kubernetes部署-Kubernetes DNS(九)

最新推荐文章于 2025-06-03 03:17:50 发布

黑白企鹅

最新推荐文章于 2025-06-03 03:17:50 发布

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分类专栏： k8s 文章标签： k8s kubernetes dns

本文链接：https://blog.youkuaiyun.com/u013726175/article/details/88173381

本文介绍了如何在Kubernetes中部署DNS，通过创建yaml文件启动DNS服务，检查pod状态确保其正常运行，接着创建新pod进行DNS解析验证，确保服务能正确映射到CLUSTER-IP。

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kubernetes部署-Kubernetes DNS

部署-Kubernetes DNS

创建DNS 用来自动对应主机和集群IP

直接创建yaml文件来创建dns

apiVersion: v1
kind: Service
metadata:
  name: kube-dns
  namespace: kube-system
  labels:
    k8s-app: kube-dns
    kubernetes.io/cluster-service: "true"
    addonmanager.kubernetes.io/mode: Reconcile
    kubernetes.io/name: "KubeDNS"
spec:
  selector:
    k8s-app: kube-dns
  clusterIP: 10.0.0.2    #我们指定一个dns地址空的没用的ip,这个地址其实在node1,2的kubelet.config里有指定
  ports:
  - name: dns
    port: 53
    protocol: UDP
  - name: dns-tcp
    port: 53
    protocol: TCP
---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: kube-dns
  namespace: kube-system
  labels:
    kubernetes.io/cluster-service: "true"
    addonmanager.kubernetes.io/mode: Reconcile
---
apiVersion: v1
kind: ConfigMap
metadata:
  name: kube-dns
  namespace: kube-system
  labels:
    addonmanager.kubernetes.io/mode: EnsureExists
---
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: kube-dns
  namespace: kube-system
  labels:
    k8s-app: kube-dns
    kubernetes.io/cluster-service: "true"
    addonmanager.kubernetes.io/mode: Reconcile
spec:
  # replicas: not specified here:
  # 1. In order to make Addon Manager do not reconcile this replicas parameter.
  # 2. Default is 1.
  # 3. Will be tuned in real time if DNS horizontal auto-scaling is turned on.
  strategy:
    rollingUpdate:
      maxSurge: 10%
      maxUnavailable: 0
  selector:
    matchLabels:
      k8s-app: kube-dns
  template:
    metadata:
      labels:
        k8s-app: kube-dns
      annotations:
        scheduler.alpha.kubernetes.io/critical-pod: ''
    spec:
      tolerations:
      - key: "CriticalAddonsOnly"
        operator: "Exists"
      volumes:
      - name: kube-dns-config
        configMap:
          name: kube-dns
          optional: true
      containers:
      - name: kubedns
        image: registry.cn-hangzhou.aliyunc