This module creates an S3 bucket with support for versioning, lifecycles, object locks, replication, encryption, ACL, bucket object policies, and static website hosting.
If user_enabled
variable is set to true
, the module will provision a basic IAM user with permissions to access the bucket.
This basic IAM system user is suitable for CI/CD systems (e.g. TravisCI, CircleCI) or systems which are external to AWS that cannot leverage
AWS IAM Instance Profiles
or AWS OIDC to authenticate and
do not already have IAM credentials. Users or systems that have IAM credentials should either be granted access directly based on
their IAM identity via privileged_principal_arns
or be allowed to assume an IAM role with access.
We do not recommend creating IAM users this way for any other purpose.
This module blocks public access to the bucket by default. See block_public_acls
, block_public_policy
,
ignore_public_acls
, and restrict_public_buckets
to change the settings. See AWS documentation
for more details.
If an IAM user is created, the IAM user name is constructed using terraform-null-label
and some input is required. The simplest input is name
. By default the name will be converted to lower case
and all non-alphanumeric characters except for hyphen will be removed. See the documentation for terraform-null-label
to learn how to override these defaults if desired.
If an AWS Access Key is created, it is stored either in SSM Parameter Store or is provided as a module output, but not both. Using SSM Parameter Store is recommended because module outputs are stored in plaintext in the Terraform state file.
This project is part of our comprehensive "SweetOps" approach towards DevOps.
It's 100% Open Source and licensed under the APACHE2.
We literally have hundreds of terraform modules that are Open Source and well-maintained. Check them out!
Security scanning is graciously provided by Bridgecrew. Bridgecrew is the leading fully hosted, cloud-native solution providing continuous Terraform security and compliance.
IMPORTANT: We do not pin modules to versions in our examples because of the difficulty of keeping the versions in the documentation in sync with the latest released versions. We highly recommend that in your code you pin the version to the exact version you are using so that your infrastructure remains stable, and update versions in a systematic way so that they do not catch you by surprise.
Also, because of a bug in the Terraform registry (hashicorp/terraform#21417), the registry shows many of our inputs as required when in fact they are optional. The table below correctly indicates which inputs are required.
Using a canned ACL.
module "s3_bucket" {
source = "cloudposse/s3-bucket/aws"
# Cloud Posse recommends pinning every module to a specific version
# version = "x.x.x"
name = "app"
stage = "test"
namespace = "eg"
acl = "private"
enabled = true
user_enabled = false
versioning_enabled = false
privileged_principal_actions = ["s3:GetObject", "s3:ListBucket", "s3:GetBucketLocation"]
privileged_principal_arns = [
{
(local.deployment_iam_role_arn) = [""]
},
{
(local.additional_deployment_iam_role_arn) = ["prefix1/", "prefix2/"]
}
]
}
Configuring S3 storage lifecycle:
locals {
lifecycle_configuration_rules = [{
enabled = true # bool
id = "v2rule"
abort_incomplete_multipart_upload_days = 1 # number
filter_and = null
expiration = {
days = 120 # integer > 0
}
noncurrent_version_expiration = {
newer_noncurrent_versions = 3 # integer > 0
noncurrent_days = 60 # integer >= 0
}
transition = [{
days = 30 # integer >= 0
storage_class = "STANDARD_IA" # string/enum, one of GLACIER, STANDARD_IA, ONEZONE_IA, INTELLIGENT_TIERING, DEEP_ARCHIVE, GLACIER_IR.
},
{
days = 60 # integer >= 0
storage_class = "ONEZONE_IA" # string/enum, one of GLACIER, STANDARD_IA, ONEZONE_IA, INTELLIGENT_TIERING, DEEP_ARCHIVE, GLACIER_IR.
}]
noncurrent_version_transition = [{
newer_noncurrent_versions = 3 # integer >= 0
noncurrent_days = 30 # integer >= 0
storage_class = "ONEZONE_IA" # string/enum, one of GLACIER, STANDARD_IA, ONEZONE_IA, INTELLIGENT_TIERING, DEEP_ARCHIVE, GLACIER_IR.
