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Merge pull request #2320 from dims/drop-support-for-rkt

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Drop support for rkt - which is now archived
This commit is contained in:
David Ashpole 2019-10-07 11:29:27 -07:00 committed by GitHub
commit 10bce1cd55
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GPG Key ID: 4AEE18F83AFDEB23
20 changed files with 2 additions and 3541 deletions
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5
Godeps/Godeps.json generated
View File

@ -241,11 +241,6 @@
"Comment": "v2",
"Rev": "7f080b6c11ac2d2347c3cd7521e810207ea1a041"
},
{
"ImportPath": "github.com/coreos/rkt/api/v1alpha",
"Comment": "v1.25.0",
"Rev": "ec37f3cb649bfb72408906e7cbf330e4aeda1075"
},
{
"ImportPath": "github.com/cyphar/filepath-securejoin",
"Comment": "v0.2.1-1-gae69057",

1
container/container.go
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@ -32,7 +32,6 @@ type ContainerType int
const (
ContainerTypeRaw ContainerType = iota
ContainerTypeDocker
ContainerTypeRkt
ContainerTypeSystemd
ContainerTypeCrio
ContainerTypeContainerd

1
container/install/install.go
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@ -20,6 +20,5 @@ import (
_ "github.com/google/cadvisor/container/crio/install"
_ "github.com/google/cadvisor/container/docker/install"
_ "github.com/google/cadvisor/container/mesos/install"
_ "github.com/google/cadvisor/container/rkt/install"
_ "github.com/google/cadvisor/container/systemd/install"
)

96
container/rkt/client.go
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@ -1,96 +0,0 @@
// 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 rkt
import (
"fmt"
"net"
"sync"
"time"
"github.com/blang/semver"
rktapi "github.com/coreos/rkt/api/v1alpha"
"golang.org/x/net/context"
"google.golang.org/grpc"
)
const (
defaultRktAPIServiceAddr = "localhost:15441"
timeout = 2 * time.Second
minimumRktBinVersion = "1.6.0"
)
var (
rktClient rktapi.PublicAPIClient
rktClientErr error
once sync.Once
)
func Client() (rktapi.PublicAPIClient, error) {
once.Do(func() {
conn, err := net.DialTimeout("tcp", defaultRktAPIServiceAddr, timeout)
if err != nil {
rktClient = nil
rktClientErr = fmt.Errorf("rkt: cannot tcp Dial rkt api service: %v", err)
return
}
conn.Close()
apisvcConn, err := grpc.Dial(defaultRktAPIServiceAddr, grpc.WithInsecure(), grpc.WithTimeout(timeout))
if err != nil {
rktClient = nil
rktClientErr = fmt.Errorf("rkt: cannot grpc Dial rkt api service: %v", err)
return
}
apisvc := rktapi.NewPublicAPIClient(apisvcConn)
resp, err := apisvc.GetInfo(context.Background(), &rktapi.GetInfoRequest{})
if err != nil {
rktClientErr = fmt.Errorf("rkt: GetInfo() failed: %v", err)
return
}
binVersion, err := semver.Make(resp.Info.RktVersion)
if err != nil {
rktClientErr = fmt.Errorf("rkt: couldn't parse RtVersion: %v", err)
return
}
if binVersion.LT(semver.MustParse(minimumRktBinVersion)) {
rktClientErr = fmt.Errorf("rkt: binary version is too old(%v), requires at least %v", resp.Info.RktVersion, minimumRktBinVersion)
return
}
rktClient = apisvc
})
return rktClient, rktClientErr
}
func RktPath() (string, error) {
client, err := Client()
if err != nil {
return "", err
}
resp, err := client.GetInfo(context.Background(), &rktapi.GetInfoRequest{})
if err != nil {
return "", fmt.Errorf("couldn't GetInfo from rkt api service: %v", err)
}
return resp.Info.GlobalFlags.Dir, nil
}

28
container/rkt/client_test.go
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@ -1,28 +0,0 @@
// 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 rkt
import (
"testing"
"github.com/blang/semver"
)
func TestMinParse(t *testing.T) {
_, err := semver.Make(minimumRktBinVersion)
if err != nil {
t.Errorf("Couldn't parse the minimumRktBinVersion(%v): %v", minimumRktBinVersion, err)
}
}

99
container/rkt/factory.go
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@ -1,99 +0,0 @@
// 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 rkt
import (
"fmt"
"github.com/google/cadvisor/container"
"github.com/google/cadvisor/container/libcontainer"
"github.com/google/cadvisor/fs"
info "github.com/google/cadvisor/info/v1"
"github.com/google/cadvisor/watcher"
"k8s.io/klog"
)
const RktNamespace = "rkt"
type rktFactory struct {
machineInfoFactory info.MachineInfoFactory
cgroupSubsystems *libcontainer.CgroupSubsystems
fsInfo fs.FsInfo
includedMetrics container.MetricSet
rktPath string
}
func (self *rktFactory) String() string {
return "rkt"
}
func (self *rktFactory) NewContainerHandler(name string, inHostNamespace bool) (container.ContainerHandler, error) {
client, err := Client()
if err != nil {
return nil, err
}
rootFs := "/"
if !inHostNamespace {
rootFs = "/rootfs"
}
return newRktContainerHandler(name, client, self.rktPath, self.cgroupSubsystems, self.machineInfoFactory, self.fsInfo, rootFs, self.includedMetrics)
}
func (self *rktFactory) CanHandleAndAccept(name string) (bool, bool, error) {
accept, err := verifyPod(name)
return accept, accept, err
}
func (self *rktFactory) DebugInfo() map[string][]string {
return map[string][]string{}
}
func Register(machineInfoFactory info.MachineInfoFactory, fsInfo fs.FsInfo, includedMetrics container.MetricSet) error {
_, err := Client()
if err != nil {
return fmt.Errorf("unable to communicate with Rkt api service: %v", err)
}
rktPath, err := RktPath()
if err != nil {
return fmt.Errorf("unable to get the RktPath variable %v", err)
}
cgroupSubsystems, err := libcontainer.GetCgroupSubsystems(includedMetrics)
if err != nil {
return fmt.Errorf("failed to get cgroup subsystems: %v", err)
}
if len(cgroupSubsystems.Mounts) == 0 {
return fmt.Errorf("failed to find supported cgroup mounts for the raw factory")
}
klog.V(1).Infof("Registering Rkt factory")
factory := &rktFactory{
machineInfoFactory: machineInfoFactory,
fsInfo: fsInfo,
cgroupSubsystems: &cgroupSubsystems,
includedMetrics: includedMetrics,
rktPath: rktPath,
}
container.RegisterContainerHandlerFactory(factory, []watcher.ContainerWatchSource{watcher.Rkt})
return nil
}

