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// Copyright 2017 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 !noqdisc
package collector
import (
"encoding/json"
"io/ioutil"
"path/filepath"
"github.com/ema/qdisc"
"github.com/go-kit/kit/log"
"github.com/prometheus/client_golang/prometheus"
"gopkg.in/alecthomas/kingpin.v2"
)
type qdiscStatCollector struct {
bytes typedDesc
packets typedDesc
drops typedDesc
requeues typedDesc
overlimits typedDesc
logger log.Logger
}
var (
collectorQdisc = kingpin.Flag("collector.qdisc.fixtures", "test fixtures to use for qdisc collector end-to-end testing").Default("").String()
)
func init() {
registerCollector("qdisc", defaultDisabled, NewQdiscStatCollector)
}
// NewQdiscStatCollector returns a new Collector exposing queuing discipline statistics.
func NewQdiscStatCollector(logger log.Logger) (Collector, error) {
return &qdiscStatCollector{
bytes: typedDesc{prometheus.NewDesc(
prometheus.BuildFQName(namespace, "qdisc", "bytes_total"),
"Number of bytes sent.",
[]string{"device", "kind"}, nil,
), prometheus.CounterValue},
packets: typedDesc{prometheus.NewDesc(
prometheus.BuildFQName(namespace, "qdisc", "packets_total"),
"Number of packets sent.",
[]string{"device", "kind"}, nil,
), prometheus.CounterValue},
drops: typedDesc{prometheus.NewDesc(
prometheus.BuildFQName(namespace, "qdisc", "drops_total"),
"Number of packets dropped.",
[]string{"device", "kind"}, nil,
), prometheus.CounterValue},
requeues: typedDesc{prometheus.NewDesc(
prometheus.BuildFQName(namespace, "qdisc", "requeues_total"),
"Number of packets dequeued, not transmitted, and requeued.",
[]string{"device", "kind"}, nil,
), prometheus.CounterValue},
overlimits: typedDesc{prometheus.NewDesc(
prometheus.BuildFQName(namespace, "qdisc", "overlimits_total"),
"Number of overlimit packets.",
[]string{"device", "kind"}, nil,
), prometheus.CounterValue},
logger: logger,
}, nil
}
func testQdiscGet(fixtures string) ([]qdisc.QdiscInfo, error) {
var res []qdisc.QdiscInfo
b, err := ioutil.ReadFile(filepath.Join(fixtures, "results.json"))
if err != nil {
return res, err
}
err = json.Unmarshal(b, &res)
return res, err
}
func (c *qdiscStatCollector) Update(ch chan<- prometheus.Metric) error {
var msgs []qdisc.QdiscInfo
var err error
fixtures := *collectorQdisc
if fixtures == "" {
msgs, err = qdisc.Get()
} else {
msgs, err = testQdiscGet(fixtures)
}
if err != nil {
return err
}
for _, msg := range msgs {
// Only report root qdisc information.
if msg.Parent != 0 {
continue
}
ch <- c.bytes.mustNewConstMetric(float64(msg.Bytes), msg.IfaceName, msg.Kind)
ch <- c.packets.mustNewConstMetric(float64(msg.Packets), msg.IfaceName, msg.Kind)
ch <- c.drops.mustNewConstMetric(float64(msg.Drops), msg.IfaceName, msg.Kind)
ch <- c.requeues.mustNewConstMetric(float64(msg.Requeues), msg.IfaceName, msg.Kind)
ch <- c.overlimits.mustNewConstMetric(float64(msg.Overlimits), msg.IfaceName, msg.Kind)
}
return nil
}
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