Documentation ¶
Index ¶
- func BuildPodFullName(name, namespace string) string
- func GenerateContainerRef(pod *api.Pod, container *api.Container) (*api.ObjectReference, error)
- func GetPodFullName(pod *api.Pod) string
- func ParsePodFullName(podFullName string) (string, string, error)
- func ShouldContainerBeRestarted(container *api.Container, pod *api.Pod, podStatus *api.PodStatus, ...) bool
- func StartPty(c *exec.Cmd) (*os.File, error)
- func TrimRuntimePrefix(fullString string) string
- type Container
- type ContainerCommandRunner
- type ContainerID
- type FakeOS
- type FakeRuntime
- func (f *FakeRuntime) AssertCalls(calls []string) error
- func (f *FakeRuntime) AssertKilledContainers(containers []string) error
- func (f *FakeRuntime) AssertKilledPods(pods []string) error
- func (f *FakeRuntime) AssertStartedContainers(containers []string) error
- func (f *FakeRuntime) AssertStartedPods(pods []string) error
- func (f *FakeRuntime) ClearCalls()
- func (f *FakeRuntime) GetContainers(all bool) ([]*Container, error)
- func (f *FakeRuntime) GetPodStatus(pod *Pod) (api.PodStatus, error)
- func (f *FakeRuntime) GetPods(all bool) ([]*Pod, error)
- func (f *FakeRuntime) KillContainerInPod(container api.Container, pod *api.Pod) error
- func (f *FakeRuntime) KillPod(pod *api.Pod) error
- func (f *FakeRuntime) RunContainerInPod(container api.Container, pod *api.Pod, ...) error
- func (f *FakeRuntime) SyncPod(pod *api.Pod, _ Pod, _ api.PodStatus) error
- func (f *FakeRuntime) Version() (map[string]string, error)
- type FakeRuntimeCache
- type HandlerRunner
- type Image
- type ImageSpec
- type OSInterface
- type Pod
- type Pods
- type ReadinessManager
- type RealOS
- type RefManager
- type RunContainerOptions
- type RunContainerOptionsGenerator
- type Runtime
- type RuntimeCache
- type RuntimeHooks
- type Version
- type VolumeMap
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
func BuildPodFullName ¶
Build the pod full name from pod name and namespace.
func GenerateContainerRef ¶
GenerateContainerRef returns an *api.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 GetPodFullName ¶
GetPodFullName returns a name that uniquely identifies a pod.
func ParsePodFullName ¶
Parse the pod full name.
func ShouldContainerBeRestarted ¶
func ShouldContainerBeRestarted(container *api.Container, pod *api.Pod, podStatus *api.PodStatus, readinessManager *ReadinessManager) bool
ShouldContainerBeRestarted checks whether a container needs to be restarted. TODO(yifan): Think about how to refactor this.
func TrimRuntimePrefix ¶
Trims runtime prefix from ID or image name (e.g.: docker://busybox -> busybox).
Types ¶
type Container ¶
type Container struct { // The ID of the container, used by the container runtime to identify // a container. ID types.UID // The name of the container, which should be the same as specified by // api.Container. Name string // The image name of the container. Image string // Hash of the container, used for comparison. Optional for containers // not managed by kubelet. Hash uint64 // The timestamp of the creation time of the container. // TODO(yifan): Consider to move it to api.ContainerStatus. Created int64 }
Container provides the runtime information for a container, such as ID, hash, status of the container.
type ContainerCommandRunner ¶
type ContainerCommandRunner interface { // TODO(vmarmol): Merge RunInContainer and ExecInContainer. // Runs the command in the container of the specified pod using nsinit. // TODO(yifan): Use strong type for containerID. RunInContainer(containerID string, cmd []string) ([]byte, error) // Runs the command in the container of the specified pod using nsenter. // Attaches the processes stdin, stdout, and stderr. Optionally uses a // tty. // TODO(yifan): Use strong type for containerID. ExecInContainer(containerID string, cmd []string, stdin io.Reader, stdout, stderr io.WriteCloser, tty bool) error // Forward the specified port from the specified pod to the stream. PortForward(pod *Pod, port uint16, stream io.ReadWriteCloser) error }
CommandRunner encapsulates the command runner interfaces for testability.
type ContainerID ¶
type ContainerID struct { // The type of the container runtime. e.g. 'docker', 'rkt'. 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 }
ContainerID is a type that identifies a container.
