github.com/google/cadvisor@v0.49.1/container/systemd/factory.go (about)

     1  // Copyright 2016 Google Inc. All Rights Reserved.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package systemd
    16  
    17  import (
    18  	"fmt"
    19  	"strings"
    20  
    21  	"github.com/google/cadvisor/container"
    22  	"github.com/google/cadvisor/fs"
    23  	info "github.com/google/cadvisor/info/v1"
    24  	"github.com/google/cadvisor/watcher"
    25  
    26  	"k8s.io/klog/v2"
    27  )
    28  
    29  type systemdFactory struct{}
    30  
    31  func (f *systemdFactory) String() string {
    32  	return "systemd"
    33  }
    34  
    35  func (f *systemdFactory) NewContainerHandler(name string, metadataEnvAllowList []string, inHostNamespace bool) (container.ContainerHandler, error) {
    36  	return nil, fmt.Errorf("Not yet supported")
    37  }
    38  
    39  func (f *systemdFactory) CanHandleAndAccept(name string) (bool, bool, error) {
    40  	// on systemd using devicemapper each mount into the container has an associated cgroup that we ignore.
    41  	// for details on .mount units: http://man7.org/linux/man-pages/man5/systemd.mount.5.html
    42  	if strings.HasSuffix(name, ".mount") {
    43  		return true, false, nil
    44  	}
    45  	klog.V(5).Infof("%s not handled by systemd handler", name)
    46  	return false, false, nil
    47  }
    48  
    49  func (f *systemdFactory) DebugInfo() map[string][]string {
    50  	return map[string][]string{}
    51  }
    52  
    53  // Register registers the systemd container factory.
    54  func Register(machineInfoFactory info.MachineInfoFactory, fsInfo fs.FsInfo, includedMetrics container.MetricSet) error {
    55  	klog.V(1).Infof("Registering systemd factory")
    56  	factory := &systemdFactory{}
    57  	container.RegisterContainerHandlerFactory(factory, []watcher.ContainerWatchSource{watcher.Raw})
    58  	return nil
    59  }