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vendor update for E2E framework

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Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
This commit is contained in:
Madhu Rajanna
2019-05-31 15:15:11 +05:30
parent 9bb23e4e32
commit d300da19b7
2149 changed files with 598692 additions and 14107 deletions
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199
vendor/k8s.io/kubernetes/pkg/kubelet/container/cache.go generated vendored Normal file
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/*
Copyright 2015 The Kubernetes 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.
*/
package container
import (
"sync"
"time"
"k8s.io/apimachinery/pkg/types"
)
// Cache stores the PodStatus for the pods. It represents *all* the visible
// pods/containers in the container runtime. All cache entries are at least as
// new or newer than the global timestamp (set by UpdateTime()), while
// individual entries may be slightly newer than the global timestamp. If a pod
// has no states known by the runtime, Cache returns an empty PodStatus object
// with ID populated.
//
// Cache provides two methods to retrive the PodStatus: the non-blocking Get()
// and the blocking GetNewerThan() method. The component responsible for
// populating the cache is expected to call Delete() to explicitly free the
// cache entries.
type Cache interface {
Get(types.UID) (*PodStatus, error)
Set(types.UID, *PodStatus, error, time.Time)
// GetNewerThan is a blocking call that only returns the status
// when it is newer than the given time.
GetNewerThan(types.UID, time.Time) (*PodStatus, error)
Delete(types.UID)
UpdateTime(time.Time)
}
type data struct {
// Status of the pod.
status *PodStatus
// Error got when trying to inspect the pod.
err error
// Time when the data was last modified.
modified time.Time
}
type subRecord struct {
time time.Time
ch chan *data
}
// cache implements Cache.
type cache struct {
// Lock which guards all internal data structures.
lock sync.RWMutex
// Map that stores the pod statuses.
pods map[types.UID]*data
// A global timestamp represents how fresh the cached data is. All
// cache content is at the least newer than this timestamp. Note that the
// timestamp is nil after initialization, and will only become non-nil when
// it is ready to serve the cached statuses.
timestamp *time.Time
// Map that stores the subscriber records.
subscribers map[types.UID][]*subRecord
}
// NewCache creates a pod cache.
func NewCache() Cache {
return &cache{pods: map[types.UID]*data{}, subscribers: map[types.UID][]*subRecord{}}
}
// Get returns the PodStatus for the pod; callers are expected not to
// modify the objects returned.
func (c *cache) Get(id types.UID) (*PodStatus, error) {
c.lock.RLock()
defer c.lock.RUnlock()
d := c.get(id)
return d.status, d.err
}
func (c *cache) GetNewerThan(id types.UID, minTime time.Time) (*PodStatus, error) {
ch := c.subscribe(id, minTime)
d := <-ch
return d.status, d.err
}
// Set sets the PodStatus for the pod.
func (c *cache) Set(id types.UID, status *PodStatus, err error, timestamp time.Time) {
c.lock.Lock()
defer c.lock.Unlock()
defer c.notify(id, timestamp)
c.pods[id] = &data{status: status, err: err, modified: timestamp}
}
// Delete removes the entry of the pod.
func (c *cache) Delete(id types.UID) {
c.lock.Lock()
defer c.lock.Unlock()
delete(c.pods, id)
}
// UpdateTime modifies the global timestamp of the cache and notify
// subscribers if needed.
func (c *cache) UpdateTime(timestamp time.Time) {
c.lock.Lock()
defer c.lock.Unlock()
c.timestamp = &timestamp
// Notify all the subscribers if the condition is met.
for id := range c.subscribers {
c.notify(id, *c.timestamp)
}
}
func makeDefaultData(id types.UID) *data {
return &data{status: &PodStatus{ID: id}, err: nil}
}
func (c *cache) get(id types.UID) *data {
d, ok := c.pods[id]
if !ok {
// Cache should store *all* pod/container information known by the
// container runtime. A cache miss indicates that there are no states
// regarding the pod last time we queried the container runtime.
// What this *really* means is that there are no visible pod/containers
// associated with this pod. Simply return an default (mostly empty)
// PodStatus to reflect this.
return makeDefaultData(id)
}
return d
}
// getIfNewerThan returns the data it is newer than the given time.
// Otherwise, it returns nil. The caller should acquire the lock.
func (c *cache) getIfNewerThan(id types.UID, minTime time.Time) *data {
d, ok := c.pods[id]
globalTimestampIsNewer := (c.timestamp != nil && c.timestamp.After(minTime))
if !ok && globalTimestampIsNewer {
// Status is not cached, but the global timestamp is newer than
// minTime, return the default status.
return makeDefaultData(id)
}
if ok && (d.modified.After(minTime) || globalTimestampIsNewer) {
// Status is cached, return status if either of the following is true.
// * status was modified after minTime
// * the global timestamp of the cache is newer than minTime.
return d
}
// The pod status is not ready.
return nil
}
// notify sends notifications for pod with the given id, if the requirements
// are met. Note that the caller should acquire the lock.
func (c *cache) notify(id types.UID, timestamp time.Time) {
list, ok := c.subscribers[id]
if !ok {
// No one to notify.
return
}
newList := []*subRecord{}
for i, r := range list {
if timestamp.Before(r.time) {
// Doesn't meet the time requirement; keep the record.
newList = append(newList, list[i])
continue
}
r.ch <- c.get(id)
close(r.ch)
}
if len(newList) == 0 {
delete(c.subscribers, id)
} else {
c.subscribers[id] = newList
}
}
func (c *cache) subscribe(id types.UID, timestamp time.Time) chan *data {
ch := make(chan *data, 1)
c.lock.Lock()
defer c.lock.Unlock()
d := c.getIfNewerThan(id, timestamp)
if d != nil {
// If the cache entry is ready, send the data and return immediately.
ch <- d
return ch
}
// Add the subscription record.
c.subscribers[id] = append(c.subscribers[id], &subRecord{time: timestamp, ch: ch})
return ch
}

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vendor/k8s.io/kubernetes/pkg/kubelet/container/container_gc.go generated vendored Normal file
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/*
Copyright 2014 The Kubernetes 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.
*/
package container
import (
"fmt"
"time"
"k8s.io/klog"
)
// Specified a policy for garbage collecting containers.
type ContainerGCPolicy struct {
// Minimum age at which a container can be garbage collected, zero for no limit.
MinAge time.Duration
// Max number of dead containers any single pod (UID, container name) pair is
// allowed to have, less than zero for no limit.
MaxPerPodContainer int
// Max number of total dead containers, less than zero for no limit.
MaxContainers int
}
// Manages garbage collection of dead containers.
//
// Implementation is thread-compatible.
type ContainerGC interface {
// Garbage collect containers.
