {
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// Start services at the endpoint
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Start(endpoint, hstOptions string, ids csi.IdentityServer, cs csi.ControllerServer, ns csi.NodeServer, metrics bool)
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// Waits for the service to stop
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Wait()
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// Stops the service gracefully
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Stop()
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// Stops the service forcefully
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ForceStop()
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}
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// NewNonBlockingGRPCServer return non-blocking GRPC
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func NewNonBlockingGRPCServer() NonBlockingGRPCServer {
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return &nonBlockingGRPCServer{}
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}
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// NonBlocking server
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type nonBlockingGRPCServer struct {
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wg sync.WaitGroup
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server *grpc.Server
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}
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// Start start service on endpoint
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func (s *nonBlockingGRPCServer) Start(endpoint, hstOptions string, ids csi.IdentityServer, cs csi.ControllerServer, ns csi.NodeServer, metrics bool) {
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s.wg.Add(1)
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go s.serve(endpoint, hstOptions, ids, cs, ns, metrics)
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}
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// Wait blocks until the WaitGroup counter
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func (s *nonBlockingGRPCServer) Wait() {
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s.wg.Wait()
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}
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// GracefulStop stops the gRPC server gracefully.
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func (s *nonBlockingGRPCServer) Stop() {
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s.server.GracefulStop()
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}
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// Stop stops the gRPC server.
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func (s *nonBlockingGRPCServer) ForceStop() {
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s.server.Stop()
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}
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func (s *nonBlockingGRPCServer) serve(endpoint, hstOptions string, ids csi.IdentityServer, cs csi.ControllerServer, ns csi.NodeServer, metrics bool) {
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proto, addr, err := parseEndpoint(endpoint)
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if err != nil {
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klog.Fatal(err.Error())
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}
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if proto == "unix" {
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addr = "/" + addr
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if e := os.Remove(addr); e != nil && !os.IsNotExist(e) {
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klog.Fatalf("Failed to remove %s, error: %s", addr, e.Error())
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}
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}
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listener, err := net.Listen(proto, addr)
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if err != nil {
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klog.Fatalf("Failed to listen: %v", err)
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}
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middleWare := []grpc.UnaryServerInterceptor{contextIDInjector, logGRPC, panicHandler}
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if metrics {
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middleWare = append(middleWare, grpc_prometheus.UnaryServerInterceptor)
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}
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opts := []grpc.ServerOption{
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grpc_middleware.WithUnaryServerChain(middleWare...),
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}
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server := grpc.NewServer(opts...)
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s.server = server
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if ids != nil {
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csi.RegisterIdentityServer(server, ids)
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}
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if cs != nil {
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csi.RegisterControllerServer(server, cs)
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}
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if ns != nil {
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csi.RegisterNodeServer(server, ns)
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}
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klog.Infof("Listening for connections on address: %#v", listener.Addr())
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if metrics {
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ho := strings.Split(hstOptions, ",")
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if len(ho) != 3 {
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klog.Fatalf("invalid histogram options provided: %v", hstOptions)
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}
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start, e := strconv.ParseFloat(ho[0], 32)
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if e != nil {
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klog.Fatalf("failed to parse histogram start value: %v", e)
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}
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factor, e := strconv.ParseFloat(ho[1], 32)
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if err != nil {
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klog.Fatalf("failed to parse histogram factor value: %v", e)
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}
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count, e := strconv.Atoi(ho[2])
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if err != nil {
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klog.Fatalf("failed to parse histogram count value: %v", e)
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}
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buckets := prometheus.ExponentialBuckets(start, factor, count)
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bktOptios := grpc_prometheus.WithHistogramBuckets(buckets)
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grpc_prometheus.EnableHandlingTimeHistogram(bktOptios)
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grpc_prometheus.Register(server)
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}
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err = server.Serve(listener)
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if err != nil {
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klog.Fatalf("Failed to server: %v", err)
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}
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}
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