Fill Role names in kops-controller-config instead of instance profile names when it is specified

The role names are checked in node bootstrap.
If profile names are provided, bootstrap will fail.
Because profile name and role name do not always mactch in AWS IAM

pkg/testutils/BUILD.bazel

@@ -37,6 +37,7 @@ go_library(
         "//vendor/github.com/aws/aws-sdk-go/aws:go_default_library",
         "//vendor/github.com/aws/aws-sdk-go/service/ec2:go_default_library",
         "//vendor/github.com/aws/aws-sdk-go/service/elbv2:go_default_library",
+        "//vendor/github.com/aws/aws-sdk-go/service/iam:go_default_library",
         "//vendor/github.com/aws/aws-sdk-go/service/route53:go_default_library",
         "//vendor/github.com/gophercloud/gophercloud/openstack/compute/v2/flavors:go_default_library",
         "//vendor/github.com/gophercloud/gophercloud/openstack/dns/v2/zones:go_default_library",

pkg/testutils/integrationtestharness.go

@@ -26,6 +26,7 @@ import (
 	"github.com/aws/aws-sdk-go/aws"
 	"github.com/aws/aws-sdk-go/service/ec2"
 	"github.com/aws/aws-sdk-go/service/elbv2"
+	"github.com/aws/aws-sdk-go/service/iam"
 	"github.com/aws/aws-sdk-go/service/route53"
 	"github.com/gophercloud/gophercloud/openstack/compute/v2/flavors"
 	"github.com/gophercloud/gophercloud/openstack/dns/v2/zones"
@@ -256,6 +257,17 @@ func (h *IntegrationTestHarness) SetupMockAWS() *awsup.MockAWSCloud {
 		Name: aws.String("my-external-tg-3"),
 	})
 
+	mockIAM.CreateRole(&iam.CreateRoleInput{
+		RoleName: aws.String("kops-custom-node-role"),
+	})
+	mockIAM.CreateInstanceProfile(&iam.CreateInstanceProfileInput{
+		InstanceProfileName: aws.String("kops-custom-node-role"),
+	})
+	mockIAM.AddRoleToInstanceProfile(&iam.AddRoleToInstanceProfileInput{
+		InstanceProfileName: aws.String("kops-custom-node-role"),
+		RoleName:            aws.String("kops-custom-node-role"),
+	})
+
 	return cloud
 }
 

upup/pkg/fi/cloudup/apply_cluster.go

@@ -492,6 +492,7 @@ func (c *ApplyClusterCmd) Run(ctx context.Context) error {
 
 	tf := &TemplateFunctions{
 		KopsModelContext: *modelContext,
+		cloud:            cloud,
 	}
 
 	{

upup/pkg/fi/cloudup/awsup/aws_cloud.go

@@ -1751,3 +1751,18 @@ func (c *awsCloudImplementation) AccountInfo() (string, string, error) {
 	}
 	return arn.AccountID, arn.Partition, nil
 }
+
+// GetRolesInInstanceProfile return role names which are associated with the instance profile specified by profileName.
+func GetRolesInInstanceProfile(c AWSCloud, profileName string) ([]string, error) {
+	output, err := c.IAM().GetInstanceProfile(&iam.GetInstanceProfileInput{
+		InstanceProfileName: aws.String(profileName),
+	})
+	if err != nil {
+		return nil, err
+	}
+	var roleNames []string
+	for _, role := range output.InstanceProfile.Roles {
+		roleNames = append(roleNames, *role.RoleName)
+	}
+	return roleNames, nil
+}

upup/pkg/fi/cloudup/bootstrapchannelbuilder_test.go

@@ -154,6 +154,7 @@ func runChannelBuilderTest(t *testing.T, key string, addonManifests []string) {
 
 	tf := &TemplateFunctions{
 		KopsModelContext: kopsModel,
+		cloud:            cloud,
 	}
 	tf.AddTo(templates.TemplateFunctions, secretStore)
 

upup/pkg/fi/cloudup/template_functions.go

@@ -59,6 +59,8 @@ import (
 // TemplateFunctions provides a collection of methods used throughout the templates
 type TemplateFunctions struct {
 	model.KopsModelContext
+
+	cloud fi.Cloud
 }
 
 // AddTo defines the available functions we can use in our YAML models.
@@ -445,9 +447,24 @@ func (tf *TemplateFunctions) KopsControllerConfig() (string, error) {
 				if ig.Spec.Role == kops.InstanceGroupRoleNode {
 					profile, err := tf.LinkToIAMInstanceProfile(ig)
 					if err != nil {
-						return "", fmt.Errorf("getting role for ig %s: %v", ig.Name, err)
+						return "", fmt.Errorf("getting profile for ig %s: %v", ig.Name, err)
+					}
+					// The IAM Instance Profile has not been created at this point if it is not specified.
+					// Because the IAM Instance Profile and the IAM Role are created in IAMModelBuilder tasks.
+					// Therefore, the IAM Role associated with IAM Instance Profile is acquired only when it is not specified.
+					if ig.Spec.IAM != nil && ig.Spec.IAM.Profile != nil {
+						c := tf.cloud.(awsup.AWSCloud)
+						roles, err := awsup.GetRolesInInstanceProfile(c, *profile.Name)
+						if err != nil {
+							return "", fmt.Errorf("getting role from profile %s: %v", *profile.Name, err)
+						}
+						nodesRoles.Insert(roles...)
+					} else {
+						// When the IAM Instance Profile is not specified, IAM Instance Profile is created by kOps.
+						// In this case, the IAM Instance Profile name and IAM Role name are same.
+						// So there is no problem even if IAM Instance Profile name is inserted as role name in nodesRoles.
+						nodesRoles.Insert(*profile.Name)
 					}
-					nodesRoles.Insert(*profile.Name)
 				}
 			}
 			config.Server.Provider.AWS = &awsup.AWSVerifierOptions{