不会为入口资源创建 DNS 记录

Question

我的配置：

apiVersion: v1
kind: ServiceAccount
metadata:
  name: external-dns
  namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1beta1
kind: ClusterRole
metadata:
  name: external-dns
rules:
- apiGroups: [""]
  resources: ["services"]
  verbs: ["get","watch","list"]
- apiGroups: [""]
  resources: ["pods"]
  verbs: ["get","watch","list"]
- apiGroups: ["extensions"] 
  resources: ["ingresses"] 
  verbs: ["get","watch","list"]
- apiGroups: [""]
  resources: ["nodes"]
  verbs: ["list"]
- apiGroups: ["networking.istio.io"]
  resources: ["gateways"]
  verbs: ["get","watch","list"]
---
apiVersion: rbac.authorization.k8s.io/v1beta1
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: kube-system
---
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: external-dns
  namespace: kube-system
spec:
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: external-dns
    spec:
      serviceAccountName: external-dns
      containers:
      - name: external-dns
        image: registry.opensource.zalan.do/teapot/external-dns:latest
        args:
        - --source=ingress
        - --source=istio-gateway
        - --domain-filter=xxx
        - --policy=upsert-only
        - --provider=azure
        volumeMounts:
        - name: azure-config-file
          mountPath: /etc/kubernetes
          readOnly: true
      volumes:
      - name: azure-config-file
        secret:
          secretName: azuredns-config

正在解析 Istio 网关对象并正在创建 DNS 记录（这发生在不久前，我现在在日志中看不到任何内容）。出于某种原因，入口记录未被解析。我试过添加 --source=service 并使用以下注释服务：external-dns.alpha.kubernetes.io/hostname: my.host.name，也没有效果。

有什么想法吗？这看起来不错，但不知何故不起作用。 Ingress 工作，cert-manager 创建证书，如果我手动创建 DNS 记录 ingress 工作正常。

Answer 1

我建议运行ning https://github.com/kubernetes-incubator/external-dns 具有适当的云提供商角色，例如AWS 中的 IAM 角色，允许修改 Route53 记录。

对于 Azure：https://github.com/kubernetes-incubator/external-dns/blob/master/docs/tutorials/azure.md

当你运行它时，确保你启用了入口源：https://github.com/helm/charts/blob/master/stable/external-dns/values.yaml#L8-L12

它具有调试日志记录功能，因此您可以准确检查您的记录发生了什么。

Answer 2

问题是由于 nginx-ingress 没有将其 IP 地址发布到入口资源状态字段。 GH 问题：https://github.com/kubernetes-incubator/external-dns/issues/456

--log-level=debug

帮助确定了问题。通过将此添加到 nginx 入口控制器部署来修复：

- --publish-service=kube-system/nginx-ingress-controller
- --update-status

不会为入口资源创建 DNS 记录

DNS records are not created for ingress resources

azure

kubernetes

azure-aks