func BuildContainerID ¶
func BuildContainerID(typ, ID string) ContainerID
func (*ContainerID) MarshalJSON ¶
func (c *ContainerID) MarshalJSON() ([]byte, error)
func (*ContainerID) ParseString ¶
func (c *ContainerID) ParseString(data string) error
func (*ContainerID) String ¶
func (c *ContainerID) String() string
func (*ContainerID) UnmarshalJSON ¶
func (c *ContainerID) UnmarshalJSON(data []byte) error
type FakeOS ¶
type FakeOS struct{}
FakeOS mocks out certain OS calls to avoid perturbing the filesystem on the test machine.
type FakeRuntime ¶
type FakeRuntime struct { sync.Mutex CalledFunctions []string Podlist []*Pod ContainerList []*Container PodStatus api.PodStatus StartedPods []string KilledPods []string StartedContainers []string KilledContainers []string VersionInfo map[string]string Err error }
FakeRuntime is a fake container runtime for testing.
func (*FakeRuntime) AssertCalls ¶
func (f *FakeRuntime) AssertCalls(calls []string) error
AssertCalls test if the invoked functions are as expected.
func (*FakeRuntime) AssertKilledContainers ¶
func (f *FakeRuntime) AssertKilledContainers(containers []string) error
func (*FakeRuntime) AssertKilledPods ¶
func (f *FakeRuntime) AssertKilledPods(pods []string) error
func (*FakeRuntime) AssertStartedContainers ¶
func (f *FakeRuntime) AssertStartedContainers(containers []string) error
func (*FakeRuntime) AssertStartedPods ¶
func (f *FakeRuntime) AssertStartedPods(pods []string) error
func (*FakeRuntime) ClearCalls ¶
func (f *FakeRuntime) ClearCalls()
ClearCalls resets the FakeRuntime to the initial state.
func (*FakeRuntime) GetContainers ¶
func (f *FakeRuntime) GetContainers(all bool) ([]*Container, error)
func (*FakeRuntime) GetPodStatus ¶
func (f *FakeRuntime) GetPodStatus(pod *Pod) (api.PodStatus, error)
func (*FakeRuntime) KillContainerInPod ¶
func (*FakeRuntime) RunContainerInPod ¶
func (f *FakeRuntime) RunContainerInPod(container api.Container, pod *api.Pod, volumeMap map[string]volume.VolumePlugin) error
type FakeRuntimeCache ¶
type FakeRuntimeCache struct {
// contains filtered or unexported fields
}
func (*FakeRuntimeCache) ForceUpdateIfOlder ¶
func (f *FakeRuntimeCache) ForceUpdateIfOlder(time.Time) error
func (*FakeRuntimeCache) GetPods ¶
func (f *FakeRuntimeCache) GetPods() ([]*Pod, error)
type HandlerRunner ¶
type HandlerRunner interface {
Run(containerID string, pod *api.Pod, container *api.Container, handler *api.Handler) error
}
HandlerRunner runs a lifecycle handler for a container.
type Image ¶
type Image struct { // ID of the image. ID string // Other names by which this image is known. Tags []string // The size of the image in bytes. Size int64 }
Basic information about a container image.
type ImageSpec ¶
type ImageSpec struct {
Image 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 OSInterface ¶
type OSInterface interface { Mkdir(path string, perm os.FileMode) error Symlink(oldname string, newname string) error }
OSInterface collects system level operations that need to be mocked out during tests.
type Pod ¶
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 // The status of the pod. // TODO(yifan): Inspect and get the statuses for all pods can be expensive, // maybe we want to get one pod's status at a time (e.g. GetPodStatus() // for the particular pod after we GetPods()). Status api.PodStatus }
Pod is a group of containers, with the status of the pod.
func (*Pod) FindContainerByName ¶
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.
type Pods ¶
type Pods []*Pod
func (Pods) FindPod ¶
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 (Pods) FindPodByFullName ¶
FindPodByFullName finds and returns a pod in the pod list by the full name. It will return an empty pod if not found.
type ReadinessManager ¶
type ReadinessManager struct { // guards states sync.RWMutex // contains filtered or unexported fields }
ReadinessManager maintains the readiness information(probe results) of containers over time to allow for implementation of health thresholds. This manager is thread-safe, no locks are necessary for the caller.
func NewReadinessManager ¶
func NewReadinessManager() *ReadinessManager
NewReadinessManager creates ane returns a readiness manager with empty contents.
