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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>
79 lines
2.3 KiB
Go
79 lines
2.3 KiB
Go
// Copyright 2020 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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"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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"unsafe"
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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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mib := [6]_C_int{unix.CTL_NET, unix.AF_ROUTE, 0, 0, unix.NET_RT_IFLIST, 0}
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buf, err := sysctl(mib[:])
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if err != nil {
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return nil, err
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}
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n := uintptr(len(buf))
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index := uintptr(unsafe.Pointer(&buf[0]))
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next := uintptr(0)
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var rtm *unix.RtMsghdr
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for next = index; next < (index + n); next += uintptr(rtm.Msglen) {
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rtm = (*unix.RtMsghdr)(unsafe.Pointer(next))
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if rtm.Version != unix.RTM_VERSION || rtm.Type != unix.RTM_IFINFO {
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continue
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}
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ifm := (*unix.IfMsghdr)(unsafe.Pointer(next))
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if ifm.Addrs&unix.RTA_IFP == 0 {
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continue
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}
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dl := (*unix.RawSockaddrDatalink)(unsafe.Pointer(next + uintptr(rtm.Hdrlen)))
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if dl.Family != unix.AF_LINK {
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continue
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}
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data := ifm.Data
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dev := int8ToString(dl.Data[:dl.Nlen])
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if filter.ignored(dev) {
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level.Debug(logger).Log("msg", "Ignoring device", "device", dev)
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continue
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}
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// https://cs.opensource.google/go/x/sys/+/master:unix/ztypes_openbsd_amd64.go;l=292-316
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netDev[dev] = map[string]uint64{
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"receive_packets": data.Ipackets,
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"transmit_packets": data.Opackets,
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"receive_bytes": data.Ibytes,
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"transmit_bytes": data.Obytes,
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"receive_errors": data.Ierrors,
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"transmit_errors": data.Oerrors,
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"receive_dropped": data.Iqdrops,
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"transmit_dropped": data.Oqdrops,
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"receive_multicast": data.Imcasts,
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"transmit_multicast": data.Omcasts,
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"collisions": data.Collisions,
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"noproto": 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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