AWS::S3::Bucket

The AWS::S3::Bucket resource creates an Amazon Simple Storage Service (Amazon S3) bucket in the same AWS Region in which you create the AWS CloudFormation stack.

To control how AWS CloudFormation handles the bucket when the stack is deleted, you can set a deletion policy for your bucket. For Amazon S3 buckets, you can choose to retain the bucket or to delete the bucket. For more information, see DeletionPolicy Attribute.

Important

You can delete only empty buckets. Deletion will fail for buckets that have contents.

Topics

Syntax
Properties
Return Values
Examples
More Info

Syntax

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

JSON

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{
  "Type" : "AWS::S3::Bucket",
  "Properties" : {
    "AccessControl" : String,
    "BucketName" : String,
    "CorsConfiguration" : CORS Configuration,
    "LifecycleConfiguration" : Lifecycle Configuration,
    "LoggingConfiguration" : Logging Configuration,
    "MetricsConfigurations" : [ MetricsConfiguration, ... ]
    "NotificationConfiguration" : Notification Configuration,
    "ReplicationConfiguration" : Replication Configuration,
    "Tags" : [ Resource Tag, ... ],
    "VersioningConfiguration" : Versioning Configuration,
    "WebsiteConfiguration" : Website Configuration Type
  }
}

YAML

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Type: "AWS::S3::Bucket"
Properties: 
  AccessControl: String
  BucketName: String
  CorsConfiguration:
    CORS Configuration
  LifecycleConfiguration:
    Lifecycle Configuration
  LoggingConfiguration:
    Logging Configuration
  NotificationConfiguration:
    Notification Configuration
  MetricsConfigurations: 
    - MetricsConfiguration
  ReplicationConfiguration:
    Replication Configuration
  Tags:
    - Resource Tag
  VersioningConfiguration:
    Versioning Configuration
  WebsiteConfiguration:
    Website Configuration Type

Properties

AccessControl

A canned access control list (ACL) that grants predefined permissions to the bucket. For more information about canned ACLs, see Canned ACLs in the Amazon S3 documentation in the Amazon Simple Storage Service Developer Guide..

Required: No

Type: String

Update requires: No interruption

BucketName

A name for the bucket. If you don't specify a name, AWS CloudFormation generates a unique physical ID and uses that ID for the bucket name. For more information, see Name Type. The bucket name must contain only lowercase letters, numbers, periods (.), and dashes (-).

Important

If you specify a name, you cannot perform updates that require replacement of this resource. You can perform updates that require no or some interruption. If you must replace the resource, specify a new name.

Required: No

Type: String

Update requires: Replacement

CorsConfiguration

Rules that define cross-origin resource sharing of objects in this bucket. For more information, see Enabling Cross-Origin Resource Sharing in the Amazon Simple Storage Service Developer Guide.

Required: No

Type: Amazon S3 Cors Configuration

Update requires: No interruption

LifecycleConfiguration

Rules that define how Amazon S3 manages objects during their lifetime. For more information, see Object Lifecycle Management in the Amazon Simple Storage Service Developer Guide.

Required: No

Type: Amazon S3 Lifecycle Configuration

Update requires: No interruption

LoggingConfiguration

Settings that define where logs are stored.

Required: No

Type: Amazon S3 Logging Configuration

Update requires: No interruption

MetricsConfigurations

Settings that define a metrics configuration for the CloudWatch request metrics from the bucket.

Required: No

Type: List of Amazon S3 Bucket MetricsConfiguration

Update requires: No interruption

Duplicates not allowed.

NotificationConfiguration

Configuration that defines how Amazon S3 handles bucket notifications.

Required: No

Type: Amazon S3 NotificationConfiguration

Update requires: No interruption

ReplicationConfiguration

Configuration for replicating objects in an S3 bucket. To enable replication, you must also enable versioning by using the VersioningConfiguration property.

Amazon S3 can store replicated objects in only one destination (S3 bucket). The destination bucket must already exist and be in a different AWS Region than your source bucket.

Required: No

Type: Amazon S3 ReplicationConfiguration

Update requires: No interruption

Tags

An arbitrary set of tags (key-value pairs) for this S3 bucket.

Important

We recommend limiting the number of tags to seven. Applying more than seven tags prevents the AWS CLI and the AWS CloudFormation console and API actions from listing the tags for the S3 bucket.

Required: No

Type: AWS CloudFormation Resource Tags

Update requires: No interruption

VersioningConfiguration

Enables multiple variants of all objects in this bucket. You might enable versioning to prevent objects from being deleted or overwritten by mistake or to archive objects so that you can retrieve previous versions of them.