GarbageCollect() error
// Deletes all unused containers, including containers belonging to pods that are terminated but not deleted
DeleteAllUnusedContainers() error
}
// SourcesReadyProvider knows how to determine if configuration sources are ready
type SourcesReadyProvider interface {
// AllReady returns true if the currently configured sources have all been seen.
AllReady() bool
}
// TODO(vmarmol): Preferentially remove pod infra containers.
type realContainerGC struct {
// Container runtime
runtime Runtime
// Policy for garbage collection.
policy ContainerGCPolicy
// sourcesReadyProvider provides the readiness of kubelet configuration sources.
sourcesReadyProvider SourcesReadyProvider
}
// New ContainerGC instance with the specified policy.
func NewContainerGC(runtime Runtime, policy ContainerGCPolicy, sourcesReadyProvider SourcesReadyProvider) (ContainerGC, error) {
if policy.MinAge < 0 {
return nil, fmt.Errorf("invalid minimum garbage collection age: %v", policy.MinAge)
}
return &realContainerGC{
runtime: runtime,
policy: policy,
sourcesReadyProvider: sourcesReadyProvider,
}, nil
}
func (cgc *realContainerGC) GarbageCollect() error {
return cgc.runtime.GarbageCollect(cgc.policy, cgc.sourcesReadyProvider.AllReady(), false)
}
func (cgc *realContainerGC) DeleteAllUnusedContainers() error {
klog.Infof("attempting to delete unused containers")
return cgc.runtime.GarbageCollect(cgc.policy, cgc.sourcesReadyProvider.AllReady(), true)
}

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vendor/k8s.io/kubernetes/pkg/kubelet/container/container_reference_manager.go generated vendored Normal file
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/*
Copyright 2015 The Kubernetes 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.
*/
package container
import (
"sync"
"k8s.io/api/core/v1"
)
// RefManager manages the references for the containers.
// The references are used for reporting events such as creation,
// failure, etc. This manager is thread-safe, no locks are necessary
// for the caller.
type RefManager struct {
sync.RWMutex
containerIDToRef map[ContainerID]*v1.ObjectReference
}
// NewRefManager creates and returns a container reference manager
// with empty contents.
func NewRefManager() *RefManager {
return &RefManager{containerIDToRef: make(map[ContainerID]*v1.ObjectReference)}
}
// SetRef stores a reference to a pod's container, associating it with the given container ID.
func (c *RefManager) SetRef(id ContainerID, ref *v1.ObjectReference) {
c.Lock()
defer c.Unlock()
c.containerIDToRef[id] = ref
}
// ClearRef forgets the given container id and its associated container reference.
func (c *RefManager) ClearRef(id ContainerID) {
c.Lock()
defer c.Unlock()
delete(c.containerIDToRef, id)
}
// GetRef returns the container reference of the given ID, or (nil, false) if none is stored.
func (c *RefManager) GetRef(id ContainerID) (ref *v1.ObjectReference, ok bool) {
c.RLock()
defer c.RUnlock()
ref, ok = c.containerIDToRef[id]
return ref, ok
}

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vendor/k8s.io/kubernetes/pkg/kubelet/container/helpers.go generated vendored Normal file
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/*
Copyright 2015 The Kubernetes 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.
*/
package container
import (
"fmt"
"hash/fnv"
"strings"
"k8s.io/klog"
"k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/types"
"k8s.io/apimachinery/pkg/util/sets"
"k8s.io/client-go/tools/record"
runtimeapi "k8s.io/kubernetes/pkg/kubelet/apis/cri/runtime/v1alpha2"
"k8s.io/kubernetes/pkg/kubelet/util/format"
hashutil "k8s.io/kubernetes/pkg/util/hash"
"k8s.io/kubernetes/third_party/forked/golang/expansion"
)
// HandlerRunner runs a lifecycle handler for a container.
type HandlerRunner interface {
Run(containerID ContainerID, pod *v1.Pod, container *v1.Container, handler *v1.Handler) (string, error)
}
// RuntimeHelper wraps kubelet to make container runtime
// able to get necessary informations like the RunContainerOptions, DNS settings, Host IP.
type RuntimeHelper interface {
GenerateRunContainerOptions(pod *v1.Pod, container *v1.Container, podIP string) (contOpts *RunContainerOptions, cleanupAction func(), err error)
GetPodDNS(pod *v1.Pod) (dnsConfig *runtimeapi.DNSConfig, err error)
// GetPodCgroupParent returns the CgroupName identifier, and its literal cgroupfs form on the host
// of a pod.
GetPodCgroupParent(pod *v1.Pod) string
GetPodDir(podUID types.UID) string
GeneratePodHostNameAndDomain(pod *v1.Pod) (hostname string, hostDomain string, err error)
// GetExtraSupplementalGroupsForPod returns a list of the extra
// supplemental groups for the Pod. These extra supplemental groups come
// from annotations on persistent volumes that the pod depends on.
GetExtraSupplementalGroupsForPod(pod *v1.Pod) []int64
}
// ShouldContainerBeRestarted checks whether a container needs to be restarted.
// TODO(yifan): Think about how to refactor this.
func ShouldContainerBeRestarted(container *v1.Container, pod *v1.Pod, podStatus *PodStatus) bool {
// Get latest container status.
status := podStatus.FindContainerStatusByName(container.Name)
// If the container was never started before, we should start it.
// NOTE(random-liu): If all historical containers were GC'd, we'll also return true here.
if status == nil {
return true
}
// Check whether container is running
if status.State == ContainerStateRunning {
return false
}
// Always restart container in the unknown, or in the created state.
if status.State == ContainerStateUnknown || status.State == ContainerStateCreated {
return true
}
// Check RestartPolicy for dead container
if pod.Spec.RestartPolicy == v1.RestartPolicyNever {
klog.V(4).Infof("Already ran container %q of pod %q, do nothing", container.Name, format.Pod(pod))
return false
}
if pod.Spec.RestartPolicy == v1.RestartPolicyOnFailure {
// Check the exit code.
if status.ExitCode == 0 {
klog.V(4).Infof("Already successfully ran container %q of pod %q, do nothing", container.Name, format.Pod(pod))
return false
}
}
return true
}
// HashContainer returns the hash of the container. It is used to compare
// the running container with its desired spec.
func HashContainer(container *v1.Container) uint64 {
hash := fnv.New32a()
hashutil.DeepHashObject(hash, *container)
return uint64(hash.Sum32())
}
// EnvVarsToMap constructs a map of environment name to value from a slice
// of env vars.
func EnvVarsToMap(envs []EnvVar) map[string]string {
result := map[string]string{}
for _, env := range envs {
result[env.Name] = env.Value
}
return result
}
// V1EnvVarsToMap constructs a map of environment name to value from a slice
// of env vars.
func V1EnvVarsToMap(envs []v1.EnvVar) map[string]string {
result := map[string]string{}
for _, env := range envs {
result[env.Name] = env.Value
}
return result
}
// ExpandContainerCommandOnlyStatic substitutes only static environment variable values from the
// container environment definitions. This does *not* include valueFrom substitutions.