}]
}]
}
Using grants to enable access to another account and for logging, and incorporating the above lifecycle configuration.
module "s3_bucket" {
source = "cloudposse/s3-bucket/aws"
# Cloud Posse recommends pinning every module to a specific version
# version = "x.x.x"
name = "app"
stage = "test"
namespace = "eg"
acl = ""
enabled = true
user_enabled = false
versioning_enabled = true
lifecycle_configuration_rules = local.lifecycle_configuration_rules
grants = [
{
id = "012abc345def678ghi901" # Canonical user or account id
type = "CanonicalUser"
permissions = ["FULL_CONTROL"]
uri = null
},
{
id = null
type = "Group"
permissions = ["READ", "WRITE"]
uri = "http://acs.amazonaws.com/groups/s3/LogDelivery"
},
]
}
Allowing specific principal ARNs to perform actions on the bucket:
module "s3_bucket" {
source = "cloudposse/s3-bucket/aws"
# Cloud Posse recommends pinning every module to a specific version
# version = "x.x.x"
acl = "private"
enabled = true
user_enabled = true
versioning_enabled = false
allowed_bucket_actions = ["s3:GetObject", "s3:ListBucket", "s3:GetBucketLocation"]
name = "app"
stage = "test"
namespace = "eg"
privileged_principal_arns = [
{
"arn:aws:iam::123456789012:role/principal1" = ["prefix1/", "prefix2/"]
}, {
"arn:aws:iam::123456789012:role/principal2" = [""]
}]
privileged_principal_actions = [
"s3:PutObject",
"s3:PutObjectAcl",
"s3:GetObject",
"s3:DeleteObject",
"s3:ListBucket",
"s3:ListBucketMultipartUploads",
"s3:GetBucketLocation",
"s3:AbortMultipartUpload"
]
}
Available targets:
help Help screen
help/all Display help for all targets
help/short This help short screen
lint Lint terraform code
test/% Run Terraform commands in the examples/complete folder; e.g. make test/plan
Name | Version |
---|---|
terraform | >= 1.0 |
aws | >= 4.9.0 |
time | >= 0.7 |
Name | Version |
---|---|
aws | >= 4.9.0 |
time | >= 0.7 |
Name | Source | Version |
---|---|---|
s3_user | cloudposse/iam-s3-user/aws | 1.0.0 |
this | cloudposse/label/null | 0.25.0 |
Name | Description | Type | Default | Required |
---|---|---|---|---|
access_key_enabled | Set to true to create an IAM Access Key for the created IAM user |
bool |
true |
no |
acl | The canned ACL to apply. We recommend private to avoid exposing sensitive information. Conflicts with grants . |
string |
"private" |
no |
additional_tag_map | Additional key-value pairs to add to each map in tags_as_list_of_maps . Not added to tags or id .This is for some rare cases where resources want additional configuration of tags and therefore take a list of maps with tag key, value, and additional configuration. |
map(string) |
{} |
no |
allow_encrypted_uploads_only | Set to true to prevent uploads of unencrypted objects to S3 bucket |
bool |
false |
no |
allow_ssl_requests_only | Set to true to require requests to use Secure Socket Layer (HTTPS/SSL). This will explicitly deny access to HTTP requests |
bool |
false |
no |
allowed_bucket_actions | List of actions the user is permitted to perform on the S3 bucket | list(string) |
[ |
no |
attributes | ID element. Additional attributes (e.g. workers or cluster ) to add to id ,in the order they appear in the list. New attributes are appended to the end of the list. The elements of the list are joined by the delimiter and treated as a single ID element. |
list(string) |
[] |
no |
block_public_acls | Set to false to disable the blocking of new public access lists on the bucket |
bool |
true |
no |
block_public_policy | Set to false to disable the blocking of new public policies on the bucket |
bool |
true |
no |
bucket_key_enabled | Set this to true to use Amazon S3 Bucket Keys for SSE-KMS, which reduce the cost of AWS KMS requests. For more information, see: https://docs.aws.amazon.com/AmazonS3/latest/userguide/bucket-key.html |
bool |
false |
no |
bucket_name | Bucket name. If provided, the bucket will be created with this name instead of generating the name from the context | string |
null |
no |
context | Single object for setting entire context at once. See description of individual variables for details. Leave string and numeric variables as null to use default value.Individual variable settings (non-null) override settings in context object, except for attributes, tags, and additional_tag_map, which are merged. |
any |
{ |
no |
cors_configuration | Specifies the allowed headers, methods, origins and exposed headers when using CORS on this bucket | list(object({ |
[] |
no |
delimiter | Delimiter to be used between ID elements. Defaults to - (hyphen). Set to "" to use no delimiter at all. |
string |
null |
no |
descriptor_formats | Describe additional descriptors to be output in the descriptors output map.Map of maps. Keys are names of descriptors. Values are maps of the form {<br> format = string<br> labels = list(string)<br>} (Type is any so the map values can later be enhanced to provide additional options.)format is a Terraform format string to be passed to the format() function.labels is a list of labels, in order, to pass to format() function.Label values will be normalized before being passed to format() so they will beidentical to how they appear in id .Default is {} (descriptors output will be empty). |
