daemon/cluster/executor/container/errors.go

package container

import (
	"errors"
)

var (
	// ErrImageRequired returned if a task is missing the image definition.
	ErrImageRequired = errors.New("dockerexec: image required")

	// ErrContainerDestroyed returned when a container is prematurely destroyed
	// during a wait call.
	ErrContainerDestroyed = errors.New("dockerexec: container destroyed")

	// ErrContainerUnhealthy returned if controller detects the health check failure
	ErrContainerUnhealthy = errors.New("dockerexec: unhealthy container")
)