github.com/containerd/Containerd@v1.4.13/metrics/cgroups/v2/cgroups.go (about)

     1  // +build linux
     2  
     3  /*
     4     Copyright The containerd Authors.
     5  
     6     Licensed under the Apache License, Version 2.0 (the "License");
     7     you may not use this file except in compliance with the License.
     8     You may obtain a copy of the License at
     9  
    10         http://www.apache.org/licenses/LICENSE-2.0
    11  
    12     Unless required by applicable law or agreed to in writing, software
    13     distributed under the License is distributed on an "AS IS" BASIS,
    14     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    15     See the License for the specific language governing permissions and
    16     limitations under the License.
    17  */
    18  
    19  package v2
    20  
    21  import (
    22  	"context"
    23  
    24  	"github.com/containerd/containerd/events"
    25  	"github.com/containerd/containerd/runtime"
    26  	metrics "github.com/docker/go-metrics"
    27  )
    28  
    29  // NewTaskMonitor returns a new cgroups monitor
    30  func NewTaskMonitor(ctx context.Context, publisher events.Publisher, ns *metrics.Namespace) (runtime.TaskMonitor, error) {
    31  	collector := NewCollector(ns)
    32  	return &cgroupsMonitor{
    33  		collector: collector,
    34  		context:   ctx,
    35  		publisher: publisher,
    36  	}, nil
    37  }
    38  
    39  type cgroupsMonitor struct {
    40  	collector *Collector
    41  	context   context.Context
    42  	publisher events.Publisher
    43  }
    44  
    45  func (m *cgroupsMonitor) Monitor(c runtime.Task) error {
    46  	if err := m.collector.Add(c); err != nil {
    47  		return err
    48  	}
    49  	return nil
    50  }
    51  
    52  func (m *cgroupsMonitor) Stop(c runtime.Task) error {
    53  	m.collector.Remove(c)
    54  	return nil
    55  }