如何解决如何在 kubernetes 中为具有多个容器的单个 pod 配置 pv 和 pvc
需要为 MySQL、MongoDB、MySQL 创建具有多个容器的单个 pod。我的问题是我是否需要为每个容器创建持久性卷和持久性卷声明，并在 pod 配置中指定卷或单个 PV 和 PVC 是否足以满足以下配置中单个类似 pod 的所有容器.
您能否验证以下配置是否足够？
PV：
apiVersion: v1
kind: PersistentVolume
metadata:
name: mypod-pv
labels:
type: local
spec:
storageClassName: manual
capacity:
storage: 10Gi
accessModes:
- ReadWriteOnce
hostPath:
path: "/mnt/data"
---
PVC
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: mypod-pvc
spec:
storageClassName: manual
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 3Gi
---
部署：
apiVersion: apps/v1
kind: Deployment
metadata:
name: mypod
labels:
app: mypod
spec:
replicas: 1
selector:
matchLabels:
app: mypod
template:
metadata:
labels:
app: mypod
spec:
volumes:
- name: task-pv-storage
persistentVolumeClaim:
claimName: mypod-pvc
containers:
- name: mysql
image: mysql/mysql-server:latest
ports:
- containerPort: 3306
imagePullPolicy: IfNotPresent
volumeMounts:
- mountPath: "/var/lib/mysql"
name: task-pv-storage
- name: mongodb
image: openshift/mongodb-24-centos7
ports:
- containerPort: 27017
imagePullPolicy: IfNotPresent
volumeMounts:
- mountPath: "/var/lib/mongodb"
name: task-pv-storage
- name: mssql
image: mcr.microsoft.com/mssql/server
ports:
- containerPort: 1433
imagePullPolicy: IfNotPresent
volumeMounts:
- mountPath: "/var/opt/mssql"
name: task-pv-storage
imagePullSecrets:
- name: devplat
解决方法
您不应在单个 Pod 中运行多个数据库容器。
考虑在单独的 statefulset 中运行每个数据库。
按照下面的mysql参考
https://kubernetes.io/docs/tasks/run-application/run-replicated-stateful-application/
您也需要对 mongodb 或其他数据库采用类似的方法。