280
container/rkt/handler.go
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@ -1,280 +0,0 @@
// 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.
// Handler for "rkt" containers.
package rkt
import (
"fmt"
"os"
rktapi "github.com/coreos/rkt/api/v1alpha"
"github.com/google/cadvisor/container"
"github.com/google/cadvisor/container/common"
"github.com/google/cadvisor/container/libcontainer"
"github.com/google/cadvisor/fs"
info "github.com/google/cadvisor/info/v1"
"golang.org/x/net/context"
cgroupfs "github.com/opencontainers/runc/libcontainer/cgroups/fs"
"github.com/opencontainers/runc/libcontainer/configs"
"k8s.io/klog"
)
type rktContainerHandler struct {
machineInfoFactory info.MachineInfoFactory
// Absolute path to the cgroup hierarchies of this container.
// (e.g.: "cpu" -> "/sys/fs/cgroup/cpu/test")
cgroupPaths map[string]string
fsInfo fs.FsInfo
isPod bool
rootfsStorageDir string
// Filesystem handler.
fsHandler common.FsHandler
includedMetrics container.MetricSet
apiPod *rktapi.Pod
labels map[string]string
reference info.ContainerReference
libcontainerHandler *libcontainer.Handler
}
func newRktContainerHandler(name string, rktClient rktapi.PublicAPIClient, rktPath string, cgroupSubsystems *libcontainer.CgroupSubsystems, machineInfoFactory info.MachineInfoFactory, fsInfo fs.FsInfo, rootFs string, includedMetrics container.MetricSet) (container.ContainerHandler, error) {
aliases := make([]string, 1)
isPod := false
apiPod := &rktapi.Pod{}
parsed, err := parseName(name)
if err != nil {
return nil, fmt.Errorf("this should be impossible!, new handler failing, but factory allowed, name = %s", name)
}
// rktnetes uses containerID: rkt://fff40827-b994-4e3a-8f88-6427c2c8a5ac:nginx
if parsed.Container == "" {
isPod = true
aliases = append(aliases, "rkt://"+parsed.Pod)
} else {
aliases = append(aliases, "rkt://"+parsed.Pod+":"+parsed.Container)
}
pid := os.Getpid()
labels := make(map[string]string)
resp, err := rktClient.InspectPod(context.Background(), &rktapi.InspectPodRequest{
Id: parsed.Pod,
})
if err != nil {
return nil, err
}
annotations := resp.Pod.Annotations
if parsed.Container != "" { // As not empty string, an App container
if contAnnotations, ok := findAnnotations(resp.Pod.Apps, parsed.Container); !ok {
klog.Warningf("couldn't find app %v in pod", parsed.Container)
} else {
annotations = append(annotations, contAnnotations...)
}
} else { // The Pod container
pid = int(resp.Pod.Pid)
apiPod = resp.Pod
}
labels = createLabels(annotations)
cgroupPaths := common.MakeCgroupPaths(cgroupSubsystems.MountPoints, name)
// Generate the equivalent cgroup manager for this container.
cgroupManager := &cgroupfs.Manager{
Cgroups: &configs.Cgroup{
Name: name,
},
Paths: cgroupPaths,
}
libcontainerHandler := libcontainer.NewHandler(cgroupManager, rootFs, pid, includedMetrics)
rootfsStorageDir := getRootFs(rktPath, parsed)
containerReference := info.ContainerReference{
Name: name,
Aliases: aliases,
Namespace: RktNamespace,
}
handler := &rktContainerHandler{
machineInfoFactory: machineInfoFactory,
cgroupPaths: cgroupPaths,
fsInfo: fsInfo,
isPod: isPod,
rootfsStorageDir: rootfsStorageDir,
includedMetrics: includedMetrics,
apiPod: apiPod,
labels: labels,
reference: containerReference,
libcontainerHandler: libcontainerHandler,
}
if includedMetrics.Has(container.DiskUsageMetrics) {
handler.fsHandler = common.NewFsHandler(common.DefaultPeriod, rootfsStorageDir, "", fsInfo)
}
return handler, nil
}
func findAnnotations(apps []*rktapi.App, container string) ([]*rktapi.KeyValue, bool) {
for _, app := range apps {
if app.Name == container {
return app.Annotations, true
}
}
return nil, false
}
func createLabels(annotations []*rktapi.KeyValue) map[string]string {
labels := make(map[string]string)
for _, kv := range annotations {
labels[kv.Key] = kv.Value
}
return labels
}
func (handler *rktContainerHandler) ContainerReference() (info.ContainerReference, error) {
return handler.reference, nil
}
func (handler *rktContainerHandler) Start() {
handler.fsHandler.Start()
}
func (handler *rktContainerHandler) Cleanup() {
handler.fsHandler.Stop()
}
func (handler *rktContainerHandler) GetSpec() (info.ContainerSpec, error) {
hasNetwork := handler.isPod && handler.includedMetrics.Has(container.NetworkUsageMetrics)
hasFilesystem := handler.includedMetrics.Has(container.DiskUsageMetrics)
spec, err := common.GetSpec(handler.cgroupPaths, handler.machineInfoFactory, hasNetwork, hasFilesystem)
spec.Labels = handler.labels
return spec, err
}
func (handler *rktContainerHandler) getFsStats(stats *info.ContainerStats) error {
mi, err := handler.machineInfoFactory.GetMachineInfo()
if err != nil {
return err
}
if handler.includedMetrics.Has(container.DiskIOMetrics) {
common.AssignDeviceNamesToDiskStats((*common.MachineInfoNamer)(mi), &stats.DiskIo)
}
if !handler.includedMetrics.Has(container.DiskUsageMetrics) {
return nil
}
deviceInfo, err := handler.fsInfo.GetDirFsDevice(handler.rootfsStorageDir)
if err != nil {
return err
}
var limit uint64 = 0
// Use capacity as limit.
for _, fs := range mi.Filesystems {
if fs.Device == deviceInfo.Device {
limit = fs.Capacity
break
}
}
fsStat := info.FsStats{Device: deviceInfo.Device, Limit: limit}
usage := handler.fsHandler.Usage()
fsStat.BaseUsage = usage.BaseUsageBytes
fsStat.Usage = usage.TotalUsageBytes
fsStat.Inodes = usage.InodeUsage
stats.Filesystem = append(stats.Filesystem, fsStat)
return nil
}
func (handler *rktContainerHandler) GetStats() (*info.ContainerStats, error) {
stats, err := handler.libcontainerHandler.GetStats()
if err != nil {
return stats, err
}
// Get filesystem stats.
err = handler.getFsStats(stats)
if err != nil {
return stats, err
}
return stats, nil
}
func (self *rktContainerHandler) GetContainerIPAddress() string {
// attempt to return the ip address of the pod
// if a specific ip address of the pod could not be determined, return the system ip address
if self.isPod && len(self.apiPod.Networks) > 0 {
address := self.apiPod.Networks[0].Ipv4
if address != "" {
return address
} else {
return self.apiPod.Networks[0].Ipv6
}
} else {
return "127.0.0.1"
}
}
func (handler *rktContainerHandler) GetCgroupPath(resource string) (string, error) {
path, ok := handler.cgroupPaths[resource]
if !ok {
return "", fmt.Errorf("could not find path for resource %q for container %q\n", resource, handler.reference.Name)
}
return path, nil
}
func (handler *rktContainerHandler) GetContainerLabels() map[string]string {
return handler.labels
}
func (handler *rktContainerHandler) ListContainers(listType container.ListType) ([]info.ContainerReference, error) {
return common.ListContainers(handler.reference.Name, handler.cgroupPaths, listType)
}
func (handler *rktContainerHandler) ListProcesses(listType container.ListType) ([]int, error) {
return handler.libcontainerHandler.GetProcesses()
}
func (handler *rktContainerHandler) Exists() bool {
return common.CgroupExists(handler.cgroupPaths)
}
func (handler *rktContainerHandler) Type() container.ContainerType {
return container.ContainerTypeRkt
}

141
container/rkt/helpers.go
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@ -1,141 +0,0 @@
// 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 rkt
import (
"fmt"
"io/ioutil"
"path"
"strings"
rktapi "github.com/coreos/rkt/api/v1alpha"
"golang.org/x/net/context"
"k8s.io/klog"
)
type parsedName struct {
Pod string
Container string
}
func verifyPod(name string) (bool, error) {
pod, err := cgroupToPod(name)
if err != nil || pod == nil {
return false, err
}
// Anything handler can handle is also accepted.
// Accept cgroups that are sub the pod cgroup, except "system.slice"
// - "system.slice" doesn't contain any processes itself
accept := !strings.HasSuffix(name, "/system.slice")
return accept, nil
}
func cgroupToPod(name string) (*rktapi.Pod, error) {
rktClient, err := Client()
if err != nil {
return nil, fmt.Errorf("couldn't get rkt api service: %v", err)
}
resp, err := rktClient.ListPods(context.Background(), &rktapi.ListPodsRequest{
Filters: []*rktapi.PodFilter{
{
States: []rktapi.PodState{rktapi.PodState_POD_STATE_RUNNING},
PodSubCgroups: []string{name},
},
},
})
if err != nil {
return nil, fmt.Errorf("failed to list pods: %v", err)
}
if len(resp.Pods) == 0 {
return nil, nil
}
if len(resp.Pods) != 1 {
return nil, fmt.Errorf("returned %d (expected 1) pods for cgroup %v", len(resp.Pods), name)
}
return resp.Pods[0], nil
}
/* Parse cgroup name into a pod/container name struct
Example cgroup fs name
pod - /machine.slice/machine-rkt\\x2df556b64a\\x2d17a7\\x2d47d7\\x2d93ec\\x2def2275c3d67e.scope/
or /system.slice/k8s-..../
container under pod - /machine.slice/machine-rkt\\x2df556b64a\\x2d17a7\\x2d47d7\\x2d93ec\\x2def2275c3d67e.scope/system.slice/alpine-sh.service
or /system.slice/k8s-..../system.slice/pause.service
*/
func parseName(name string) (*parsedName, error) {
pod, err := cgroupToPod(name)
if err != nil {
return nil, fmt.Errorf("parseName: couldn't convert %v to a rkt pod: %v", name, err)
}
if pod == nil {
return nil, fmt.Errorf("parseName: didn't return a pod for %v", name)
}
splits := strings.Split(name, "/")
parsed := &parsedName{}
if len(splits) == 3 || len(splits) == 5 {
parsed.Pod = pod.Id
if len(splits) == 5 {
parsed.Container = strings.Replace(splits[4], ".service", "", -1)
}
return parsed, nil
}
return nil, fmt.Errorf("%s not handled by rkt handler", name)
}
// Gets a Rkt container's overlay upper dir
func getRootFs(root string, parsed *parsedName) string {
/* Example of where it stores the upper dir key
for container
/var/lib/rkt/pods/run/bc793ec6-c48f-4480-99b5-6bec16d52210/appsinfo/alpine-sh/treeStoreID
for pod
/var/lib/rkt/pods/run/f556b64a-17a7-47d7-93ec-ef2275c3d67e/stage1TreeStoreID
*/
var tree string
if parsed.Container == "" {
tree = path.Join(root, "pods/run", parsed.Pod, "stage1TreeStoreID")
} else {
tree = path.Join(root, "pods/run", parsed.Pod, "appsinfo", parsed.Container, "treeStoreID")
}
bytes, err := ioutil.ReadFile(tree)
if err != nil {
klog.Errorf("ReadFile failed, couldn't read %v to get upper dir: %v", tree, err)
return ""
}
s := string(bytes)
/* Example of where the upper dir is stored via key read above
/var/lib/rkt/pods/run/bc793ec6-c48f-4480-99b5-6bec16d52210/overlay/deps-sha512-82a099e560a596662b15dec835e9adabab539cad1f41776a30195a01a8f2f22b/
*/
return path.Join(root, "pods/run", parsed.Pod, "overlay", s)
}

