7ddc75c41b
commit6bf9fe89f6Author: Satnam Singh <satnam@google.com> Date: Fri Sep 26 10:23:16 2014 -0700 Change error to warning during handling check. commitc580907183Author: Satnam Singh <satnam@google.com> Date: Fri Sep 26 10:21:41 2014 -0700 Decapatalise fmt.Errorf error messages. commit3ecc5745d6Author: Satnam Singh <satnam@google.com> Date: Fri Sep 26 10:19:15 2014 -0700 Fix misunderstanding about when CanHandle fails. commitadce0c5433Author: Satnam Singh <satnam@google.com> Date: Fri Sep 26 10:13:32 2014 -0700 Change the interface of CanHandle to return error information.
97 lines
2.7 KiB
Go
97 lines
2.7 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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"fmt"
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"github.com/docker/libcontainer/cgroups"
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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/info"
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)
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type cgroupSubsystems struct {
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// Cgroup subsystem mounts.
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mounts []cgroups.Mount
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// Cgroup subsystem to their mount location.
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mountPoints map[string]string
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}
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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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cgroupSubsystems *cgroupSubsystems
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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) (container.ContainerHandler, error) {
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return newRawContainerHandler(name, self.cgroupSubsystems, self.machineInfoFactory)
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}
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// The raw factory can handle any container.
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func (self *rawFactory) CanHandle(name string) (bool, error) {
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return true, nil
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}
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func Register(machineInfoFactory info.MachineInfoFactory) error {
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// Get all cgroup mounts.
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allCgroups, err := cgroups.GetCgroupMounts()
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if err != nil {
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return err
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}
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if len(allCgroups) == 0 {
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return fmt.Errorf("failed to find cgroup mounts for the raw factory")
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}
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// Trim the mounts to only the subsystems we care about.
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supportedCgroups := make([]cgroups.Mount, 0, len(allCgroups))
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mountPoints := make(map[string]string, len(allCgroups))
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for _, mount := range allCgroups {
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for _, subsystem := range mount.Subsystems {
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if _, ok := supportedSubsystems[subsystem]; ok {
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supportedCgroups = append(supportedCgroups, mount)
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mountPoints[subsystem] = mount.Mountpoint
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}
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}
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}
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if len(supportedCgroups) == 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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glog.Infof("Registering Raw factory")
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factory := &rawFactory{
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machineInfoFactory: machineInfoFactory,
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cgroupSubsystems: &cgroupSubsystems{
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mounts: supportedCgroups,
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mountPoints: mountPoints,
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},
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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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// Cgroup subsystems we support listing (should be the minimal set we need stats from).
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var supportedSubsystems map[string]struct{} = map[string]struct{}{
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"cpu": {},
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"cpuacct": {},
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"memory": {},
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"cpuset": {},
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}
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