// TODO: callers should use ExpandContainerCommandAndArgs with a fully resolved list of environment.
func ExpandContainerCommandOnlyStatic(containerCommand []string, envs []v1.EnvVar) (command []string) {
mapping := expansion.MappingFuncFor(V1EnvVarsToMap(envs))
if len(containerCommand) != 0 {
for _, cmd := range containerCommand {
command = append(command, expansion.Expand(cmd, mapping))
}
}
return command
}
func ExpandContainerVolumeMounts(mount v1.VolumeMount, envs []EnvVar) (string, error) {
envmap := EnvVarsToMap(envs)
missingKeys := sets.NewString()
expanded := expansion.Expand(mount.SubPathExpr, func(key string) string {
value, ok := envmap[key]
if !ok || len(value) == 0 {
missingKeys.Insert(key)
}
return value
})
if len(missingKeys) > 0 {
return "", fmt.Errorf("missing value for %s", strings.Join(missingKeys.List(), ", "))
}
return expanded, nil
}
func ExpandContainerCommandAndArgs(container *v1.Container, envs []EnvVar) (command []string, args []string) {
mapping := expansion.MappingFuncFor(EnvVarsToMap(envs))
if len(container.Command) != 0 {
for _, cmd := range container.Command {
command = append(command, expansion.Expand(cmd, mapping))
}
}
if len(container.Args) != 0 {
for _, arg := range container.Args {
args = append(args, expansion.Expand(arg, mapping))
}
}
return command, args
}
// Create an event recorder to record object's event except implicitly required container's, like infra container.
func FilterEventRecorder(recorder record.EventRecorder) record.EventRecorder {
return &innerEventRecorder{
recorder: recorder,
}
}
type innerEventRecorder struct {
recorder record.EventRecorder
}
func (irecorder *innerEventRecorder) shouldRecordEvent(object runtime.Object) (*v1.ObjectReference, bool) {
if object == nil {
return nil, false
}
if ref, ok := object.(*v1.ObjectReference); ok {
if !strings.HasPrefix(ref.FieldPath, ImplicitContainerPrefix) {
return ref, true
}
}
return nil, false
}
func (irecorder *innerEventRecorder) Event(object runtime.Object, eventtype, reason, message string) {
if ref, ok := irecorder.shouldRecordEvent(object); ok {
irecorder.recorder.Event(ref, eventtype, reason, message)
}
}
func (irecorder *innerEventRecorder) Eventf(object runtime.Object, eventtype, reason, messageFmt string, args ...interface{}) {
if ref, ok := irecorder.shouldRecordEvent(object); ok {
irecorder.recorder.Eventf(ref, eventtype, reason, messageFmt, args...)
}
}
func (irecorder *innerEventRecorder) PastEventf(object runtime.Object, timestamp metav1.Time, eventtype, reason, messageFmt string, args ...interface{}) {
if ref, ok := irecorder.shouldRecordEvent(object); ok {
irecorder.recorder.PastEventf(ref, timestamp, eventtype, reason, messageFmt, args...)
}
}
func (irecorder *innerEventRecorder) AnnotatedEventf(object runtime.Object, annotations map[string]string, eventtype, reason, messageFmt string, args ...interface{}) {
if ref, ok := irecorder.shouldRecordEvent(object); ok {
irecorder.recorder.AnnotatedEventf(ref, annotations, eventtype, reason, messageFmt, args...)
}
}
// Pod must not be nil.
func IsHostNetworkPod(pod *v1.Pod) bool {
return pod.Spec.HostNetwork
}
// TODO(random-liu): Convert PodStatus to running Pod, should be deprecated soon
func ConvertPodStatusToRunningPod(runtimeName string, podStatus *PodStatus) Pod {
runningPod := Pod{
ID: podStatus.ID,
Name: podStatus.Name,
Namespace: podStatus.Namespace,
}
for _, containerStatus := range podStatus.ContainerStatuses {
if containerStatus.State != ContainerStateRunning {
continue
}
container := &Container{
ID: containerStatus.ID,
Name: containerStatus.Name,
Image: containerStatus.Image,
ImageID: containerStatus.ImageID,
Hash: containerStatus.Hash,
State: containerStatus.State,
}
runningPod.Containers = append(runningPod.Containers, container)
}
// Populate sandboxes in kubecontainer.Pod
for _, sandbox := range podStatus.SandboxStatuses {
runningPod.Sandboxes = append(runningPod.Sandboxes, &Container{
ID: ContainerID{Type: runtimeName, ID: sandbox.Id},
State: SandboxToContainerState(sandbox.State),
})
}
return runningPod
}
// SandboxToContainerState converts runtimeapi.PodSandboxState to
// kubecontainer.ContainerState.
// This is only needed because we need to return sandboxes as if they were
// kubecontainer.Containers to avoid substantial changes to PLEG.
// TODO: Remove this once it becomes obsolete.
func SandboxToContainerState(state runtimeapi.PodSandboxState) ContainerState {
switch state {
case runtimeapi.PodSandboxState_SANDBOX_READY:
return ContainerStateRunning
case runtimeapi.PodSandboxState_SANDBOX_NOTREADY:
return ContainerStateExited
}
return ContainerStateUnknown
}
// FormatPod returns a string representing a pod in a human readable format,
// with pod UID as part of the string.
func FormatPod(pod *Pod) string {
// Use underscore as the delimiter because it is not allowed in pod name
// (DNS subdomain format), while allowed in the container name format.
return fmt.Sprintf("%s_%s(%s)", pod.Name, pod.Namespace, pod.ID)
}
// GetContainerSpec gets the container spec by containerName.
func GetContainerSpec(pod *v1.Pod, containerName string) *v1.Container {
for i, c := range pod.Spec.Containers {
if containerName == c.Name {
return &pod.Spec.Containers[i]
}
}
for i, c := range pod.Spec.InitContainers {
if containerName == c.Name {
return &pod.Spec.InitContainers[i]
}
}
return nil
}
// HasPrivilegedContainer returns true if any of the containers in the pod are privileged.
func HasPrivilegedContainer(pod *v1.Pod) bool {
for _, c := range append(pod.Spec.Containers, pod.Spec.InitContainers...) {
if c.SecurityContext != nil &&
c.SecurityContext.Privileged != nil &&
*c.SecurityContext.Privileged {
return true
}
}
return false
}
// MakePortMappings creates internal port mapping from api port mapping.
func MakePortMappings(container *v1.Container) (ports []PortMapping) {
names := make(map[string]struct{})
for _, p := range container.Ports {
pm := PortMapping{
HostPort: int(p.HostPort),
ContainerPort: int(p.ContainerPort),
Protocol: p.Protocol,
HostIP: p.HostIP,
}
// We need to create some default port name if it's not specified, since
// this is necessary for rkt.
