// NewClusterManager creates a cluster manager for shared resources.
// - namer: is the namer used to tag cluster wide shared resources.
// - defaultBackendNodePort: is the node port of glbc's default backend. This is
// the kubernetes Service that serves the 404 page if no urls match.
// - defaultHealthCheckPath: is the default path used for L7 health checks, eg: "/healthz".
func NewClusterManager(
configFilePath string,
namer *utils.Namer,
defaultBackendNodePort int64,
defaultHealthCheckPath string) (*ClusterManager, error) {
// TODO: Make this more resilient. Currently we create the cloud client
// and pass it through to all the pools. This makes unittesting easier.
// However if the cloud client suddenly fails, we should try to re-create it
// and continue.
var cloud *gce.GCECloud
if configFilePath != "" {
glog.Infof("Reading config from path %v", configFilePath)
config, err := os.Open(configFilePath)
if err != nil {
return nil, err
}
defer config.Close()
cloud = getGCEClient(config)
glog.Infof("Successfully loaded cloudprovider using config %q", configFilePath)
} else {
// While you might be tempted to refactor so we simply assing nil to the
// config and only invoke getGCEClient once, that will not do the right
// thing because a nil check against an interface isn't true in golang.
cloud = getGCEClient(nil)
glog.Infof("Created GCE client without a config file")
}
// Names are fundamental to the cluster, the uid allocator makes sure names don't collide.
cluster := ClusterManager{ClusterNamer: namer}
// NodePool stores GCE vms that are in this Kubernetes cluster.
cluster.instancePool = instances.NewNodePool(cloud)
// BackendPool creates GCE BackendServices and associated health checks.
healthChecker := healthchecks.NewHealthChecker(cloud, defaultHealthCheckPath, cluster.ClusterNamer)
// Loadbalancer pool manages the default backend and its health check.
defaultBackendHealthChecker := healthchecks.NewHealthChecker(cloud, "/healthz", cluster.ClusterNamer)
cluster.healthCheckers = []healthchecks.HealthChecker{healthChecker, defaultBackendHealthChecker}
// TODO: This needs to change to a consolidated management of the default backend.
cluster.backendPool = backends.NewBackendPool(
cloud, healthChecker, cluster.instancePool, cluster.ClusterNamer, []int64{defaultBackendNodePort}, true)
defaultBackendPool := backends.NewBackendPool(
cloud, defaultBackendHealthChecker, cluster.instancePool, cluster.ClusterNamer, []int64{}, false)
cluster.defaultBackendNodePort = defaultBackendNodePort
// L7 pool creates targetHTTPProxy, ForwardingRules, UrlMaps, StaticIPs.
cluster.l7Pool = loadbalancers.NewLoadBalancerPool(
cloud, defaultBackendPool, defaultBackendNodePort, cluster.ClusterNamer)
cluster.firewallPool = firewalls.NewFirewallPool(cloud, cluster.ClusterNamer)
return &cluster, nil
}
// NewFakeClusterManager creates a new fake ClusterManager.
func NewFakeClusterManager(clusterName string) *fakeClusterManager {
fakeLbs := loadbalancers.NewFakeLoadBalancers(clusterName)
fakeBackends := backends.NewFakeBackendServices()
fakeIGs := instances.NewFakeInstanceGroups(sets.NewString())
fakeHCs := healthchecks.NewFakeHealthChecks()
namer := utils.NewNamer(clusterName)
nodePool := instances.NewNodePool(fakeIGs)
nodePool.Init(&instances.FakeZoneLister{[]string{"zone-a"}})
healthChecker := healthchecks.NewHealthChecker(fakeHCs, "/", namer)
healthChecker.Init(&healthchecks.FakeHealthCheckGetter{nil})
backendPool := backends.NewBackendPool(
fakeBackends,
healthChecker, nodePool, namer, []int64{}, false)
l7Pool := loadbalancers.NewLoadBalancerPool(
fakeLbs,
// TODO: change this
backendPool,
testDefaultBeNodePort,
namer,
)
frPool := firewalls.NewFirewallPool(firewalls.NewFakeFirewallRules(), namer)
cm := &ClusterManager{
ClusterNamer: namer,
instancePool: nodePool,
backendPool: backendPool,
l7Pool: l7Pool,
firewallPool: frPool,
}
return &fakeClusterManager{cm, fakeLbs, fakeBackends, fakeIGs}
}
func newBackendPool(f BackendServices, fakeIGs instances.InstanceGroups, syncWithCloud bool) BackendPool {
namer := &utils.Namer{}
nodePool := instances.NewNodePool(fakeIGs)
nodePool.Init(&instances.FakeZoneLister{Zones: []string{defaultZone}})
healthChecks := healthchecks.NewHealthChecker(healthchecks.NewFakeHealthChecks(), "/", namer)
healthChecks.Init(&healthchecks.FakeHealthCheckGetter{DefaultHealthCheck: nil})
return NewBackendPool(
f, healthChecks, nodePool, namer, []int64{}, syncWithCloud)
}
func newFakeLoadBalancerPool(f LoadBalancers, t *testing.T) LoadBalancerPool {
fakeBackends := backends.NewFakeBackendServices()
fakeIGs := instances.NewFakeInstanceGroups(sets.NewString())
fakeHCs := healthchecks.NewFakeHealthChecks()
namer := &utils.Namer{}
healthChecker := healthchecks.NewHealthChecker(fakeHCs, "/", namer)
healthChecker.Init(&healthchecks.FakeHealthCheckGetter{nil})
nodePool := instances.NewNodePool(fakeIGs)
nodePool.Init(&instances.FakeZoneLister{[]string{defaultZone}})
backendPool := backends.NewBackendPool(
fakeBackends, healthChecker, nodePool, namer, []int64{}, false)
return NewLoadBalancerPool(f, backendPool, testDefaultBeNodePort, namer)
}