5ca11bb1a0
playing nice means not elliding the system.slice cgroup but allowing the raw handler to handle it
105 lines
3.0 KiB
Go
105 lines
3.0 KiB
Go
// Copyright 2016 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 rkt
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import (
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"fmt"
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"strings"
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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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"github.com/golang/glog"
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)
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const RktNamespace = "rkt"
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type rktFactory struct {
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machineInfoFactory info.MachineInfoFactory
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cgroupSubsystems *libcontainer.CgroupSubsystems
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fsInfo fs.FsInfo
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ignoreMetrics container.MetricSet
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rktPath string
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}
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func (self *rktFactory) String() string {
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return "rkt"
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}
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func (self *rktFactory) NewContainerHandler(name string, inHostNamespace bool) (container.ContainerHandler, error) {
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client, err := Client()
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if err != nil {
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return nil, err
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}
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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 newRktContainerHandler(name, client, self.rktPath, self.cgroupSubsystems, self.machineInfoFactory, self.fsInfo, rootFs, self.ignoreMetrics)
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}
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func (self *rktFactory) CanHandleAndAccept(name string) (bool, bool, error) {
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// will ignore all cgroup names that don't either correspond to the machine.slice that is the pod or the containers that belong to the pod
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// only works for machined rkt pods at the moment
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if strings.HasPrefix(name, "/machine.slice/machine-rkt\\x2d") {
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accept, err := verifyName(name)
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return accept, accept, err
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}
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return false, false, fmt.Errorf("%s not handled by rkt handler", name)
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}
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func (self *rktFactory) DebugInfo() map[string][]string {
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return map[string][]string{}
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}
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func Register(machineInfoFactory info.MachineInfoFactory, fsInfo fs.FsInfo, ignoreMetrics container.MetricSet) error {
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_, err := Client()
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if err != nil {
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return fmt.Errorf("unable to communicate with Rkt api service: %v", err)
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}
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rktPath, err := RktPath()
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if err != nil {
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return fmt.Errorf("unable to get the RktPath variable %v", err)
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}
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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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glog.Infof("Registering Rkt factory")
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factory := &rktFactory{
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machineInfoFactory: machineInfoFactory,
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fsInfo: fsInfo,
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cgroupSubsystems: &cgroupSubsystems,
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ignoreMetrics: ignoreMetrics,
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rktPath: rktPath,
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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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