github.com/vieux/docker@v0.6.3-0.20161004191708-e097c2a938c7/daemon/cluster/executor/container/attachment.go (about)

     1  package container
     2  
     3  import (
     4  	executorpkg "github.com/docker/docker/daemon/cluster/executor"
     5  	"github.com/docker/swarmkit/api"
     6  	"golang.org/x/net/context"
     7  )
     8  
     9  // networkAttacherController implements agent.Controller against docker's API.
    10  //
    11  // networkAttacherController manages the lifecycle of network
    12  // attachment of a docker unmanaged container managed as a task from
    13  // agent point of view. It provides network attachment information to
    14  // the unmanaged container for it to attach to the network and run.
    15  type networkAttacherController struct {
    16  	backend executorpkg.Backend
    17  	task    *api.Task
    18  	adapter *containerAdapter
    19  	closed  chan struct{}
    20  }
    21  
    22  func newNetworkAttacherController(b executorpkg.Backend, task *api.Task) (*networkAttacherController, error) {
    23  	adapter, err := newContainerAdapter(b, task)
    24  	if err != nil {
    25  		return nil, err
    26  	}
    27  
    28  	return &networkAttacherController{
    29  		backend: b,
    30  		task:    task,
    31  		adapter: adapter,
    32  		closed:  make(chan struct{}),
    33  	}, nil
    34  }
    35  
    36  func (nc *networkAttacherController) Update(ctx context.Context, t *api.Task) error {
    37  	return nil
    38  }
    39  
    40  func (nc *networkAttacherController) Prepare(ctx context.Context) error {
    41  	// Make sure all the networks that the task needs are created.
    42  	if err := nc.adapter.createNetworks(ctx); err != nil {
    43  		return err
    44  	}
    45  
    46  	return nil
    47  }
    48  
    49  func (nc *networkAttacherController) Start(ctx context.Context) error {
    50  	return nc.adapter.networkAttach(ctx)
    51  }
    52  
    53  func (nc *networkAttacherController) Wait(pctx context.Context) error {
    54  	ctx, cancel := context.WithCancel(pctx)
    55  	defer cancel()
    56  
    57  	return nc.adapter.waitForDetach(ctx)
    58  }
    59  
    60  func (nc *networkAttacherController) Shutdown(ctx context.Context) error {
    61  	return nil
    62  }
    63  
    64  func (nc *networkAttacherController) Terminate(ctx context.Context) error {
    65  	return nil
    66  }
    67  
    68  func (nc *networkAttacherController) Remove(ctx context.Context) error {
    69  	// Try removing the network referenced in this task in case this
    70  	// task is the last one referencing it
    71  	if err := nc.adapter.removeNetworks(ctx); err != nil {
    72  		return err
    73  	}
    74  
    75  	return nil
    76  }
    77  
    78  func (nc *networkAttacherController) Close() error {
    79  	return nil
    80  }