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希望你们在那些covid时期都做得尽可能好。

概述

我有一个 lambda 函数，它在带有 Greengrass 版本 1 的 raspberry 设备上运行。这个 lambda 访问我的带有 XBee 的 USB 端口（/dev/ttyUSB0）并将此数据发送到 IoT Core 上的 MQTT，它可以工作几个月。它的功能是这样的：我的 GGC 每 5 分钟从一个有一些传感器的远程站接收 5 个包，解包这些数据后，它通过 MQTT 将其作为 JSON 发送。

我目前正在尝试将我的 GGC_v1 更新为 GGC_v2，并且在部署它时遇到了问题。在运行相同的 lambda 函数时，我无法访问版本 2 的本地资源，即使配方有权在设备上进行读写。

在 GGC_V1 上使用以下配置：

  • 使此功能长期存在并使其无限期运行
  • 使用组默认值（当前：Greengrass 容器）
  • 使用组默认值（当前：ggc_user/ggc_group）还添加了对资源的访问/dev/ttyUSB0。

问题日志：

2021-07-13T20:07:22.890Z [INFO] (pool-2-thread-58) com.weatherStation.XBee: Finding mounted cgroups.. {serviceInstance=0, serviceName=com.weatherStation.XBee, currentState=STARTING}
2021-07-13T20:07:22.909Z [INFO] (Copier) com.weatherStation.XBee: Startup script exited. {exitCode=1, serviceInstance=0, serviceName=com.weatherStation.XBee, currentState=STARTING}
2021-07-13T20:07:22.915Z [INFO] (pool-2-thread-53) com.weatherStation.XBee: shell-runner-start. {scriptName=services.com.weatherStation.XBee.lifecycle.shutdown.script, serviceInstance=0, serviceName=com.weatherStation.XBee, currentState=BROKEN, command=["/greengrass/v2/packages/artifacts/aws.greengrass.LambdaLauncher/2.0.7/lambda-l..."]}
2021-07-13T20:07:23.102Z [WARN] (Copier) com.weatherStation.XBee: stderr. 2021/07/13 17:07:23 could not read process state file /greengrass/v2/work/com.weatherStation.XBee/work/worker/0/state.json: open /greengrass/v2/work/com.weatherStation.XBee/work/worker/0/state.json: no such file or directory. {scriptName=services.com.weatherStation.XBee.lifecycle.shutdown.script, serviceInstance=0, serviceName=com.weatherStation.XBee, currentState=BROKEN}
2021-07-13T20:07:23.220Z [ERROR] (pool-2-thread-60) com.weatherStation.XBee: error while removing dir   {"path": "/greengrass/v2/work/com.weatherStation.XBee/work/worker/0", "errorString": "unlinkat /greengrass/v2/work/com.weatherStation.XBee/work/worker/0/overlays: device or resource busy"}. {serviceInstance=0, serviceName=com.weatherStation.XBee, currentState=BROKEN}

食谱：


  "RecipeFormatVersion": "2020-01-25",
  "ComponentName": "com.weatherStation.XBee",
  "ComponentVersion": "5.0.2",
  "ComponentType": "aws.greengrass.lambda",
  "ComponentDescription": "",
  "ComponentPublisher": "AWS Lambda",
  "ComponentSource": "arn:aws:lambda:region:account_id:function:Greengrass_WeatherStation",
  "ComponentConfiguration": {
    "DefaultConfiguration": {
      "lambdaExecutionParameters": {
        "EnvironmentVariables": {}
      },
      "containerParams": {
        "memorySize": 16000,
        "mountROSysfs": false,
        "volumes": {},
        "devices": {
          "0": {
            "path": "/dev/ttyUSB0",
            "permission": "rw",
            "addGroupOwner": true
          }
        }
      },
      "containerMode": "GreengrassContainer",
      "timeoutInSeconds": 15,
      "maxInstancesCount": 100,
      "inputPayloadEncodingType": "json",
      "maxQueueSize": 1000,
      "pinned": true,
      "maxIdleTimeInSeconds": 60,
      "statusTimeoutInSeconds": 60,
      "pubsubTopics": {
        "0": {
          "topic": "ggc/weather_station/data",
          "type": "IOT_CORE"
        }
      }
    }
  },
  "ComponentDependencies": {
    "aws.greengrass.LambdaLauncher": {
      "VersionRequirement": ">=2.0.0 <3.0.0",
      "DependencyType": "HARD"
    },
    "aws.greengrass.TokenExchangeService": {
      "VersionRequirement": ">=2.0.0 <3.0.0",
      "DependencyType": "HARD"
    },
    "aws.greengrass.LambdaRuntimes": {
      "VersionRequirement": ">=2.0.0 <3.0.0",
      "DependencyType": "SOFT"
    }
  },
  "Manifests": [
    {
      "Platform": {
        "os": "linux",
        "architecture": "arm"
      },
      "Lifecycle": {},
      "Artifacts": [
        {
          "Uri": "greengrass:lambda-artifact.zip",
          "Digest": "GVgaQlVuSYmfgbwoStd5dfB9WamdQgrhbE72s2fF04ysno=",
          "Algorithm": "SHA-256",
          "Unarchive": "ZIP",
          "Permission": {
            "Read": "OWNER",
            "Execute": "NONE"
          }
        }
      ]
    }
  ],
  "Lifecycle": {
    "startup": {
      "requiresPrivilege": true,
      "script": "{aws.greengrass.LambdaLauncher:artifacts:path}/lambda-launcher start"
    },
    "setenv": {
      "AWS_GREENGRASS_LAMBDA_CONTAINER_MODE": "{configuration:/containerMode}",
      "AWS_GREENGRASS_LAMBDA_ARN": "arn:aws:lambda:region:account_id:function:Greengrass_WeatherStation:5",
      "AWS_GREENGRASS_LAMBDA_FUNCTION_HANDLER": "main.weather_handler",
      "AWS_GREENGRASS_LAMBDA_ARTIFACT_PATH": "{artifacts:decompressedPath}/lambda-artifact",
      "AWS_GREENGRASS_LAMBDA_CONTAINER_PARAMS": "{configuration:/containerParams}",
      "AWS_GREENGRASS_LAMBDA_STATUS_TIMEOUT_SECONDS": "{configuration:/statusTimeoutInSeconds}",
      "AWS_GREENGRASS_LAMBDA_ENCODING_TYPE": "{configuration:/inputPayloadEncodingType}",
      "AWS_GREENGRASS_LAMBDA_PARAMS": "{configuration:/lambdaExecutionParameters}",
      "AWS_GREENGRASS_LAMBDA_RUNTIME_PATH": "{aws.greengrass.LambdaRuntimes:artifacts:decompressedPath}/runtime/",
      "AWS_GREENGRASS_LAMBDA_EXEC_ARGS": "[\"python3.7\",\"-u\",\"/runtime/python/lambda_runtime.py\",\"--handler=main.weather_handler\"]",
      "AWS_GREENGRASS_LAMBDA_RUNTIME": "python3.7"
    },
    "shutdown": {
      "requiresPrivilege": true,
      "script": "{aws.greengrass.LambdaLauncher:artifacts:path}/lambda-launcher stop; {aws.greengrass.LambdaLauncher:artifacts:path}/lambda-launcher clean"
    }
  }
}
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