mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2024-11-27 02:46:47 +01:00
123 lines
2.7 KiB
Go
123 lines
2.7 KiB
Go
package promscrape
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import (
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"context"
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"crypto/tls"
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"fmt"
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"net"
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"sync"
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"sync/atomic"
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"time"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/netutil"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/proxy"
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"github.com/VictoriaMetrics/fasthttp"
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"github.com/VictoriaMetrics/metrics"
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)
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func statStdDial(ctx context.Context, network, addr string) (net.Conn, error) {
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d := getStdDialer()
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conn, err := d.DialContext(ctx, network, addr)
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dialsTotal.Inc()
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if err != nil {
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dialErrors.Inc()
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if !netutil.TCP6Enabled() {
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err = fmt.Errorf("%w; try -enableTCP6 command-line flag if you scrape ipv6 addresses", err)
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}
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return nil, err
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}
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conns.Inc()
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sc := &statConn{
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Conn: conn,
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}
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return sc, nil
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}
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func getStdDialer() *net.Dialer {
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stdDialerOnce.Do(func() {
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stdDialer = &net.Dialer{
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Timeout: 30 * time.Second,
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KeepAlive: 30 * time.Second,
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DualStack: netutil.TCP6Enabled(),
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}
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})
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return stdDialer
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}
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var (
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stdDialer *net.Dialer
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stdDialerOnce sync.Once
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)
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func newStatDialFunc(proxyURL proxy.URL, tlsConfig *tls.Config) (fasthttp.DialFunc, error) {
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dialFunc, err := proxyURL.NewDialFunc(tlsConfig)
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if err != nil {
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return nil, err
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}
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statDialFunc := func(addr string) (net.Conn, error) {
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conn, err := dialFunc(addr)
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dialsTotal.Inc()
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if err != nil {
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dialErrors.Inc()
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if !netutil.TCP6Enabled() {
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err = fmt.Errorf("%w; try -enableTCP6 command-line flag if you scrape ipv6 addresses", err)
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}
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return nil, err
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}
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conns.Inc()
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sc := &statConn{
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Conn: conn,
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}
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return sc, nil
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}
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return statDialFunc, nil
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}
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var (
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dialsTotal = metrics.NewCounter(`vm_promscrape_dials_total`)
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dialErrors = metrics.NewCounter(`vm_promscrape_dial_errors_total`)
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conns = metrics.NewCounter(`vm_promscrape_conns`)
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)
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type statConn struct {
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closed uint64
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net.Conn
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}
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func (sc *statConn) Read(p []byte) (int, error) {
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n, err := sc.Conn.Read(p)
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connReadsTotal.Inc()
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if err != nil {
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connReadErrors.Inc()
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}
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connBytesRead.Add(n)
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return n, err
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}
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func (sc *statConn) Write(p []byte) (int, error) {
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n, err := sc.Conn.Write(p)
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connWritesTotal.Inc()
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if err != nil {
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connWriteErrors.Inc()
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}
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connBytesWritten.Add(n)
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return n, err
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}
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func (sc *statConn) Close() error {
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err := sc.Conn.Close()
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if atomic.AddUint64(&sc.closed, 1) == 1 {
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conns.Dec()
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}
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return err
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}
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var (
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connReadsTotal = metrics.NewCounter(`vm_promscrape_conn_reads_total`)
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connWritesTotal = metrics.NewCounter(`vm_promscrape_conn_writes_total`)
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connReadErrors = metrics.NewCounter(`vm_promscrape_conn_read_errors_total`)
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connWriteErrors = metrics.NewCounter(`vm_promscrape_conn_write_errors_total`)
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connBytesRead = metrics.NewCounter(`vm_promscrape_conn_bytes_read_total`)
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connBytesWritten = metrics.NewCounter(`vm_promscrape_conn_bytes_written_total`)
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)
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