时间戳

首页 > 解决方案 > aws events put-targets 响应为正，但未添加触发器

aws-lambda - aws events put-targets 响应为正，但未添加触发器

问题描述

我正在部署一个 lambda 函数，我想每天调用它。我意识到即使我没有收到任何错误，最后的部署步骤也会以某种方式失败

aws events put-rule --name "daily_lambda_rule" \ 
                    --schedule-expression 'rate(15 minutes)'


aws lambda add-permission --function-name daily_lambda_rule \
                          --statement-id daily_lambda_function_scheduler \
                          --action 'lambda:InvokeFunction' \
                          --principal events.amazonaws.com \
                          --source-arn arn:aws:events:us-east-1:your-account-id:rule/daily_lambda_rule

aws events put-targets --rule daily_lambda_rule \
                        --targets "Id": "1","Arn":"arn:aws:lambda:us-east-1:your-account-id:function:myfun"

最后的输出是：

{
    "FailedEntryCount": 0,
    "FailedEntries": []
}

这表明一切顺利，但是当我单击 lambda 函数时，我没有看到 cloudwatch 已添加此触发器的迹象。此外，手动添加触发器也可以正常工作。

使用boto3产生相同的结果：

import boto3
events_client = boto3.client('events')
lambda_arn = 'arn:aws:lambda:eu-west-2:my-account-id:function:myfunction'
event_rule_name ='daily_lambda_rule'

scheduled_lambda = [
    {
        'Id': "myfunction", # lambda name
        'Arn': lambda_arn,
    }
]

response = events_client.put_targets(Rule=event_rule_name,
                          Targets=scheduled_lambda)

哪里/什么可能是阻止脚本adding the trigger进入 lambda 函数的错误？

在此我未成功检查一些链接： https ://towardsdatascience.com/loading-reddit-posts-using-aws-lambda-and-cloudwatch-events-9edb03ba4c14

https://docs.aws.amazon.com/cli/latest/reference/events/put-targets.html

boto3 - put_target https://docs.aws.amazon.com/code-samples/latest/catalog/python-cloudwatch-put_targets.py.html

boto3-示例 https://github.com/awsdocs/aws-doc-sdk-examples/blob/master/python/example_code/lambda/scheduled_lambda/scheduled_lambda.py

标签： aws-lambdaboto3aws-cliamazon-cloudwatch

解决方案

我做了两个观察：首先：在 CLI 命令中，在放置规则时，也启用状态：

aws events put-rule --name "daily_lambda_rule" \ 
                    --schedule-expression 'rate(15 minutes)'
                    --state 'ENABLED'

其次：在 Python Boto3 脚本中，您跳过了 Lambda 权限步骤 - 必须将触发器附加到 Lambda。以下是对我有用的完整代码：

import boto3

lambda_client = boto3.client('lambda')
events_client = boto3.client('events')

lambda_name = "live_scoreboard"
fn_role = 'arn:aws:iam::{}:role/lambda_basic_execution'.format(MY_ACCOUNT_ID)

create_res = lambda_client.create_function(
    FunctionName=lambda_name,
    Runtime='python3.8',
    Role=fn_role,
    Handler="{0}.lambda_handler".format(lambda_name),
    Code={'ZipFile': open("CODE_FILE_PATH.ZIP", 'rb').read(), },
)
fn_arn = create_res['FunctionArn']
cron = "0/5 9-18 * 2 ? 2020"
rule_name = "sb_".format(lambda_name)

rule_res = events_client.put_rule(
    Name=rule_name,
    ScheduleExpression='cron({})'.format(cron),
    State='ENABLED',
)
lambda_client.add_permission(
    FunctionName=lambda_name,
    StatementId="{0}-Event".format(rule_name),
    Action='lambda:InvokeFunction',
    Principal='events.amazonaws.com',
    SourceArn=rule_res['RuleArn'],
)
events_client.put_targets(
    Rule=rule_name,
    Targets=[
        {
            'Id': "target_" + (SOME_ID),
            'Arn': fn_arn,
        },
    ]
)

推荐阅读