ston1th/node_exporter
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Migrated everything to new client_golang.

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This commit is contained in:
Bjoern Rabenstein 2014-06-26 19:20:36 +02:00
commit 0563ecd29d
11 changed files with 388 additions and 246 deletions
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145
collector/diskstats.go
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@ -18,35 +18,119 @@ import (
const (
procDiskStats = "/proc/diskstats"
diskSubsystem = "disk"
)
type diskStat struct {
name string
metric prometheus.Metric
documentation string
}
var (
ignoredDevices = flag.String("diskstatsIgnoredDevices", "^(ram|loop|(h|s|xv)d[a-z])\\d+$", "Regexp of devices to ignore for diskstats.")
diskLabelNames = []string{"device"}
// Docs from https://www.kernel.org/doc/Documentation/iostats.txt
diskStatsMetrics = []diskStat{
{"reads_completed", prometheus.NewCounter(), "The total number of reads completed successfully."},
{"reads_merged", prometheus.NewCounter(), "The number of reads merged. See https://www.kernel.org/doc/Documentation/iostats.txt"},
{"sectors_read", prometheus.NewCounter(), "The total number of sectors read successfully."},
{"read_time_ms", prometheus.NewCounter(), "the total number of milliseconds spent by all reads."},
{"writes_completed", prometheus.NewCounter(), "The total number of writes completed successfully."},
{"writes_merged", prometheus.NewCounter(), "The number of writes merged. See https://www.kernel.org/doc/Documentation/iostats.txt"},
{"sectors_written", prometheus.NewCounter(), "The total number of sectors written successfully."},
{"write_time_ms", prometheus.NewCounter(), "This is the total number of milliseconds spent by all writes."},
{"io_now", prometheus.NewGauge(), "The number of I/Os currently in progress."},
{"io_time_ms", prometheus.NewCounter(), "Milliseconds spent doing I/Os."},
{"io_time_weighted", prometheus.NewCounter(), "The weighted # of milliseconds spent doing I/Os. See https://www.kernel.org/doc/Documentation/iostats.txt"},
diskStatsMetrics = []prometheus.Collector{
prometheus.NewCounterVec(
prometheus.CounterOpts{
Namespace: Namespace,
Subsystem: diskSubsystem,
Name: "reads_completed",
Help: "The total number of reads completed successfully.",
},
diskLabelNames,
),
prometheus.NewCounterVec(
prometheus.CounterOpts{
Namespace: Namespace,
Subsystem: diskSubsystem,
Name: "reads_merged",
Help: "The number of reads merged. See https://www.kernel.org/doc/Documentation/iostats.txt.",
},
diskLabelNames,
),
prometheus.NewCounterVec(
prometheus.CounterOpts{
Namespace: Namespace,
Subsystem: diskSubsystem,
Name: "sectors_read",
Help: "The total number of sectors read successfully.",
},
diskLabelNames,
),
prometheus.NewCounterVec(
prometheus.CounterOpts{
Namespace: Namespace,
Subsystem: diskSubsystem,
Name: "read_time_ms",
Help: "The total number of milliseconds spent by all reads.",
},
diskLabelNames,
),
prometheus.NewCounterVec(
prometheus.CounterOpts{
Namespace: Namespace,
Subsystem: diskSubsystem,
Name: "writes_completed",
Help: "The total number of writes completed successfully.",
},
diskLabelNames,
),
prometheus.NewCounterVec(
prometheus.CounterOpts{
Namespace: Namespace,
Subsystem: diskSubsystem,
Name: "writes_merged",
Help: "The number of writes merged. See https://www.kernel.org/doc/Documentation/iostats.txt.",
},
diskLabelNames,
),
prometheus.NewCounterVec(
prometheus.CounterOpts{
Namespace: Namespace,
Subsystem: diskSubsystem,
Name: "sectors_written",
Help: "The total number of sectors written successfully.",
},
diskLabelNames,
),
prometheus.NewCounterVec(
prometheus.CounterOpts{
Namespace: Namespace,
Subsystem: diskSubsystem,
Name: "write_time_ms",
Help: "This is the total number of milliseconds spent by all writes.",
},
diskLabelNames,
),
prometheus.NewGaugeVec(
prometheus.GaugeOpts{
Namespace: Namespace,
Subsystem: diskSubsystem,
Name: "io_now",
Help: "The number of I/Os currently in progress.",
},
diskLabelNames,
),
prometheus.NewCounterVec(
prometheus.CounterOpts{
Namespace: Namespace,
Subsystem: diskSubsystem,
Name: "io_time_ms",
Help: "Milliseconds spent doing I/Os.",
},
diskLabelNames,
),
prometheus.NewCounterVec(
prometheus.CounterOpts{
Namespace: Namespace,
Subsystem: diskSubsystem,
Name: "io_time_weighted",
Help: "The weighted # of milliseconds spent doing I/Os. See https://www.kernel.org/doc/Documentation/iostats.txt.",
},
diskLabelNames,
),
}
)
type diskstatsCollector struct {
registry prometheus.Registry
config Config
ignoredDevicesPattern *regexp.Regexp
}
@ -57,20 +141,16 @@ func init() {
// Takes a config struct and prometheus registry and returns a new Collector exposing
// disk device stats.
func NewDiskstatsCollector(config Config, registry prometheus.Registry) (Collector, error) {
func NewDiskstatsCollector(config Config) (Collector, error) {
c := diskstatsCollector{
config: config,
registry: registry,
ignoredDevicesPattern: regexp.MustCompile(*ignoredDevices),
}
for _, v := range diskStatsMetrics {
registry.Register(
"node_disk_"+v.name,
v.documentation,
prometheus.NilLabels,
v.metric,
)
for _, c := range diskStatsMetrics {
if _, err := prometheus.RegisterOrGet(c); err != nil {
return nil, err
}
}
return &c, nil
}
@ -91,13 +171,12 @@ func (c *diskstatsCollector) Update() (updates int, err error) {
if err != nil {
return updates, fmt.Errorf("Invalid value %s in diskstats: %s", value, err)
}
labels := map[string]string{"device": dev}
counter, ok := diskStatsMetrics[k].metric.(prometheus.Counter)
counter, ok := diskStatsMetrics[k].(*prometheus.CounterVec)
if ok {
counter.Set(labels, v)
counter.WithLabelValues(dev).Set(v)
} else {
var gauge = diskStatsMetrics[k].metric.(prometheus.Gauge)
gauge.Set(labels, v)
var gauge = diskStatsMetrics[k].(*prometheus.GaugeVec)
gauge.WithLabelValues(dev).Set(v)
}
}
}