// Copyright 2016 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package systemd
import (
"fmt"
"strings"
"github.com/google/cadvisor/container"
"github.com/google/cadvisor/fs"
info "github.com/google/cadvisor/info/v1"
"github.com/google/cadvisor/watcher"
"k8s.io/klog/v2"
)
type systemdFactory struct{}
func (f *systemdFactory) String() string {
return "systemd"
}
func (f *systemdFactory) NewContainerHandler(name string, metadataEnvAllowList []string, inHostNamespace bool) (container.ContainerHandler, error) {
return nil, fmt.Errorf("Not yet supported")
}
func (f *systemdFactory) CanHandleAndAccept(name string) (bool, bool, error) {
// on systemd using devicemapper each mount into the container has an associated cgroup that we ignore.
// for details on .mount units: http://man7.org/linux/man-pages/man5/systemd.mount.5.html
if strings.HasSuffix(name, ".mount") {
return true, false, nil
}
klog.V(5).Infof("%s not handled by systemd handler", name)
return false, false, nil
}
func (f *systemdFactory) DebugInfo() map[string][]string {
return map[string][]string{}
}
// Register registers the systemd container factory.
func Register(machineInfoFactory info.MachineInfoFactory, fsInfo fs.FsInfo, includedMetrics container.MetricSet) error {
klog.V(1).Infof("Registering systemd factory")
factory := &systemdFactory{}
container.RegisterContainerHandlerFactory(factory, []watcher.ContainerWatchSource{watcher.Raw})
return nil
}