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https://github.com/prometheus/node_exporter.git
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b25273fac0
On Linux, we get more detailed interface statistics from netlink than we did from `/proc/net/dev`. This commit adds a new flag (`--collector.netdev.enable-detailed-metrics`) to expose those statistics under new (incompatible) metric names. When enabled, the metric names are also changed on Darwin and BSD platforms to keep everything consistent, but it doesn't provide more detailed statistics on those platforms. The old metrics can be derived from the new ones using the following rules ([dev_seq_printf_stats]): - `receive_errs` = `receive_errors` - `receive_drop` = `receive_dropped` + `receive_missed_errors` - `receive_fifo` = `receive_fifo_errors` - `receive_frame` = `receive_length_errors` + `receive_over_errors` + `receive_crc_errors` + `receive_frame_errors` - `receive_multicast` = `multicast` - `transmit_errs` = `transmit_errors` - `transmit_drop` = `transmit_dropped` - `transmit_fifo` = `transmit_fifo_errors` - `transmit_colls` = `collisions` - `transmit_carrier` = `transmit_aborted_errors` + `transmit_carrier_errors` + `transmit_heartbeat_errors` + `transmit_window_errors` [dev_seq_printf_stats]: https://github.com/torvalds/linux/blob/master/net/core/net-procfs.c#L75-L97 Signed-off-by: Benoît Knecht <bknecht@protonmail.ch>
121 lines
3 KiB
Go
121 lines
3 KiB
Go
// Copyright 2015 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//go:build !nonetdev
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// +build !nonetdev
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package collector
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import (
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"bytes"
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"encoding/binary"
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"fmt"
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"net"
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"github.com/go-kit/log"
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"github.com/go-kit/log/level"
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"golang.org/x/sys/unix"
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)
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func getNetDevStats(filter *deviceFilter, logger log.Logger) (netDevStats, error) {
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netDev := netDevStats{}
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ifs, err := net.Interfaces()
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if err != nil {
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return nil, fmt.Errorf("net.Interfaces() failed: %w", err)
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}
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for _, iface := range ifs {
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if filter.ignored(iface.Name) {
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level.Debug(logger).Log("msg", "Ignoring device", "device", iface.Name)
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continue
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}
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ifaceData, err := getIfaceData(iface.Index)
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if err != nil {
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level.Debug(logger).Log("msg", "failed to load data for interface", "device", iface.Name, "err", err)
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continue
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}
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netDev[iface.Name] = map[string]uint64{
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"receive_packets": ifaceData.Data.Ipackets,
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"transmit_packets": ifaceData.Data.Opackets,
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"receive_bytes": ifaceData.Data.Ibytes,
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"transmit_bytes": ifaceData.Data.Obytes,
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"receive_errors": ifaceData.Data.Ierrors,
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"transmit_errors": ifaceData.Data.Oerrors,
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"receive_dropped": ifaceData.Data.Iqdrops,
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"receive_multicast": ifaceData.Data.Imcasts,
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"transmit_multicast": ifaceData.Data.Omcasts,
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"collisions": ifaceData.Data.Collisions,
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"noproto": ifaceData.Data.Noproto,
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}
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}
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return netDev, nil
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}
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func getIfaceData(index int) (*ifMsghdr2, error) {
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var data ifMsghdr2
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rawData, err := unix.SysctlRaw("net", unix.AF_ROUTE, 0, 0, unix.NET_RT_IFLIST2, index)
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if err != nil {
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return nil, err
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}
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err = binary.Read(bytes.NewReader(rawData), binary.LittleEndian, &data)
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return &data, err
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}
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type ifMsghdr2 struct {
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Msglen uint16
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Version uint8
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Type uint8
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Addrs int32
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Flags int32
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Index uint16
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_ [2]byte
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SndLen int32
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SndMaxlen int32
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SndDrops int32
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Timer int32
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Data ifData64
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}
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// https://github.com/apple/darwin-xnu/blob/main/bsd/net/if_var.h#L199-L231
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type ifData64 struct {
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Type uint8
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Typelen uint8
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Physical uint8
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Addrlen uint8
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Hdrlen uint8
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Recvquota uint8
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Xmitquota uint8
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Unused1 uint8
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Mtu uint32
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Metric uint32
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Baudrate uint64
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Ipackets uint64
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Ierrors uint64
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Opackets uint64
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Oerrors uint64
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Collisions uint64
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Ibytes uint64
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Obytes uint64
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Imcasts uint64
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Omcasts uint64
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Iqdrops uint64
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Noproto uint64
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Recvtiming uint32
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Xmittiming uint32
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Lastchange unix.Timeval32
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}
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