any |
{} |
no |
enabled | Set to false to prevent the module from creating any resources | bool |
null |
no |
environment | ID element. Usually used for region e.g. 'uw2', 'us-west-2', OR role 'prod', 'staging', 'dev', 'UAT' | string |
null |
no |
force_destroy | When true , permits a non-empty S3 bucket to be deleted by first deleting all objects in the bucket.THESE OBJECTS ARE NOT RECOVERABLE even if they were versioned and stored in Glacier. |
bool |
false |
no |
grants | A list of policy grants for the bucket, taking a list of permissions. Conflicts with acl . Set acl to null to use this. |
list(object({ |
[] |
no |
id_length_limit | Limit id to this many characters (minimum 6).Set to 0 for unlimited length.Set to null for keep the existing setting, which defaults to 0 .Does not affect id_full . |
number |
null |
no |
ignore_public_acls | Set to false to disable the ignoring of public access lists on the bucket |
bool |
true |
no |
kms_master_key_arn | The AWS KMS master key ARN used for the SSE-KMS encryption. This can only be used when you set the value of sse_algorithm as aws:kms . The default aws/s3 AWS KMS master key is used if this element is absent while the sse_algorithm is aws:kms |
string |
"" |
no |
label_key_case | Controls the letter case of the tags keys (label names) for tags generated by this module.Does not affect keys of tags passed in via the tags input.Possible values: lower , title , upper .Default value: title . |
string |
null |
no |
label_order | The order in which the labels (ID elements) appear in the id .Defaults to ["namespace", "environment", "stage", "name", "attributes"]. You can omit any of the 6 labels ("tenant" is the 6th), but at least one must be present. |
list(string) |
null |
no |
label_value_case | Controls the letter case of ID elements (labels) as included in id ,set as tag values, and output by this module individually. Does not affect values of tags passed in via the tags input.Possible values: lower , title , upper and none (no transformation).Set this to title and set delimiter to "" to yield Pascal Case IDs.Default value: lower . |
string |
null |
no |
labels_as_tags | Set of labels (ID elements) to include as tags in the tags output.Default is to include all labels. Tags with empty values will not be included in the tags output.Set to [] to suppress all generated tags.Notes: The value of the name tag, if included, will be the id , not the name .Unlike other null-label inputs, the initial setting of labels_as_tags cannot bechanged in later chained modules. Attempts to change it will be silently ignored. |
set(string) |
[ |
no |
lifecycle_configuration_rules | A list of lifecycle V2 rules | list(object({ |
[] |
no |
lifecycle_rule_ids | DEPRECATED (use lifecycle_configuration_rules ): A list of IDs to assign to corresponding lifecycle_rules |
list(string) |
[] |
no |
lifecycle_rules | DEPRECATED (use lifecycle_configuration_rules ): A list of lifecycle rules |
list(object({ |
null |
no |
logging | Bucket access logging configuration. | object({ |
null |
no |
name | ID element. Usually the component or solution name, e.g. 'app' or 'jenkins'. This is the only ID element not also included as a tag .The "name" tag is set to the full id string. There is no tag with the value of the name input. |
string |
null |
no |
namespace | ID element. Usually an abbreviation of your organization name, e.g. 'eg' or 'cp', to help ensure generated IDs are globally unique | string |
null |
no |
object_lock_configuration | A configuration for S3 object locking. With S3 Object Lock, you can store objects using a write once, read many (WORM) model. Object Lock can help prevent objects from being deleted or overwritten for a fixed amount of time or indefinitely. |
object({ |
null |
no |
policy | DEPRECATED (use source_policy_documents ): A valid bucket policy JSON document. Note that if the policy document is not specific enough (but still valid), Terraform may view the policy as constantly changing in a terraform plan. In this case, please make sure you use the verbose/specific version of the policy |
string |
"" |
no |
privileged_principal_actions | List of actions to permit privileged_principal_arns to perform on bucket and bucket prefixes (see privileged_principal_arns ) |
list(string) |
[] |
no |
privileged_principal_arns | List of maps. Each map has a key, an IAM Principal ARN, whose associated value is a list of S3 path prefixes to grant privileged_principal_actions permissions for that principal,in addition to the bucket itself, which is automatically included. Prefixes should not begin with '/'. |
list(map(list(string))) |
[] |
no |
regex_replace_chars | Terraform regular expression (regex) string. Characters matching the regex will be removed from the ID elements. If not set, "/[^a-zA-Z0-9-]/" is used to remove all characters other than hyphens, letters and digits. |
string |
null |
no |
replication_rules | DEPRECATED (use s3_replication_rules ): Specifies the replication rules for S3 bucket replication if enabled. You must also set s3_replication_enabled to true. |
list(any) |
null |
no |
