79 lines
1.6 KiB
Go
79 lines
1.6 KiB
Go
package cgroups
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import (
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"time"
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"github.com/containerd/cgroups"
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"github.com/containerd/cgroups/prometheus"
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"github.com/containerd/containerd"
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"github.com/containerd/containerd/plugin"
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metrics "github.com/docker/go-metrics"
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"golang.org/x/net/context"
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)
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const name = "cgroups"
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func init() {
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plugin.Register(name, &plugin.Registration{
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Type: plugin.ContainerMonitorPlugin,
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Init: New,
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})
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}
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func New(ic *plugin.InitContext) (interface{}, error) {
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var (
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ns = metrics.NewNamespace("container", "", nil)
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collector = prometheus.New(ns)
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)
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oom, err := prometheus.NewOOMCollector(ns)
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if err != nil {
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return nil, err
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}
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metrics.Register(ns)
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return &cgroupsMonitor{
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collector: collector,
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oom: oom,
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context: ic.Context,
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}, nil
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}
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type cgroupsMonitor struct {
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collector *prometheus.Collector
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oom *prometheus.OOMCollector
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context context.Context
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events chan<- *containerd.Event
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}
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func (m *cgroupsMonitor) Monitor(c plugin.Container) error {
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id := c.Info().ID
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state, err := c.State(m.context)
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if err != nil {
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return err
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}
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cg, err := cgroups.Load(cgroups.V1, cgroups.PidPath(int(state.Pid())))
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if err != nil {
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return err
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}
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if err := m.collector.Add(id, cg); err != nil {
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return err
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}
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return m.oom.Add(id, cg, m.trigger)
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}
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func (m *cgroupsMonitor) Stop(c plugin.Container) error {
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m.collector.Remove(c.Info().ID)
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return nil
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}
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func (m *cgroupsMonitor) Events(events chan<- *containerd.Event) {
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m.events = events
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}
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func (m *cgroupsMonitor) trigger(id string, cg cgroups.Cgroup) {
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m.events <- &containerd.Event{
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Timestamp: time.Now(),
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Type: containerd.OOMEvent,
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ID: id,
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}
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}
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