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您好，我已经在我的 EKS 集群上安装了 istio，我正在尝试链接到外部 DNS 并动态创建 dns 记录，我遇到了这个问题

RRSet of type TXT with DNS name pr-1667.eks.comrade.com. is not permitted because a conflicting RRSet of type CNAME with the same DNS name already exists in zone eks.comrade.com.]\n\tstatus code: 400, request id: 9a4bfe6b-7c84..."

这是我的虚拟服务

apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: app-waf-entrypoint
  annotations:
    external-dns.alpha.kubernetes.io/target: {{substr 8 22 .Values.comrade.api.appDomain }}
    external-dns.alpha.kubernetes.io/external: 'true'
spec:
  hosts:
    - "{{ .Values.comrade.api.appDomain }}"
  gateways:
    - comrade-istio-gateway
  http:
    - route:
        - destination:
            host: app-waf-entrypoint.{{ .Values.comrade.namespace }}.svc.cluster.local
            port:
                number: {{ .Values.comrade.waf.port }}

这是我的外部 DNS 清单

apiVersion: apps/v1
kind: Deployment
metadata:
  name: external-dns
spec:
  strategy:
    type: Recreate
  selector:
    matchLabels:
      app: external-dns
  template:
    metadata:
      labels:
        app: external-dns
    spec:
      serviceAccountName: external-dns
      containers:
      - name: external-dns
        image: k8s.gcr.io/external-dns/external-dns:v0.7.6
        args:
        - --source=service
        - --source=ingress
        - --source=istio-virtualservice # or both
        - --domain-filter=eks.myapp.com # will make ExternalDNS see only the hosted zones matching provided domain, omit to process all available hosted zones
        - --provider=aws
        - --policy=sync
        - --aws-zone-type=public # only look at public hosted zones (valid values are public, private or no value for both)
        - --registry=txt
        - --txt-owner-id=######
      securityContext:
        fsGroup: 65534 # For ExternalDNS to be able to read Kubernetes and AWS token files
---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: external-dns
  # If you're using Amazon EKS with IAM Roles for Service Accounts, specify the following annotation.
  # Otherwise, you may safely omit it.
  annotations:
    # Substitute your account ID and IAM service role name below.
    eks.amazonaws.com/role-arn: #########
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: external-dns
rules:
- apiGroups: [""]
  resources: ["services","endpoints","pods"]
  verbs: ["get","watch","list"]
- apiGroups: ["extensions","networking.k8s.io"]
  resources: ["ingresses"]
  verbs: ["get","watch","list"]
- apiGroups: [""]
  resources: ["nodes"]
  verbs: ["list","watch"]
- apiGroups: ["networking.istio.io"]
  resources: ["virtualservices"]
  verbs: ["get","watch","list"]
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: external-dns-viewer
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: external-dns
subjects:
- kind: ServiceAccount
  name: external-dns
  namespace: default

最后这是我的 istio 网关

apiVersion: networking.istio.io/v1alpha3
kind: Gateway
metadata:
  name: comrade-istio-gateway
spec:
  selector:
    istio: ingressgateway
  servers:
  - port:
      number: 80
      name: http
      protocol: HTTP
    hosts:
        - "{{ .Values.comrade.api.appDomain }}"

我在入口处使用相同的服务并且它工作得很好，所以我不太确定，我在我的托管区域下看不到任何东西，比如已经创建的记录或任何东西。

提前致谢。

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