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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.
// +build !noipvs
package collector
import (
"fmt"
"os"
"strconv"
"github.com/go-kit/kit/log"
"github.com/go-kit/kit/log/level"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/procfs"
)
type ipvsCollector struct {
Collector
fs procfs.FS
backendConnectionsActive, backendConnectionsInact, backendWeight typedDesc
connections, incomingPackets, outgoingPackets, incomingBytes, outgoingBytes typedDesc
logger log.Logger
}
func init() {
registerCollector("ipvs", defaultEnabled, NewIPVSCollector)
}
// NewIPVSCollector sets up a new collector for IPVS metrics. It accepts the
// "procfs" config parameter to override the default proc location (/proc).
func NewIPVSCollector(logger log.Logger) (Collector, error) {
return newIPVSCollector(logger)
}
func newIPVSCollector(logger log.Logger) (*ipvsCollector, error) {
var (
ipvsBackendLabelNames = []string{
"local_address",
"local_port",
"remote_address",
"remote_port",
"proto",
"local_mark",
}
c ipvsCollector
err error
subsystem = "ipvs"
)
c.logger = logger
c.fs, err = procfs.NewFS(*procPath)
if err != nil {
return nil, fmt.Errorf("failed to open procfs: %w", err)
}
c.connections = typedDesc{prometheus.NewDesc(
prometheus.BuildFQName(namespace, subsystem, "connections_total"),
"The total number of connections made.",
nil, nil,
), prometheus.CounterValue}
c.incomingPackets = typedDesc{prometheus.NewDesc(
prometheus.BuildFQName(namespace, subsystem, "incoming_packets_total"),
"The total number of incoming packets.",
nil, nil,
), prometheus.CounterValue}
c.outgoingPackets = typedDesc{prometheus.NewDesc(
prometheus.BuildFQName(namespace, subsystem, "outgoing_packets_total"),
"The total number of outgoing packets.",
nil, nil,
), prometheus.CounterValue}
c.incomingBytes = typedDesc{prometheus.NewDesc(
prometheus.BuildFQName(namespace, subsystem, "incoming_bytes_total"),
"The total amount of incoming data.",
nil, nil,
), prometheus.CounterValue}
c.outgoingBytes = typedDesc{prometheus.NewDesc(
prometheus.BuildFQName(namespace, subsystem, "outgoing_bytes_total"),
"The total amount of outgoing data.",
nil, nil,
), prometheus.CounterValue}
c.backendConnectionsActive = typedDesc{prometheus.NewDesc(
prometheus.BuildFQName(namespace, subsystem, "backend_connections_active"),
"The current active connections by local and remote address.",
ipvsBackendLabelNames, nil,
), prometheus.GaugeValue}
c.backendConnectionsInact = typedDesc{prometheus.NewDesc(
prometheus.BuildFQName(namespace, subsystem, "backend_connections_inactive"),
"The current inactive connections by local and remote address.",
ipvsBackendLabelNames, nil,
), prometheus.GaugeValue}
c.backendWeight = typedDesc{prometheus.NewDesc(
prometheus.BuildFQName(namespace, subsystem, "backend_weight"),
"The current backend weight by local and remote address.",
ipvsBackendLabelNames, nil,
), prometheus.GaugeValue}
return &c, nil
}
func (c *ipvsCollector) Update(ch chan<- prometheus.Metric) error {
ipvsStats, err := c.fs.IPVSStats()
if err != nil {
// Cannot access ipvs metrics, report no error.
if os.IsNotExist(err) {
level.Debug(c.logger).Log("msg", "ipvs collector metrics are not available for this system")
return ErrNoData
}
return fmt.Errorf("could not get IPVS stats: %s", err)
}
ch <- c.connections.mustNewConstMetric(float64(ipvsStats.Connections))
ch <- c.incomingPackets.mustNewConstMetric(float64(ipvsStats.IncomingPackets))
ch <- c.outgoingPackets.mustNewConstMetric(float64(ipvsStats.OutgoingPackets))
ch <- c.incomingBytes.mustNewConstMetric(float64(ipvsStats.IncomingBytes))
ch <- c.outgoingBytes.mustNewConstMetric(float64(ipvsStats.OutgoingBytes))
backendStats, err := c.fs.IPVSBackendStatus()
if err != nil {
return fmt.Errorf("could not get backend status: %s", err)
}
for _, backend := range backendStats {
localAddress := ""
if backend.LocalAddress.String() != "<nil>" {
localAddress = backend.LocalAddress.String()
}
labelValues := []string{
localAddress,
strconv.FormatUint(uint64(backend.LocalPort), 10),
backend.RemoteAddress.String(),
strconv.FormatUint(uint64(backend.RemotePort), 10),
backend.Proto,
backend.LocalMark,
}
ch <- c.backendConnectionsActive.mustNewConstMetric(float64(backend.ActiveConn), labelValues...)
ch <- c.backendConnectionsInact.mustNewConstMetric(float64(backend.InactConn), labelValues...)
ch <- c.backendWeight.mustNewConstMetric(float64(backend.Weight), labelValues...)
}
return nil
}
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