Add resource name validation

Signed-off-by: Per Goncalves da Silva <[email protected]>

Author: Per Goncalves da Silva

internal/operator-controller/rukpak/render/validators/validator.go

@@ -4,6 +4,7 @@ import (
 	"cmp"
 	"errors"
 	"fmt"
+	"k8s.io/apimachinery/pkg/util/validation"
 	"maps"
 	"slices"
 	"strings"
@@ -49,6 +50,25 @@ func CheckDeploymentSpecUniqueness(rv1 *render.RegistryV1) []error {
 	return errs
 }
 
+// CheckDeploymentNameIsDNS1123SubDomain checks each deployment strategy spec name complies with the Kubernetes
+// resource naming conversions
+func CheckDeploymentNameIsDNS1123SubDomain(rv1 *render.RegistryV1) []error {
+	deploymentNameErrMap := map[string][]string{}
+	for _, dep := range rv1.CSV.Spec.InstallStrategy.StrategySpec.DeploymentSpecs {
+		errs := validation.IsDNS1123Subdomain(dep.Name)
+		if len(errs) > 0 {
+			slices.Sort(errs)
+			deploymentNameErrMap[dep.Name] = errs
+		}
+	}
+
+	var errs []error
+	for _, dep := range slices.Sorted(maps.Keys(deploymentNameErrMap)) {
+		errs = append(errs, fmt.Errorf("invalid cluster service version strategy deployment name '%s': %s", dep, strings.Join(deploymentNameErrMap[dep], ", ")))
+	}
+	return errs
+}
+
 // CheckOwnedCRDExistence checks bundle owned custom resource definitions declared in the csv exist in the bundle
 func CheckOwnedCRDExistence(rv1 *render.RegistryV1) []error {
 	crdsNames := sets.Set[string]{}