restrict_public_buckets | Set to false to disable the restricting of making the bucket public |
bool |
true |
no |
s3_object_ownership | Specifies the S3 object ownership control. Valid values are ObjectWriter , BucketOwnerPreferred , and 'BucketOwnerEnforced'. |
string |
"ObjectWriter" |
no |
s3_replica_bucket_arn | A single S3 bucket ARN to use for all replication rules. Note: The destination bucket can be specified in the replication rule itself (which allows for multiple destinations), in which case it will take precedence over this variable. |
string |
"" |
no |
s3_replication_enabled | Set this to true and specify s3_replication_rules to enable replication. versioning_enabled must also be true . |
bool |
false |
no |
s3_replication_rules | Specifies the replication rules for S3 bucket replication if enabled. You must also set s3_replication_enabled to true. | list(any) |
null |
no |
s3_replication_source_roles | Cross-account IAM Role ARNs that will be allowed to perform S3 replication to this bucket (for replication within the same AWS account, it's not necessary to adjust the bucket policy). | list(string) |
[] |
no |
source_policy_documents | List of IAM policy documents that are merged together into the exported document. Statements defined in source_policy_documents or source_json must have unique SIDs. Statement having SIDs that match policy SIDs generated by this module will override them. |
list(string) |
[] |
no |
sse_algorithm | The server-side encryption algorithm to use. Valid values are AES256 and aws:kms |
string |
"AES256" |
no |
ssm_base_path | The base path for SSM parameters where created IAM user's access key is stored | string |
"/s3_user/" |
no |
stage | ID element. Usually used to indicate role, e.g. 'prod', 'staging', 'source', 'build', 'test', 'deploy', 'release' | string |
null |
no |
store_access_key_in_ssm | Set to true to store the created IAM user's access key in SSM Parameter Store,false to store them in Terraform state as outputs.Since Terraform state would contain the secrets in plaintext, use of SSM Parameter Store is recommended. |
bool |
false |
no |
tags | Additional tags (e.g. {'BusinessUnit': 'XYZ'} ).Neither the tag keys nor the tag values will be modified by this module. |
map(string) |
{} |
no |
tenant | ID element _(Rarely used, not included by default)_. A customer identifier, indicating who this instance of a resource is for | string |
null |
no |
transfer_acceleration_enabled | Set this to true to enable S3 Transfer Acceleration for the bucket. | bool |
false |
no |
user_enabled | Set to true to create an IAM user with permission to access the bucket |
bool |
false |
no |
versioning_enabled | A state of versioning. Versioning is a means of keeping multiple variants of an object in the same bucket | bool |
true |
no |
website_configuration | Specifies the static website hosting configuration object | list(object({ |
[] |
no |
website_redirect_all_requests_to | If provided, all website requests will be redirected to the specified host name and protocol | list(object({ |
[] |
no |
Name | Description |
---|---|
access_key_id | The access key ID, if var.user_enabled && var.access_key_enabled .While sensitive, it does not need to be kept secret, so this is output regardless of var.store_access_key_in_ssm . |
access_key_id_ssm_path | The SSM Path under which the S3 User's access key ID is stored |
bucket_arn | Bucket ARN |
bucket_domain_name | FQDN of bucket |
bucket_id | Bucket Name (aka ID) |
bucket_region | Bucket region |
bucket_regional_domain_name | The bucket region-specific domain name |
bucket_website_domain | The bucket website domain, if website is enabled |
bucket_website_endpoint | The bucket website endpoint, if website is enabled |
enabled | Is module enabled |
replication_role_arn | The ARN of the replication IAM Role |
secret_access_key | The secret access key, if var.user_enabled && var.access_key_enabled && !var.store_access_key_in_ssm .This will be written to the state file unencrypted, so using store_access_key_in_ssm is recommended" |
secret_access_key_ssm_path | The SSM Path under which the S3 User's secret access key is stored |
user_arn | The ARN assigned by AWS for the user |
user_enabled | Is user creation enabled |
user_name | Normalized IAM user name |
user_unique_id | The user unique ID assigned by AWS |
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Check out these related projects.
- terraform-aws-cloudfront-s3-cdn - Terraform module to easily provision CloudFront CDN backed by an S3 origin
- terraform-aws-s3-website - Terraform Module for Creating S3 backed Websites and Route53 DNS
- terraform-aws-user-data-s3-backend - Terraform Module to Offload User Data to S3
- terraform-aws-s3-logs-athena-query - A Terraform module that creates an Athena Database and Structure for querying S3 access logs
- terraform-aws-lb-s3-bucket - Terraform module to provision an S3 bucket with built in IAM policy to allow AWS Load Balancers to ship access logs
- terraform-aws-s3-log-storage - Terraform module creates an S3 bucket suitable for receiving logs from other AWS services such as S3, CloudFront, and CloudTrail
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