/usr/share/gocode/src/github.com/influxdata/influxdb/services/graphite/service.go is in golang-github-influxdb-influxdb-dev 1.0.2+dfsg1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 | package graphite // import "github.com/influxdata/influxdb/services/graphite"
import (
"bufio"
"fmt"
"io"
"log"
"math"
"net"
"os"
"strings"
"sync"
"sync/atomic"
"time"
"github.com/influxdata/influxdb/models"
"github.com/influxdata/influxdb/monitor/diagnostics"
"github.com/influxdata/influxdb/services/meta"
"github.com/influxdata/influxdb/tsdb"
)
const udpBufferSize = 65536
// statistics gathered by the graphite package.
const (
statPointsReceived = "pointsRx"
statBytesReceived = "bytesRx"
statPointsParseFail = "pointsParseFail"
statPointsNaNFail = "pointsNaNFail"
statBatchesTransmitted = "batchesTx"
statPointsTransmitted = "pointsTx"
statBatchesTransmitFail = "batchesTxFail"
statConnectionsActive = "connsActive"
statConnectionsHandled = "connsHandled"
)
type tcpConnection struct {
conn net.Conn
connectTime time.Time
}
func (c *tcpConnection) Close() {
c.conn.Close()
}
// Service represents a Graphite service.
type Service struct {
mu sync.Mutex
bindAddress string
database string
retentionPolicy string
protocol string
batchSize int
batchPending int
batchTimeout time.Duration
udpReadBuffer int
batcher *tsdb.PointBatcher
parser *Parser
logger *log.Logger
stats *Statistics
statTags models.Tags
tcpConnectionsMu sync.Mutex
tcpConnections map[string]*tcpConnection
diagsKey string
ln net.Listener
addr net.Addr
udpConn *net.UDPConn
wg sync.WaitGroup
done chan struct{}
Monitor interface {
RegisterDiagnosticsClient(name string, client diagnostics.Client)
DeregisterDiagnosticsClient(name string)
}
PointsWriter interface {
WritePoints(database, retentionPolicy string, consistencyLevel models.ConsistencyLevel, points []models.Point) error
}
MetaClient interface {
CreateDatabase(name string) (*meta.DatabaseInfo, error)
CreateDatabaseWithRetentionPolicy(name string, spec *meta.RetentionPolicySpec) (*meta.DatabaseInfo, error)
CreateRetentionPolicy(database string, spec *meta.RetentionPolicySpec) (*meta.RetentionPolicyInfo, error)
Database(name string) *meta.DatabaseInfo
RetentionPolicy(database, name string) (*meta.RetentionPolicyInfo, error)
}
}
// NewService returns an instance of the Graphite service.
func NewService(c Config) (*Service, error) {
// Use defaults where necessary.
d := c.WithDefaults()
s := Service{
bindAddress: d.BindAddress,
database: d.Database,
retentionPolicy: d.RetentionPolicy,
protocol: d.Protocol,
batchSize: d.BatchSize,
batchPending: d.BatchPending,
udpReadBuffer: d.UDPReadBuffer,
batchTimeout: time.Duration(d.BatchTimeout),
logger: log.New(os.Stderr, fmt.Sprintf("[graphite] %s ", d.BindAddress), log.LstdFlags),
stats: &Statistics{},
statTags: map[string]string{"proto": d.Protocol, "bind": d.BindAddress},
tcpConnections: make(map[string]*tcpConnection),
done: make(chan struct{}),
diagsKey: strings.Join([]string{"graphite", d.Protocol, d.BindAddress}, ":"),
}
parser, err := NewParserWithOptions(Options{
Templates: d.Templates,
DefaultTags: d.DefaultTags(),
Separator: d.Separator})
if err != nil {
return nil, err
}
s.parser = parser
return &s, nil
}
// Open starts the Graphite input processing data.
func (s *Service) Open() error {
s.mu.Lock()
defer s.mu.Unlock()
s.logger.Printf("Starting graphite service, batch size %d, batch timeout %s", s.batchSize, s.batchTimeout)
// Register diagnostics if a Monitor service is available.
