Create test.tf #2
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WalkthroughA Terraform configuration was introduced to provision an AWS S3 bucket with secure settings. The setup enforces versioning, private access, server-side encryption, and cross-account access denial. Variables allow customization of the bucket name, AWS region, and environment. An output exposes the created bucket's name. Changes
Sequence Diagram(s)sequenceDiagram
participant User
participant Terraform
participant AWS
User->>Terraform: Apply configuration (with variables)
Terraform->>AWS: Create S3 bucket (private, encrypted, versioned)
Terraform->>AWS: Attach bucket policy (deny cross-account access)
AWS-->>Terraform: Confirm resources created
Terraform-->>User: Output bucket name
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Actionable comments posted: 1
🧹 Nitpick comments (1)
test.tf (1)
18-43: Enhance S3 Bucket Security and Lifecycle Management
Consider adding alifecycle_ruleblock to manage object expiration and noncurrent version cleanup to avoid unbounded storage growth (Checkov CKV2_AWS_61). Additionally, it's best practice to enforce account-level public access blocking withaws_s3_bucket_public_access_block.Example additions:
resource "aws_s3_bucket" "bucket" { bucket = var.bucket_name acl = "private" versioning { enabled = true } server_side_encryption_configuration { rule { apply_server_side_encryption_by_default { sse_algorithm = "AES256" } } } tags = { Name = var.bucket_name Environment = var.environment ManagedBy = "Terraform" } + lifecycle_rule { + id = "expire-old-objects" + enabled = true + expiration { + days = 365 + } + noncurrent_version_expiration { + days = 90 + } + } } + +resource "aws_s3_bucket_public_access_block" "block" { + bucket = aws_s3_bucket.bucket.id + block_public_acls = true + block_public_policy = true + ignore_public_acls = true + restrict_public_buckets = true +}🧰 Tools
🪛 Checkov (3.2.334)
[MEDIUM] 18-43: Ensure that an S3 bucket has a lifecycle configuration
(CKV2_AWS_61)
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test.tf(1 hunks)
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🪛 Checkov (3.2.334)
test.tf
[MEDIUM] 18-43: Ensure that an S3 bucket has a lifecycle configuration
(CKV2_AWS_61)
🔇 Additional comments (5)
test.tf (5)
1-9: Terraform Version and Provider Constraints Look Good
The configuration correctly pins Terraform to ≥1.6 and locks the AWS provider to ~>5.0, ensuring compatibility and preventing unexpected upgrades.
11-13: AWS Provider Configuration is Correct
Usingvar.aws_regionprovides flexible region selection. Ensure that this variable is set or defaults to a valid AWS region.
72-75: Bucket Policy Attachment is Correct
Theaws_s3_bucket_policyresource correctly attaches the generated policy to the bucket.
80-95: Variable Declarations are Sound
Variables forbucket_name,aws_region, andenvironmentare well-defined with sensible defaults and clear descriptions.
100-103: Output Declaration is Appropriate
Exposing the bucket's ID via thebucket_nameoutput is useful for downstream modules or users.
| data "aws_iam_policy_document" "deny_cross_account" { | ||
| statement { | ||
| sid = "DenyCrossAccountAccess" | ||
| effect = "Deny" | ||
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| principals { | ||
| type = "*" | ||
| identifiers = ["*"] | ||
| } | ||
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| actions = ["s3:*"] | ||
| resources = [ | ||
| aws_s3_bucket.bucket.arn, | ||
| "${aws_s3_bucket.bucket.arn}/*", | ||
| ] | ||
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| condition { | ||
| test = "StringNotEquals" | ||
| variable = "aws:PrincipalAccount" | ||
| values = [data.aws_caller_identity.current.account_id] | ||
| } | ||
| } | ||
| } |
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Missing aws_caller_identity Data Source for Policy Condition
The policy references data.aws_caller_identity.current.account_id, but no aws_caller_identity data block is defined. This will cause a Terraform plan error.
Add the following near the top of the file (e.g., after the provider block):
data "aws_caller_identity" "current" {}1 participant
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