无法在 Kubernetes 中访问绑定 DNS

Question

我正在尝试使用 microK8S 在本地 Kubernetes 集群中安装 DNS 服务器，但我无法访问 DNS。

此处为部署脚本：

---
kind: Deployment
apiVersion: apps/v1
metadata:
name: bind
labels:
app: bind
spec:
replicas: 1
selector:
matchLabels:
app: bind
template:
metadata:
labels:
app: bind
spec:
containers:
- name: bind
image: sameersbn/bind
env:
- name: ROOT_PASSWORD
value: "toto"
volumeMounts:
- mountPath: /data
name: data
ports:
- containerPort: 53
protocol: UDP
- containerPort: 53
protocol: TCP
- containerPort: 10000
volumes:
- name: data
emptyDir: {}
---
apiVersion: v1
kind: Service
metadata:
name: bind-dns
labels:
name: bind-dns
spec:
type: ClusterIP
ports:
- name: dns
port: 53
targetPort: 53
protocol: UDP
- name: dns-tcp
port: 53
protocol: TCP
targetPort: 53
selector:
name: bind

服务使用 IP 公开

bind-dns        LoadBalancer   10.152.183.144   <pending>     53/UDP,53/TCP     11m

当我 ssh 进入绑定吊舱时它可以工作

host www.google.com 0.0.0.0
Using domain server:
Name: 0.0.0.0
Address: 0.0.0.0#53
Aliases: 
www.google.com has address 172.217.13.132
www.google.com has IPv6 address 2607:f8b0:4020:805::2004

但是在容器之外它没有

host www.google.com 10.152.183.144
;; connection timed out; no servers could be reached

怎么了？为什么我无法访问服务器？

Answer 1

服务资源spec.selector需要指定 podspec.metadata.labels。
所以我认为您需要更改yaml文件的服务资源。

apiVersion: v1
kind: Service
metadata:
name: bind-dns
labels:
name: bind-dns
spec:
type: ClusterIP
ports:
- name: dns
port: 53
targetPort: 53
protocol: UDP
- name: dns-tcp
port: 53
protocol: TCP
targetPort: 53
selector:
app: bind # changed