持久化 edgeAgent 存储的正确配置是什么？

Question

我正在处理 Azure IoT Edge 项目。目前我正在浏览 edgeAgent 和 edgeHub 模块的 production readiness checklist. I followed the documentation to use storage on the host filesystem。

当我运行 sudo iotedge check edgeHub 正常但 edgeAgent 发出警告时：

‼ 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

这是部署模板中的一个片段：

"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

我遵循了相同的文档，并且能够避免我的 Raspberry Pi 3 上的生产准备清单警告。

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

配置了 "Binds"

"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) 重启Raspberry Pi 3、确保授权生效。

确保您的边缘设备上有可用的主机存储文件夹。
确保向用户提供这些文件夹的完全访问权限。
尝试使用更新后的清单进行部署，它应该可以工作。

Answer 2

从 1.0.9 版开始，存在一个问题，即 edgeAgent 的配置不会更新，除非更新其图像标签。您当前状态的两个选项：

在图像设置中使用特定标签（始终推荐）。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，新的 storageFolder env var 将被拾取。

运行 'iotedge check' 在容器更新后再次出现，这个警告应该会消失。

持久化 edgeAgent 存储的正确配置是什么？

What is the proper configuration to persist edgeAgent storage?

azure

azure-iot-hub

azure-iot-edge