29
container/rkt/install/install.go
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@ -1,29 +0,0 @@
// Copyright 2019 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.
// The install package registers rkt.NewPlugin() as the "rkt" container provider when imported
package install
import (
"github.com/google/cadvisor/container"
"github.com/google/cadvisor/container/rkt"
"k8s.io/klog"
)
func init() {
err := container.RegisterPlugin("rkt", rkt.NewPlugin())
if err != nil {
klog.Fatalf("Failed to register rkt plugin: %v", err)
}
}

47
container/rkt/plugin.go
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@ -1,47 +0,0 @@
// Copyright 2019 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 rkt
import (
"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"
)
// NewPlugin returns an implementation of container.Plugin suitable for passing to container.RegisterPlugin()
func NewPlugin() container.Plugin {
return &plugin{}
}
type plugin struct{}
func (p *plugin) InitializeFSContext(context *fs.Context) error {
if tmpRktPath, err := RktPath(); err != nil {
klog.V(5).Infof("Rkt not connected: %v", err)
} else {
context.RktPath = tmpRktPath
}
return nil
}
func (p *plugin) Register(factory info.MachineInfoFactory, fsInfo fs.FsInfo, includedMetrics container.MetricSet) (watcher.ContainerWatcher, error) {
err := Register(factory, fsInfo, includedMetrics)
if err != nil {
return nil, err
}
return NewRktContainerWatcher()
}

153
container/rkt/watcher.go
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@ -1,153 +0,0 @@
// 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 rkt implements the watcher interface for rkt
package rkt
import (
"path/filepath"
"time"
"github.com/google/cadvisor/watcher"
rktapi "github.com/coreos/rkt/api/v1alpha"
"golang.org/x/net/context"
"k8s.io/klog"
)
type rktContainerWatcher struct {
// Signal for watcher thread to stop.
stopWatcher chan error
}
func NewRktContainerWatcher() (watcher.ContainerWatcher, error) {
watcher := &rktContainerWatcher{
stopWatcher: make(chan error),
}
return watcher, nil
}
func (self *rktContainerWatcher) Start(events chan watcher.ContainerEvent) error {
go self.detectRktContainers(events)
return nil
}
func (self *rktContainerWatcher) Stop() error {
// Rendezvous with the watcher thread.
self.stopWatcher <- nil
return nil
}
func (self *rktContainerWatcher) detectRktContainers(events chan watcher.ContainerEvent) {
klog.V(1).Infof("Starting detectRktContainers thread")
ticker := time.Tick(10 * time.Second)
curpods := make(map[string]*rktapi.Pod)
for {
select {
case <-ticker:
pods, err := listRunningPods()
if err != nil {
klog.Errorf("detectRktContainers: listRunningPods failed: %v", err)
continue
}
curpods = self.syncRunningPods(pods, events, curpods)
case <-self.stopWatcher:
klog.Infof("Exiting rktContainer Thread")
return
}
}
}
func (self *rktContainerWatcher) syncRunningPods(pods []*rktapi.Pod, events chan watcher.ContainerEvent, curpods map[string]*rktapi.Pod) map[string]*rktapi.Pod {
newpods := make(map[string]*rktapi.Pod)
for _, pod := range pods {
newpods[pod.Id] = pod
// if pods become mutable, have to handle this better
if _, ok := curpods[pod.Id]; !ok {
// should create all cgroups not including system.slice
// i.e. /system.slice/rkt-test.service and /system.slice/rkt-test.service/system.slice/pause.service
for _, cgroup := range podToCgroup(pod) {
self.sendUpdateEvent(cgroup, events)
}
}
}
for id, pod := range curpods {
if _, ok := newpods[id]; !ok {
for _, cgroup := range podToCgroup(pod) {
klog.V(2).Infof("cgroup to delete = %v", cgroup)
self.sendDestroyEvent(cgroup, events)
}
}
}
return newpods
}
func (self *rktContainerWatcher) sendUpdateEvent(cgroup string, events chan watcher.ContainerEvent) {
events <- watcher.ContainerEvent{
EventType: watcher.ContainerAdd,
Name: cgroup,
WatchSource: watcher.Rkt,
}
}
func (self *rktContainerWatcher) sendDestroyEvent(cgroup string, events chan watcher.ContainerEvent) {
events <- watcher.ContainerEvent{
EventType: watcher.ContainerDelete,
Name: cgroup,
WatchSource: watcher.Rkt,
}
}
func listRunningPods() ([]*rktapi.Pod, error) {
client, err := Client()
if err != nil {
return nil, err
}
resp, err := client.ListPods(context.Background(), &rktapi.ListPodsRequest{
// Specify the request: Fetch and print only running pods and their details.
Detail: true,
Filters: []*rktapi.PodFilter{
{
States: []rktapi.PodState{rktapi.PodState_POD_STATE_RUNNING},
},
},
})
if err != nil {
return nil, err
}
return resp.Pods, nil
}
func podToCgroup(pod *rktapi.Pod) []string {
cgroups := make([]string, 1+len(pod.Apps), 1+len(pod.Apps))
baseCgroup := pod.Cgroup
cgroups[0] = baseCgroup
for i, app := range pod.Apps {
cgroups[i+1] = filepath.Join(baseCgroup, "system.slice", app.Name+".service")
}
return cgroups
}

