AWS::S3::Bucket LoggingConfiguration - Amazon CloudFormation
SyntaxPropertiesExamples
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AWS::S3::Bucket LoggingConfiguration

Describes where logs are stored and the prefix that Amazon S3 assigns to all log object keys for a bucket. For examples and more information, see PUT Bucket logging in the Amazon S3 API Reference.

Note

To successfully complete the AWS::S3::Bucket LoggingConfiguration request, you must have s3:PutObject and s3:PutObjectAcl in your IAM permissions.

Syntax

To declare this entity in your Amazon CloudFormation template, use the following syntax:

JSON

{
  "DestinationBucketName" : String,
  "LogFilePrefix" : String
}

YAML

  DestinationBucketName: String
  LogFilePrefix: String

Properties

DestinationBucketName

The name of the bucket where Amazon S3 should store server access log files. You can store log files in any bucket that you own. By default, logs are stored in the bucket where the LoggingConfiguration property is defined.

Required: No

Type: String

Update requires: No interruption

LogFilePrefix

A prefix for all log object keys. If you store log files from multiple Amazon S3 buckets in a single bucket, you can use a prefix to distinguish which log files came from which bucket.

Required: No

Type: String

Update requires: No interruption

Examples

Log access requests for a specific S3 bucket

The following example template creates two S3 buckets. The LoggingBucket bucket store the logs from the S3Bucket bucket. To receive logs from the S3Bucket bucket, the logging bucket requires log delivery write permissions.

JSON

{
    "AWSTemplateFormatVersion": "2010-09-09",
    "Resources": {
        "S3Bucket": {
            "Type": "AWS::S3::Bucket",
            "Properties": {
                "LoggingConfiguration": {
                    "DestinationBucketName": {
                        "Ref": "LoggingBucket"
                    },
                    "LogFilePrefix": "testing-logs"
                }
            }
        },
        "LoggingBucket": {
            "Type": "AWS::S3::Bucket"
        },
        "S3BucketPolicy": {
            "Type": "AWS::S3::BucketPolicy",
            "Properties": {
                "Bucket": {
                    "Ref": "LoggingBucket"
                },
                "PolicyDocument": {
                    "Version": "2012-10-17",
                    "Statement": [
                        {
                            "Action": [
                                "s3:PutObject"
                            ],
                            "Effect": "Allow",
                            "Principal": {
                                "Service": "logging.s3.amazonaws.com"
                            },
                            "Resource": {
                                "Fn::Join": [
                                    "",
                                    [
                                        "arn:aws:s3:::",
                                        {
                                            "Ref": "LoggingBucket"
                                        },
                                        "/*"
                                    ]
                                ]
                            },
                            "Condition": {
                                "ArnLike": {
                                    "aws:SourceArn": {
                                        "Fn::GetAtt": [
                                            "S3Bucket",
                                            "Arn"
                                        ]
                                    }
                                },
                                "StringEquals": {
                                    "aws:SourceAccount": {
                                        "Fn::Sub": "${AWS::AccountId}"
                                    }
                                }
                            }
                        }
                    ]
                }
            }
        }
    },
    "Outputs": {
        "BucketName": {
            "Value": {
                "Ref": "S3Bucket"
            },
            "Description": "Name of the sample Amazon S3 bucket with a logging configuration."
        }
    }
}

YAML

AWSTemplateFormatVersion: 2010-09-09
Resources:
  S3Bucket:
    Type: 'AWS::S3::Bucket'
    Properties:
      LoggingConfiguration:
        DestinationBucketName: !Ref LoggingBucket
        LogFilePrefix: testing-logs
  LoggingBucket:
    Type: 'AWS::S3::Bucket'
  S3BucketPolicy:
    Type: 'AWS::S3::BucketPolicy'
    Properties:
      Bucket: !Ref LoggingBucket
      PolicyDocument:
        Version: 2012-10-17
        Statement:
          - Action:
              - 's3:PutObject'
            Effect: Allow
            Principal:
              Service: logging.s3.amazonaws.com
            Resource: !Join 
              - ''
              - - 'arn:aws:s3:::'
                - !Ref LoggingBucket
                - /*
            Condition:
              ArnLike:
                'aws:SourceArn': !GetAtt 
                  - S3Bucket
                  - Arn
              StringEquals:
                'aws:SourceAccount': !Sub '${AWS::AccountId}'
Outputs:
  BucketName:
    Value: !Ref S3Bucket
    Description: Name of the sample Amazon S3 bucket with a logging configuration.