无法从Kubernetes集群外部连接到postgres

我创建了一个运行一个容器（postgres-container）和一个NodePort（postgres-service）的部署。我可以从pod本身连接到postgresql：

$ kubectl --context=minikube exec -it postgres-deployment-7fbf655986-r49s2 \

-- psql --port=5432 --username=postgres --dbname=postgres

但我无法通过该服务连接。

$ minikube service --url postgres-service
http://192.168.99.100:32254

$ psql --host=192.168.99.100 --port=32254 --username=postgres --dbname=postgres
psql: could not connect to server: Connection refused

    Is the server running on host "192.168.99.100" and accepting
    TCP/IP connections on port 32254?

我认为postgres已正确配置为接受远程TCP连接：

$ kubectl --context=minikube exec -it postgres-deployment-7fbf655986-r49s2 \

-- tail /var/lib/postgresql/data/pg_hba.conf

host all all 127.0.0.1/32 trust
...
host all all all md5

$ kubectl --context=minikube exec -it postgres-deployment-7fbf655986-r49s2 \

-- grep listen_addresses /var/lib/postgresql/data/postgresql.conf

listen_addresses = '*'
我的服务定义如下：

apiVersion: v1
kind: Service
metadata:
name: postgres-service
spec:
selector:

app: postgres-container

type: NodePort
ports:

- port: 5432
  targetPort: 5432
  protocol: TCP

部署是：

apiVersion: apps/v1beta2
kind: Deployment
metadata:
name: postgres-deployment
spec:
replicas: 1
selector: