FIXUP: add a runner -- log success

Author: cbandy

cmd/postgres-operator/main.go

@@ -148,7 +148,7 @@ func main() {
 
 	k8s, err := kubernetes.NewDiscoveryRunner(cfg)
 	assertNoError(err)
-	assertNoError(k8s.Read())
+	assertNoError(k8s.Read(ctx))
 
 	log.Info("Connected to Kubernetes", "api", k8s.Version().String(), "openshift", k8s.IsOpenShift())
 

internal/kubernetes/discovery.go

@@ -24,6 +24,8 @@ type Version = version.Info
 // DiscoveryRunner implements [APIs] by reading from a Kubernetes API client.
 // Its methods are safe to call concurrently.
 type DiscoveryRunner struct {
+	// NOTE(tracing): The methods of [discovery.DiscoveryClient] do not take
+	// a Context so their API calls won't have a parent span.
 	Client interface {
 		ServerGroups() (*metav1.APIGroupList, error)
 		ServerResourcesForGroupVersion(string) (*metav1.APIResourceList, error)
@@ -100,11 +102,11 @@ func (r *DiscoveryRunner) IsOpenShift() bool {
 func (r *DiscoveryRunner) NeedLeaderElection() bool { return false }
 
 // Read fetches available APIs from Kubernetes.
-func (r *DiscoveryRunner) Read() error {
-	return errors.Join(r.readAPIs(), r.readVersion())
+func (r *DiscoveryRunner) Read(ctx context.Context) error {
+	return errors.Join(r.readAPIs(ctx), r.readVersion())
 }
 
-func (r *DiscoveryRunner) readAPIs() error {
+func (r *DiscoveryRunner) readAPIs(ctx context.Context) error {
 	// Build an index of the APIs we want to know about.
 	wantAPIs := make(map[string]map[string]sets.Set[string])
 	for _, want := range r.relevant {
@@ -160,6 +162,10 @@ func (r *DiscoveryRunner) readAPIs() error {
 	r.have.APISet = haveAPIs
 	r.have.Unlock()
 
+	r.have.RLock()
+	defer r.have.RUnlock()
+	logging.FromContext(ctx).V(1).Info("Found APIs", "index_size", r.have.APISet.Len())
+
 	return nil
 }
 
@@ -181,11 +187,12 @@ func (r *DiscoveryRunner) Start(ctx context.Context) error {
 	defer ticker.Stop()
 
 	log := logging.FromContext(ctx).WithValues("controller", "kubernetes")
+	ctx = logging.NewContext(ctx, log)
 
 	for {
 		select {
 		case <-ticker.C:
-			if err := r.Read(); err != nil {
+			if err := r.Read(ctx); err != nil {
 				log.Error(err, "Unable to detect Kubernetes APIs")
 			}
 		case <-ctx.Done():

internal/kubernetes/discovery_test.go

@@ -24,6 +24,7 @@ func TestDiscoveryRunnerInterfaces(t *testing.T) {
 }
 
 func TestDiscoveryRunnerAPIs(t *testing.T) {
+	ctx := context.Background()
 	cfg, _ := require.Kubernetes2(t)
 	require.ParallelCapacity(t, 0)
 
@@ -32,7 +33,7 @@ func TestDiscoveryRunnerAPIs(t *testing.T) {
 
 	// Search for an API that should always exist.
 	runner.relevant = append(runner.relevant, API{Kind: "Pod"})
-	assert.NilError(t, runner.readAPIs())
+	assert.NilError(t, runner.readAPIs(ctx))
 
 	assert.Assert(t, runner.Has(API{Kind: "Pod"}))
 	assert.Assert(t, runner.HasAll(API{Kind: "Pod"}, API{Kind: "Secret"}))