syslog-server/terraform/s3.tf

resource "aws_s3_bucket" "unifi" {
  bucket = local.bucket_name

  tags = {
    Name = local.bucket_name
  }
}

resource "aws_s3_bucket_public_access_block" "unifi" {
  bucket = aws_s3_bucket.unifi.id

  block_public_acls       = true
  block_public_policy     = true
  ignore_public_acls      = true
  restrict_public_buckets = true
}

resource "aws_s3_bucket_ownership_controls" "unifi" {
  bucket = aws_s3_bucket.unifi.id

  rule {
    object_ownership = "BucketOwnerEnforced"
  }
}

resource "aws_s3_bucket_server_side_encryption_configuration" "unifi" {
  bucket = aws_s3_bucket.unifi.id

  rule {
    apply_server_side_encryption_by_default {
      sse_algorithm = "AES256"
    }
  }
}

resource "aws_s3_bucket_lifecycle_configuration" "unifi" {
  bucket = aws_s3_bucket.unifi.id

  rule {
    id     = "expire-logs"
    status = "Enabled"

    filter {
      prefix = "format="
    }

    expiration {
      days = local.logs_expire_days
    }
  }

  rule {
    id     = "expire-athena-results"
    status = "Enabled"

    filter {
      prefix = local.athena_results_prefix
    }

    expiration {
      days = local.athena_results_expire_days
    }
  }

  rule {
    id     = "expire-errors"
    status = "Enabled"

    filter {
      prefix = "errors/"
    }

    expiration {
      days = 14
    }
  }
}

data "aws_iam_policy_document" "bucket" {
  statement {
    sid     = "DenyInsecureTransport"
    effect  = "Deny"
    actions = ["s3:*"]

    principals {
      type        = "*"
      identifiers = ["*"]
    }

    resources = [
      aws_s3_bucket.unifi.arn,
      "${aws_s3_bucket.unifi.arn}/*",
    ]

    condition {
      test     = "Bool"
      variable = "aws:SecureTransport"
      values   = ["false"]
    }
  }
}

resource "aws_s3_bucket_policy" "unifi" {
  bucket = aws_s3_bucket.unifi.id
  policy = data.aws_iam_policy_document.bucket.json
}