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use service lister instead of endpoints cache to get port from portName
Signed-off-by: Jan Wozniak <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,77 @@ | ||
| package k8s | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "sync" | ||
|
|
||
| "github.com/go-logr/logr" | ||
| v1 "k8s.io/api/core/v1" | ||
| metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" | ||
| "k8s.io/client-go/informers" | ||
| "k8s.io/client-go/kubernetes" | ||
| listerv1 "k8s.io/client-go/listers/core/v1" | ||
| ) | ||
|
|
||
| // ServiceCache is an interface for caching service objects | ||
| type ServiceCache interface { | ||
| // Get gets a service with the given namespace and name from the cache | ||
| // If the service doesn't exist in the cache, it will be fetched from the API server | ||
| Get(ctx context.Context, namespace, name string) (*v1.Service, error) | ||
| } | ||
|
|
||
| // InformerBackedServicesCache is a cache of services backed by a shared informer | ||
| type InformerBackedServicesCache struct { | ||
| lggr logr.Logger | ||
| cl kubernetes.Interface | ||
| svcLister listerv1.ServiceLister | ||
| } | ||
|
|
||
| // FakeServiceCache is a fake implementation of a ServiceCache for testing | ||
| type FakeServiceCache struct { | ||
| current map[string]v1.Service | ||
| mut sync.RWMutex | ||
| } | ||
|
|
||
| // NewInformerBackedServiceCache creates a new InformerBackedServicesCache | ||
| func NewInformerBackedServiceCache(lggr logr.Logger, cl kubernetes.Interface, factory informers.SharedInformerFactory) *InformerBackedServicesCache { | ||
| return &InformerBackedServicesCache{ | ||
| lggr: lggr.WithName("InformerBackedServicesCache"), | ||
| cl: cl, | ||
| svcLister: factory.Core().V1().Services().Lister(), | ||
| } | ||
| } | ||
|
|
||
| // Get gets a service with the given namespace and name from the cache and as a fallback from the API server | ||
| func (c *InformerBackedServicesCache) Get(ctx context.Context, namespace, name string) (*v1.Service, error) { | ||
| svc, err := c.svcLister.Services(namespace).Get(name) | ||
| if err == nil { | ||
| c.lggr.V(1).Info("Service found in cache", "namespace", namespace, "name", name) | ||
| return svc, nil | ||
| } | ||
| c.lggr.V(1).Info("Service not found in cache, fetching from API server", "namespace", namespace, "name", name, "error", err) | ||
| return c.cl.CoreV1().Services(namespace).Get(ctx, name, metav1.GetOptions{}) | ||
| } | ||
|
|
||
| // NewFakeServiceCache creates a new FakeServiceCache | ||
| func NewFakeServiceCache() *FakeServiceCache { | ||
| return &FakeServiceCache{current: make(map[string]v1.Service)} | ||
| } | ||
|
|
||
| // Get gets a service with the given namespace and name from the cache | ||
| func (c *FakeServiceCache) Get(ctx context.Context, namespace, name string) (*v1.Service, error) { | ||
| c.mut.RLock() | ||
| defer c.mut.RUnlock() | ||
| svc, ok := c.current[key(namespace, name)] | ||
| if !ok { | ||
| return nil, fmt.Errorf("service not found") | ||
| } | ||
| return &svc, nil | ||
| } | ||
|
|
||
| // Add adds a service to the cache | ||
| func (c *FakeServiceCache) Add(svc v1.Service) { | ||
| c.mut.Lock() | ||
| defer c.mut.Unlock() | ||
| c.current[key(svc.Namespace, svc.Name)] = svc | ||
| } |
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