Required: No

Type: Amazon S3 Versioning Configuration

Update requires: No interruption

WebsiteConfiguration

Information used to configure the bucket as a static website. For more information, see Hosting Websites on Amazon S3.

Required: No

Type: Website Configuration Type

Update requires: No interruption

Return Values

Ref

When the logical ID of this resource is provided to the Ref intrinsic function, Ref returns the resource name.

Example: mystack-mybucket-kdwwxmddtr2g.

For more information about using the Ref function, see Ref.

Fn::GetAtt

Fn::GetAtt returns a value for a specified attribute of this type. The following are the available attributes and sample return values.

Arn

Returns the Amazon Resource Name (ARN) of the specified bucket.

Example: arn:aws:s3:::mybucket

DomainName

Returns the IPv4 DNS name of the specified bucket.

Example: mystack-mybucket-kdwwxmddtr2g.s3.amazonaws.com

DualStackDomainName

Returns the IPv6 DNS name of the specified bucket.

Example:mystack-mybucket-kdwwxmddtr2g.s3.dualstack.us-east-2.amazonaws.com/

For more information about dual-stack endpoints, see Using Amazon S3 Dual-Stack Endpoints.

WebsiteURL

Returns the Amazon S3 website endpoint for the specified bucket.

Example (IPv4): http://mystack-mybucket-kdwwxmddtr2g.s3-website-us-east-2.amazonaws.com/

Example (IPv6): http://mystack-mybucket-kdwwxmddtr2g.s3.dualstack.us-east-2.amazonaws.com/

For more information about using Fn::GetAtt, see Fn::GetAtt.

Examples

Associate a Replication Configuration IAM Role with an S3 Bucket

The following example creates an S3 bucket and grants it permission to write to a replication bucket by using an AWS Identity and Access Management (IAM) role. To avoid a circular dependency, the role's policy is declared as a separate resource. The bucket depends on the WorkItemBucketBackupRole role. If the policy is included in the role, the role also depends on the bucket.

JSON

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"RecordServiceS3Bucket": {
  "Type": "AWS::S3::Bucket",
  "DeletionPolicy": "Retain",
  "Properties": {
    "ReplicationConfiguration": {
      "Role": {
        "Fn::GetAtt": [
          "WorkItemBucketBackupRole",
          "Arn"
        ]
      },
      "Rules": [{
        "Destination": {
          "Bucket": {
            "Fn::Join": [ "", [
              "arn:aws:s3:::", {
                "Fn::Join": [ "-", [
                  { "Ref": "AWS::Region" },
                  { "Ref": "AWS::StackName" },
                  "replicationbucket"
                ]]
              }
            ]]
          },
          "StorageClass": "STANDARD"
        },
        "Id": "Backup",
        "Prefix": "",
        "Status": "Enabled"
      }]
    },
    "VersioningConfiguration": {
      "Status": "Enabled"
    }
  }
},
"WorkItemBucketBackupRole": {
  "Type": "AWS::IAM::Role",
  "Properties": {
    "AssumeRolePolicyDocument": {
      "Statement": [{
        "Action": [ "sts:AssumeRole" ],
        "Effect": "Allow",
        "Principal": {
          "Service": [ "s3.amazonaws.com" ]
        }
      }]
    }
  }    
},
"BucketBackupPolicy": {
  "Type": "AWS::IAM::Policy",
  "Properties": {
    "PolicyDocument": {
      "Statement": [{
        "Action": [
          "s3:GetReplicationConfiguration",
          "s3:ListBucket"
        ],
        "Effect": "Allow",
        "Resource": [{
          "Fn::Join": [ "", [
              "arn:aws:s3:::", {
                "Ref": "RecordServiceS3Bucket"
              }
            ]
          ]
        }]
      },{
        "Action": [
          "s3:GetObjectVersion",
          "s3:GetObjectVersionAcl"
        ],
        "Effect": "Allow",
        "Resource": [{
          "Fn::Join": [ "", [
              "arn:aws:s3:::", {
                "Ref": "RecordServiceS3Bucket"
              },
              "/*"
            ]
          ]
        }]
      }, {
        "Action": [
          "s3:ReplicateObject",
          "s3:ReplicateDelete"
        ],
        "Effect": "Allow",
        "Resource": [{
          "Fn::Join": [ "", [ 
             "arn:aws:s3:::", {
               "Fn::Join": [ "-", [ 
                 { "Ref": "AWS::Region" }, 
                 { "Ref": "AWS::StackName" }, 
                 "replicationbucket"
               ]]
             }, 
             "/*"
          ]]
        }]
      }]
    },
    "PolicyName": "BucketBackupPolicy",
    "Roles": [{
      "Ref": "WorkItemBucketBackupRole"
    }]
  }
}

