‘'serverless -f hello’给KeyError

Question

为了学习如何使用无服务器框架，我正在学习一个教程。我们的目标是部署一个Django应用程序。本教程建议将必要的环境变量放在单独的yml文件中。不幸的是，按照教程操作会得到一个KeyError。我有一台serverless.yml，variables.yml和一台handler.py。我将检查下面的所有代码，以及给定的错误。

serverless.yml：

service: serverless-django
custom: ${file(./variables.yml)}
provider:
  name: aws
  runtime: python3.8
functions:
  hello:
    environment: 
      - THE_ANSWER: ${self:custom.THE_ANSWER}
    handler: handler.hello

variables.yml：

THE_ANSWER: 42

handler.py：

import os

def hello(event, context):
    return {
        "statusCode": 200,
        "body": "The answer is: " + os.environ["THE_ANSWER"]
    }

我的终端中的错误：

{
    "errorMessage": "'THE_ANSWER'",
    "errorType": "KeyError",
    "stackTrace": [
        "  File \"/var/task/handler.py\", line 7, in hello\n    \"body\": \"The answer is: \" + os.environ[\"THE_ANSWER\"]\n",
        "  File \"/var/lang/lib/python3.8/os.py\", line 675, in __getitem__\n    raise KeyError(key) from None\n"
    ]
}
 
  Error --------------------------------------------------
 
  Error: Invoked function failed
      at AwsInvoke.log (/snapshot/serverless/lib/plugins/aws/invoke/index.js:105:31)
      at AwsInvoke.tryCatcher (/snapshot/serverless/node_modules/bluebird/js/release/util.js:16:23)
      at Promise._settlePromiseFromHandler (/snapshot/serverless/node_modules/bluebird/js/release/promise.js:547:31)
      at Promise._settlePromise (/snapshot/serverless/node_modules/bluebird/js/release/promise.js:604:18)
      at Promise._settlePromise0 (/snapshot/serverless/node_modules/bluebird/js/release/promise.js:649:10)
      at Promise._settlePromises (/snapshot/serverless/node_modules/bluebird/js/release/promise.js:729:18)
      at _drainQueueStep (/snapshot/serverless/node_modules/bluebird/js/release/async.js:93:12)
      at _drainQueue (/snapshot/serverless/node_modules/bluebird/js/release/async.js:86:9)
      at Async._drainQueues (/snapshot/serverless/node_modules/bluebird/js/release/async.js:102:5)
      at Immediate._onImmediate (/snapshot/serverless/node_modules/bluebird/js/release/async.js:15:14)
      at processImmediate (internal/timers.js:456:21)
      at process.topLevelDomainCallback (domain.js:137:15)
 
     For debugging logs, run again after setting the "SLS_DEBUG=*" environment variable.
 
  Get Support --------------------------------------------
     Docs:          docs.serverless.com
     Bugs:          github.com/serverless/serverless/issues
     Issues:        forum.serverless.com
 
  Your Environment Information ---------------------------
     Operating System:          linux
     Node Version:              12.18.1
     Framework Version:         2.0.0 (standalone)
     Plugin Version:            4.0.2
     SDK Version:               2.3.1
     Components Version:        3.1.2

我正在尝试的命令是'sls hello -f hello‘。命令'sls deploy‘已成功执行。

我是无服务器的新手，所以请让我知道如何解决这个问题，或者如果需要更多信息。

Answer 1

首先，yml脚本中有一个错误：

无服务器错误

环境变量0中的无效字符

The error is defining environment variables as an array instead of key-value pairs

然后在部署之后，一切工作顺利(sls deploy -v)

sls调用--f hello

{ "statusCode"：200，"body"：“答案是: 42”}

serverless.yml

service: sls-example

custom: ${file(./variables.yml)}

provider:
  name: aws
  runtime: python3.8

functions:
  hello:
    environment:
        THE_ANSWER: ${self:custom.THE_ANSWER}
    handler: handler.hello

variables.yml

THE_ANSWER: 42