| 1 | # 🤖 The server-release-feed mirror (issue #550 Part 12): a second, boring |
| 2 | # home for the signed update feed — manifest.json plus the per-version |
| 3 | # binaries. GitHub's asset CDN has served freshly-clobbered manifests stale |
| 4 | # (and brand-new binaries 404) for minutes after a publish — documented |
| 5 | # operator pain — and that feed is the entire fleet's update path. |
| 6 | # deploy/release-server.sh copies every publish/promote here |
| 7 | # (LCHAT_RELEASE_MIRROR_BUCKET); updaters fall back to it |
| 8 | # (LCHAT_RELEASE_MIRROR_URL). Versioning doubles as the rollback story for a |
| 9 | # clobbered manifest.json. |
| 10 | # |
| 11 | # NOT YET APPLIED — needs a deliberate, named |
| 12 | # `AWS_PROFILE=… tofu apply` in infra/prod; plan only until then. |
| 13 | |
| 14 | resource "aws_s3_bucket" "releases" { |
| 15 | bucket = "eleven-releases-${local.account_id}" |
| 16 | } |
| 17 | |
| 18 | resource "aws_s3_bucket_versioning" "releases" { |
| 19 | bucket = aws_s3_bucket.releases.id |
| 20 | |
| 21 | versioning_configuration { |
| 22 | status = "Enabled" |
| 23 | } |
| 24 | } |
| 25 | |
| 26 | # Manifest clobbers are tiny and binaries land under fresh server-<ver>/ keys, |
| 27 | # so noncurrent versions exist only as the manifest's rollback window — 90 |
| 28 | # days is generous without growing forever. |
| 29 | resource "aws_s3_bucket_lifecycle_configuration" "releases" { |
| 30 | bucket = aws_s3_bucket.releases.id |
| 31 | |
| 32 | rule { |
| 33 | id = "expire-noncurrent-90d" |
| 34 | status = "Enabled" |
| 35 | |
| 36 | filter {} |
| 37 | |
| 38 | noncurrent_version_expiration { |
| 39 | noncurrent_days = 90 |
| 40 | } |
| 41 | } |
| 42 | } |
| 43 | |
| 44 | # This bucket is deliberately PUBLIC-READ — the one bucket in the account |
| 45 | # where that is the point, against the everything-else-blocked posture |
| 46 | # (backup.tf, hibernate.tf). Instances and self-hosted boxes must fetch |
| 47 | # updates anonymously, and the content is public, non-secret, and |
| 48 | # trust-anchored elsewhere: the manifest is Ed25519-signed against a key baked |
| 49 | # into every binary, and binaries are sha256-pinned by that signed manifest, |
| 50 | # so the mirror provides availability only — a tampered object can only cause |
| 51 | # a refusal, never an install (docs/server-releases.md § Trust model). ACLs |
| 52 | # stay fully blocked; only the bucket *policy* door is opened, and the |
| 53 | # GET-only policy below is the entire public surface (no anonymous List). |
| 54 | # Writes stay IAM-only via the release-publisher user. |
| 55 | resource "aws_s3_bucket_public_access_block" "releases" { |
| 56 | bucket = aws_s3_bucket.releases.id |
| 57 | |
| 58 | block_public_acls = true |
| 59 | ignore_public_acls = true |
| 60 | block_public_policy = false |
| 61 | restrict_public_buckets = false |
| 62 | } |
| 63 | |
| 64 | data "aws_iam_policy_document" "releases_public_read" { |
| 65 | statement { |
| 66 | sid = "PublicReadReleaseObjects" |
| 67 | actions = ["s3:GetObject"] |
| 68 | resources = ["${aws_s3_bucket.releases.arn}/*"] |
| 69 | |
| 70 | principals { |
| 71 | type = "*" |
| 72 | identifiers = ["*"] |
| 73 | } |
| 74 | } |
| 75 | |
| 76 | # Public means anonymous, not unencrypted: deny any request over plain |
| 77 | # HTTP. Updaters fetch the mirror via its https URL already (the manifest |
| 78 | # is Ed25519-signed regardless — TLS here is defence in depth, not the |
| 79 | # trust anchor). |
| 80 | statement { |
| 81 | sid = "DenyInsecureTransport" |
| 82 | effect = "Deny" |
| 83 | actions = ["s3:*"] |
| 84 | resources = [ |
| 85 | aws_s3_bucket.releases.arn, |
| 86 | "${aws_s3_bucket.releases.arn}/*", |
| 87 | ] |
| 88 | |
| 89 | principals { |
| 90 | type = "*" |
| 91 | identifiers = ["*"] |
| 92 | } |
| 93 | |
| 94 | condition { |
| 95 | test = "Bool" |
| 96 | variable = "aws:SecureTransport" |
| 97 | values = ["false"] |
| 98 | } |
| 99 | } |
| 100 | } |
| 101 | |
| 102 | resource "aws_s3_bucket_policy" "releases" { |
| 103 | bucket = aws_s3_bucket.releases.id |
| 104 | policy = data.aws_iam_policy_document.releases_public_read.json |
| 105 | |
| 106 | # The policy grants public access, so the access block must relax |
| 107 | # block_public_policy before it can be attached. |
| 108 | depends_on = [aws_s3_bucket_public_access_block.releases] |
| 109 | } |
| 110 | |
| 111 | # The publisher's credentials: object put + list on this bucket, nothing else |
| 112 | # in the account — and no DeleteObject, so a leaked publisher key can |
| 113 | # overwrite the current manifest (noncurrent versions survive, versioning is |
| 114 | # the rollback) but never destroy history. Mint the access key by hand |
| 115 | # (aws iam create-access-key --user-name release-publisher) — keys never land |
| 116 | # in tofu state. |
| 117 | resource "aws_iam_user" "release_publisher" { |
| 118 | name = "release-publisher" |
| 119 | } |
| 120 | |
| 121 | data "aws_iam_policy_document" "release_publisher" { |
| 122 | statement { |
| 123 | sid = "ListReleasesBucket" |
| 124 | actions = ["s3:ListBucket"] |
| 125 | resources = [aws_s3_bucket.releases.arn] |
| 126 | } |
| 127 | |
| 128 | statement { |
| 129 | sid = "WriteReleaseObjects" |
| 130 | actions = [ |
| 131 | "s3:GetObject", |
| 132 | "s3:PutObject", |
| 133 | ] |
| 134 | resources = ["${aws_s3_bucket.releases.arn}/*"] |
| 135 | } |
| 136 | } |
| 137 | |
| 138 | resource "aws_iam_user_policy" "release_publisher" { |
| 139 | name = "release-publisher-bucket" |
| 140 | user = aws_iam_user.release_publisher.name |
| 141 | policy = data.aws_iam_policy_document.release_publisher.json |
| 142 | } |
| 143 | |
| 144 | output "releases_bucket" { |
| 145 | value = aws_s3_bucket.releases.bucket |
| 146 | } |
| 147 | |
| 148 | # What instances set as LCHAT_RELEASE_MIRROR_URL. |
| 149 | output "releases_mirror_url" { |
| 150 | value = "https://${aws_s3_bucket.releases.bucket_regional_domain_name}/releases" |
| 151 | } |
| 152 | |
amadan