YAML

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RecordServiceS3Bucket:
  Type: AWS::S3::Bucket
  DeletionPolicy: Retain
  Properties:
    ReplicationConfiguration:
      Role: !GetAtt [WorkItemBucketBackupRole, Arn]
      Rules:
      - Destination:
          Bucket: !Join ['', ['arn:aws:s3:::', !Join ['-', [!Ref 'AWS::Region', !Ref 'AWS::StackName',
                  replicationbucket]]]]
          StorageClass: STANDARD
        Id: Backup
        Prefix: ''
        Status: Enabled
    VersioningConfiguration:
      Status: Enabled
WorkItemBucketBackupRole:
  Type: AWS::IAM::Role
  Properties:
    AssumeRolePolicyDocument:
      Statement:
      - Action: ['sts:AssumeRole']
        Effect: Allow
        Principal:
          Service: [s3.amazonaws.com]
BucketBackupPolicy:
  Type: AWS::IAM::Policy
  Properties:
    PolicyDocument:
      Statement:
      - Action: ['s3:GetReplicationConfiguration', 's3:ListBucket']
        Effect: Allow
        Resource:
        - !Join ['', ['arn:aws:s3:::', !Ref 'RecordServiceS3Bucket']]
      - Action: ['s3:GetObjectVersion', 's3:GetObjectVersionAcl']
        Effect: Allow
        Resource:
        - !Join ['', ['arn:aws:s3:::', !Ref 'RecordServiceS3Bucket', /*]]
      - Action: ['s3:ReplicateObject', 's3:ReplicateDelete']
        Effect: Allow
        Resource:
        - !Join ['', ['arn:aws:s3:::', !Join ['-', [!Ref 'AWS::Region', !Ref 'AWS::StackName',
                replicationbucket]], /*]]
    PolicyName: BucketBackupPolicy
    Roles: [!Ref 'WorkItemBucketBackupRole']

Configure a Static Website with a Routing Rule

In this example, AWS::S3::Bucket's Fn::GetAtt values are used to provide outputs. If an HTTP 404 error occurs, the routing rule redirects requests to an EC2 instance and inserts the object key prefix report-404/ in the redirect. For example, if you request a page called ExamplePage.html and it results in a HTTP 404 error, the request is routed to a page called report-404/ExamplePage.html on the specified instance. For all other HTTP error codes, error.html is returned.

JSON

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"Resources" : {
   "S3Bucket" : {
      "Type" : "AWS::S3::Bucket",
      "Properties" : {
         "AccessControl" : "PublicRead",
         "BucketName" : "PublicBucket",
         "WebsiteConfiguration" : {
            "IndexDocument" : "index.html",
            "ErrorDocument" : "error.html",
            "RoutingRules": [
                {
                    "RoutingRuleCondition": {
                        "HttpErrorCodeReturnedEquals": "404",
                        "KeyPrefixEquals": "out1/"
                    },
                    "RedirectRule": {
                        "HostName": "ec2-11-22-333-44.compute-1.amazonaws.com",
                        "ReplaceKeyPrefixWith": "report-404/"
                    }
                }
            ]
         }
      },
      "DeletionPolicy" : "Retain"
   }
},

"Outputs" : {
   "WebsiteURL" : {
      "Value" : { "Fn::GetAtt" : [ "S3Bucket", "WebsiteURL" ] },
      "Description" : "URL for website hosted on S3"
   },
   "S3BucketSecureURL" : {
      "Value" : { "Fn::Join" : [
         "", [ "https://", { "Fn::GetAtt" : [ "S3Bucket", "DomainName" ] } ]
      ] },
      "Description" : "Name of S3 bucket to hold website content"
   }
}

YAML

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Resources:
  S3Bucket:
    Type: AWS::S3::Bucket
    Properties:
      AccessControl: PublicRead
      BucketName: PublicBucket
      WebsiteConfiguration:
        IndexDocument: index.html
        ErrorDocument: error.html
        RoutingRules:
        - RoutingRuleCondition:
            HttpErrorCodeReturnedEquals: '404'
            KeyPrefixEquals: out1/
          RedirectRule:
            HostName: ec2-11-22-333-44.compute-1.amazonaws.com
            ReplaceKeyPrefixWith: report-404/
    DeletionPolicy: Retain
Outputs:
  WebsiteURL:
    Value: !GetAtt [S3Bucket, WebsiteURL]
    Description: URL for website hosted on S3
  S3BucketSecureURL:
    Value: !Join ['', ['https://', !GetAtt [S3Bucket, DomainName]]]
    Description: Name of S3 bucket to hold website content

Enable Cross-Origin Resource Sharing

The following example template shows an S3 bucket with two cross-origin resource sharing rules.

