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aws-lambda - 具有云形成的 Lambda : Pass Cloud formation variable to python code

转载 作者:行者123 更新时间:2023-12-02 03:38:09 25 4
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嗨,下面是 clouformation,代码我们有 lambda 函数 s3 到 s3 副本的 python 代码片段。这里无法将目标存储桶从云形成参数传递到 python 代码片段,如 target_bucket = Ref: dstBucket

我现在正在硬编码 target_bucket = destination1 但我想作为引用值传递

我尝试过各种方法都没有成功。

                    ---
AWSTemplateFormatVersion: '2010-09-09'
Description: 'objects from Prod bucket to Dev data bucket '
Parameters:
CustomerName:
Description: Customer Name
Type: String
Default: incoming
ProjectName:
Description: Project Name
Type: String
Default: TEST
ENV:
Description: Environment (dev, prd)
Type: String
Default: dev
srcBucket:
Description: Source Bucket that receives data from outside
Default: source1
Type: String
dstBucket:
Description: Destination Bucket that will receive files
Type: String
Default: destination1
Resources:
LambdaRole:
Type: AWS::IAM::Role
Properties:
AssumeRolePolicyDocument:
Version: '2012-10-17'
Statement:
- Effect: Allow
Principal:
Service:
- lambda.amazonaws.com
- s3.amazonaws.com
Action:
- sts:AssumeRole
Path:
Fn::Sub: "/${ProjectName}/"
Policies:
- PolicyName:
Fn::Sub: "${AWS::StackName}"
PolicyDocument:
Version: '2012-10-17'
Statement:
- Sid: AllowLogging
Effect: Allow
Action:
- logs:CreateLogGroup
- logs:CreateLogStream
- logs:PutLogEvents
Resource: "*"
- Sid: SrcBucketPrivs
Action:
- s3:GetObject
- s3:List*
Resource:
- Fn::Sub: arn:aws:s3:::${srcBucket}/*
- Fn::Sub: arn:aws:s3:::${srcBucket}
Effect: Allow
- Sid: DstBucketPrivs
Action:
- s3:PutObject
- s3:List*
Resource:
- Fn::Sub: arn:aws:s3:::${dstBucket}/*
- Fn::Sub: arn:aws:s3:::${dstBucket}
Effect: Allow
LambdaFunction:
Type: AWS::Lambda::Function
DependsOn: LambdaRole
Properties:
Code:
ZipFile: |
from __future__ import print_function
import os
import json
import boto3
import time
import string
import urllib
print('Loading function')
s3 = boto3.client('s3')
def handler(event, context):
source_bucket = event['Records'][0]['s3']['bucket']['name']
key = event['Records'][0]['s3']['object']['key']


target_bucket = Ref: dstBucket
copy_source = {'Bucket':source_bucket, 'Key':key}

try:
s3.copy_object(Bucket=target_bucket, Key=key, CopySource=copy_source)

except Exception as e:
print(e)
print('Error getting object {} from bucket {}. Make sure they exist '
'and your bucket is in the same region as this '
'function.'.format(key, source_bucket))
raise e

Description: Copies objects from srcBucket to dstBucket based on S3 Event Trigger
FunctionName:
Fn::Sub: "${AWS::StackName}"
Handler: index.handler
MemorySize: 128
Role:
Fn::GetAtt:
- LambdaRole
- Arn
Runtime: python3.6
Timeout: 60
LambdaInvokePermission:
Type: AWS::Lambda::Permission
DependsOn: LambdaFunction
Properties:
FunctionName:
Fn::GetAtt:
- LambdaFunction
- Arn
Action: lambda:InvokeFunction
Principal: s3.amazonaws.com
SourceAccount:
Ref: AWS::AccountId
SourceArn:
Fn::Sub: arn:aws:s3:::${srcBucket}

嗨,下面是 clouformation,代码我们有 lambda 函数 s3 到 s3 副本的 python 代码片段。这里无法将目标存储桶从云形成参数传递到 python 代码片段,如 target_bucket = Ref: dstBucket

我现在正在硬编码 target_bucket = destination1 但我想作为引用值传递

我尝试过各种方法都没有成功。

最佳答案

您可以使用Environment你的 lambda 上的属性就像

LambdaFunction:
Type: AWS::Lambda::Function
DependsOn: LambdaRole
Properties:
...
Environment:
Variables:
DESTINATION_BUCKET: !Ref dstBucket

然后您可以更新代码以读取环境变量

target_bucket = os.environ['DESTINATION_BUCKET']

或者,如果您确实想使用引用,可以使用 !Sub 函数,例如

LambdaFunction:
Type: AWS::Lambda::Function
DependsOn: LambdaRole
Properties:
Code:
ZipFile: !Sub |
...
target_bucket = "${dstBucket}"
...

关于aws-lambda - 具有云形成的 Lambda : Pass Cloud formation variable to python code,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/49503569/

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