// http://issue.k8s.io/7710
if p.Name == "" {
pm.Name = fmt.Sprintf("%s-%s:%d", container.Name, p.Protocol, p.ContainerPort)
} else {
pm.Name = fmt.Sprintf("%s-%s", container.Name, p.Name)
}
// Protect against exposing the same protocol-port more than once in a container.
if _, ok := names[pm.Name]; ok {
klog.Warningf("Port name conflicted, %q is defined more than once", pm.Name)
continue
}
ports = append(ports, pm)
names[pm.Name] = struct{}{}
}
return
}

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vendor/k8s.io/kubernetes/pkg/kubelet/container/os.go generated vendored Normal file
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/*
Copyright 2015 The Kubernetes 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.
*/
package container
import (
"io/ioutil"
"os"
"path/filepath"
"time"
)
// OSInterface collects system level operations that need to be mocked out
// during tests.
type OSInterface interface {
MkdirAll(path string, perm os.FileMode) error
Symlink(oldname string, newname string) error
Stat(path string) (os.FileInfo, error)
Remove(path string) error
RemoveAll(path string) error
Create(path string) (*os.File, error)
Chmod(path string, perm os.FileMode) error
Hostname() (name string, err error)
Chtimes(path string, atime time.Time, mtime time.Time) error
Pipe() (r *os.File, w *os.File, err error)
ReadDir(dirname string) ([]os.FileInfo, error)
Glob(pattern string) ([]string, error)
}
// RealOS is used to dispatch the real system level operations.
type RealOS struct{}
// MkdirAll will call os.MkdirAll to create a directory.
func (RealOS) MkdirAll(path string, perm os.FileMode) error {
return os.MkdirAll(path, perm)
}
// Symlink will call os.Symlink to create a symbolic link.
func (RealOS) Symlink(oldname string, newname string) error {
return os.Symlink(oldname, newname)
}
// Stat will call os.Stat to get the FileInfo for a given path
func (RealOS) Stat(path string) (os.FileInfo, error) {
return os.Stat(path)
}
// Remove will call os.Remove to remove the path.
func (RealOS) Remove(path string) error {
return os.Remove(path)
}
// RemoveAll will call os.RemoveAll to remove the path and its children.
func (RealOS) RemoveAll(path string) error {
return os.RemoveAll(path)
}
// Create will call os.Create to create and return a file
// at path.
func (RealOS) Create(path string) (*os.File, error) {
return os.Create(path)
}
// Chmod will change the permissions on the specified path or return
// an error.
func (RealOS) Chmod(path string, perm os.FileMode) error {
return os.Chmod(path, perm)
}
// Hostname will call os.Hostname to return the hostname.
func (RealOS) Hostname() (name string, err error) {
return os.Hostname()
}
// Chtimes will call os.Chtimes to change the atime and mtime of the path
func (RealOS) Chtimes(path string, atime time.Time, mtime time.Time) error {
return os.Chtimes(path, atime, mtime)
}
// Pipe will call os.Pipe to return a connected pair of pipe.
func (RealOS) Pipe() (r *os.File, w *os.File, err error) {
return os.Pipe()
}
// ReadDir will call ioutil.ReadDir to return the files under the directory.
func (RealOS) ReadDir(dirname string) ([]os.FileInfo, error) {
return ioutil.ReadDir(dirname)
}
// Glob will call filepath.Glob to return the names of all files matching
// pattern.
func (RealOS) Glob(pattern string) ([]string, error) {
return filepath.Glob(pattern)
}

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/*
Copyright 2015 The Kubernetes 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.
*/
package container
import (
"fmt"
"k8s.io/api/core/v1"
ref "k8s.io/client-go/tools/reference"
"k8s.io/kubernetes/pkg/api/legacyscheme"
)
var ImplicitContainerPrefix string = "implicitly required container "
// GenerateContainerRef returns an *v1.ObjectReference which references the given container
// within the given pod. Returns an error if the reference can't be constructed or the
// container doesn't actually belong to the pod.
//
// This function will return an error if the provided Pod does not have a selfLink,
// but we expect selfLink to be populated at all call sites for the function.
func GenerateContainerRef(pod *v1.Pod, container *v1.Container) (*v1.ObjectReference, error) {
fieldPath, err := fieldPath(pod, container)
if err != nil {
// TODO: figure out intelligent way to refer to containers that we implicitly
// start (like the pod infra container). This is not a good way, ugh.
fieldPath = ImplicitContainerPrefix + container.Name
}
ref, err := ref.GetPartialReference(legacyscheme.Scheme, pod, fieldPath)
if err != nil {
return nil, err
}
return ref, nil
}
// fieldPath returns a fieldPath locating container within pod.
// Returns an error if the container isn't part of the pod.
func fieldPath(pod *v1.Pod, container *v1.Container) (string, error) {
for i := range pod.Spec.Containers {
here := &pod.Spec.Containers[i]
if here.Name == container.Name {
if here.Name == "" {
return fmt.Sprintf("spec.containers[%d]", i), nil
} else {
return fmt.Sprintf("spec.containers{%s}", here.Name), nil
}
}
}
for i := range pod.Spec.InitContainers {
here := &pod.Spec.InitContainers[i]
if here.Name == container.Name {
if here.Name == "" {
return fmt.Sprintf("spec.initContainers[%d]", i), nil
} else {
return fmt.Sprintf("spec.initContainers{%s}", here.Name), nil
}
}
}
return "", fmt.Errorf("container %#v not found in pod %#v", container, pod)
}

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/*
Copyright 2015 The Kubernetes 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.
*/
package container
import (
"k8s.io/apimachinery/pkg/util/runtime"
"k8s.io/client-go/tools/remotecommand"
)
// handleResizing spawns a goroutine that processes the resize channel, calling resizeFunc for each
// remotecommand.TerminalSize received from the channel. The resize channel must be closed elsewhere to stop the
// goroutine.
func HandleResizing(resize <-chan remotecommand.TerminalSize, resizeFunc func(size remotecommand.TerminalSize)) {
if resize == nil {
return
}
go func() {
defer runtime.HandleCrash()
for size := range resize {
if size.Height < 1 || size.Width < 1 {
continue
}
resizeFunc(size)
}
}()
}

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/*
Copyright 2015 The Kubernetes 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.
