mirror of
https://github.com/prometheus/prometheus.git
synced 2024-11-18 19:44:06 -08:00
0393b188c9
* Trace remote read Signed-off-by: vas <vasily.sliouniaev@jet.com> * Use jaeger Signed-off-by: vas <vasily.sliouniaev@jet.com>
99 lines
3.1 KiB
Go
99 lines
3.1 KiB
Go
// Copyright (c) 2017 Uber Technologies, Inc.
|
|
//
|
|
// 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 utils
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
"io"
|
|
"net"
|
|
|
|
"github.com/uber/jaeger-client-go/thrift"
|
|
|
|
"github.com/uber/jaeger-client-go/thrift-gen/agent"
|
|
"github.com/uber/jaeger-client-go/thrift-gen/jaeger"
|
|
"github.com/uber/jaeger-client-go/thrift-gen/zipkincore"
|
|
)
|
|
|
|
// UDPPacketMaxLength is the max size of UDP packet we want to send, synced with jaeger-agent
|
|
const UDPPacketMaxLength = 65000
|
|
|
|
// AgentClientUDP is a UDP client to Jaeger agent that implements agent.Agent interface.
|
|
type AgentClientUDP struct {
|
|
agent.Agent
|
|
io.Closer
|
|
|
|
connUDP *net.UDPConn
|
|
client *agent.AgentClient
|
|
maxPacketSize int // max size of datagram in bytes
|
|
thriftBuffer *thrift.TMemoryBuffer // buffer used to calculate byte size of a span
|
|
}
|
|
|
|
// NewAgentClientUDP creates a client that sends spans to Jaeger Agent over UDP.
|
|
func NewAgentClientUDP(hostPort string, maxPacketSize int) (*AgentClientUDP, error) {
|
|
if maxPacketSize == 0 {
|
|
maxPacketSize = UDPPacketMaxLength
|
|
}
|
|
|
|
thriftBuffer := thrift.NewTMemoryBufferLen(maxPacketSize)
|
|
protocolFactory := thrift.NewTCompactProtocolFactory()
|
|
client := agent.NewAgentClientFactory(thriftBuffer, protocolFactory)
|
|
|
|
destAddr, err := net.ResolveUDPAddr("udp", hostPort)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
connUDP, err := net.DialUDP(destAddr.Network(), nil, destAddr)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if err := connUDP.SetWriteBuffer(maxPacketSize); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
clientUDP := &AgentClientUDP{
|
|
connUDP: connUDP,
|
|
client: client,
|
|
maxPacketSize: maxPacketSize,
|
|
thriftBuffer: thriftBuffer}
|
|
return clientUDP, nil
|
|
}
|
|
|
|
// EmitZipkinBatch implements EmitZipkinBatch() of Agent interface
|
|
func (a *AgentClientUDP) EmitZipkinBatch(spans []*zipkincore.Span) error {
|
|
return errors.New("Not implemented")
|
|
}
|
|
|
|
// EmitBatch implements EmitBatch() of Agent interface
|
|
func (a *AgentClientUDP) EmitBatch(batch *jaeger.Batch) error {
|
|
a.thriftBuffer.Reset()
|
|
a.client.SeqId = 0 // we have no need for distinct SeqIds for our one-way UDP messages
|
|
if err := a.client.EmitBatch(batch); err != nil {
|
|
return err
|
|
}
|
|
if a.thriftBuffer.Len() > a.maxPacketSize {
|
|
return fmt.Errorf("data does not fit within one UDP packet; size %d, max %d, spans %d",
|
|
a.thriftBuffer.Len(), a.maxPacketSize, len(batch.Spans))
|
|
}
|
|
_, err := a.connUDP.Write(a.thriftBuffer.Bytes())
|
|
return err
|
|
}
|
|
|
|
// Close implements Close() of io.Closer and closes the underlying UDP connection.
|
|
func (a *AgentClientUDP) Close() error {
|
|
return a.connUDP.Close()
|
|
}
|