AWS Cloudformation - 通过规则事件调用 Lambda 失败

Question

我尝试在 cloudformation 中创建一个模板，其中包含一个由一个 cloudwatch 事件规则（每 10 分钟）触发的 lambda 函数。在 cloudwatch 图中，我可以看到调用，但也可以看到所有失败的调用。我相信这是规则的作用问题，但我无法弄清楚。

这是我的模板，您可以在 cloudformation 设计器中看到它。

{
    "AWSTemplateFormatVersion": "2010-09-09",
    "Metadata": {
        "AWS::CloudFormation::Designer": {
            "d1498a15-7d12-4ec9-bba6-3ba163574a10": {
                "size": {
                    "width": 60,
                    "height": 60
                },
                "position": {
                    "x": 450,
                    "y": 90
                },
                "z": 1,
                "embeds": []
            },
            "afe4f2cd-0634-4114-8327-1ecf60933475": {
                "size": {
                    "width": 60,
                    "height": 60
                },
                "position": {
                    "x": 310,
                    "y": 90
                },
                "z": 1,
                "embeds": [],
                "isrelatedto": [
                    "d1498a15-7d12-4ec9-bba6-3ba163574a10"
                ]
            },
            "c7843bb1-3134-44e7-9463-f9054118e52b": {
                "size": {
                    "width": 60,
                    "height": 60
                },
                "position": {
                    "x": 150,
                    "y": 90
                },
                "z": 1,
                "embeds": [],
                "isrelatedto": [
                    "afe4f2cd-0634-4114-8327-1ecf60933475",
                    "40b5efaf-5cdd-449e-9155-177461dd4d8e"
                ]
            },
            "ef4c0b58-6bb9-46c2-a4b4-64260aa2b35d": {
                "size": {
                    "width": 60,
                    "height": 60
                },
                "position": {
                    "x": 310,
                    "y": -30
                },
                "z": 1,
                "embeds": []
            },
            "40b5efaf-5cdd-449e-9155-177461dd4d8e": {
                "size": {
                    "width": 60,
                    "height": 60
                },
                "position": {
                    "x": 310,
                    "y": -40
                },
                "z": 0,
                "embeds": [],
                "isrelatedto": [
                    "afe4f2cd-0634-4114-8327-1ecf60933475"
                ]
            }
        }
    },
    "Resources": {
        "IAMR3JNYX": {
            "Type": "AWS::IAM::Role",
            "Properties": {
                "AssumeRolePolicyDocument": {
                    "Version": "2012-10-17",
                    "Statement": [
                        {
                            "Effect": "Allow",
                            "Principal": {
                                "Service": "lambda.amazonaws.com"
                            },
                            "Action": "sts:AssumeRole"
                        }
                    ]
                },
                "ManagedPolicyArns": [
                    "arn:aws:iam::aws:policy/CloudWatchLogsFullAccess"
                ],
                "Policies": [
                    {
                        "PolicyName": "s3BackupBucket",
                        "PolicyDocument": {
                            "Version": "2012-10-17",
                            "Statement": [
                                {
                                    "Effect": "Allow",
                                    "Action": [
                                        "s3:*"
                                    ],
                                    "Resource": {
                                        "Fn::Join": [
                                            "",
                                            [
                                                "*"
                                            ]
                                        ]
                                    }
                                },
                                {
                                    "Effect": "Allow",
                                    "Action": [
                                        "s3:*"
                                    ],
                                    "Resource": {
                                        "Fn::Join": [
                                            "",
                                            [
                                                "*"
                                            ]
                                        ]
                                    }
                                },
                                {
                                    "Action": [
                                        "logs:CreateLogGroup",
                                        "logs:CreateLogStream",
                                        "logs:PutLogEvents"
                                    ],
                                    "Effect": "Allow",
                                    "Resource": "arn:aws:logs:*:*:*"
                                }
                            ]
                        }
                    }
                ]
            },
            "Metadata": {
                "AWS::CloudFormation::Designer": {
                    "id": "d1498a15-7d12-4ec9-bba6-3ba163574a10"
                }
            }
        },
        "ER1SCU1": {
            "Type": "AWS::Events::Rule",
            "Properties": {
                "Description": "launch the lambda function every 10min",
                "Name": "eachDay",
                "ScheduleExpression": "cron(0/10 * ? * * *)",
                "State": "ENABLED",
                "RoleArn": {
                    "Fn::GetAtt": [
                        "IAMR25JO4",
                        "Arn"
                    ]
                },
                "Targets": [
                    {
                        "Arn": {
                            "Fn::GetAtt": [
                                "CreateBackUp",
                                "Arn"
                            ]
                        },
                        "Id": "CreateBackUp"
                    }
                ]
            },
            "Metadata": {
                "AWS::CloudFormation::Designer": {
                    "id": "c7843bb1-3134-44e7-9463-f9054118e52b"
                }
            }
        },
        "CreateBackUp": {
            "Type": "AWS::Lambda::Function",
            "Properties": {
                "Handler": "index.handler",
                "Runtime": "nodejs4.3",
                "Timeout": "76",
                "Role": {
                    "Fn::GetAtt": [
                        "IAMR3JNYX",
                        "Arn"
                    ]
                },
                "Code": {
                    "ZipFile": {
                        "Fn::Join": [
                            "",
                            [
                                "my function ..."
                            ]
                        ]
                    }
                }
            },
            "Metadata": {
                "AWS::CloudFormation::Designer": {
                    "id": "afe4f2cd-0634-4114-8327-1ecf60933475"
                }
            }
        },
        "IAMR25JO4": {
            "Type": "AWS::IAM::Role",
            "Properties": {
                "AssumeRolePolicyDocument": {
                    "Version": "2012-10-17",
                    "Statement": [
                        {
                            "Effect": "Allow",
                            "Principal": {
                                "Service": "events.amazonaws.com"
                            },
                            "Action": "sts:AssumeRole"
                        }
                    ]
                },
                "ManagedPolicyArns": [
                    "arn:aws:iam::aws:policy/CloudWatchLogsFullAccess"
                ],
                "Policies": [
                    {
                        "PolicyName": "InvokeBackUpLambda",
                        "PolicyDocument": {
                            "Version": "2012-10-17",
                            "Statement": [
                                {
                                    "Effect": "Allow",
                                    "Action": [
                                        "lambda:*"
                                    ],
                                    "Resource": {
                                        "Fn::GetAtt": [
                                            "CreateBackUp",
                                            "Arn"
                                        ]
                                    }
                                },
                                {
                                    "Action": [
                                        "logs:CreateLogGroup",
                                        "logs:CreateLogStream",
                                        "logs:PutLogEvents"
                                    ],
                                    "Effect": "Allow",
                                    "Resource": "arn:aws:logs:*:*:*"
                                }
                            ]
                        }
                    }
                ]
            },
            "Metadata": {
                "AWS::CloudFormation::Designer": {
                    "id": "40b5efaf-5cdd-449e-9155-177461dd4d8e"
                }
            }
        }
    }
}

Answer 1

有点晚了，但这里的基本问题是您缺少 AWS::Lambda:Permission 的条目。您需要创建一个条目，允许您的事件规则像这样调用您的 lambda（我更喜欢 yaml，但您明白了）：

LambdaInvokePermission:
  Type: "AWS::Lambda::Permission"
  Properties:
    FunctionName: !GetAtt
      - CreateBackUp
      - Arn
    Action: 'lambda:InvokeFunction'
    Principal: events.amazonaws.com
    SourceArn: !GetAtt
      - ER1SCU1
      - Arn