feat(configmap-server): tolerate load errors

Tolerate load errors and use EmptyQuery when table loading fails.

Author: njhale

cmd/configmap-server/main.go

@@ -17,6 +17,7 @@ import (
 	"github.com/operator-framework/operator-registry/pkg/api"
 	health "github.com/operator-framework/operator-registry/pkg/api/grpc_health_v1"
 	"github.com/operator-framework/operator-registry/pkg/lib/log"
+	"github.com/operator-framework/operator-registry/pkg/registry"
 	"github.com/operator-framework/operator-registry/pkg/server"
 	"github.com/operator-framework/operator-registry/pkg/sqlite"
 )
@@ -109,18 +110,22 @@ func runCmdFunc(cmd *cobra.Command, args []string) error {
 		logger.WithError(err).Warn("permissive mode enabled")
 	}
 
-	store, err := sqlite.NewSQLLiteQuerier(dbName)
+	var store registry.Query
+	store, err = sqlite.NewSQLLiteQuerier(dbName)
 	if err != nil {
-		logger.Fatalf("failed to load db: %s", err)
+		logger.WithError(err).Warnf("failed to load db")
+	}
+	if store == nil {
+		store = registry.NewEmptyQuerier()
 	}
 
 	// sanity check that the db is available
 	tables, err := store.ListTables(context.TODO())
 	if err != nil {
-		logger.Fatalf("couldn't list tables in db, incorrect config: %s", err)
+		logger.WithError(err).Warnf("couldn't list tables in db")
 	}
 	if len(tables) == 0 {
-		logger.Fatal("no tables found in db")
+		logger.Warn("no tables found in db")
 	}
 
 	lis, err := net.Listen("tcp", ":"+port)