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client.go
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client.go
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/*
* Copyright 2020 The Dragonfly 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.
*/
//go:generate mockgen -destination mocks/client_mock.go -source client.go -package mocks
package client
import (
"context"
"time"
grpc_middleware "github.com/grpc-ecosystem/go-grpc-middleware"
grpc_zap "github.com/grpc-ecosystem/go-grpc-middleware/logging/zap"
grpc_retry "github.com/grpc-ecosystem/go-grpc-middleware/retry"
grpc_prometheus "github.com/grpc-ecosystem/go-grpc-prometheus"
"go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc"
"google.golang.org/grpc"
"google.golang.org/grpc/balancer"
cdnsystemv1 "d7y.io/api/pkg/apis/cdnsystem/v1"
commonv1 "d7y.io/api/pkg/apis/common/v1"
logger "d7y.io/dragonfly/v2/internal/dflog"
pkgbalancer "d7y.io/dragonfly/v2/pkg/balancer"
"d7y.io/dragonfly/v2/pkg/dfnet"
"d7y.io/dragonfly/v2/pkg/resolver"
"d7y.io/dragonfly/v2/pkg/rpc"
"d7y.io/dragonfly/v2/scheduler/config"
)
const (
// contextTimeout is timeout of grpc invoke.
contextTimeout = 2 * time.Minute
// maxRetries is maximum number of retries.
maxRetries = 3
// backoffWaitBetween is waiting for a fixed period of
// time between calls in backoff linear.
backoffWaitBetween = 500 * time.Millisecond
)
func GetClientByAddr(ctx context.Context, netAddr dfnet.NetAddr, opts ...grpc.DialOption) (Client, error) {
conn, err := grpc.DialContext(
ctx,
netAddr.Addr,
append([]grpc.DialOption{
grpc.WithUnaryInterceptor(grpc_middleware.ChainUnaryClient(
rpc.ConvertErrorUnaryClientInterceptor,
otelgrpc.UnaryClientInterceptor(),
grpc_prometheus.UnaryClientInterceptor,
grpc_zap.UnaryClientInterceptor(logger.GrpcLogger.Desugar()),
grpc_retry.UnaryClientInterceptor(
grpc_retry.WithMax(maxRetries),
grpc_retry.WithBackoff(grpc_retry.BackoffLinear(backoffWaitBetween)),
),
)),
grpc.WithStreamInterceptor(grpc_middleware.ChainStreamClient(
rpc.ConvertErrorStreamClientInterceptor,
otelgrpc.StreamClientInterceptor(),
grpc_prometheus.StreamClientInterceptor,
grpc_zap.StreamClientInterceptor(logger.GrpcLogger.Desugar()),
)),
}, opts...)...,
)
if err != nil {
return nil, err
}
return &client{
SeederClient: cdnsystemv1.NewSeederClient(conn),
ClientConn: conn,
}, nil
}
func GetClient(ctx context.Context, dynconfig config.DynconfigInterface, opts ...grpc.DialOption) (Client, error) {
// Register resolver and balancer.
resolver.RegisterSeedPeer(dynconfig)
builder, pickerBuilder := pkgbalancer.NewConsistentHashingBuilder()
balancer.Register(builder)
conn, err := grpc.DialContext(
ctx,
resolver.SeedPeerVirtualTarget,
append([]grpc.DialOption{
grpc.WithDefaultServiceConfig(pkgbalancer.BalancerServiceConfig),
grpc.WithUnaryInterceptor(grpc_middleware.ChainUnaryClient(
rpc.ConvertErrorUnaryClientInterceptor,
otelgrpc.UnaryClientInterceptor(),
grpc_prometheus.UnaryClientInterceptor,
grpc_zap.UnaryClientInterceptor(logger.GrpcLogger.Desugar()),
grpc_retry.UnaryClientInterceptor(
grpc_retry.WithMax(maxRetries),
grpc_retry.WithBackoff(grpc_retry.BackoffLinear(backoffWaitBetween)),
),
rpc.RefresherUnaryClientInterceptor(dynconfig),
)),
grpc.WithStreamInterceptor(grpc_middleware.ChainStreamClient(
rpc.ConvertErrorStreamClientInterceptor,
otelgrpc.StreamClientInterceptor(),
grpc_prometheus.StreamClientInterceptor,
grpc_zap.StreamClientInterceptor(logger.GrpcLogger.Desugar()),
rpc.RefresherStreamClientInterceptor(dynconfig),
)),
}, opts...)...,
)
if err != nil {
return nil, err
}
return &client{
SeederClient: cdnsystemv1.NewSeederClient(conn),
ClientConn: conn,
ConsistentHashingPickerBuilder: pickerBuilder,
}, nil
}
// Client is the interface for grpc client.
type Client interface {
// ObtainSeeds triggers the seed peer to download task back-to-source..
ObtainSeeds(context.Context, *cdnsystemv1.SeedRequest, ...grpc.CallOption) (cdnsystemv1.Seeder_ObtainSeedsClient, error)
// GetPieceTasks gets detail information of task.
GetPieceTasks(context.Context, *commonv1.PieceTaskRequest, ...grpc.CallOption) (*commonv1.PiecePacket, error)
// SyncPieceTasks syncs detail information of task.
SyncPieceTasks(context.Context, *commonv1.PieceTaskRequest, ...grpc.CallOption) (cdnsystemv1.Seeder_SyncPieceTasksClient, error)
// Close tears down the ClientConn and all underlying connections.
Close() error
}
// client provides seed peer grpc function.
type client struct {
cdnsystemv1.SeederClient
*grpc.ClientConn
*pkgbalancer.ConsistentHashingPickerBuilder
}
// ObtainSeeds triggers the seed peer to download task back-to-source..
func (c *client) ObtainSeeds(ctx context.Context, req *cdnsystemv1.SeedRequest, opts ...grpc.CallOption) (cdnsystemv1.Seeder_ObtainSeedsClient, error) {
return c.SeederClient.ObtainSeeds(
context.WithValue(ctx, pkgbalancer.ContextKey, req.TaskId),
req,
opts...,
)
}
// GetPieceTasks gets detail information of task.
func (c *client) GetPieceTasks(ctx context.Context, req *commonv1.PieceTaskRequest, opts ...grpc.CallOption) (*commonv1.PiecePacket, error) {
ctx, cancel := context.WithTimeout(ctx, contextTimeout)
defer cancel()
return c.SeederClient.GetPieceTasks(
context.WithValue(ctx, pkgbalancer.ContextKey, req.TaskId),
req,
opts...,
)
}
// SyncPieceTasks syncs detail information of task.
func (c *client) SyncPieceTasks(ctx context.Context, req *commonv1.PieceTaskRequest, opts ...grpc.CallOption) (cdnsystemv1.Seeder_SyncPieceTasksClient, error) {
stream, err := c.SeederClient.SyncPieceTasks(
context.WithValue(ctx, pkgbalancer.ContextKey, req.TaskId),
opts...,
)
if err != nil {
return nil, err
}
return stream, stream.Send(req)
}