func (c *Cluster) createContainer(config *cluster.ContainerConfig, name string, withImageAffinity bool, authConfig *dockerclient.AuthConfig) (*cluster.Container, error) {
c.scheduler.Lock()
// Ensure the name is available
if !c.checkNameUniqueness(name) {
c.scheduler.Unlock()
return nil, fmt.Errorf("Conflict: The name %s is already assigned. You have to delete (or rename) that container to be able to assign %s to a container again.", name, name)
}
swarmID := config.SwarmID()
if swarmID == "" {
// Associate a Swarm ID to the container we are creating.
swarmID = c.generateUniqueID()
config.SetSwarmID(swarmID)
}
if network := c.Networks().Get(config.HostConfig.NetworkMode); network != nil && network.Scope == "local" {
if !config.HaveNodeConstraint() {
config.AddConstraint("node==~" + network.Engine.Name)
}
config.HostConfig.NetworkMode = network.Name
}
if withImageAffinity {
config.AddAffinity("image==" + config.Image)
}
nodes, err := c.scheduler.SelectNodesForContainer(c.listNodes(), config)
if withImageAffinity {
config.RemoveAffinity("image==" + config.Image)
}
if err != nil {
c.scheduler.Unlock()
return nil, err
}
n := nodes[0]
engine, ok := c.engines[n.ID]
if !ok {
c.scheduler.Unlock()
return nil, fmt.Errorf("error creating container")
}
c.pendingContainers[swarmID] = &pendingContainer{
Name: name,
Config: config,
Engine: engine,
}
c.scheduler.Unlock()
container, err := engine.Create(config, name, true, authConfig)
c.scheduler.Lock()
delete(c.pendingContainers, swarmID)
c.scheduler.Unlock()
return container, err
}