*/
package container
import (
"context"
"fmt"
"io"
"net/url"
"reflect"
"strings"
"time"
"k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/types"
"k8s.io/client-go/tools/remotecommand"
"k8s.io/client-go/util/flowcontrol"
"k8s.io/klog"
runtimeapi "k8s.io/kubernetes/pkg/kubelet/apis/cri/runtime/v1alpha2"
"k8s.io/kubernetes/pkg/volume"
)
type Version interface {
// Compare compares two versions of the runtime. On success it returns -1
// if the version is less than the other, 1 if it is greater than the other,
// or 0 if they are equal.
Compare(other string) (int, error)
// String returns a string that represents the version.
String() string
}
// ImageSpec is an internal representation of an image. Currently, it wraps the
// value of a Container's Image field, but in the future it will include more detailed
// information about the different image types.
type ImageSpec struct {
Image string
}
// ImageStats contains statistics about all the images currently available.
type ImageStats struct {
// Total amount of storage consumed by existing images.
TotalStorageBytes uint64
}
// Runtime interface defines the interfaces that should be implemented
// by a container runtime.
// Thread safety is required from implementations of this interface.
type Runtime interface {
// Type returns the type of the container runtime.
Type() string
// Version returns the version information of the container runtime.
Version() (Version, error)
// APIVersion returns the cached API version information of the container
// runtime. Implementation is expected to update this cache periodically.
// This may be different from the runtime engine's version.
// TODO(random-liu): We should fold this into Version()
APIVersion() (Version, error)
// Status returns the status of the runtime. An error is returned if the Status
// function itself fails, nil otherwise.
Status() (*RuntimeStatus, error)
// GetPods returns a list of containers grouped by pods. The boolean parameter
// specifies whether the runtime returns all containers including those already
// exited and dead containers (used for garbage collection).
GetPods(all bool) ([]*Pod, error)
// GarbageCollect removes dead containers using the specified container gc policy
// If allSourcesReady is not true, it means that kubelet doesn't have the
// complete list of pods from all avialble sources (e.g., apiserver, http,
// file). In this case, garbage collector should refrain itself from aggressive
// behavior such as removing all containers of unrecognized pods (yet).
// If evictNonDeletedPods is set to true, containers and sandboxes belonging to pods
// that are terminated, but not deleted will be evicted. Otherwise, only deleted pods will be GC'd.
// TODO: Revisit this method and make it cleaner.
GarbageCollect(gcPolicy ContainerGCPolicy, allSourcesReady bool, evictNonDeletedPods bool) error
// Syncs the running pod into the desired pod.
SyncPod(pod *v1.Pod, podStatus *PodStatus, pullSecrets []v1.Secret, backOff *flowcontrol.Backoff) PodSyncResult
// KillPod kills all the containers of a pod. Pod may be nil, running pod must not be.
// TODO(random-liu): Return PodSyncResult in KillPod.
// gracePeriodOverride if specified allows the caller to override the pod default grace period.
// only hard kill paths are allowed to specify a gracePeriodOverride in the kubelet in order to not corrupt user data.
// it is useful when doing SIGKILL for hard eviction scenarios, or max grace period during soft eviction scenarios.
KillPod(pod *v1.Pod, runningPod Pod, gracePeriodOverride *int64) error
// GetPodStatus retrieves the status of the pod, including the
// information of all containers in the pod that are visible in Runtime.
GetPodStatus(uid types.UID, name, namespace string) (*PodStatus, error)
// TODO(vmarmol): Unify pod and containerID args.
// GetContainerLogs returns logs of a specific container. By
// default, it returns a snapshot of the container log. Set 'follow' to true to
// stream the log. Set 'follow' to false and specify the number of lines (e.g.
// "100" or "all") to tail the log.
GetContainerLogs(ctx context.Context, pod *v1.Pod, containerID ContainerID, logOptions *v1.PodLogOptions, stdout, stderr io.Writer) (err error)
// Delete a container. If the container is still running, an error is returned.
DeleteContainer(containerID ContainerID) error
// ImageService provides methods to image-related methods.
ImageService
// UpdatePodCIDR sends a new podCIDR to the runtime.
// This method just proxies a new runtimeConfig with the updated
// CIDR value down to the runtime shim.
UpdatePodCIDR(podCIDR string) error
}
// StreamingRuntime is the interface implemented by runtimes that handle the serving of the
// streaming calls (exec/attach/port-forward) themselves. In this case, Kubelet should redirect to
// the runtime server.
type StreamingRuntime interface {
GetExec(id ContainerID, cmd []string, stdin, stdout, stderr, tty bool) (*url.URL, error)
GetAttach(id ContainerID, stdin, stdout, stderr, tty bool) (*url.URL, error)
GetPortForward(podName, podNamespace string, podUID types.UID, ports []int32) (*url.URL, error)
}
type ImageService interface {
// PullImage pulls an image from the network to local storage using the supplied
// secrets if necessary. It returns a reference (digest or ID) to the pulled image.
PullImage(image ImageSpec, pullSecrets []v1.Secret, podSandboxConfig *runtimeapi.PodSandboxConfig) (string, error)
// GetImageRef gets the reference (digest or ID) of the image which has already been in
// the local storage. It returns ("", nil) if the image isn't in the local storage.
GetImageRef(image ImageSpec) (string, error)
// Gets all images currently on the machine.
ListImages() ([]Image, error)
// Removes the specified image.
RemoveImage(image ImageSpec) error
// Returns Image statistics.
ImageStats() (*ImageStats, error)
}
type ContainerAttacher interface {
AttachContainer(id ContainerID, stdin io.Reader, stdout, stderr io.WriteCloser, tty bool, resize <-chan remotecommand.TerminalSize) (err error)
}
type ContainerCommandRunner interface {
// RunInContainer synchronously executes the command in the container, and returns the output.
// If the command completes with a non-0 exit code, a k8s.io/utils/exec.ExitError will be returned.
RunInContainer(id ContainerID, cmd []string, timeout time.Duration) ([]byte, error)
}
// Pod is a group of containers.
type Pod struct {
// The ID of the pod, which can be used to retrieve a particular pod
// from the pod list returned by GetPods().
ID types.UID
// The name and namespace of the pod, which is readable by human.
Name string
Namespace string
// List of containers that belongs to this pod. It may contain only
// running containers, or mixed with dead ones (when GetPods(true)).
Containers []*Container
// List of sandboxes associated with this pod. The sandboxes are converted
// to Container temporariliy to avoid substantial changes to other
// components. This is only populated by kuberuntime.
// TODO: use the runtimeApi.PodSandbox type directly.
Sandboxes []*Container
}
// PodPair contains both runtime#Pod and api#Pod
type PodPair struct {
// APIPod is the v1.Pod
APIPod *v1.Pod
// RunningPod is the pod defined in pkg/kubelet/container/runtime#Pod
RunningPod *Pod
}
// ContainerID is a type that identifies a container.
type ContainerID struct {
// The type of the container runtime. e.g. 'docker'.
