Question

我正在研究Azure IoT Edge项目。目前，我正在经历production readiness checklist。我按照文档的说明使用use storage on the host filesystem来获取edgeAgent和edgeHub模块。

当我运行sudo iotedge check时，edgeHub可以，但是edgeAgent发出警告：

‼ production readiness: Edge Agent's storage directory is persisted on the host filesystem - Warning
    The edgeAgent module is not configured to persist its /tmp/edgeAgent directory on the host filesystem.
    Data might be lost if the module is deleted or updated.
    Please see https://aka.ms/iotedge-storage-host for best practices.
√ production readiness: Edge Hub's storage directory is persisted on the host filesystem - OK

以下是部署模板中的代码段：

"systemModules": {
  "edgeAgent": {
    "type": "docker",
    "settings": {
      "image": "mcr.microsoft.com/azureiotedge-agent:1.0",
      "createOptions": {
        "HostConfig": {
          "Binds": [
            "/home/pi/iotedge/edgeAgent/storage/:/iotedge/storage/"
          ]
        }
      }
    },
    "env": {
      "storageFolder": {
        "value": "/iotedge/storage/"
      }
    }
  },
  "edgeHub": {
    "type": "docker",
    "status": "running",
    "restartPolicy": "always",
    "settings": {
      "image": "mcr.microsoft.com/azureiotedge-hub:1.0",
      "createOptions": {
        "HostConfig": {
          "Binds": [
            "/home/pi/iotedge/edgeHub/storage:/iotedge/storage/"
          ],
          "PortBindings": {
            "5671/tcp": [
              {
                "HostPort": "5671"
              }
            ],
            "8883/tcp": [
              {
                "HostPort": "8883"
              }
            ],
            "443/tcp": [
              {
                "HostPort": "443"
              }
            ]
          }
        }
      }
    },
    "env": {
      "storageFolder": {
        "value": "/iotedge/storage/"
      }
    }
  }
},

Answer 1

我遵循了相同的文档，并且能够避免在Raspberry Pi 3上出现生产准备清单警告。

1）我已经根据文档Link module storage to device storage

配置了“绑定”

"Binds":["/etc/iotedge/storage/:/iotedge/storage/"]

2）我已经从SSH终端提供了HostStoragePath上的用户访问权限。

sudo chown 1000 /etc/iotedge/storage/
sudo chmod 700 /etc/iotedge/storage/

3）重新启动Raspberry Pi 3，以确保授予访问权限生效。

确保边缘设备上有可用的主机存储文件夹。
确保为用户提供对这些文件夹的完全访问权限。
尝试使用更新的清单进行部署，它应该可以工作。

Answer 2

从1.0.9版开始，存在一个问题，即除非更新其image标签，否则edgeAgent的配置不会更新。您当前状态的两个选择：

在图像设置中使用特定标签（始终建议）。例如。 mcr.microsoft.com/azureiotedge-agent:1.0.9
删除设备上的edgeAgent容器：docker rm -f edgeAgent。它将在30秒内重新启动，并且将提取新的storageFolder环境变量。

在更新容器后再次运行“ iotedge检查”，此警告应消失。

持久化edgeAgent存储的正确配置是什么？

2 个答案: