node_exporter/collector/netdev_linux.go

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// Copyright 2015 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//go:build !nonetdev
// +build !nonetdev
package collector
import (
"fmt"
"github.com/alecthomas/kingpin/v2"
"github.com/go-kit/log"
"github.com/go-kit/log/level"
"github.com/jsimonetti/rtnetlink"
"github.com/prometheus/procfs"
)
var (
netDevNetlink = kingpin.Flag("collector.netdev.netlink", "Use netlink to gather stats instead of /proc/net/dev.").Default("true").Bool()
)
func getNetDevStats(filter *deviceFilter, logger log.Logger) (netDevStats, error) {
if *netDevNetlink {
return netlinkStats(filter, logger)
}
return procNetDevStats(filter, logger)
}
func netlinkStats(filter *deviceFilter, logger log.Logger) (netDevStats, error) {
conn, err := rtnetlink.Dial(nil)
if err != nil {
return nil, err
}
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defer conn.Close()
links, err := conn.Link.List()
if err != nil {
return nil, err
}
return parseNetlinkStats(links, filter, logger), nil
}
func parseNetlinkStats(links []rtnetlink.LinkMessage, filter *deviceFilter, logger log.Logger) netDevStats {
metrics := netDevStats{}
for _, msg := range links {
if msg.Attributes == nil {
level.Debug(logger).Log("msg", "No netlink attributes, skipping")
continue
}
name := msg.Attributes.Name
stats := msg.Attributes.Stats64
if stats32 := msg.Attributes.Stats; stats == nil && stats32 != nil {
stats = &rtnetlink.LinkStats64{
RXPackets: uint64(stats32.RXPackets),
TXPackets: uint64(stats32.TXPackets),
RXBytes: uint64(stats32.RXBytes),
TXBytes: uint64(stats32.TXBytes),
RXErrors: uint64(stats32.RXErrors),
TXErrors: uint64(stats32.TXErrors),
RXDropped: uint64(stats32.RXDropped),
TXDropped: uint64(stats32.TXDropped),
Multicast: uint64(stats32.Multicast),
Collisions: uint64(stats32.Collisions),
RXLengthErrors: uint64(stats32.RXLengthErrors),
RXOverErrors: uint64(stats32.RXOverErrors),
RXCRCErrors: uint64(stats32.RXCRCErrors),
RXFrameErrors: uint64(stats32.RXFrameErrors),
RXFIFOErrors: uint64(stats32.RXFIFOErrors),
RXMissedErrors: uint64(stats32.RXMissedErrors),
TXAbortedErrors: uint64(stats32.TXAbortedErrors),
TXCarrierErrors: uint64(stats32.TXCarrierErrors),
TXFIFOErrors: uint64(stats32.TXFIFOErrors),
TXHeartbeatErrors: uint64(stats32.TXHeartbeatErrors),
TXWindowErrors: uint64(stats32.TXWindowErrors),
RXCompressed: uint64(stats32.RXCompressed),
TXCompressed: uint64(stats32.TXCompressed),
RXNoHandler: uint64(stats32.RXNoHandler),
RXOtherhostDropped: 0,
}
}
if filter.ignored(name) {
level.Debug(logger).Log("msg", "Ignoring device", "device", name)
continue
}
// Make sure we don't panic when accessing `stats` attributes below.
if stats == nil {
level.Debug(logger).Log("msg", "No netlink stats, skipping")
continue
}
// https://github.com/torvalds/linux/blob/master/include/uapi/linux/if_link.h#L42-L246
metrics[name] = map[string]uint64{
"receive_packets": stats.RXPackets,
"transmit_packets": stats.TXPackets,
"receive_bytes": stats.RXBytes,
"transmit_bytes": stats.TXBytes,
"receive_errors": stats.RXErrors,
"transmit_errors": stats.TXErrors,
"receive_dropped": stats.RXDropped,
"transmit_dropped": stats.TXDropped,
"multicast": stats.Multicast,
"collisions": stats.Collisions,
// detailed rx_errors
"receive_length_errors": stats.RXLengthErrors,
"receive_over_errors": stats.RXOverErrors,
"receive_crc_errors": stats.RXCRCErrors,
"receive_frame_errors": stats.RXFrameErrors,
"receive_fifo_errors": stats.RXFIFOErrors,
"receive_missed_errors": stats.RXMissedErrors,
// detailed tx_errors
"transmit_aborted_errors": stats.TXAbortedErrors,
"transmit_carrier_errors": stats.TXCarrierErrors,
"transmit_fifo_errors": stats.TXFIFOErrors,
"transmit_heartbeat_errors": stats.TXHeartbeatErrors,
"transmit_window_errors": stats.TXWindowErrors,
// for cslip etc
"receive_compressed": stats.RXCompressed,
"transmit_compressed": stats.TXCompressed,
"receive_nohandler": stats.RXNoHandler,
}
}
return metrics
}
func procNetDevStats(filter *deviceFilter, logger log.Logger) (netDevStats, error) {
metrics := netDevStats{}
fs, err := procfs.NewFS(*procPath)
if err != nil {
return metrics, fmt.Errorf("failed to open procfs: %w", err)
}
netDev, err := fs.NetDev()
if err != nil {
return metrics, fmt.Errorf("failed to parse /proc/net/dev: %w", err)
}
for _, stats := range netDev {
name := stats.Name
if filter.ignored(name) {
level.Debug(logger).Log("msg", "Ignoring device", "device", name)
continue
}
metrics[name] = map[string]uint64{
"receive_bytes": stats.RxBytes,
"receive_packets": stats.RxPackets,
"receive_errors": stats.RxErrors,
"receive_dropped": stats.RxDropped,
"receive_fifo": stats.RxFIFO,
"receive_frame": stats.RxFrame,
"receive_compressed": stats.RxCompressed,
"receive_multicast": stats.RxMulticast,
"transmit_bytes": stats.TxBytes,
"transmit_packets": stats.TxPackets,
"transmit_errors": stats.TxErrors,
"transmit_dropped": stats.TxDropped,
"transmit_fifo": stats.TxFIFO,
"transmit_colls": stats.TxCollisions,
"transmit_carrier": stats.TxCarrier,
"transmit_compressed": stats.TxCompressed,
}
}
return metrics, nil
}