117 lines
3.2 KiB
Go
117 lines
3.2 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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"io/ioutil"
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"path/filepath"
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"github.com/docker/libcontainer/cgroups"
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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/info"
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)
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type rawContainerHandler struct {
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name string
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cgroupSubsystems *cgroupSubsystems
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}
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func newRawContainerHandler(name string, cgroupSubsystems *cgroupSubsystems) (container.ContainerHandler, error) {
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return &rawContainerHandler{
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name: name,
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cgroupSubsystems: cgroupSubsystems,
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}, nil
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}
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func (self *rawContainerHandler) ContainerReference() (info.ContainerReference, error) {
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// We only know the container by its one name.
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return info.ContainerReference{
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Name: self.name,
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}, nil
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}
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func (self *rawContainerHandler) GetSpec() (*info.ContainerSpec, error) {
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ret := new(info.ContainerSpec)
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ret.Cpu = new(info.CpuSpec)
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ret.Memory = new(info.MemorySpec)
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// TODO(vmarmol): Implement
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return ret, nil
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}
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func (self *rawContainerHandler) GetStats() (stats *info.ContainerStats, err error) {
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cgroup := &cgroups.Cgroup{
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Parent: "/",
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Name: self.name,
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}
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return libcontainer.GetStats(cgroup, false)
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}
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// Lists all directories under "path" and outputs the results as children of "parent".
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func listDirectories(path string, parent string, recursive bool, output map[string]struct{}) error {
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entries, err := ioutil.ReadDir(path)
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if err != nil {
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return err
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}
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for _, entry := range entries {
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// We only grab directories.
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if entry.IsDir() {
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name := filepath.Join(parent, entry.Name())
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output[name] = struct{}{}
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// List subcontainers if asked to.
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if recursive {
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err := listDirectories(filepath.Join(path, entry.Name()), name, true, output)
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if err != nil {
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return err
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}
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}
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}
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}
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return nil
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}
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func (self *rawContainerHandler) ListContainers(listType container.ListType) ([]info.ContainerReference, error) {
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containers := make(map[string]struct{}, 16)
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for _, subsystem := range self.cgroupSubsystems.mounts {
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err := listDirectories(filepath.Join(subsystem.Mountpoint, self.name), self.name, listType == container.LIST_RECURSIVE, containers)
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if err != nil {
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return nil, err
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}
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}
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// Make into container references.
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ret := make([]info.ContainerReference, 0, len(containers))
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for cont, _ := range containers {
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ret = append(ret, info.ContainerReference{
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Name: cont,
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})
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}
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return ret, nil
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}
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func (self *rawContainerHandler) ListThreads(listType container.ListType) ([]int, error) {
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// TODO(vmarmol): Implement
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return nil, nil
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}
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func (self *rawContainerHandler) ListProcesses(listType container.ListType) ([]int, error) {
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// TODO(vmarmol): Implement
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return nil, nil
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}
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