16
fs/fs.go
View File

@ -41,7 +41,6 @@ import (
const (
LabelSystemRoot = "root"
LabelDockerImages = "docker-images"
LabelRktImages = "rkt-images"
LabelCrioImages = "crio-images"
)
@ -118,7 +117,6 @@ func NewFsInfo(context Context) (FsInfo, error) {
fsInfo.mounts[mount.Mountpoint] = mount
}
fsInfo.addRktImagesLabel(context, mounts)
// need to call this before the log line below printing out the partitions, as this function may
// add a "partition" for devicemapper to fsInfo.partitions
fsInfo.addDockerImagesLabel(context, mounts)
@ -296,20 +294,6 @@ func (self *RealFsInfo) addCrioImagesLabel(context Context, mounts []*mount.Info
}
}
func (self *RealFsInfo) addRktImagesLabel(context Context, mounts []*mount.Info) {
if context.RktPath != "" {
rktPath := context.RktPath
rktImagesPaths := map[string]struct{}{
"/": {},
}
for rktPath != "/" && rktPath != "." {
rktImagesPaths[rktPath] = struct{}{}
rktPath = filepath.Dir(rktPath)
}
self.updateContainerImagesPath(LabelRktImages, mounts, rktImagesPaths)
}
}
// Generate a list of possible mount points for docker image management from the docker root directory.
// Right now, we look for each type of supported graph driver directories, but we can do better by parsing
// some of the context from `docker info`.

5
fs/types.go
View File

@ -20,9 +20,8 @@ import (
type Context struct {
// docker root directory.
Docker DockerContext
RktPath string
Crio CrioContext
Docker DockerContext
Crio CrioContext
}
type DockerContext struct {

3
manager/manager.go
View File

@ -1121,9 +1121,6 @@ func (self *manager) watchForNewContainers(quit chan error) error {
switch {
case event.EventType == watcher.ContainerAdd:
switch event.WatchSource {
// the Rkt and Raw watchers can race, and if Raw wins, we want Rkt to override and create a new handler for Rkt containers
case watcher.Rkt:
err = self.overrideContainer(event.Name, event.WatchSource)
default:
err = self.createContainer(event.Name, event.WatchSource)
}

201
vendor/github.com/coreos/rkt/LICENSE generated vendored
View File

@ -1,201 +0,0 @@
Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
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"You" (or "Your") shall mean an individual or Legal Entity
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Unless required by applicable law or agreed to in writing, software
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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.

21
vendor/github.com/coreos/rkt/api/v1alpha/README.md generated vendored
View File

@ -1,21 +0,0 @@
# WARNING
The API defined here is proposed, experimental, and (for now) subject to change at any time.
If you think you want to use it, or for any other queries, contact <rkt-dev@googlegroups.com> or file an [issue](https://github.com/coreos/rkt/issues/new)
For more information, see:
- #1208
- #1359
- #1468
- [API Service Subcommand](../../Documentation/subcommands/api-service.md)
## Protobuf
The rkt gRPC API uses Protocol Buffers for its services.
In order to rebuild the generated code make sure you have protobuf 3.0.0 installed (https://github.com/google/protobuf)
and execute from the top-level directory:
```
$ make protobuf
```

1775
vendor/github.com/coreos/rkt/api/v1alpha/api.pb.go generated vendored
View File

File diff suppressed because it is too large Load Diff

487
vendor/github.com/coreos/rkt/api/v1alpha/api.proto generated vendored
View File

