101 lines
3.3 KiB
Go
101 lines
3.3 KiB
Go
/*
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NOTE: The API is in flux and mainly not implemented. Proceed with caution until further notice.
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*/
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package libcontainer
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// A libcontainer container object.
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//
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// Each container is thread-safe within the same process. Since a container can
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// be destroyed by a separate process, any function may return that the container
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// was not found.
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type Container interface {
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// Returns the ID of the container
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ID() string
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// Returns the current run state of the container.
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//
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// errors:
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// ContainerDestroyed - Container no longer exists,
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// Systemerror - System error.
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RunState() (RunState, error)
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// Returns the current config of the container.
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Config() *Config
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// Returns the PIDs inside this container. The PIDs are in the namespace of the calling process.
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//
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// errors:
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// ContainerDestroyed - Container no longer exists,
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// Systemerror - System error.
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//
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// Some of the returned PIDs may no longer refer to processes in the Container, unless
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// the Container state is PAUSED in which case every PID in the slice is valid.
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Processes() ([]int, error)
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// Returns statistics for the container.
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//
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// errors:
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// ContainerDestroyed - Container no longer exists,
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// Systemerror - System error.
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Stats() (*ContainerStats, error)
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// Start a process inside the container. Returns the PID of the new process (in the caller process's namespace) and a channel that will return the exit status of the process whenever it dies.
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//
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// errors:
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// ContainerDestroyed - Container no longer exists,
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// ConfigInvalid - config is invalid,
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// ContainerPaused - Container is paused,
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// Systemerror - System error.
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StartProcess(config *ProcessConfig) (pid int, err error)
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// Destroys the container after killing all running processes.
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//
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// Any event registrations are removed before the container is destroyed.
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// No error is returned if the container is already destroyed.
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//
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// errors:
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// Systemerror - System error.
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Destroy() error
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// If the Container state is RUNNING or PAUSING, sets the Container state to PAUSING and pauses
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// the execution of any user processes. Asynchronously, when the container finished being paused the
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// state is changed to PAUSED.
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// If the Container state is PAUSED, do nothing.
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//
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// errors:
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// ContainerDestroyed - Container no longer exists,
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// Systemerror - System error.
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Pause() error
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// If the Container state is PAUSED, resumes the execution of any user processes in the
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// Container before setting the Container state to RUNNING.
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// If the Container state is RUNNING, do nothing.
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//
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// errors:
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// ContainerDestroyed - Container no longer exists,
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// Systemerror - System error.
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Resume() error
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// Signal sends the specified signal to a process owned by the container.
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//
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// errors:
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// ContainerDestroyed - Container no longer exists,
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// ContainerPaused - Container is paused,
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// Systemerror - System error.
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Signal(pid, signal int) error
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// Wait waits for the init process of the conatiner to die and returns it's exit status.
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//
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// errors:
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// ContainerDestroyed - Container no longer exists,
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// Systemerror - System error.
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Wait() (exitStatus int, err error)
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// WaitProcess waits on a process owned by the container.
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//
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// errors:
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// ContainerDestroyed - Container no longer exists,
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// Systemerror - System error.
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WaitProcess(pid int) (exitStatus int, err error)
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}
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