Type string
// The identification of the container, this is comsumable by
// the underlying container runtime. (Note that the container
// runtime interface still takes the whole struct as input).
ID string
}
func BuildContainerID(typ, ID string) ContainerID {
return ContainerID{Type: typ, ID: ID}
}
// Convenience method for creating a ContainerID from an ID string.
func ParseContainerID(containerID string) ContainerID {
var id ContainerID
if err := id.ParseString(containerID); err != nil {
klog.Error(err)
}
return id
}
func (c *ContainerID) ParseString(data string) error {
// Trim the quotes and split the type and ID.
parts := strings.Split(strings.Trim(data, "\""), "://")
if len(parts) != 2 {
return fmt.Errorf("invalid container ID: %q", data)
}
c.Type, c.ID = parts[0], parts[1]
return nil
}
func (c *ContainerID) String() string {
return fmt.Sprintf("%s://%s", c.Type, c.ID)
}
func (c *ContainerID) IsEmpty() bool {
return *c == ContainerID{}
}
func (c *ContainerID) MarshalJSON() ([]byte, error) {
return []byte(fmt.Sprintf("%q", c.String())), nil
}
func (c *ContainerID) UnmarshalJSON(data []byte) error {
return c.ParseString(string(data))
}
// DockerID is an ID of docker container. It is a type to make it clear when we're working with docker container Ids
type DockerID string
func (id DockerID) ContainerID() ContainerID {
return ContainerID{
Type: "docker",
ID: string(id),
}
}
type ContainerState string
const (
ContainerStateCreated ContainerState = "created"
ContainerStateRunning ContainerState = "running"
ContainerStateExited ContainerState = "exited"
// This unknown encompasses all the states that we currently don't care.
ContainerStateUnknown ContainerState = "unknown"
)
// Container provides the runtime information for a container, such as ID, hash,
// state of the container.
type Container struct {
// The ID of the container, used by the container runtime to identify
// a container.
ID ContainerID
// The name of the container, which should be the same as specified by
// v1.Container.
Name string
// The image name of the container, this also includes the tag of the image,
// the expected form is "NAME:TAG".
Image string
// The id of the image used by the container.
ImageID string
// Hash of the container, used for comparison. Optional for containers
// not managed by kubelet.
Hash uint64
// State is the state of the container.
State ContainerState
}
// PodStatus represents the status of the pod and its containers.
// v1.PodStatus can be derived from examining PodStatus and v1.Pod.
type PodStatus struct {
// ID of the pod.
ID types.UID
// Name of the pod.
Name string
// Namespace of the pod.
Namespace string
// IP of the pod.
IP string
// Status of containers in the pod.
ContainerStatuses []*ContainerStatus
// Status of the pod sandbox.
// Only for kuberuntime now, other runtime may keep it nil.
SandboxStatuses []*runtimeapi.PodSandboxStatus
}
// ContainerStatus represents the status of a container.
type ContainerStatus struct {
// ID of the container.
ID ContainerID
// Name of the container.
Name string
// Status of the container.
State ContainerState
// Creation time of the container.
CreatedAt time.Time
// Start time of the container.
StartedAt time.Time
// Finish time of the container.
FinishedAt time.Time
// Exit code of the container.
ExitCode int
// Name of the image, this also includes the tag of the image,
// the expected form is "NAME:TAG".
Image string
// ID of the image.
ImageID string
// Hash of the container, used for comparison.
Hash uint64
// Number of times that the container has been restarted.
RestartCount int
// A string explains why container is in such a status.
Reason string
// Message written by the container before exiting (stored in
// TerminationMessagePath).
Message string
}
// FindContainerStatusByName returns container status in the pod status with the given name.
// When there are multiple containers' statuses with the same name, the first match will be returned.
func (podStatus *PodStatus) FindContainerStatusByName(containerName string) *ContainerStatus {
for _, containerStatus := range podStatus.ContainerStatuses {
if containerStatus.Name == containerName {
return containerStatus
}
}
return nil
}
// Get container status of all the running containers in a pod
func (podStatus *PodStatus) GetRunningContainerStatuses() []*ContainerStatus {
runningContainerStatuses := []*ContainerStatus{}
for _, containerStatus := range podStatus.ContainerStatuses {
if containerStatus.State == ContainerStateRunning {
runningContainerStatuses = append(runningContainerStatuses, containerStatus)
}
}
return runningContainerStatuses
}
// Basic information about a container image.
type Image struct {
// ID of the image.
ID string
// Other names by which this image is known.
RepoTags []string
// Digests by which this image is known.
RepoDigests []string
// The size of the image in bytes.
Size int64
}
type EnvVar struct {
Name string
Value string
}
type Annotation struct {
Name string
Value string
}
type Mount struct {
// Name of the volume mount.
// TODO(yifan): Remove this field, as this is not representing the unique name of the mount,
// but the volume name only.
Name string
// Path of the mount within the container.
ContainerPath string
// Path of the mount on the host.
HostPath string
// Whether the mount is read-only.
ReadOnly bool
// Whether the mount needs SELinux relabeling
SELinuxRelabel bool
// Requested propagation mode
Propagation runtimeapi.MountPropagation
}
type PortMapping struct {
// Name of the port mapping
Name string
// Protocol of the port mapping.
Protocol v1.Protocol
// The port number within the container.
ContainerPort int
// The port number on the host.
HostPort int
// The host IP.
HostIP string
}
type DeviceInfo struct {
// Path on host for mapping
PathOnHost string
// Path in Container to map
PathInContainer string
// Cgroup permissions
Permissions string
}
// RunContainerOptions specify the options which are necessary for running containers
type RunContainerOptions struct {
// The environment variables list.
Envs []EnvVar
// The mounts for the containers.
Mounts []Mount
// The host devices mapped into the containers.
Devices []DeviceInfo
// The port mappings for the containers.
PortMappings []PortMapping
// The annotations for the container
// These annotations are generated by other components (i.e.,
// not users). Currently, only device plugins populate the annotations.
Annotations []Annotation
// If the container has specified the TerminationMessagePath, then
// this directory will be used to create and mount the log file to
// container.TerminationMessagePath
PodContainerDir string
// The type of container rootfs
ReadOnly bool
// hostname for pod containers
Hostname string
// EnableHostUserNamespace sets userns=host when users request host namespaces (pid, ipc, net),
// are using non-namespaced capabilities (mknod, sys_time, sys_module), the pod contains a privileged container,
// or using host path volumes.
// This should only be enabled when the container runtime is performing user remapping AND if the
// experimental behavior is desired.
