RabbitMQ 配置文件不适用于 Kubernetes 部署

Question

我正在尝试在 Kubernetes 集群上部署 RabbitMQ，并使用 initcontainer 从 ConfigMap 复制文件。但是，在 POD 处于运行状态后，文件不会被复制。

最初，我尝试不使用 initcontainer，但收到类似“touch: cannot touch '/etc/rabbitmq/rabbitmq.conf': Read-only file system.”之类的错误。

kind: Deployment
metadata:
  name: broker01
  namespace: s2sdocker
  labels:
    app: broker01
spec:
  replicas: 1
  selector:
    matchLabels:
      app: broker01
  template:
   metadata:
     name: broker01
     labels:
       app: broker01
   spec:
     initContainers:
      - name: configmap-copy
        image: busybox
        command: ['/bin/sh', '-c', 'cp /etc/rabbitmq/files/definitions.json /etc/rabbitmq/']
        volumeMounts:
          - name: broker01-definitions
            mountPath: /etc/rabbitmq/files
          - name: pre-install
            mountPath: /etc/rabbitmq

     containers:
      - name: broker01
        image: rabbitmq:3.7.17-management
        envFrom:
          - configMapRef:
              name: broker01-rabbitmqenv-cm
        ports:
        volumeMounts:
          - name: broker01-data
            mountPath: /var/lib/rabbitmq
          - name: broker01-log
            mountPath: /var/log/rabbitmq/log
          - name: broker01-definitions
            mountPath: /etc/rabbitmq/files
     volumes:
       - name: pre-install
         emptyDir: {}
       - name: broker01-data
         persistentVolumeClaim:
           claimName: broker01-data-pvc
       - name: broker01-log
         persistentVolumeClaim:
           claimName: broker01-log-pvc
       - name: broker01-definitions
         configMap:
            name: broker01-definitions-cm

文件“definitions.json”应该被复制到/etc/reabbitmq 文件夹。我关注了“Kubernetes deployment read-only filesystem error”。但问题没有解决。

Answer 1

在“containers volumeMount”部分进行更改后，我能够将文件复制到 /etc/rabbitmq 文件夹。

请在此处找到修改后的代码。

      - name: broker01
        image: rabbitmq:3.7.17-management
        envFrom:
          - configMapRef:
              name: broker01-rabbitmqenv-cm
        ports:
        volumeMounts:
          - name: broker01-data
            mountPath: /var/lib/rabbitmq
          - name: broker01-log
            mountPath: /var/log/rabbitmq/log
          - name: pre-install
            mountPath: /etc/rabbitmq

Answer 2

你能检查 /etc/rabbitmq/ 的权限吗？ 用户是否有权将文件复制到上述位置？

      - name: pre-install
        mountPath: /etc/rabbitmq

我看到 /etc/rabbitmq 是一个挂载点。它是一个现成的文件系统，因此文件复制失败。

您能否更新“预安装”挂载点的权限