kubernetes提供了多种持久存储数据的方式，见官网 此处我们使用nfs-server做数据持久化的方式。直接开始部署我们的Postgresql吧
1. 初始化postgresql的配置
file: 01-postgresql-configmap.yaml
apiVersion: v1
kind: ConfigMap
metadata:
name: postgres-config
namespace: kube-ops
labels:
app: postgres-prom
data:
POSTGRES_DB: postgresdb
POSTGRES_USER: postgresadmin
POSTGRES_PASSWORD: admin1232. 创建对应的存储卷
file: 02-postgresql-pv.yaml,注意此处我们需要提前准备好nfs-server，以及暴露出/data目录供网络存储
apiVersion: v1
kind: PersistentVolume
metadata:
name: postgres-pv-volume
spec:
capacity:
storage: 10Gi
accessModes:
- ReadWriteOnce
persistentVolumeReclaimPolicy: Recycle
nfs:
server: 192.168.10.234path: /data
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: postgres-pv-claim
namespace: kube-ops
spec:
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 10Gi3. 部署PostgraSQL
当已有服务使用了nfs作为本地持久化存储的时候，我们直接启动postgresql会初始化错误，因此我们可以使用subPath: postgresql进行区分
file: 03-postgresql-dp.yaml
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: postgres-prom
namespace: kube-ops
spec:
replicas: 1template:
metadata:
labels:
app: postgres-prom
spec:
containers:
- name: postgres
image: postgres:10.4imagePullPolicy: "IfNotPresent"ports:
- containerPort: 5432envFrom:
- configMapRef:
name: postgres-config
volumeMounts:
- mountPath: /var/lib/postgresql/data
subPath: postgresql
name: postgredb
volumes:
- name: postgredb
persistentVolumeClaim:
claimName: postgres-pv-claim4. 暴露postgresql服务
file: 04-postgresql-svc.yaml
apiVersion: v1
kind: Service
metadata:
name: postgres
namespace: kube-ops
labels:
app: postgres-prom
spec:type: NodePort
ports:
- port: 5432selector:
app: postgres-prom以上就是部署postgresql需要的文件，一切准备就绪之后，我们就可以开始部署了
代码语言：javascript复制kubectl apply -f .
➜ 13-1-postgresql git:(master) ✗ (☸ kubernetes-admin@kubernetes:default) k get pods -n kube-ops -o wide -l app=postgres-prom
NAME READY STATUS RESTARTS AGE IP NODE
postgres-prom-6f54c97948-fp8th 1/1 Running 0 18m 10.244.2.63 dev-k8s-node1
