我在Azure(ACS)上部署了一个带Kubernetes的Postgres数据库。
我使用了状态集和服务。
apiVersion: apps/v1beta1
kind: StatefulSet
metadata:
name: postgres
spec:
selector:
matchLabels:
app: postgres
serviceName: "postgres"
# 1 instance
replicas: 1
template:
metadata:
labels:
app: postgres
spec:
containers:
# Postgres database
- name: postgres
image: postgres:10
ports:
- containerPort: 5432
volumeMounts:
- name: pv-postgres
mountPath: /var/lib/postgresql/data
env:
- name: POSTGRES_USER
value: postgres
- name: POSTGRES_DB
value: tariffbook_db
- name: PGDATA
value: /var/lib/postgresql/data
- name: POSTGRES_PASSWORD
valueFrom:
secretKeyRef:
name: postgres-secret
key: password
hostname: postgres
volumes:
- name: pv-postgres
# Upon node restart, restart the container
restartPolicy: Always
---
apiVersion: v1
kind: Service
metadata:
name: postgres
labels:
app: postgres
spec:
ports:
- port: 5432
protocol: TCP
selector:
app: postgres
Kubernetes部署数据库并将其注册到kube-dns:
kubectl exec -ti busybox -- nslookup postgres
...
Name: postgres
Address 1: 10.0.209.61 postgres.default.svc.cluster.local
现在,当我发布postgres时,我没有收到任何回复。
kubectl exec -ti busybox -- ping postgres
PING postgres (10.0.209.61): 56 data bytes
--- postgres ping statistics ---
14 packets transmitted, 0 packets received, 100% packet loss
可以通过其内部IP:10.244.0.46访问Pod,但该服务无法访问postgres Pod。
kubectl get pod --all-namespaces -o wide
NAMESPACE NAME READY
STATUS RESTARTS AGE IP NODE
default azure-files-pod 1/1
Running 0 19h 10.244.2.16 k8s-agent-52f7ae4d-1
default busybox 1/1
Running 12 12h 10.244.2.49 k8s-agent-52f7ae4d-1
default postgres-0 1/1
Running 0 1m 10.244.0.46 k8s-agent-52f7ae4d-0
我已关注DNS troubleshooting tips,但我没有注意到DNS设置中的任何错误。
我的StatefulSet或服务中是否存在配置错误的内容?
非常感谢你的帮助! 最好的祝福, Eric MANUGUERRA
答案 0 :(得分:0)
您只打开了端口5432,从不打开ping服务的端口。如果您尝试连接到端口5432,您应该能够:
kubectl exec -ti busybox -- telnet postgres.default.svc.cluster.local 5432
或(你真的不应该尝试直接连接到IP)
kubectl exec -ti busybox -- telnet 10.0.209.61 5432