if s.Monitor != nil {
s.Monitor.RegisterDiagnosticsClient(s.diagsKey, s)
}
if db := s.MetaClient.Database(s.database); db != nil {
if rp, _ := s.MetaClient.RetentionPolicy(s.database, s.retentionPolicy); rp == nil {
spec := meta.RetentionPolicySpec{Name: s.retentionPolicy}
if _, err := s.MetaClient.CreateRetentionPolicy(s.database, &spec); err != nil {
s.logger.Printf("Failed to ensure target retention policy %s exists: %s", s.database, err.Error())
}
}
} else {
spec := meta.RetentionPolicySpec{Name: s.retentionPolicy}
if _, err := s.MetaClient.CreateDatabaseWithRetentionPolicy(s.database, &spec); err != nil {
s.logger.Printf("Failed to ensure target database %s exists: %s", s.database, err.Error())
return err
}
}
s.batcher = tsdb.NewPointBatcher(s.batchSize, s.batchPending, s.batchTimeout)
s.batcher.Start()
// Start processing batches.
s.wg.Add(1)
go s.processBatches(s.batcher)
var err error
if strings.ToLower(s.protocol) == "tcp" {
s.addr, err = s.openTCPServer()
} else if strings.ToLower(s.protocol) == "udp" {
s.addr, err = s.openUDPServer()
} else {
return fmt.Errorf("unrecognized Graphite input protocol %s", s.protocol)
}
if err != nil {
return err
}
s.logger.Printf("Listening on %s: %s", strings.ToUpper(s.protocol), s.addr.String())
return nil
}
func (s *Service) closeAllConnections() {
s.tcpConnectionsMu.Lock()
defer s.tcpConnectionsMu.Unlock()
for _, c := range s.tcpConnections {
c.Close()
}
}
// Close stops all data processing on the Graphite input.
func (s *Service) Close() error {
s.mu.Lock()
defer s.mu.Unlock()
s.closeAllConnections()
if s.ln != nil {
s.ln.Close()
}
if s.udpConn != nil {
s.udpConn.Close()
}
if s.batcher != nil {
s.batcher.Stop()
}
if s.Monitor != nil {
s.Monitor.DeregisterDiagnosticsClient(s.diagsKey)
}
close(s.done)
s.wg.Wait()
s.done = nil
return nil
}
// SetLogOutput sets the writer to which all logs are written. It must not be
// called after Open is called.
func (s *Service) SetLogOutput(w io.Writer) {
s.logger = log.New(w, "[graphite] ", log.LstdFlags)
}
// Statistics maintains statistics for the graphite service.
type Statistics struct {
PointsReceived int64
BytesReceived int64
PointsParseFail int64
PointsNaNFail int64
BatchesTransmitted int64
PointsTransmitted int64
BatchesTransmitFail int64
ActiveConnections int64
HandledConnections int64
}
// Statistics returns statistics for periodic monitoring.
func (s *Service) Statistics(tags map[string]string) []models.Statistic {
return []models.Statistic{{
Name: "graphite",
Tags: s.statTags.Merge(tags),
Values: map[string]interface{}{
statPointsReceived: atomic.LoadInt64(&s.stats.PointsReceived),
statBytesReceived: atomic.LoadInt64(&s.stats.BytesReceived),
statPointsParseFail: atomic.LoadInt64(&s.stats.PointsParseFail),
statPointsNaNFail: atomic.LoadInt64(&s.stats.PointsNaNFail),
statBatchesTransmitted: atomic.LoadInt64(&s.stats.BatchesTransmitted),
statPointsTransmitted: atomic.LoadInt64(&s.stats.PointsTransmitted),
statBatchesTransmitFail: atomic.LoadInt64(&s.stats.BatchesTransmitFail),
statConnectionsActive: atomic.LoadInt64(&s.stats.ActiveConnections),
statConnectionsHandled: atomic.LoadInt64(&s.stats.HandledConnections),
},
}}
}
// Addr returns the address the Service binds to.
func (s *Service) Addr() net.Addr {
return s.addr
}
// openTCPServer opens the Graphite input in TCP mode and starts processing data.
func (s *Service) openTCPServer() (net.Addr, error) {
ln, err := net.Listen("tcp", s.bindAddress)
if err != nil {
return nil, err
}
s.ln = ln
s.wg.Add(1)
go func() {
defer s.wg.Done()
for {
conn, err := s.ln.Accept()
if opErr, ok := err.(*net.OpError); ok && !opErr.Temporary() {
s.logger.Println("graphite TCP listener closed")
return
}
if err != nil {
s.logger.Println("error accepting TCP connection", err.Error())
continue
}
s.wg.Add(1)
go s.handleTCPConnection(conn)
}
}()
return ln.Addr(), nil
}
// handleTCPConnection services an individual TCP connection for the Graphite input.
func (s *Service) handleTCPConnection(conn net.Conn) {
defer s.wg.Done()
defer conn.Close()
defer atomic.AddInt64(&s.stats.ActiveConnections, -1)
defer s.untrackConnection(conn)
atomic.AddInt64(&s.stats.ActiveConnections, 1)
atomic.AddInt64(&s.stats.HandledConnections, 1)
s.trackConnection(conn)
reader := bufio.NewReader(conn)
for {
// Read up to the next newline.
buf, err := reader.ReadBytes('\n')
if err != nil {
return
}
// Trim the buffer, even though there should be no padding
line := strings.TrimSpace(string(buf))
atomic.AddInt64(&s.stats.PointsReceived, 1)
atomic.AddInt64(&s.stats.BytesReceived, int64(len(buf)))
s.handleLine(line)
}
}
func (s *Service) trackConnection(c net.Conn) {
s.tcpConnectionsMu.Lock()
defer s.tcpConnectionsMu.Unlock()
s.tcpConnections[c.RemoteAddr().String()] = &tcpConnection{
conn: c,
connectTime: time.Now().UTC(),
}
}
func (s *Service) untrackConnection(c net.Conn) {
s.tcpConnectionsMu.Lock()
defer s.tcpConnectionsMu.Unlock()
delete(s.tcpConnections, c.RemoteAddr().String())
}
// openUDPServer opens the Graphite input in UDP mode and starts processing incoming data.
func (s *Service) openUDPServer() (net.Addr, error) {
addr, err := net.ResolveUDPAddr("udp", s.bindAddress)
if err != nil {
return nil, err
}
s.udpConn, err = net.ListenUDP("udp", addr)
if err != nil {
return nil, err
}
if s.udpReadBuffer != 0 {
err = s.udpConn.SetReadBuffer(s.udpReadBuffer)
if err != nil {
return nil, fmt.Errorf("unable to set UDP read buffer to %d: %s",
s.udpReadBuffer, err)
}
}
buf := make([]byte, udpBufferSize)
s.wg.Add(1)
go func() {
defer s.wg.Done()
for {
n, _, err := s.udpConn.ReadFromUDP(buf)
if err != nil {
s.udpConn.Close()
return
}
lines := strings.Split(string(buf[:n]), "\n")
for _, line := range lines {
s.handleLine(line)
}
atomic.AddInt64(&s.stats.PointsReceived, int64(len(lines)))
atomic.AddInt64(&s.stats.BytesReceived, int64(n))
}
}()
return s.udpConn.LocalAddr(), nil
}
func (s *Service) handleLine(line string) {
if line == "" {
return
}
// Parse it.
point, err := s.parser.Parse(line)
if err != nil {
switch err := err.(type) {
case *UnsupportedValueError:
// Graphite ignores NaN values with no error.
if math.IsNaN(err.Value) {
atomic.AddInt64(&s.stats.PointsNaNFail, 1)
return
}
}
s.logger.Printf("unable to parse line: %s: %s", line, err)
atomic.AddInt64(&s.stats.PointsParseFail, 1)
return
}
s.batcher.In() <- point
}
// processBatches continually drains the given batcher and writes the batches to the database.
func (s *Service) processBatches(batcher *tsdb.PointBatcher) {
defer s.wg.Done()
for {
select {
case batch := <-batcher.Out():
if err := s.PointsWriter.WritePoints(s.database, s.retentionPolicy, models.ConsistencyLevelAny, batch); err == nil {
atomic.AddInt64(&s.stats.BatchesTransmitted, 1)
atomic.AddInt64(&s.stats.PointsTransmitted, int64(len(batch)))
} else {
s.logger.Printf("failed to write point batch to database %q: %s", s.database, err)
atomic.AddInt64(&s.stats.BatchesTransmitFail, 1)
}
case <-s.done:
return
}
}
}
// Diagnostics returns diagnostics of the graphite service.
func (s *Service) Diagnostics() (*diagnostics.Diagnostics, error) {
s.tcpConnectionsMu.Lock()
defer s.tcpConnectionsMu.Unlock()
d := &diagnostics.Diagnostics{
Columns: []string{"local", "remote", "connect time"},
Rows: make([][]interface{}, 0, len(s.tcpConnections)),
}
for _, v := range s.tcpConnections {
d.Rows = append(d.Rows, []interface{}{v.conn.LocalAddr().String(), v.conn.RemoteAddr().String(), v.connectTime})
}
return d, nil
}
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