@ -1,487 +0,0 @@
// Copyright 2015 The rkt Authors
//
// 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.
// *************************************************** //
// ************ WARNING - HERE BE DRAGONS ************ //
// //
// The API defined here is proposed, experimental, //
// and (for now) subject to change at any time. //
// //
// If you think you want to use it, or for any other //
// queries, contact <rkt-dev@googlegroups.com> //
// or file an issue on github.com/coreos/rkt //
// //
// *************************************************** //
// ****************** END WARNING ******************** //
syntax = "proto3";
package v1alpha;
// ImageType defines the supported image type.
enum ImageType {
IMAGE_TYPE_UNDEFINED = 0;
IMAGE_TYPE_APPC = 1;
IMAGE_TYPE_DOCKER = 2;
IMAGE_TYPE_OCI = 3;
}
// ImageFormat defines the format of the image.
message ImageFormat {
// Type of the image, required.
ImageType type = 1;
// Version of the image format, required.
string version = 2;
}
// Image describes the image's information.
message Image {
// Base format of the image, required. This indicates the original format
// for the image as nowadays all the image formats will be transformed to
// ACI.
ImageFormat base_format = 1;
// ID of the image, a string that can be used to uniquely identify the image,
// e.g. sha512 hash of the ACIs, required.
string id = 2;
// Name of the image in the image manifest, e.g. 'coreos.com/etcd', optional.
string name = 3;
// Version of the image, e.g. 'latest', '2.0.10', optional.
string version = 4;
// Timestamp of when the image is imported, it is the seconds since epoch, optional.
int64 import_timestamp = 5;
// JSON-encoded byte array that represents the image manifest, optional.
bytes manifest = 6;
// Size is the size in bytes of this image in the store.
int64 size = 7;
// Annotations on this image.
repeated KeyValue annotations = 8;
// Labels of this image.
repeated KeyValue labels = 9;
}
// Network describes the network information of a pod.
message Network {
// Name of the network that a pod belongs to, required.
string name = 1;
// Pod's IPv4 address within the network, optional if IPv6 address is given.
string ipv4 = 2;
// Pod's IPv6 address within the network, optional if IPv4 address is given.
string ipv6 = 3;
}
// AppState defines the possible states of the app.
enum AppState {
APP_STATE_UNDEFINED = 0;
APP_STATE_RUNNING = 1;
APP_STATE_EXITED = 2;
}
// App describes the information of an app that's running in a pod.
message App {
// Name of the app, required.
string name = 1;
// Image used by the app, required. However, this may only contain the image id
// if it is returned by ListPods().
Image image = 2;
// State of the app. optional, non-empty only if it's returned by InspectPod().
AppState state = 3;
// Exit code of the app. optional, only valid if it's returned by InspectPod() and
// the app has already exited.
sint32 exit_code = 4;
// Annotations for this app.
repeated KeyValue annotations = 5;
}
// PodState defines the possible states of the pod.
// See https://github.com/coreos/rkt/blob/master/Documentation/devel/pod-lifecycle.md for a detailed
// explanation of each state.
enum PodState {
POD_STATE_UNDEFINED = 0;
// States before the pod is running.
POD_STATE_EMBRYO = 1; // Pod is created, ready to entering 'preparing' state.
POD_STATE_PREPARING = 2; // Pod is being prepared. On success it will become 'prepared', otherwise it will become 'aborted prepared'.
POD_STATE_PREPARED = 3; // Pod has been successfully prepared, ready to enter 'running' state. it can also enter 'deleting' if it's garbage collected before running.
// State that indicates the pod is running.
POD_STATE_RUNNING = 4; // Pod is running, when it exits, it will become 'exited'.
// States that indicates the pod is exited, and will never run.
POD_STATE_ABORTED_PREPARE = 5; // Pod failed to prepare, it will only be garbage collected and will never run again.
POD_STATE_EXITED = 6; // Pod has exited, it now can be garbage collected.
POD_STATE_DELETING = 7; // Pod is being garbage collected, after that it will enter 'garbage' state.
POD_STATE_GARBAGE = 8; // Pod is marked as garbage collected, it no longer exists on the machine.
}
// Pod describes a pod's information.
// If a pod is in Embryo, Preparing, AbortedPrepare state,
// only id and state will be returned.
//
// If a pod is in other states, the pod manifest and
// apps will be returned when 'detailed' is true in the request.
//
// A valid pid of the stage1 process of the pod will be returned
// if the pod is Running has run once.
//
// Networks are only returned when a pod is in Running.
message Pod {
// ID of the pod, in the form of a UUID.
string id = 1;
// PID of the stage1 process of the pod.
sint32 pid = 2;
// State of the pod.
PodState state = 3;
// List of apps in the pod.
repeated App apps = 4;
// Network information of the pod.
// Note that a pod can be in multiple networks.
repeated Network networks = 5;
// JSON-encoded byte array that represents the pod manifest of the pod.
bytes manifest = 6;
// Annotations on this pod.
repeated KeyValue annotations = 7;
// Cgroup of the pod, empty if the pod is not running.
string cgroup = 8;
// Timestamp of when the pod is created, nanoseconds since epoch.
// Zero if the pod is not created.
int64 created_at = 9;
// Timestamp of when the pod is started, nanoseconds since epoch.
// Zero if the pod is not started.
int64 started_at = 10;
// Timestamp of when the pod is moved to exited-garbage/garbage,
// in nanoseconds since epoch.
// Zero if the pod is not moved to exited-garbage/garbage yet.
int64 gc_marked_at = 11;
}
message KeyValue {
// Key part of the key-value pair.
string Key = 1;
// Value part of the key-value pair.
string value = 2;
}
// PodFilter defines the condition that the returned pods need to satisfy in ListPods().
// The conditions are combined by 'AND', and different filters are combined by 'OR'.
message PodFilter {
// If not empty, the pods that have any of the ids will be returned.
repeated string ids = 1;
// If not empty, the pods that have any of the states will be returned.
repeated PodState states = 2;
// If not empty, the pods that all of the apps will be returned.
repeated string app_names = 3;
// If not empty, the pods that have all of the images(in the apps) will be returned
repeated string image_ids = 4;
// If not empty, the pods that are in all of the networks will be returned.
repeated string network_names = 5;
// If not empty, the pods that have all of the annotations will be returned.
repeated KeyValue annotations = 6;
// If not empty, the pods whose cgroup are listed will be returned.
repeated string cgroups = 7;
// If not empty, the pods whose these cgroup belong to will be returned.
// i.e. the pod's cgroup is a prefix of the specified cgroup
repeated string pod_sub_cgroups = 8;
}
// ImageFilter defines the condition that the returned images need to satisfy in ListImages().
// The conditions are combined by 'AND', and different filters are combined by 'OR'.
message ImageFilter {
// If not empty, the images that have any of the ids will be returned.
repeated string ids = 1;
// if not empty, the images that have any of the prefixes in the name will be returned.
repeated string prefixes = 2;
// If not empty, the images that have any of the base names will be returned.
// For example, both 'coreos.com/etcd' and 'k8s.io/etcd' will be returned if 'etcd' is included,
// however 'k8s.io/etcd-backup' will not be returned.
repeated string base_names = 3;
