如何使用 Kubernetes 和持久存储部署 Drupal 7？

Question

我正在尝试在 Kubernetes 中部署 Drupal 7，但失败并出现错误 Fatal error: require_once(): Failed opening required '/var/www/html/modules/system/system.install' (include_path='.:/usr/local/lib/php') in /var/www/html/includes/install.core.inc on line 241。

这是 K8S 部署清单：

--- 
apiVersion: v1
kind: PersistentVolumeClaim
metadata: 
  name: drupal-pvc
  annotations:
    pv.beta.kubernetes.io/gid: "drupal-gid"
spec: 
  accessModes: 
    - ReadWriteOnce
  resources: 
    requests: 
      storage: 5Gi
--- 
apiVersion: v1
kind: Service
metadata: 
  name: drupal-service
spec: 
  ports: 
    - name: http
      port: 80
      protocol: TCP
  selector: 
    app: drupal
  type: LoadBalancer
--- 
apiVersion: extensions/v1beta1
kind: Deployment
metadata: 
  labels: 
    app: drupal
  name: drupal
spec: 
  replicas: 1
  template: 
    metadata: 
      labels: 
        app: drupal
    spec: 
      initContainers:
        - name: init-sites-volume
          image: drupal:7.72
          command: ['/bin/bash', '-c']
          args: ['cp -r /var/www/html/sites/ /data/; chown www-data:www-data /data/ -R']
          volumeMounts:
          - mountPath: /data
            name: vol-drupal
      containers: 
        - image: drupal:7.72
          name: drupal
          ports: 
            - containerPort: 80
          volumeMounts:
          - mountPath: /var/www/html/modules
            name: vol-drupal
            subPath: modules
          - mountPath: /var/www/html/profiles
            name: vol-drupal
            subPath: profiles
          - mountPath: /var/www/html/sites
            name: vol-drupal
            subPath: sites
          - mountPath: /var/www/html/themes
            name: vol-drupal
            subPath: themes 

      volumes:
        - name: vol-drupal
          persistentVolumeClaim: 
            claimName: drupal-pvc

但是，当我从 drupal 容器中删除 volumeMounts 时，它可以工作。我需要使用卷来保存网站数据，有人可以提出解决方法吗？

更新：我还添加了持久化卷的清单。

Answer 1

检查您是否可以写入已安装的卷。

# kubectl exec -it drupal-zxxx -- sh
$ ls -alhtr /var/www/html/modules
$ cd /var/www/html/modules
$ touch test.txt

因为配置了组 ID (GID) 的存储只允许使用相同 GID 的 Pod 写入。不匹配或缺少 GID 会导致权限被拒绝错误。

或者，您可以尝试使用 drupal 的运算符： https://github.com/geerlingguy/drupal-operator

还有 helm chart 是另一种选择： https://bitnami.com/stack/drupal/helm