| 1 | # 🤖 The fleet-backup bucket: Litestream on the router box streams every |
| 2 | # instance DB (plus home/push/cloud/registry) here, one prefix per database. |
| 3 | # Versioning is the ransomware posture — an overwrite or delete with the |
| 4 | # box's credentials leaves noncurrent versions recoverable for 14 days, and |
| 5 | # the box's IAM user (below) cannot touch versioning, lifecycle, or the |
| 6 | # bucket itself. |
| 7 | |
| 8 | resource "aws_s3_bucket" "fleet_backup" { |
| 9 | bucket = "eleven-prod-fleet-backup-${local.account_id}" |
| 10 | } |
| 11 | |
| 12 | resource "aws_s3_bucket_versioning" "fleet_backup" { |
| 13 | bucket = aws_s3_bucket.fleet_backup.id |
| 14 | |
| 15 | versioning_configuration { |
| 16 | status = "Enabled" |
| 17 | } |
| 18 | } |
| 19 | |
| 20 | resource "aws_s3_bucket_lifecycle_configuration" "fleet_backup" { |
| 21 | bucket = aws_s3_bucket.fleet_backup.id |
| 22 | |
| 23 | rule { |
| 24 | id = "expire-noncurrent-14d" |
| 25 | status = "Enabled" |
| 26 | |
| 27 | filter {} |
| 28 | |
| 29 | noncurrent_version_expiration { |
| 30 | noncurrent_days = 14 |
| 31 | } |
| 32 | } |
| 33 | } |
| 34 | |
| 35 | resource "aws_s3_bucket_public_access_block" "fleet_backup" { |
| 36 | bucket = aws_s3_bucket.fleet_backup.id |
| 37 | |
| 38 | block_public_acls = true |
| 39 | block_public_policy = true |
| 40 | ignore_public_acls = true |
| 41 | restrict_public_buckets = true |
| 42 | } |
| 43 | |
| 44 | # TLS-only: deny any request arriving over plain HTTP. Litestream and the |
| 45 | # vault sync both speak HTTPS already — this turns that assumption into |
| 46 | # policy. A deny-only statement grants nothing public, so it attaches fine |
| 47 | # under the full access block above. |
| 48 | data "aws_iam_policy_document" "fleet_backup_tls_only" { |
| 49 | statement { |
| 50 | sid = "DenyInsecureTransport" |
| 51 | effect = "Deny" |
| 52 | actions = ["s3:*"] |
| 53 | resources = [ |
| 54 | aws_s3_bucket.fleet_backup.arn, |
| 55 | "${aws_s3_bucket.fleet_backup.arn}/*", |
| 56 | ] |
| 57 | |
| 58 | principals { |
| 59 | type = "*" |
| 60 | identifiers = ["*"] |
| 61 | } |
| 62 | |
| 63 | condition { |
| 64 | test = "Bool" |
| 65 | variable = "aws:SecureTransport" |
| 66 | values = ["false"] |
| 67 | } |
| 68 | } |
| 69 | } |
| 70 | |
| 71 | resource "aws_s3_bucket_policy" "fleet_backup" { |
| 72 | bucket = aws_s3_bucket.fleet_backup.id |
| 73 | policy = data.aws_iam_policy_document.fleet_backup_tls_only.json |
| 74 | } |
| 75 | |
| 76 | # The router box's credentials: object read/write/delete + list on the fleet |
| 77 | # bucket, nothing else in the account. Mint the access key by hand |
| 78 | # (aws iam create-access-key --user-name litestream-fleet) — keys never land |
| 79 | # in tofu state. |
| 80 | resource "aws_iam_user" "litestream_fleet" { |
| 81 | name = "litestream-fleet" |
| 82 | } |
| 83 | |
| 84 | data "aws_iam_policy_document" "litestream_fleet" { |
| 85 | statement { |
| 86 | sid = "ListFleetBucket" |
| 87 | actions = ["s3:ListBucket"] |
| 88 | resources = [aws_s3_bucket.fleet_backup.arn] |
| 89 | } |
| 90 | |
| 91 | statement { |
| 92 | sid = "ReadWriteFleetObjects" |
| 93 | actions = [ |
| 94 | "s3:GetObject", |
| 95 | "s3:PutObject", |
| 96 | "s3:DeleteObject", |
| 97 | ] |
| 98 | resources = ["${aws_s3_bucket.fleet_backup.arn}/*"] |
| 99 | } |
| 100 | } |
| 101 | |
| 102 | resource "aws_iam_user_policy" "litestream_fleet" { |
| 103 | name = "litestream-fleet-bucket" |
| 104 | user = aws_iam_user.litestream_fleet.name |
| 105 | policy = data.aws_iam_policy_document.litestream_fleet.json |
| 106 | } |
| 107 | |
amadan