从AWS CLI以Zip格式下载AWS Lambda源程序包

Question

我想将AWS Lambda源软件包下载为Zip。我知道在lambda控制台中可以选择将lambda函数作为SAM文件或部署包下载。但是我无法在生产环境中访问AWS控制台。请参阅随附的屏幕。

下面是两个可用选项。

我想使用最少的Shell脚本命令在AWS CLI中执行相同的功能。以zip格式下载lambda源代码后，我将通过AWS CLI在生产环境中创建lambda函数。

aws lambda create-function --region [AWSREGION] --function-name [FUNCTION] --zip-file fileb://[ZIPFILE] --role [ROLEARN] --handler [FILENAME].lambda_handler  --description="[FUNCTIONDESCRIPTION]"  --runtime [RUNTIME] --timeout [TIMEOUT] --memory-size [MEMORYSIZE] --profile [PROFILENAME]

请帮助我解决此问题，Linux Shell脚本命令中的帮助将受到高度赞赏。

Answer 1

您可以在这里找到答案：

Download an already uploaded Lambda function

https://gist.github.com/nemaniarjun/defdde356b6678352bcd4af69b7fe529处也提供了一个简单的bash解决方案

# Parallelly download all aws-lambda functions 
# Assumes you have ran `aws configure` and have output-mode as "text"
# Works with "aws-cli/1.16.72 Python/3.6.7 Linux/4.15.0-42-generic botocore/1.12.62"
download_code () {
    local OUTPUT=$1
    aws lambda get-function --function-name $OUTPUT | head -n 1 | cut -f 2 | xargs wget -O ./lambda_functions/$OUTPUT.zip  
}

mkdir lambda_functions
for run in $(aws lambda list-functions | cut -f 6 | xargs);
doth
    download_code "$run" &
done

编辑：归功于原始作者。只共享代码，因为以后URL可能无法访问。

Answer 2

根据您的要求，可以使用aws lambda get-function CLI命令下载lambda函数部署包。

请参阅提要。

  get-function
--function-name <value>
[--qualifier <value>]
[--cli-input-json <value>]
[--generate-cli-skeleton <value>]

You can also see full detail.

但是此命令不会提供zip文件。如果执行命令。

aws lambda get-function --function-name MyLambdaFunction

它将给您类似于以下结果。

{
    "Code": {
        "RepositoryType": "S3",
        "Location": "https://awslambda-eu-west-1-tasks.s3.eu-west-1.amazonaws.com/snapshots/014747066885/MyLambdaFunction-aa227fd0-4d4a-4690-9447-6e1818aaa752?versionId=HoQu5vbudzRpYLe0laIVQIahVN2NVxET&X-Amz-Security-Token=FQoGZXIvYXdzEIr%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FwEaDB%2FdpZU6fCyQG%2ByhJyK3A7Dycy5L9hVWmExELuh6f0jFskmKJ62GhGf3J7LC94wB5E5CU2jplsLhw%2Fd%2FmmmJktzo07wI3XLWvSj6zxbHvJFdscCAqF7AYZOhRQR4mOIN6HkanRrHMBHeoTeDqOT6Yk8elhQYfno7dSHP%2FwdNVutS9P0SNmDLDhrxNLAxceDz8nBj1N9AZqhfMwV65OCtTubgLaLSFei75DosXIUaylWsrXgrz4B%2F6bo8LmeDxhNcYefGOBMvwKtyFSdPAP1TulcJpwQIUIC3losjtcTnRt9CSTxhn7TPMDfw4QI5ITKvxgNzO5T2TF2cJVqbotFFVdqPQNHuL2XLMNU24BwjSwF%2FsKWlV6tygXhdQWpTrJFRW%2FqxV%2BX2C1yq0sjpWtc5SerkrmqHvvDjA0L7GlOpG8Q1BLHyQWj0FPmuhrrPyjyFCNqVkpo6eUl35yK%2BHWa1hsXoEPyccoqdHa4gU%3D&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Date=20190203T092717Z&X-Amz-SignedHeaders=host&X-Amz-Expires=600&X-Amz-Credential=ASIA54NGUQSHZ4CZTFNT%2F20190203%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Signature=ee3bbef557cff32f86d26abc769b14"
    },
    "Configuration": {
        "TracingConfig": {
            "Mode": "PassThrough"
        },
        "Version": "$LATEST",
        "CodeSha256": "l6q5ldtk0YEhEv3wnJhhCiAPyRd2XB1/8nT+ZWk=",
        "FunctionName": "MyLambdaFunction",
        "MemorySize": 3008,
        "RevisionId": "a3bdbef4-8616-4c6a-ba19-074acb80b143",
        "CodeSize": 6083880,
        "FunctionArn": "arn:aws:lambda:us-east-1:014747066885:function:MyLambdaFunction",
        "Handler": "lambda_function.lambda_handler",
        "Role": "arn:aws:iam::014747066885:role/lambda_admin",
        "Timeout": 900,
        "LastModified": "2019-01-30T10:09:50.283+0000",
        "Runtime": "python3.6",
        "Description": "Test MyLambdaFunction"
    }
}

现在您需要进行进一步的调整，将其转换为zip格式文件。

您可以使用以下两个命令来获取zip文件格式的lambda函数。

aws lambda get-function --function-name MyLambdaFunction --profile [AWS_ROFILE] | grep "Location" | awk -F ": " '{ print $2}' | sed 's/"//g' > ~/MyLambdaFunction.txt
wget -i ~/MyLambdaFunction.txt -O ~/MyLambdaFunction.zip

这里是完整的shell脚本命令。

FUNCTION_NAME=${1}
AWS_PROFILE=[AWSPROFILE]
aws lambda get-function --function-name ${FUNCTION_NAME} --profile ${AWS_PROFILE} | grep "Location" | awk -F ": " '{ print $2}' | sed 's/"//g' > ~/${FUNCTION_NAME}.txt
wget -i ~/${FUNCTION_NAME}.txt -O ~/${FUNCTION_NAME}.zip

您可以将其转换为shell脚本（例如getLambdaFunction.sh），并使用以下命令执行。

./getLambdaFunction.sh [FUNCTIONNAME]

将lambda包作为zip文件获取后，您可以创建lambda函数。

aws lambda create-function --region us-east-1 --function-name MyLambdaFunction --zip-file fileb://MyLambdaFunction.zip --role arn:aws:iam::[AWSACCOUNT]:role/service-role/[LAMBDAROLE] --handler lambda_function.lambda_handler --description="My Lambda Function" --runtime "python3.6" --profile [AWSPROFILE]

作为示例：假定MyLambdaFunction是lambda函数名称，us-east-1是aws区域，运行时是python 3.6。

Answer 3

我根据先前共享的原始Python脚本创建了一个简单的Bash脚本。

不同之处在于它接受JSON输入并按顺序而不是并行下载文件。

AWS Lambda Download Bash Script

# !/bin/sh
## List the names of all Lambda functions. Can be constrained by using --max-items
for i in `aws lambda list-functions | grep FunctionName | cut -d ":" -f2 | cut -d '"' -f2`
do
  echo 'Fetching code for function:' $i
  ## Using each name, get the function details and then download the zip file containing the source code.
  aws lambda get-function --function-name $i | grep Location | awk -F' ' '{print $2}' | xargs wget -O $i.zip
  echo 'Code downloaded to' $i.zip
done