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statconn.go
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statconn.go
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package promscrape
import (
"net"
"sync/atomic"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/netutil"
"github.com/VictoriaMetrics/fasthttp"
"github.com/VictoriaMetrics/metrics"
)
func statDial(addr string) (conn net.Conn, err error) {
if netutil.TCP6Enabled() {
conn, err = fasthttp.DialDualStack(addr)
} else {
conn, err = fasthttp.Dial(addr)
}
dialsTotal.Inc()
if err != nil {
dialErrors.Inc()
return nil, err
}
conns.Inc()
sc := &statConn{
Conn: conn,
}
return sc, nil
}
var (
dialsTotal = metrics.NewCounter(`vm_promscrape_dials_total`)
dialErrors = metrics.NewCounter(`vm_promscrape_dial_errors_total`)
conns = metrics.NewCounter(`vm_promscrape_conns`)
)
type statConn struct {
closed uint64
net.Conn
}
func (sc *statConn) Read(p []byte) (int, error) {
n, err := sc.Conn.Read(p)
connReadsTotal.Inc()
if err != nil {
connReadErrors.Inc()
}
connBytesRead.Add(n)
return n, err
}
func (sc *statConn) Write(p []byte) (int, error) {
n, err := sc.Conn.Write(p)
connWritesTotal.Inc()
if err != nil {
connWriteErrors.Inc()
}
connBytesWritten.Add(n)
return n, err
}
func (sc *statConn) Close() error {
err := sc.Conn.Close()
if atomic.AddUint64(&sc.closed, 1) == 1 {
conns.Dec()
}
return err
}
var (
connReadsTotal = metrics.NewCounter(`vm_promscrape_conn_reads_total`)
connWritesTotal = metrics.NewCounter(`vm_promscrape_conn_writes_total`)
connReadErrors = metrics.NewCounter(`vm_promscrape_conn_read_errors_total`)
connWriteErrors = metrics.NewCounter(`vm_promscrape_conn_write_errors_total`)
connBytesRead = metrics.NewCounter(`vm_promscrape_conn_bytes_read_total`)
connBytesWritten = metrics.NewCounter(`vm_promscrape_conn_bytes_written_total`)
)