7e10398a50
Reasons discussed in https://github.com/google/cadvisor/issues/822#issuecomment-135811901 & following.
103 lines
3.0 KiB
Go
103 lines
3.0 KiB
Go
// Copyright 2014 Google Inc. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package raw
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import (
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"flag"
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"fmt"
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"github.com/golang/glog"
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"github.com/google/cadvisor/container"
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"github.com/google/cadvisor/container/libcontainer"
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"github.com/google/cadvisor/fs"
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info "github.com/google/cadvisor/info/v1"
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)
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var dockerOnly = flag.Bool("docker_only", false, "Only report docker containers in addition to root stats")
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type rawFactory struct {
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// Factory for machine information.
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machineInfoFactory info.MachineInfoFactory
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// Information about the cgroup subsystems.
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cgroupSubsystems *libcontainer.CgroupSubsystems
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// Information about mounted filesystems.
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fsInfo fs.FsInfo
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// Watcher for inotify events.
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watcher *InotifyWatcher
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}
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func (self *rawFactory) String() string {
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return "raw"
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}
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func (self *rawFactory) NewContainerHandler(name string, inHostNamespace bool) (container.ContainerHandler, error) {
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rootFs := "/"
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if !inHostNamespace {
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rootFs = "/rootfs"
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}
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return newRawContainerHandler(name, self.cgroupSubsystems, self.machineInfoFactory, self.fsInfo, self.watcher, rootFs)
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}
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// The raw factory can handle any container. If --docker_only is set to false, non-docker containers are ignored.
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func (self *rawFactory) CanHandleAndAccept(name string) (bool, bool, error) {
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accept := name == "/" || !*dockerOnly
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return true, accept, nil
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}
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func (self *rawFactory) DebugInfo() map[string][]string {
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out := make(map[string][]string)
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// Get information about inotify watches.
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watches := self.watcher.GetWatches()
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lines := make([]string, 0, len(watches))
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for containerName, cgroupWatches := range watches {
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lines = append(lines, fmt.Sprintf("%s:", containerName))
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for _, cg := range cgroupWatches {
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lines = append(lines, fmt.Sprintf("\t%s", cg))
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}
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}
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out["Inotify watches"] = lines
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return out
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}
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func Register(machineInfoFactory info.MachineInfoFactory, fsInfo fs.FsInfo) error {
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cgroupSubsystems, err := libcontainer.GetCgroupSubsystems()
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if err != nil {
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return fmt.Errorf("failed to get cgroup subsystems: %v", err)
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}
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if len(cgroupSubsystems.Mounts) == 0 {
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return fmt.Errorf("failed to find supported cgroup mounts for the raw factory")
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}
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watcher, err := NewInotifyWatcher()
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if err != nil {
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return err
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}
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glog.Infof("Registering Raw factory")
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factory := &rawFactory{
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machineInfoFactory: machineInfoFactory,
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fsInfo: fsInfo,
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cgroupSubsystems: &cgroupSubsystems,
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watcher: watcher,
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}
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container.RegisterContainerHandlerFactory(factory)
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return nil
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}
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