EnableHostUserNamespace bool
}
// VolumeInfo contains information about the volume.
type VolumeInfo struct {
// Mounter is the volume's mounter
Mounter volume.Mounter
// BlockVolumeMapper is the Block volume's mapper
BlockVolumeMapper volume.BlockVolumeMapper
// SELinuxLabeled indicates whether this volume has had the
// pod's SELinux label applied to it or not
SELinuxLabeled bool
// Whether the volume permission is set to read-only or not
// This value is passed from volume.spec
ReadOnly bool
// Inner volume spec name, which is the PV name if used, otherwise
// it is the same as the outer volume spec name.
InnerVolumeSpecName string
}
type VolumeMap map[string]VolumeInfo
// RuntimeConditionType is the types of required runtime conditions.
type RuntimeConditionType string
const (
// RuntimeReady means the runtime is up and ready to accept basic containers.
RuntimeReady RuntimeConditionType = "RuntimeReady"
// NetworkReady means the runtime network is up and ready to accept containers which require network.
NetworkReady RuntimeConditionType = "NetworkReady"
)
// RuntimeStatus contains the status of the runtime.
type RuntimeStatus struct {
// Conditions is an array of current observed runtime conditions.
Conditions []RuntimeCondition
}
// GetRuntimeCondition gets a specified runtime condition from the runtime status.
func (r *RuntimeStatus) GetRuntimeCondition(t RuntimeConditionType) *RuntimeCondition {
for i := range r.Conditions {
c := &r.Conditions[i]
if c.Type == t {
return c
}
}
return nil
}
// String formats the runtime status into human readable string.
func (s *RuntimeStatus) String() string {
var ss []string
for _, c := range s.Conditions {
ss = append(ss, c.String())
}
return fmt.Sprintf("Runtime Conditions: %s", strings.Join(ss, ", "))
}
// RuntimeCondition contains condition information for the runtime.
type RuntimeCondition struct {
// Type of runtime condition.
Type RuntimeConditionType
// Status of the condition, one of true/false.
Status bool
// Reason is brief reason for the condition's last transition.
Reason string
// Message is human readable message indicating details about last transition.
Message string
}
// String formats the runtime condition into human readable string.
func (c *RuntimeCondition) String() string {
return fmt.Sprintf("%s=%t reason:%s message:%s", c.Type, c.Status, c.Reason, c.Message)
}
type Pods []*Pod
// FindPodByID finds and returns a pod in the pod list by UID. It will return an empty pod
// if not found.
func (p Pods) FindPodByID(podUID types.UID) Pod {
for i := range p {
if p[i].ID == podUID {
return *p[i]
}
}
return Pod{}
}
// FindPodByFullName finds and returns a pod in the pod list by the full name.
// It will return an empty pod if not found.
func (p Pods) FindPodByFullName(podFullName string) Pod {
for i := range p {
if BuildPodFullName(p[i].Name, p[i].Namespace) == podFullName {
return *p[i]
}
}
return Pod{}
}
// FindPod combines FindPodByID and FindPodByFullName, it finds and returns a pod in the
// pod list either by the full name or the pod ID. It will return an empty pod
// if not found.
func (p Pods) FindPod(podFullName string, podUID types.UID) Pod {
if len(podFullName) > 0 {
return p.FindPodByFullName(podFullName)
}
return p.FindPodByID(podUID)
}
// FindContainerByName returns a container in the pod with the given name.
// When there are multiple containers with the same name, the first match will
// be returned.
func (p *Pod) FindContainerByName(containerName string) *Container {
for _, c := range p.Containers {
if c.Name == containerName {
return c
}
}
return nil
}
func (p *Pod) FindContainerByID(id ContainerID) *Container {
for _, c := range p.Containers {
if c.ID == id {
return c
}
}
return nil
}
func (p *Pod) FindSandboxByID(id ContainerID) *Container {
for _, c := range p.Sandboxes {
if c.ID == id {
return c
}
}
return nil
}
// ToAPIPod converts Pod to v1.Pod. Note that if a field in v1.Pod has no
// corresponding field in Pod, the field would not be populated.
func (p *Pod) ToAPIPod() *v1.Pod {
var pod v1.Pod
pod.UID = p.ID
pod.Name = p.Name
pod.Namespace = p.Namespace
for _, c := range p.Containers {
var container v1.Container
container.Name = c.Name
container.Image = c.Image
pod.Spec.Containers = append(pod.Spec.Containers, container)
}
return &pod
}
// IsEmpty returns true if the pod is empty.
func (p *Pod) IsEmpty() bool {
return reflect.DeepEqual(p, &Pod{})
}
// GetPodFullName returns a name that uniquely identifies a pod.
func GetPodFullName(pod *v1.Pod) string {
// Use underscore as the delimiter because it is not allowed in pod name
// (DNS subdomain format), while allowed in the container name format.
return pod.Name + "_" + pod.Namespace
}
// Build the pod full name from pod name and namespace.
func BuildPodFullName(name, namespace string) string {
return name + "_" + namespace
}
// Parse the pod full name.
func ParsePodFullName(podFullName string) (string, string, error) {
parts := strings.Split(podFullName, "_")
if len(parts) != 2 || parts[0] == "" || parts[1] == "" {
return "", "", fmt.Errorf("failed to parse the pod full name %q", podFullName)
}
return parts[0], parts[1], nil
}
// Option is a functional option type for Runtime, useful for
// completely optional settings.
type Option func(Runtime)
// Sort the container statuses by creation time.
type SortContainerStatusesByCreationTime []*ContainerStatus
func (s SortContainerStatusesByCreationTime) Len() int { return len(s) }
func (s SortContainerStatusesByCreationTime) Swap(i, j int) { s[i], s[j] = s[j], s[i] }
func (s SortContainerStatusesByCreationTime) Less(i, j int) bool {
return s[i].CreatedAt.Before(s[j].CreatedAt)
}
const (
// MaxPodTerminationMessageLogLength is the maximum bytes any one pod may have written
// as termination message output across all containers. Containers will be evenly truncated
// until output is below this limit.
MaxPodTerminationMessageLogLength = 1024 * 12
// MaxContainerTerminationMessageLength is the upper bound any one container may write to
// its termination message path. Contents above this length will be truncated.
MaxContainerTerminationMessageLength = 1024 * 4
// MaxContainerTerminationMessageLogLength is the maximum bytes any one container will
// have written to its termination message when the message is read from the logs.
MaxContainerTerminationMessageLogLength = 1024 * 2
// MaxContainerTerminationMessageLogLines is the maximum number of previous lines of
// log output that the termination message can contain.
MaxContainerTerminationMessageLogLines = 80
)

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/*
Copyright 2015 The Kubernetes 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.