JSON

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{
  "AWSTemplateFormatVersion": "2010-09-09",
  "Resources": {
        "S3Bucket": {
            "Type": "AWS::S3::Bucket",
            "Properties": {
                "AccessControl": "PublicReadWrite",
                "CorsConfiguration": {
                    "CorsRules": [
                        {
                            "AllowedHeaders": [
                                "*"
                            ],
                            "AllowedMethods": [
                                "GET"
                            ],
                            "AllowedOrigins": [
                                "*"
                            ],
                            "ExposedHeaders": [
                                "Date"
                            ],
                            "Id": "myCORSRuleId1",
                            "MaxAge": "3600"
                        },
                        {
                            "AllowedHeaders": [
                                "x-amz-*"
                            ],
                            "AllowedMethods": [
                                "DELETE"
                            ],
                            "AllowedOrigins": [
                                "http://www.example1.com",
                                "http://www.example2.com"
                            ],
                            "ExposedHeaders": [
                                "Connection",
                                "Server",
                                "Date"
                            ],
                            "Id": "myCORSRuleId2",
                            "MaxAge": "1800"
                        }
                    ]
                }
            }
        }
    },
    "Outputs": {
        "BucketName": {
            "Value": {
                "Ref": "S3Bucket"
            },
            "Description": "Name of the sample Amazon S3 bucket with CORS enabled."
        }
    }
}

YAML

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AWSTemplateFormatVersion: '2010-09-09'
Resources:
  S3Bucket:
    Type: AWS::S3::Bucket
    Properties:
      AccessControl: PublicReadWrite
      CorsConfiguration:
        CorsRules:
        - AllowedHeaders: ['*']
          AllowedMethods: [GET]
          AllowedOrigins: ['*']
          ExposedHeaders: [Date]
          Id: myCORSRuleId1
          MaxAge: '3600'
        - AllowedHeaders: [x-amz-*]
          AllowedMethods: [DELETE]
          AllowedOrigins: ['http://www.example1.com', 'http://www.example2.com']
          ExposedHeaders: [Connection, Server, Date]
          Id: myCORSRuleId2
          MaxAge: '1800'
Outputs:
  BucketName:
    Value: !Ref 'S3Bucket'
    Description: Name of the sample Amazon S3 bucket with CORS enabled.

Manage the Lifecycle for Amazon S3 Objects

The following example template shows an S3 bucket with a lifecycle configuration rule. The rule applies to all objects with the glacier key prefix. The objects are transitioned to Amazon Glacier after one day, and deleted after one year.

JSON

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{
    "AWSTemplateFormatVersion": "2010-09-09",
    "Resources": {
        "S3Bucket": {
            "Type": "AWS::S3::Bucket",
            "Properties": {
                "AccessControl": "PublicReadWrite",
                "LifecycleConfiguration": {
                    "Rules": [
                        {
                            "Id": "GlacierRule",
                            "Prefix": "glacier",
                            "Status": "Enabled",
                            "ExpirationInDays": "365",
                            "Transitions": [
                                {
                                  "TransitionInDays": "1",
                                  "StorageClass": "Glacier"
                                }
                            ]
                        }
                    ]
                }
            }
        }
    },
    "Outputs": {
        "BucketName": {
            "Value": {
                "Ref": "S3Bucket"
            },
            "Description": "Name of the sample Amazon S3 bucket with a lifecycle configuration."
        }
    }
}

YAML

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AWSTemplateFormatVersion: '2010-09-09'
Resources:
  S3Bucket:
    Type: AWS::S3::Bucket
    Properties:
      AccessControl: PublicReadWrite
      LifecycleConfiguration:
        Rules:
        - Id: GlacierRule
          Prefix: glacier
          Status: Enabled
          ExpirationInDays: '365'
          Transitions:
            - TransitionInDays: '1'
              StorageClass: Glacier
Outputs:
  BucketName:
    Value: !Ref 'S3Bucket'
    Description: Name of the sample Amazon S3 bucket with a lifecycle configuration.

