持久化edgeAgent存储的正确配置是什么？

Question

我正在从事一个Azure IoT边缘项目。目前，我正在通过生产准备清单。我按照文档介绍了使用主机文件系统上的存储中的edgeAgent和edgeHub模块。

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

‼ 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

下面是来自部署模板的片段：

"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

在1.0.9版中，edgeAgent的配置不更新，除非它的图像标记被更新，这是一个问题。来自当前状态的两个选项：

• 在图像设置中使用特定的标记(总是推荐的)。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，并将获取新的storageFolder env。

在更新容器后再次运行“iotedge检查”，此警告将消失。

Answer 2

我遵循了相同的文档，并能够避免在我的Raspberry Pi 3的生产准备清单警告。

1)我按照文档链接模块存储到设备存储配置了“绑定”

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

2)从SSH终端为用户提供了HostStoragePath上的用户访问。

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

3)重新启动Raspberry Pi 3，以确保授权访问生效。

• 确保您的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。
• 尝试使用更新的清单进行部署，它可能会工作。