mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
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104 lines
2.8 KiB
Go
104 lines
2.8 KiB
Go
package clusternative
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import (
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"errors"
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"net"
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"strings"
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"sync"
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"time"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/ingestserver"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/logger"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/netutil"
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"github.com/VictoriaMetrics/metrics"
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)
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var (
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writeRequestsTCP = metrics.NewCounter(`vm_ingestserver_requests_total{type="clusternative", net="tcp"}`)
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writeErrorsTCP = metrics.NewCounter(`vm_ingestserver_request_errors_total{type="clusternative", net="tcp"}`)
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)
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// Server accepts data from vminsert over TCP in the same way as vmstorage does.
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type Server struct {
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addr string
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lnTCP net.Listener
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wg sync.WaitGroup
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cm ingestserver.ConnsMap
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}
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// MustStart starts clusternative server on the given addr.
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//
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// The incoming connections are processed with insertHandler.
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//
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// MustStop must be called on the returned server when it is no longer needed.
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func MustStart(addr string, insertHandler func(c net.Conn) error) *Server {
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logger.Infof("starting TCP clusternative server at %q", addr)
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lnTCP, err := netutil.NewTCPListener("clusternative", addr, nil)
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if err != nil {
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logger.Fatalf("cannot start TCP clusternative server at %q: %s", addr, err)
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}
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s := &Server{
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addr: addr,
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lnTCP: lnTCP,
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}
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s.cm.Init()
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s.wg.Add(1)
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go func() {
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defer s.wg.Done()
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s.serveTCP(insertHandler)
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logger.Infof("stopped TCP clusternative server at %q", addr)
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}()
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return s
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}
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// MustStop stops the server.
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func (s *Server) MustStop() {
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logger.Infof("stopping TCP clusternative server at %q...", s.addr)
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if err := s.lnTCP.Close(); err != nil {
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logger.Errorf("cannot close TCP clusternative server: %s", err)
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}
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s.cm.CloseAll()
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s.wg.Wait()
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logger.Infof("TCP clusternative server at %q has been stopped", s.addr)
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}
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func (s *Server) serveTCP(insertHandler func(c net.Conn) error) {
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var wg sync.WaitGroup
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for {
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c, err := s.lnTCP.Accept()
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if err != nil {
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var ne net.Error
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if errors.As(err, &ne) {
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if ne.Temporary() {
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logger.Errorf("clusternative: temporary error when listening for TCP addr %q: %s", s.lnTCP.Addr(), err)
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time.Sleep(time.Second)
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continue
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}
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if strings.Contains(err.Error(), "use of closed network connection") {
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break
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}
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logger.Fatalf("unrecoverable error when accepting TCP clusternative connections: %s", err)
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}
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logger.Fatalf("unexpected error when accepting TCP clusternative connections: %s", err)
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}
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if !s.cm.Add(c) {
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// The server is already closed.
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_ = c.Close()
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break
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}
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wg.Add(1)
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go func() {
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defer func() {
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s.cm.Delete(c)
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_ = c.Close()
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wg.Done()
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}()
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writeRequestsTCP.Inc()
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if err := insertHandler(c); err != nil {
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writeErrorsTCP.Inc()
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logger.Errorf("error in TCP clusternative conn %q<->%q: %s", c.LocalAddr(), c.RemoteAddr(), err)
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}
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}()
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}
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wg.Wait()
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}
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