46 lines
1.2 KiB
Go
46 lines
1.2 KiB
Go
// +build linux
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package cgroups
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import (
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"github.com/containerd/cgroups"
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metrics "github.com/docker/go-metrics"
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"github.com/prometheus/client_golang/prometheus"
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)
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type value struct {
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v float64
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l []string
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}
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type metric struct {
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name string
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help string
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unit metrics.Unit
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vt prometheus.ValueType
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labels []string
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// getValues returns the value and labels for the data
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getValues func(stats *cgroups.Metrics) []value
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}
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func (m *metric) desc(ns *metrics.Namespace) *prometheus.Desc {
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// the namespace label is for containerd namespaces
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return ns.NewDesc(m.name, m.help, m.unit, append([]string{"container_id", "namespace"}, m.labels...)...)
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}
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func (m *metric) collect(id, namespace string, stats *cgroups.Metrics, ns *metrics.Namespace, ch chan<- prometheus.Metric, block bool) {
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values := m.getValues(stats)
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for _, v := range values {
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// block signals to block on the sending the metrics so none are missed
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if block {
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ch <- prometheus.MustNewConstMetric(m.desc(ns), m.vt, v.v, append([]string{id, namespace}, v.l...)...)
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continue
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}
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// non-blocking metrics can be dropped if the chan is full
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select {
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case ch <- prometheus.MustNewConstMetric(m.desc(ns), m.vt, v.v, append([]string{id, namespace}, v.l...)...):
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default:
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}
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}
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}
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