Example #1
0
// NewBackendPool returns a new backend pool.
// - cloud: implements BackendServices and syncs backends with a cloud provider
// - healthChecker: is capable of producing health checks for backends.
// - nodePool: implements NodePool, used to create/delete new instance groups.
// - namer: procudes names for backends.
// - ignorePorts: is a set of ports to avoid syncing/GCing.
// - resyncWithCloud: if true, periodically syncs with cloud resources.
func NewBackendPool(
	cloud BackendServices,
	healthChecker healthchecks.HealthChecker,
	nodePool instances.NodePool,
	namer *utils.Namer,
	ignorePorts []int64,
	resyncWithCloud bool) *Backends {

	ignored := []string{}
	for _, p := range ignorePorts {
		ignored = append(ignored, portKey(p))
	}
	backendPool := &Backends{
		cloud:         cloud,
		nodePool:      nodePool,
		healthChecker: healthChecker,
		namer:         namer,
		ignoredPorts:  sets.NewString(ignored...),
	}
	if !resyncWithCloud {
		backendPool.snapshotter = storage.NewInMemoryPool()
		return backendPool
	}
	backendPool.snapshotter = storage.NewCloudListingPool(
		func(i interface{}) (string, error) {
			bs := i.(*compute.BackendService)
			if !namer.NameBelongsToCluster(bs.Name) {
				return "", fmt.Errorf("Unrecognized name %v", bs.Name)
			}
			port, err := namer.BePort(bs.Name)
			if err != nil {
				return "", err
			}
			return port, nil
		},
		backendPool,
		30*time.Second,
	)
	return backendPool
}
Example #2
0
// NewNodePool creates a new node pool.
// - cloud: implements InstanceGroups, used to sync Kubernetes nodes with
//   members of the cloud InstanceGroup.
func NewNodePool(cloud InstanceGroups) NodePool {
	return &Instances{cloud, storage.NewInMemoryPool(), nil}
}