Kubernetes部署中没有RabbitMQ配置文件

Question

我试图在Kubernetes集群上部署RabbitMQ，并使用initcontainer从ConfigMap复制一个文件。但是，POD处于运行状态后，文件不会复制。

最初，我尝试不使用init容器，但我得到了一个错误，如“触摸：不能触摸'/etc/Rabbitmq/rabbitmq.conf'：只读文件系统”

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”应复制到/etc/reabbitmq文件夹。我遵循了“Kubernetes部署只读文件系统错误”。但问题并没有解决。

Answer 1

您可以检查/etc/rabbitmq/上的权限吗。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。它是一个仅准备就绪的文件系统，因此文件复制失败。

可以更新预安装挂载点的权限吗

Answer 2

在“容器卷装部分”中进行更改后，我能够将文件复制到 /etc/rabbitmq文件夹中。

请在这里找到修改过的代码。

      - 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