github.com/sams1990/dockerrepo@v17.12.1-ce-rc2+incompatible/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/agent/exec"
     6  	"github.com/docker/swarmkit/api"
     7  	"golang.org/x/net/context"
     8  )
     9  
    10  // networkAttacherController implements agent.Controller against docker's API.
    11  //
    12  // networkAttacherController manages the lifecycle of network
    13  // attachment of a docker unmanaged container managed as a task from
    14  // agent point of view. It provides network attachment information to
    15  // the unmanaged container for it to attach to the network and run.
    16  type networkAttacherController struct {
    17  	backend executorpkg.Backend
    18  	task    *api.Task
    19  	adapter *containerAdapter
    20  	closed  chan struct{}
    21  }
    22  
    23  func newNetworkAttacherController(b executorpkg.Backend, task *api.Task, node *api.NodeDescription, dependencies exec.DependencyGetter) (*networkAttacherController, error) {
    24  	adapter, err := newContainerAdapter(b, task, node, dependencies)
    25  	if err != nil {
    26  		return nil, err
    27  	}
    28  
    29  	return &networkAttacherController{
    30  		backend: b,
    31  		task:    task,
    32  		adapter: adapter,
    33  		closed:  make(chan struct{}),
    34  	}, nil
    35  }
    36  
    37  func (nc *networkAttacherController) Update(ctx context.Context, t *api.Task) error {
    38  	return nil
    39  }
    40  
    41  func (nc *networkAttacherController) Prepare(ctx context.Context) error {
    42  	// Make sure all the networks that the task needs are created.
    43  	return nc.adapter.createNetworks(ctx)
    44  }
    45  
    46  func (nc *networkAttacherController) Start(ctx context.Context) error {
    47  	return nc.adapter.networkAttach(ctx)
    48  }
    49  
    50  func (nc *networkAttacherController) Wait(pctx context.Context) error {
    51  	ctx, cancel := context.WithCancel(pctx)
    52  	defer cancel()
    53  
    54  	return nc.adapter.waitForDetach(ctx)
    55  }
    56  
    57  func (nc *networkAttacherController) Shutdown(ctx context.Context) error {
    58  	return nil
    59  }
    60  
    61  func (nc *networkAttacherController) Terminate(ctx context.Context) error {
    62  	return nil
    63  }
    64  
    65  func (nc *networkAttacherController) Remove(ctx context.Context) error {
    66  	// Try removing the network referenced in this task in case this
    67  	// task is the last one referencing it
    68  	return nc.adapter.removeNetworks(ctx)
    69  }
    70  
    71  func (nc *networkAttacherController) Close() error {
    72  	return nil
    73  }