func (*ReadinessManager) GetReadiness ¶
func (r *ReadinessManager) GetReadiness(id string) bool
GetReadiness returns the readiness value for the container with the given ID. If the readiness value is found, returns it. If the readiness is not found, returns false.
func (*ReadinessManager) RemoveReadiness ¶
func (r *ReadinessManager) RemoveReadiness(id string)
RemoveReadiness clears the readiness value for the container with the given ID.
func (*ReadinessManager) SetReadiness ¶
func (r *ReadinessManager) SetReadiness(id string, value bool)
SetReadiness sets the readiness value for the container with the given ID.
type RealOS ¶
type RealOS struct{}
RealOS is used to dispatch the real system level operaitons.
type RefManager ¶
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.
func NewRefManager ¶
func NewRefManager() *RefManager
NewRefManager creates and returns a container reference manager with empty contents.
func (*RefManager) ClearRef ¶
func (c *RefManager) ClearRef(id string)
ClearRef forgets the given container id and its associated container reference. TODO(yifan): This is currently never called. Consider to remove this function, or figure out when to clear the references.
func (*RefManager) GetRef ¶
func (c *RefManager) GetRef(id string) (ref *api.ObjectReference, ok bool)
GetRef returns the container reference of the given ID, or (nil, false) if none is stored.
func (*RefManager) SetRef ¶
func (c *RefManager) SetRef(id string, ref *api.ObjectReference)
SetRef stores a reference to a pod's container, associating it with the given container ID.
type RunContainerOptions ¶
type RunContainerOptions struct { // The environment variables, they are in the form of 'key=value'. Envs []string // The mounts for the containers, they are in the form of: // 'hostPath:containerPath', or // 'hostPath:containerPath:ro', if the path read only. Binds []string // 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 list of DNS servers for the container to use. DNS []string // The list of DNS search domains. DNSSearch []string // Docker namespace identifiers(currently we have 'NetMode' and 'IpcMode'. // These are for docker to attach a container in a pod to the pod infra // container's namespace. // TODO(yifan): Remove these after we pushed the pod infra container logic // into docker's container runtime. NetMode string IpcMode string // The parent cgroup to pass to Docker CgroupParent string }
RunContainerOptions specify the options which are necessary for running containers
type RunContainerOptionsGenerator ¶
type RunContainerOptionsGenerator interface {
GenerateRunContainerOptions(pod *api.Pod, container *api.Container, netMode, ipcMode string) (*RunContainerOptions, error)
}
RunContainerOptionsGenerator generates the options that necessary for container runtime to run a container. TODO(yifan): Remove netMode, ipcMode.
type Runtime ¶
type Runtime interface { // Version returns the version information of the container runtime. Version() (Version, error) // GetPods returns a list containers group 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) // Syncs the running pod into the desired pod. SyncPod(pod *api.Pod, runningPod Pod, podStatus api.PodStatus) error // KillPod kills all the containers of a pod. KillPod(pod Pod) error // GetPodStatus retrieves the status of the pod, including the information of // all containers in the pod. GetPodStatus(*api.Pod) (*api.PodStatus, error) // PullImage pulls an image from the network to local storage using the supplied // secrets if necessary. PullImage(image ImageSpec, secrets []api.Secret) error // IsImagePresent checks whether the container image is already in the local storage. IsImagePresent(image ImageSpec) (bool, error) // Gets all images currently on the machine. ListImages() ([]Image, error) // Removes the specified image. RemoveImage(image ImageSpec) 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(pod *api.Pod, containerID, tail string, follow bool, stdout, stderr io.Writer) (err error) // ContainerCommandRunner encapsulates the command runner interfaces for testability. ContainerCommandRunner }
Runtime interface defines the interfaces that should be implemented by a container runtime.
type RuntimeCache ¶
func NewFakeRuntimeCache ¶
func NewFakeRuntimeCache(getter podsGetter) RuntimeCache
func NewRuntimeCache ¶
func NewRuntimeCache(getter podsGetter) (RuntimeCache, error)
NewRuntimeCache creates a container runtime cache.
type RuntimeHooks ¶
type RuntimeHooks interface { // Determines whether the runtime should pull the specified container's image. ShouldPullImage(pod *api.Pod, container *api.Container, imagePresent bool) bool // Runs after an image is pulled reporting its status. Error may be nil // for a successful pull. ReportImagePull(pod *api.Pod, container *api.Container, err error) }
Customizable hooks injected into container runtimes.
type Version ¶
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 }