Add ELB Listener Rules object

resources/elbv2-listenerrule.go

@@ -0,0 +1,104 @@
+package resources
+
+import (
+	"fmt"
+
+	"github.com/aws/aws-sdk-go/aws/session"
+	"github.com/aws/aws-sdk-go/service/elbv2"
+	"github.com/rebuy-de/aws-nuke/v2/pkg/types"
+	"github.com/sirupsen/logrus"
+)
+
+var elbv2ListenerRulePageSize int64 = 400 // AWS has a limit of 100 rules per listener
+
+type ELBv2ListenerRule struct {
+	elb      *ELBv2LoadBalancer
+	rule     *elbv2.Rule
+	listener *elbv2.Listener
+}
+
+func init() {
+	register("ELBv2ListenerRule", ListELBv2ListenerRules)
+}
+
+func ListELBv2ListenerRules(sess *session.Session) ([]Resource, error) {
+	lbs, err := ListELBv2LoadBalancers(sess)
+	if err != nil {
+		return nil, err
+	}
+
+	resources := make([]Resource, 0)
+	for _, resLB := range lbs {
+		lb := resLB.(*ELBv2LoadBalancer)
+
+		err := lb.svc.DescribeListenersPages(
+			&elbv2.DescribeListenersInput{
+				LoadBalancerArn: lb.elb.LoadBalancerArn,
+			},
+			func(page *elbv2.DescribeListenersOutput, lastPage bool) bool {
+				for _, listener := range page.Listeners {
+					rules, err := lb.svc.DescribeRules(&elbv2.DescribeRulesInput{
+						ListenerArn: listener.ListenerArn,
+						PageSize:    &elbv2ListenerRulePageSize,
+					})
+					if err == nil {
+						for _, rule := range rules.Rules {
+							// Skip default rules as they cannot be deleted
+							if rule.IsDefault == nil && *rule.IsDefault {
+								continue
+							}
+
+							resources = append(resources, &ELBv2ListenerRule{
+								elb:      lb,
+								rule:     rule,
+								listener: listener,
+							})
+						}
+					} else {
+						logrus.
+							WithError(err).
+							WithField("listenerArn", listener.ListenerArn).
+							Error("Failed to list listener rules for listener")
+					}
+				}
+
+				return !lastPage
+			},
+		)
+		if err != nil {
+			logrus.
+				WithError(err).
+				WithField("loadBalancerArn", lb.elb.LoadBalancerArn).
+				Error("Failed to list listeners for load balancer")
+		}
+	}
+
+	return resources, nil
+}
+
+func (e *ELBv2ListenerRule) Remove() error {
+	_, err := e.elb.svc.DeleteRule(&elbv2.DeleteRuleInput{
+		RuleArn: e.rule.RuleArn,
+	})
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (e *ELBv2ListenerRule) Properties() types.Properties {
+	properties := types.NewProperties().
+		Set("ARN", e.rule.RuleArn)
+	properties.Set("ListenerARN", e.listener.ListenerArn)
+	properties.Set("LoadBalancer", e.elb.elb.LoadBalancerName)
+
+	for _, tagValue := range e.elb.tags {
+		properties.SetTag(tagValue.Key, tagValue.Value)
+	}
+	return properties
+}
+
+func (e *ELBv2ListenerRule) String() string {
+	return fmt.Sprintf("%s -> %s", e.elb.String(), *e.rule.RuleArn)
+}