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

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{
    "AWSTemplateFormatVersion": "2010-09-09",
    "Resources": {
        "S3Bucket": {
            "Type": "AWS::S3::Bucket",
            "Properties": {
                "AccessControl": "PublicRead",
                "LoggingConfiguration": {
                    "DestinationBucketName": {"Ref" : "LoggingBucket"},
                    "LogFilePrefix": "testing-logs"
                }
            }
        },
        "LoggingBucket": {
            "Type": "AWS::S3::Bucket",
            "Properties": {
                "AccessControl": "LogDeliveryWrite"
            }
        }
    },
    "Outputs": {
        "BucketName": {
            "Value": {
                "Ref": "S3Bucket"
            },
            "Description": "Name of the sample Amazon S3 bucket with a logging configuration."
        }
    }
}

YAML

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AWSTemplateFormatVersion: '2010-09-09'
Resources:
  S3Bucket:
    Type: AWS::S3::Bucket
    Properties:
      AccessControl: PublicRead
      LoggingConfiguration:
        DestinationBucketName: !Ref 'LoggingBucket'
        LogFilePrefix: testing-logs
  LoggingBucket:
    Type: AWS::S3::Bucket
    Properties:
      AccessControl: LogDeliveryWrite
Outputs:
  BucketName:
    Value: !Ref 'S3Bucket'
    Description: Name of the sample Amazon S3 bucket with a logging configuration.

Receive S3 Bucket Notifications to an SNS Topic

The following example template shows an S3 bucket with a notification configuration that sends an event to the specified SNS topic when Amazon S3 has lost all replicas of an object.

JSON

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{
    "AWSTemplateFormatVersion": "2010-09-09",
    "Resources": {
        "S3Bucket": {
            "Type": "AWS::S3::Bucket",
            "Properties": {
                "AccessControl": "PublicReadWrite",
                "NotificationConfiguration": {
                    "TopicConfigurations": [
                        {
                            "Topic": "arn:aws:sns:us-east-1:123456789012:TestTopic",
                            "Event": "s3:ReducedRedundancyLostObject"
                        }
                    ]
                }
            }
        }
    },
    "Outputs": {
        "BucketName": {
            "Value": {
                "Ref": "S3Bucket"
            },
            "Description": "Name of the sample Amazon S3 bucket with a notification configuration."
        }
    }
}

YAML

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AWSTemplateFormatVersion: '2010-09-09'
Resources:
  S3Bucket:
    Type: AWS::S3::Bucket
    Properties:
      AccessControl: PublicReadWrite
      NotificationConfiguration:
        TopicConfigurations:
        - Topic: arn:aws:sns:us-east-1:123456789012:TestTopic
          Event: s3:ReducedRedundancyLostObject
Outputs:
  BucketName:
    Value: !Ref 'S3Bucket'
    Description: Name of the sample Amazon S3 bucket with a notification configuration.

Replicate Objects and Store Them in Another S3 Bucket

The following example includes two replication rules. Amazon S3 replicates objects with the MyPrefix or MyOtherPrefix prefixes and stores them in the my-replication-bucket bucket, which must be in a different AWS Region than the S3Bucket bucket.

JSON

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"S3Bucket": {
  "Type": "AWS::S3::Bucket",
  "Properties": {
    "VersioningConfiguration":{
      "Status":"Enabled"
    },
    "ReplicationConfiguration": {
      "Role": "arn:aws:iam::123456789012:role/replication_role",
      "Rules": [
        {
          "Id": "MyRule1",
          "Status": "Enabled",
          "Prefix": "MyPrefix",
          "Destination": {
            "Bucket": "arn:aws:s3:::my-replication-bucket",
            "StorageClass": "STANDARD"
          }
        },
        {
          "Status": "Enabled",
          "Prefix": "MyOtherPrefix",
          "Destination": {
            "Bucket": "arn:aws:s3:::my-replication-bucket"
          }
        }
      ]
    }
  }
}

YAML

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S3Bucket:
  Type: AWS::S3::Bucket
  Properties:
    VersioningConfiguration:
      Status: Enabled
    ReplicationConfiguration:
      Role: arn:aws:iam::123456789012:role/replication_role
      Rules:
      - Id: MyRule1
        Status: Enabled
        Prefix: MyPrefix
        Destination:
          Bucket: arn:aws:s3:::my-replication-bucket
          StorageClass: STANDARD
      - Status: Enabled
        Prefix: MyOtherPrefix
        Destination:
          Bucket: arn:aws:s3:::my-replication-bucket

More Info

For more examples, see Amazon S3 Template Snippets.
DeletionPolicy Attribute
Access Control List (ACL) Overview in the Amazon Simple Storage Service Developer Guide
Hosting a Static Website on Amazon S3 in the Amazon Simple Storage Service Developer Guide

Document Conventions

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