move dependencies to vendor

vendor/github.com/docker/libcontainer/container.go

@@ -0,0 +1,162 @@
+// Libcontainer provides a native Go implementation for creating containers
+// with namespaces, cgroups, capabilities, and filesystem access controls.
+// It allows you to manage the lifecycle of the container performing additional operations
+// after the container is created.
+package libcontainer
+
+import (
+	"github.com/docker/libcontainer/configs"
+)
+
+// The status of a container.
+type Status int
+
+const (
+	// The container exists and is running.
+	Running Status = iota + 1
+
+	// The container exists, it is in the process of being paused.
+	Pausing
+
+	// The container exists, but all its processes are paused.
+	Paused
+
+	// The container exists, but its state is saved on disk
+	Checkpointed
+
+	// The container does not exist.
+	Destroyed
+)
+
+// State represents a running container's state
+type State struct {
+	// ID is the container ID.
+	ID string `json:"id"`
+
+	// InitProcessPid is the init process id in the parent namespace.
+	InitProcessPid int `json:"init_process_pid"`
+
+	// InitProcessStartTime is the init process start time.
+	InitProcessStartTime string `json:"init_process_start"`
+
+	// Path to all the cgroups setup for a container. Key is cgroup subsystem name
+	// with the value as the path.
+	CgroupPaths map[string]string `json:"cgroup_paths"`
+
+	// NamespacePaths are filepaths to the container's namespaces. Key is the namespace type
+	// with the value as the path.
+	NamespacePaths map[configs.NamespaceType]string `json:"namespace_paths"`
+
+	// Config is the container's configuration.
+	Config configs.Config `json:"config"`
+
+	// Container's standard descriptors (std{in,out,err}), needed for checkpoint and restore
+	ExternalDescriptors []string `json:"external_descriptors,omitempty"`
+}
+
+// A libcontainer container object.
+//
+// Each container is thread-safe within the same process. Since a container can
+// be destroyed by a separate process, any function may return that the container
+// was not found.
+type Container interface {
+	// Returns the ID of the container
+	ID() string
+
+	// Returns the current status of the container.
+	//
+	// errors:
+	// ContainerDestroyed - Container no longer exists,
+	// Systemerror - System error.
+	Status() (Status, error)
+
+	// State returns the current container's state information.
+	//
+	// errors:
+	// Systemerror - System error.
+	State() (*State, error)
+
+	// Returns the current config of the container.
+	Config() configs.Config
+
+	// Returns the PIDs inside this container. The PIDs are in the namespace of the calling process.
+	//
+	// errors:
+	// ContainerDestroyed - Container no longer exists,
+	// Systemerror - System error.
+	//
+	// Some of the returned PIDs may no longer refer to processes in the Container, unless
+	// the Container state is PAUSED in which case every PID in the slice is valid.
+	Processes() ([]int, error)
+
+	// Returns statistics for the container.
+	//
+	// errors:
+	// ContainerDestroyed - Container no longer exists,
+	// Systemerror - System error.
+	Stats() (*Stats, error)
+
+	// Set cgroup resources of container as configured
+	//
+	// We can use this to change resources when containers are running.
+	//
+	// errors:
+	// Systemerror - System error.
+	Set(config configs.Config) error
+
+	// Start a process inside the container. Returns error if process fails to
+	// start. You can track process lifecycle with passed Process structure.
+	//
+	// errors:
+	// ContainerDestroyed - Container no longer exists,
+	// ConfigInvalid - config is invalid,
+	// ContainerPaused - Container is paused,
+	// Systemerror - System error.
+	Start(process *Process) (err error)
+
+	// Checkpoint checkpoints the running container's state to disk using the criu(8) utility.
+	//
+	// errors:
+	// Systemerror - System error.
+	Checkpoint(criuOpts *CriuOpts) error
+
+	// Restore restores the checkpointed container to a running state using the criu(8) utiity.
+	//
+	// errors:
+	// Systemerror - System error.
+	Restore(process *Process, criuOpts *CriuOpts) error
+
+	// Destroys the container after killing all running processes.
+	//
+	// Any event registrations are removed before the container is destroyed.
+	// No error is returned if the container is already destroyed.
+	//
+	// errors:
+	// Systemerror - System error.
+	Destroy() error
+
+	// If the Container state is RUNNING or PAUSING, sets the Container state to PAUSING and pauses
+	// the execution of any user processes. Asynchronously, when the container finished being paused the
+	// state is changed to PAUSED.
+	// If the Container state is PAUSED, do nothing.
+	//
+	// errors:
+	// ContainerDestroyed - Container no longer exists,
+	// Systemerror - System error.
+	Pause() error
+
+	// If the Container state is PAUSED, resumes the execution of any user processes in the
+	// Container before setting the Container state to RUNNING.
+	// If the Container state is RUNNING, do nothing.
+	//
+	// errors:
+	// ContainerDestroyed - Container no longer exists,
+	// Systemerror - System error.
+	Resume() error
+
+	// NotifyOOM returns a read-only channel signaling when the container receives an OOM notification.
+	//
+	// errors:
+	// Systemerror - System error.
+	NotifyOOM() (<-chan struct{}, error)
+}