Log config contexts from nomos commands at -v=4 (#982)

Add logging to help debug nomos commands run in various environments.

cmd/nomos/status/client.go

@@ -462,6 +462,16 @@ func ClusterClients(ctx context.Context, contexts []string) (map[string]*Cluster
 	}
 	configs = filterConfigs(contexts, configs)
 
+	if klog.V(4).Enabled() {
+		// Sort contexts for consistent ordering in the log
+		var contexts []string
+		for ctxName := range configs {
+			contexts = append(contexts, ctxName)
+		}
+		sort.Strings(contexts)
+		klog.V(4).Infof("Config contexts after filtering: %s", strings.Join(contexts, ", "))
+	}
+
 	var mapMutex sync.Mutex
 	var wg sync.WaitGroup
 	clientMap := make(map[string]*ClusterClient)

pkg/client/restconfig/config.go

@@ -19,13 +19,15 @@ import (
 	"os"
 	"os/user"
 	"path/filepath"
+	"sort"
 	"strings"
 	"time"
 
 	"github.com/pkg/errors"
 	"k8s.io/client-go/rest"
 	"k8s.io/client-go/tools/clientcmd"
 	clientcmdapi "k8s.io/client-go/tools/clientcmd/api"
+	"k8s.io/klog/v2"
 )
 
 const kubectlConfigPath = ".kube/config"
@@ -95,9 +97,23 @@ func AllKubectlConfigs(timeout time.Duration) (map[string]*rest.Config, error) {
 	if err != nil {
 		return nil, err
 	}
+	if len(apiCfg.Contexts) == 0 {
+		return map[string]*rest.Config{}, nil
+	}
+
+	if klog.V(4).Enabled() {
+		// Sort contexts for consistent ordering in the log
+		var contexts []string
+		for ctxName := range apiCfg.Contexts {
+			contexts = append(contexts, ctxName)
+		}
+		sort.Strings(contexts)
+		klog.V(4).Infof("Found config contexts: %s", strings.Join(contexts, ", "))
+		klog.V(4).Infof("Current config context: %s", apiCfg.CurrentContext)
+	}
 
 	var badConfigs []string
-	configs := map[string]*rest.Config{}
+	configs := make(map[string]*rest.Config, len(apiCfg.Contexts))
 	for ctxName := range apiCfg.Contexts {
 		cfg := clientcmd.NewNonInteractiveDeferredLoadingClientConfig(
 			rules, &clientcmd.ConfigOverrides{CurrentContext: ctxName})
@@ -115,9 +131,8 @@ func AllKubectlConfigs(timeout time.Duration) (map[string]*rest.Config, error) {
 		configs[ctxName] = restCfg
 	}
 
-	var cfgErrs error
 	if len(badConfigs) > 0 {
-		cfgErrs = fmt.Errorf("failed to build configs:\n%s", strings.Join(badConfigs, "\n"))
+		return configs, fmt.Errorf("failed to build configs:\n%s", strings.Join(badConfigs, "\n"))
 	}
-	return configs, cfgErrs
+	return configs, nil
 }