// If not empty, the images that have any of the keywords in the name will be returned.
// For example, both 'kubernetes-etcd', 'etcd:latest' will be returned if 'etcd' is included,
repeated string keywords = 4;
// If not empty, the images that have all of the labels will be returned.
repeated KeyValue labels = 5;
// If set, the images that are imported after this timestamp will be returned.
int64 imported_after = 6;
// If set, the images that are imported before this timestamp will be returned.
int64 imported_before = 7;
// If not empty, the images that have all of the annotations will be returned.
repeated KeyValue annotations = 8;
// If not empty, the images that have any of the exact full names will be returned.
repeated string full_names = 9;
}
// GlobalFlags describes the flags that passed to rkt api service when it is launched.
message GlobalFlags {
// Data directory.
string dir = 1;
// System configuration directory.
string system_config_dir = 2;
// Local configuration directory.
string local_config_dir = 3;
// User configuration directory.
string user_config_dir = 4;
// Insecure flags configurates what security features to disable.
string insecure_flags = 5;
// Whether to automatically trust gpg keys fetched from https
bool trust_keys_from_https = 6;
}
// Info describes the information of rkt on the machine.
message Info {
// Version of rkt, required, in the form of Semantic Versioning 2.0.0 (http://semver.org/).
string rkt_version = 1;
// Version of appc, required, in the form of Semantic Versioning 2.0.0 (http://semver.org/).
string appc_version = 2;
// Latest version of the api that's supported by the service, required, in the form of Semantic Versioning 2.0.0 (http://semver.org/).
string api_version = 3;
// The global flags that passed to the rkt api service when it's launched.
GlobalFlags global_flags = 4;
}
// EventType defines the type of the events that will be received via ListenEvents().
enum EventType {
EVENT_TYPE_UNDEFINED = 0;
// Pod events.
EVENT_TYPE_POD_PREPARED = 1;
EVENT_TYPE_POD_PREPARE_ABORTED = 2;
EVENT_TYPE_POD_STARTED = 3;
EVENT_TYPE_POD_EXITED = 4;
EVENT_TYPE_POD_GARBAGE_COLLECTED = 5;
// App events.
EVENT_TYPE_APP_STARTED = 6;
EVENT_TYPE_APP_EXITED = 7; // (XXX)yifan: Maybe also return exit code in the event object?
// Image events.
EVENT_TYPE_IMAGE_IMPORTED = 8;
EVENT_TYPE_IMAGE_REMOVED = 9;
}
// Event describes the events that will be received via ListenEvents().
message Event {
// Type of the event, required.
EventType type = 1;
// ID of the subject that causes the event, required.
// If the event is a pod or app event, the id is the pod's uuid.
// If the event is an image event, the id is the image's id.
string id = 2;
// Name of the subject that causes the event, required.
// If the event is a pod event, the name is the pod's name.
// If the event is an app event, the name is the app's name.
// If the event is an image event, the name is the image's name.
string from = 3;
// Timestamp of when the event happens, it is the seconds since epoch, required.
int64 time = 4;
// Data of the event, in the form of key-value pairs, optional.
repeated KeyValue data = 5;
}
// EventFilter defines the condition that the returned events needs to satisfy in ListImages().
// The condition are combined by 'AND'.
message EventFilter {
// If not empty, then only returns the events that have the listed types.
repeated EventType types = 1;
// If not empty, then only returns the events whose 'id' is included in the listed ids.
repeated string ids = 2;
// If not empty, then only returns the events whose 'from' is included in the listed names.
repeated string names = 3;
// If set, then only returns the events after this timestamp.
// If the server starts after since_time, then only the events happened after the start of the server will be returned.
// If since_time is a future timestamp, then no events will be returned until that time.
int64 since_time = 4;
// If set, then only returns the events before this timestamp.
// If it is a future timestamp, then the event stream will be closed at that moment.
int64 until_time = 5;
}
// Request for GetInfo().
message GetInfoRequest {}
// Response for GetInfo().
message GetInfoResponse {
Info info = 1; // Required.
}
// Request for ListPods().
message ListPodsRequest {
repeated PodFilter filters = 1; // Optional.
bool detail = 2; // Optional.
}
// Response for ListPods().
message ListPodsResponse {
repeated Pod pods = 1; // Required.
}
// Request for InspectPod().
message InspectPodRequest {
// ID of the pod which we are querying status for, required.
string id = 1;
}
// Response for InspectPod().
message InspectPodResponse {
Pod pod = 1; // Required.
}
// Request for ListImages().
message ListImagesRequest {
repeated ImageFilter filters = 1; // Optional.
bool detail = 2; // Optional.
}
// Response for ListImages().
message ListImagesResponse {
repeated Image images = 1; // Required.
}
// Request for InspectImage().
message InspectImageRequest {
string id = 1; // Required.
}
// Response for InspectImage().
message InspectImageResponse {
Image image = 1; // Required.
}
// Request for ListenEvents().
message ListenEventsRequest {
EventFilter filter = 1; // Optional.
}
// Response for ListenEvents().
message ListenEventsResponse {
// Aggregate multiple events to reduce round trips, optional as the response can contain no events.
repeated Event events = 1;
}
// Request for GetLogs().
message GetLogsRequest {
// ID of the pod which we will get logs from, required.
string pod_id = 1;
// Name of the app within the pod which we will get logs
// from, optional. If not set, then the logs of all the
// apps within the pod will be returned.
string app_name = 2;
// Number of most recent lines to return, optional.
int32 lines = 3;
// If true, then a response stream will not be closed,
// and new log response will be sent via the stream, default is false.
bool follow = 4;
// If set, then only the logs after the timestamp will
// be returned, optional.
int64 since_time = 5;
// If set, then only the logs before the timestamp will
// be returned, optional.
int64 until_time = 6;
}
// Response for GetLogs().
message GetLogsResponse {
// List of the log lines that returned, optional as the response can contain no logs.
repeated string lines = 1;
}
// PublicAPI defines the read-only APIs that will be supported.
// These will be handled over TCP sockets.
service PublicAPI {
// GetInfo gets the rkt's information on the machine.
rpc GetInfo (GetInfoRequest) returns (GetInfoResponse) {}
// ListPods lists rkt pods on the machine.
rpc ListPods (ListPodsRequest) returns (ListPodsResponse) {}
// InspectPod gets detailed pod information of the specified pod.
rpc InspectPod (InspectPodRequest) returns (InspectPodResponse) {}
// ListImages lists the images on the machine.
rpc ListImages (ListImagesRequest) returns (ListImagesResponse) {}
// InspectImage gets the detailed image information of the specified image.
rpc InspectImage (InspectImageRequest) returns (InspectImageResponse) {}
// ListenEvents listens for the events, it will return a response stream
// that will contain event objects.
rpc ListenEvents (ListenEventsRequest) returns (stream ListenEventsResponse) {}
// GetLogs gets the logs for a pod, if the app is also specified, then only the logs
// of the app will be returned.
//
// If 'follow' in the 'GetLogsRequest' is set to 'true', then the response stream
// will not be closed after the first response, the future logs will be sent via
// the stream.
rpc GetLogs(GetLogsRequest) returns (stream GetLogsResponse) {}
}

