76 lines
2.7 KiB
Go
76 lines
2.7 KiB
Go
// Copyright (c) HashiCorp, Inc.
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// SPDX-License-Identifier: MPL-2.0
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package external
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import (
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"time"
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"github.com/armon/go-metrics"
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middleware "github.com/grpc-ecosystem/go-grpc-middleware"
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recovery "github.com/grpc-ecosystem/go-grpc-middleware/recovery"
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"google.golang.org/grpc"
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"google.golang.org/grpc/credentials"
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"google.golang.org/grpc/keepalive"
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"github.com/hashicorp/consul/agent/consul/rate"
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agentmiddleware "github.com/hashicorp/consul/agent/grpc-middleware"
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"github.com/hashicorp/consul/tlsutil"
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)
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var (
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metricsLabels = []metrics.Label{{
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Name: "server_type",
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Value: "external",
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}}
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)
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// NewServer constructs a gRPC server for the external gRPC port, to which
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// handlers can be registered.
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func NewServer(logger agentmiddleware.Logger, metricsObj *metrics.Metrics, tls *tlsutil.Configurator, limiter rate.RequestLimitsHandler) *grpc.Server {
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if metricsObj == nil {
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metricsObj = metrics.Default()
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}
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recoveryOpts := agentmiddleware.PanicHandlerMiddlewareOpts(logger)
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unaryInterceptors := []grpc.UnaryServerInterceptor{
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// Add middlware interceptors to recover in case of panics.
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recovery.UnaryServerInterceptor(recoveryOpts...),
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}
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streamInterceptors := []grpc.StreamServerInterceptor{
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// Add middlware interceptors to recover in case of panics.
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recovery.StreamServerInterceptor(recoveryOpts...),
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agentmiddleware.NewActiveStreamCounter(metricsObj, metricsLabels).Intercept,
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}
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if tls != nil {
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// Attach TLS middleware if TLS is provided.
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authInterceptor := agentmiddleware.AuthInterceptor{TLS: tls, Logger: logger}
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unaryInterceptors = append(unaryInterceptors, authInterceptor.InterceptUnary)
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streamInterceptors = append(streamInterceptors, authInterceptor.InterceptStream)
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}
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opts := []grpc.ServerOption{
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grpc.MaxConcurrentStreams(2048),
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grpc.MaxRecvMsgSize(50 * 1024 * 1024),
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grpc.InTapHandle(agentmiddleware.ServerRateLimiterMiddleware(limiter, agentmiddleware.NewPanicHandler(logger), logger)),
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grpc.StatsHandler(agentmiddleware.NewStatsHandler(metricsObj, metricsLabels)),
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middleware.WithUnaryServerChain(unaryInterceptors...),
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middleware.WithStreamServerChain(streamInterceptors...),
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grpc.KeepaliveEnforcementPolicy(keepalive.EnforcementPolicy{
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// This must be less than the keealive.ClientParameters Time setting, otherwise
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// the server will disconnect the client for sending too many keepalive pings.
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// Currently the client param is set to 30s.
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MinTime: 15 * time.Second,
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}),
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}
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if tls != nil {
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// Attach TLS credentials, if provided.
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tlsCreds := agentmiddleware.NewOptionalTransportCredentials(
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credentials.NewTLS(tls.IncomingGRPCConfig()),
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logger)
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opts = append(opts, grpc.Creds(tlsCreds))
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}
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return grpc.NewServer(opts...)
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}
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