*/
package container
import (
"sync"
"time"
)
var (
// TODO(yifan): Maybe set the them as parameters for NewCache().
defaultCachePeriod = time.Second * 2
)
type RuntimeCache interface {
GetPods() ([]*Pod, error)
ForceUpdateIfOlder(time.Time) error
}
type podsGetter interface {
GetPods(bool) ([]*Pod, error)
}
// NewRuntimeCache creates a container runtime cache.
func NewRuntimeCache(getter podsGetter) (RuntimeCache, error) {
return &runtimeCache{
getter: getter,
}, nil
}
// runtimeCache caches a list of pods. It records a timestamp (cacheTime) right
// before updating the pods, so the timestamp is at most as new as the pods
// (and can be slightly older). The timestamp always moves forward. Callers are
// expected not to modify the pods returned from GetPods.
type runtimeCache struct {
sync.Mutex
// The underlying container runtime used to update the cache.
getter podsGetter
// Last time when cache was updated.
cacheTime time.Time
// The content of the cache.
pods []*Pod
}
// GetPods returns the cached pods if they are not outdated; otherwise, it
// retrieves the latest pods and return them.
func (r *runtimeCache) GetPods() ([]*Pod, error) {
r.Lock()
defer r.Unlock()
if time.Since(r.cacheTime) > defaultCachePeriod {
if err := r.updateCache(); err != nil {
return nil, err
}
}
return r.pods, nil
}
func (r *runtimeCache) ForceUpdateIfOlder(minExpectedCacheTime time.Time) error {
r.Lock()
defer r.Unlock()
if r.cacheTime.Before(minExpectedCacheTime) {
return r.updateCache()
}
return nil
}
func (r *runtimeCache) updateCache() error {
pods, timestamp, err := r.getPodsWithTimestamp()
if err != nil {
return err
}
r.pods, r.cacheTime = pods, timestamp
return nil
}
// getPodsWithTimestamp records a timestamp and retrieves pods from the getter.
func (r *runtimeCache) getPodsWithTimestamp() ([]*Pod, time.Time, error) {
// Always record the timestamp before getting the pods to avoid stale pods.
timestamp := time.Now()
pods, err := r.getter.GetPods(false)
return pods, timestamp, err
}

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vendor/k8s.io/kubernetes/pkg/kubelet/container/runtime_cache_fake.go generated vendored Normal file
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/*
Copyright 2015 The Kubernetes 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.
*/
package container
// TestRunTimeCache embeds runtimeCache with some additional methods for testing.
// It must be declared in the container package to have visibility to runtimeCache.
// It cannot be in a "..._test.go" file in order for runtime_cache_test.go to have cross-package visibility to it.
// (cross-package declarations in test files cannot be used from dot imports if this package is vendored)
type TestRuntimeCache struct {
runtimeCache
}
func (r *TestRuntimeCache) UpdateCacheWithLock() error {
r.Lock()
defer r.Unlock()
return r.updateCache()
}
func (r *TestRuntimeCache) GetCachedPods() []*Pod {
r.Lock()
defer r.Unlock()
return r.pods
}
func NewTestRuntimeCache(getter podsGetter) *TestRuntimeCache {
return &TestRuntimeCache{
runtimeCache: runtimeCache{
getter: getter,
},
}
}

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/*
Copyright 2015 The Kubernetes 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.
*/
package container
import (
"errors"
"fmt"
utilerrors "k8s.io/apimachinery/pkg/util/errors"
)
// TODO(random-liu): We need to better organize runtime errors for introspection.
// Container Terminated and Kubelet is backing off the restart
var ErrCrashLoopBackOff = errors.New("CrashLoopBackOff")
var (
// ErrContainerNotFound returned when a container in the given pod with the
// given container name was not found, amongst those managed by the kubelet.
ErrContainerNotFound = errors.New("no matching container")
)
var (
ErrRunContainer = errors.New("RunContainerError")
ErrKillContainer = errors.New("KillContainerError")
ErrVerifyNonRoot = errors.New("VerifyNonRootError")
ErrRunInitContainer = errors.New("RunInitContainerError")
ErrCreatePodSandbox = errors.New("CreatePodSandboxError")
ErrConfigPodSandbox = errors.New("ConfigPodSandboxError")
ErrKillPodSandbox = errors.New("KillPodSandboxError")
)
var (
ErrSetupNetwork = errors.New("SetupNetworkError")
ErrTeardownNetwork = errors.New("TeardownNetworkError")
)
// SyncAction indicates different kind of actions in SyncPod() and KillPod(). Now there are only actions
// about start/kill container and setup/teardown network.
type SyncAction string
const (
StartContainer SyncAction = "StartContainer"
KillContainer SyncAction = "KillContainer"
SetupNetwork SyncAction = "SetupNetwork"
TeardownNetwork SyncAction = "TeardownNetwork"
InitContainer SyncAction = "InitContainer"
CreatePodSandbox SyncAction = "CreatePodSandbox"
ConfigPodSandbox SyncAction = "ConfigPodSandbox"
KillPodSandbox SyncAction = "KillPodSandbox"
)
// SyncResult is the result of sync action.
type SyncResult struct {
// The associated action of the result
Action SyncAction
// The target of the action, now the target can only be:
// * Container: Target should be container name
// * Network: Target is useless now, we just set it as pod full name now
Target interface{}
// Brief error reason
Error error
// Human readable error reason
Message string
}
// NewSyncResult generates new SyncResult with specific Action and Target
func NewSyncResult(action SyncAction, target interface{}) *SyncResult {
return &SyncResult{Action: action, Target: target}
}
// Fail fails the SyncResult with specific error and message
func (r *SyncResult) Fail(err error, msg string) {
r.Error, r.Message = err, msg
}
// PodSyncResult is the summary result of SyncPod() and KillPod()
type PodSyncResult struct {
// Result of different sync actions
SyncResults []*SyncResult
// Error encountered in SyncPod() and KillPod() that is not already included in SyncResults
SyncError error
}
// AddSyncResult adds multiple SyncResult to current PodSyncResult
func (p *PodSyncResult) AddSyncResult(result ...*SyncResult) {
p.SyncResults = append(p.SyncResults, result...)
}
// AddPodSyncResult merges a PodSyncResult to current one
func (p *PodSyncResult) AddPodSyncResult(result PodSyncResult) {
p.AddSyncResult(result.SyncResults...)
p.SyncError = result.SyncError
}
// Fail fails the PodSyncResult with an error occurred in SyncPod() and KillPod() itself
func (p *PodSyncResult) Fail(err error) {
p.SyncError = err
}
// Error returns an error summarizing all the errors in PodSyncResult
func (p *PodSyncResult) Error() error {
errlist := []error{}
if p.SyncError != nil {
errlist = append(errlist, fmt.Errorf("failed to SyncPod: %v\n", p.SyncError))
}
for _, result := range p.SyncResults {
if result.Error != nil {
errlist = append(errlist, fmt.Errorf("failed to %q for %q with %v: %q\n", result.Action, result.Target,
result.Error, result.Message))
}
}
return utilerrors.NewAggregate(errlist)
}