154
vendor/github.com/coreos/rkt/api/v1alpha/client_example.go generated vendored
View File

@ -1,154 +0,0 @@
// Copyright 2015 The rkt Authors
//
// 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.
// +build ignore
package main
import (
"flag"
"fmt"
"io"
"os"
"time"
"github.com/coreos/rkt/api/v1alpha"
"golang.org/x/net/context"
"google.golang.org/grpc"
)
func getLogsWithoutFollow(c v1alpha.PublicAPIClient, p *v1alpha.Pod) {
if len(p.Apps) == 0 {
fmt.Printf("Pod %q has no apps\n", p.Id)
return
}
logsResp, err := c.GetLogs(context.Background(), &v1alpha.GetLogsRequest{
PodId: p.Id,
Follow: false,
AppName: p.Apps[0].Name,
SinceTime: time.Now().Add(-time.Second * 5).Unix(),
Lines: 10,
})
if err != nil {
fmt.Println(err)
os.Exit(254)
}
logsRecvResp, err := logsResp.Recv()
if err == io.EOF {
return
}
if err != nil {
fmt.Println(err)
return
}
for _, l := range logsRecvResp.Lines {
fmt.Println(l)
}
}
func getLogsWithFollow(c v1alpha.PublicAPIClient, p *v1alpha.Pod) {
if len(p.Apps) == 0 {
fmt.Printf("Pod %q has no apps\n", p.Id)
return
}
logsResp, err := c.GetLogs(context.Background(), &v1alpha.GetLogsRequest{
PodId: p.Id,
Follow: true,
AppName: p.Apps[0].Name,
})
if err != nil {
fmt.Println(err)
os.Exit(254)
}
for {
logsRecvResp, err := logsResp.Recv()
if err == io.EOF {
return
}
if err != nil {
fmt.Println(err)
return
}
for _, l := range logsRecvResp.Lines {
fmt.Println(l)
}
}
}
func main() {
followFlag := flag.Bool("follow", false, "enable 'follow' option on GetLogs")
flag.Parse()
conn, err := grpc.Dial("localhost:15441", grpc.WithInsecure())
if err != nil {
fmt.Println(err)
os.Exit(254)
}
c := v1alpha.NewPublicAPIClient(conn)
defer conn.Close()
// List pods.
podResp, err := c.ListPods(context.Background(), &v1alpha.ListPodsRequest{
// Specify the request: Fetch and print only running pods and their details.
Detail: true,
Filters: []*v1alpha.PodFilter{
{
States: []v1alpha.PodState{v1alpha.PodState_POD_STATE_RUNNING},
},
},
})
if err != nil {
fmt.Println(err)
os.Exit(254)
}
for _, p := range podResp.Pods {
if *followFlag {
fmt.Printf("Pod %q is running. Following logs:\n", p.Id)
getLogsWithFollow(c, p)
} else {
fmt.Printf("Pod %q is running.\n", p.Id)
getLogsWithoutFollow(c, p)
}
}
// List images.
imgResp, err := c.ListImages(context.Background(), &v1alpha.ListImagesRequest{
// In this request, we fetch the details of images whose names are prefixed with "coreos.com".
Detail: true,
Filters: []*v1alpha.ImageFilter{
{
Prefixes: []string{"coreos.com"},
},
},
})
if err != nil {
fmt.Println(err)
os.Exit(254)
}
for _, im := range imgResp.Images {
fmt.Printf("Found image %q\n", im.Name)
}
}

1
watcher/watcher.go
View File

@ -28,7 +28,6 @@ type ContainerWatchSource int
const (
Raw ContainerWatchSource = iota
Rkt
)
// ContainerEvent represents a