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bootstrap.sh could not run to completion on OpenBao 2.6.1: - Release asset names were wrong. `bao_<ver>_linux_amd64.tar.gz` and `bao_<ver>_SHA256SUMS` both 404; the assets are `openbao_<ver>_...` and `checksums.txt`. The tarball is now saved under its real name and the checksum grep anchored to end-of-line, because checksums.txt also lists a .sbom.json and `sha256sum -c` resolves each line by the filename inside it. - `openssl rand -base64 32` appends a newline and the static seal reads the key file raw, so the service failed with `Error configuring seal "static": unknown encoding for AES-256 key`. - The audit stanza relied on the block label being the device type. 2.6.1 requires explicit `type` and `path` with device settings under `options`. Worth noting the intermediate state: with type and path but a bare `file_path`, the server starts and silently ignores the log location, which is the worse failure given a wedged audit device stops OpenBao answering at all. - `disable_mlock` is unsupported in 2.6.1 and warned on every start. - Nothing opened port 8200 and ufw defaults to deny(incoming), so vps1 could not reach the vault. dev renders on vps1, so this would have surfaced as a timeout during cutover rather than here. bootstrap-policies.sh installed beta's credentials as `deploy:deploy`, but vps2 has no `deploy` user and both environments deploy as `agent` (env-topology.sh sets TG_SSH_TARGET=agent@ for both; deploy.yml uses one VPS2_SSH_USER). install_creds also printed a success line after a failed chown: the call site wrapped it in `|| echo`, which suppresses `set -e` for everything inside the function, so it fell through to chmod and reported an ownership it never applied. It now removes the half-written file and returns non-zero. Corrects the isolation rationale accordingly — separate credentials buy audit attribution and a policy boundary against mistakes, not deploy-user isolation. Documents the 2.6.0 root-token change (HCSEC-2026-08): `generate-root` now targets an authenticated endpoint, so recovery keys cannot mint a replacement token and revoking the last root token before a second admin identity exists is a one-way door. Also corrects the runbook's `verify-parity.sh --all`, which cannot work from a single host given the AppRole CIDR bindings.
134 lines
6.8 KiB
HCL
134 lines
6.8 KiB
HCL
// OpenBao server config for the Thermograph estate. Lives at /etc/openbao/config.hcl
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// on vps2. Verified against OpenBao v2.6.1 (2026-07-22).
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//
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// ============================================================================
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// WHY THIS RUNS AS A NATIVE SYSTEMD SERVICE AND NOT A CONTAINER
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// ============================================================================
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// The estate is Docker-native and this is the one thing that must not be. The rule
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// is that OpenBao must not depend on anything it secures.
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//
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// * A Swarm service is fatal: deploy-stack.sh renders secrets in order to deploy
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// the stack, so the stack cannot contain the thing that holds them.
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// * A standalone `docker run --restart=always` is merely bad: it makes the vault's
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// availability a function of the same Docker daemon that deploys restart, and
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// leaves it one careless `docker system prune -a` from gone. The root CLAUDE.md
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// already lists `prune -a` as a thing that eats the rollback image; it would
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// eat this too.
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//
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// A native binary with Restart=always has exactly one dependency: the local disk.
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// See infra/openbao/openbao.service.
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//
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// Corollary that is easy to get wrong: the listener cert must NOT come from the
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// Caddy/ACME path. That would put DNS and the public internet in the boot chain of
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// the estate's secret store. It is self-signed, long-lived, and on disk.
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// ============================================================================
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ui = false
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cluster_name = "thermograph"
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log_level = "info"
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// `disable_mlock` is deliberately absent: OpenBao 2.6.1 does not recognise it and
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// logs `unknown or unsupported field disable_mlock` on every start. Carrying a
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// setting the server ignores only trains the operator to skim startup warnings,
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// which is where a real one will eventually hide. The corresponding note about
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// AmbientCapabilities=CAP_IPC_LOCK in openbao.service is moot for the same reason.
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// STORAGE: raft, and this is now forced rather than chosen. OpenBao 2.6.0
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// DEPRECATED the `file` backend for removal in v2.7.0, so picking `file` today buys
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// a migration within a release. Raft also has the only first-class backup primitive
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// (`bao operator raft snapshot save`), which is the disaster-recovery story.
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//
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// A single-node raft is the honest shape for a one-operator estate. Note that a
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// TWO-node raft would be strictly worse than one: quorum of two means losing either
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// node loses write availability. Three voters would be needed, and the desktop
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// (10.10.0.3) is intermittent, so it cannot be a reliable third.
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storage "raft" {
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path = "/var/lib/openbao"
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node_id = "vps2"
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}
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// Mesh-only. 10.10.0.1 is vps2's WireGuard address. There is deliberately no
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// 0.0.0.0 listener and no public DNS record — vps2 is a public VPS, and reaching
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// OpenBao should require being on the mesh, exactly like the Swarm control ports
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// and the Loki endpoint.
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listener "tcp" {
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address = "10.10.0.1:8200"
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tls_cert_file = "/etc/openbao/tls/bao.crt"
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tls_key_file = "/etc/openbao/tls/bao.key"
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}
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// Loopback, so a by-hand `bao` on the box works without the mesh address.
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listener "tcp" {
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address = "127.0.0.1:8200"
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tls_cert_file = "/etc/openbao/tls/bao.crt"
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tls_key_file = "/etc/openbao/tls/bao.key"
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}
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api_addr = "https://10.10.0.1:8200"
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cluster_addr = "https://10.10.0.1:8201"
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// ============================================================================
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// SEAL: static auto-unseal. This is the crux of the whole design.
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// ============================================================================
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// The `static` seal (OpenBao v2.4.0+) auto-unseals from a local key with no cloud
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// KMS and no HSM. OpenBao's own docs hedge it — "carefully evaluate use of Static
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// Key Auto Unseal" — but that caveat is written for multi-tenant enterprises.
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//
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// The decisive argument here is that static seal is NOT A DOWNGRADE FROM THE STATUS
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// QUO. Today /etc/thermograph/age.key is one file, 0400, root-owned, on each
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// rendering host, which decrypts every secret in the estate forever with no audit
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// trail. A static seal key at 0400 on vps2 is the IDENTICAL trust model: one file on
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// one box whose compromise is total compromise. What changes is everything layered
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// above it — per-consumer ACLs, an audit log, five-minute tokens, versioned rollback.
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//
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// WHY NOT SHAMIR: `bao operator init -key-shares=5 -key-threshold=3` means the vault
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// is sealed after every process restart — reboot, package upgrade, OOM kill — and a
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// human must type three shares. render-secrets.sh is on the deploy path for all three
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// environments, so a sealed vault blocks every deploy and every hotfix. With one
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// operator the N-of-M threshold is theatre: one person holds all the shares, so it
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// buys nothing against the real threat while costing an availability property the
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// estate currently has for free. Today a Contabo reboot needs no human at all.
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// Introducing a human-in-the-loop requirement that does not exist today is a
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// regression this estate cannot absorb.
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//
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// THE ONE NEW SINGLE POINT OF FAILURE this migration introduces: lose this key and
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// the raft snapshots become unrestorable. It MUST exist in at least two places, one
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// of them not on vps2. That is a hard operator obligation, not a suggestion.
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//
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// Rotation is supported n-1 via previous_key / previous_key_id.
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seal "static" {
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current_key_id = "20260801-1"
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current_key = "file:///etc/openbao/unseal.key"
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}
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// ============================================================================
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// AUDIT: two devices, deliberately.
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// ============================================================================
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// ⚠️ OpenBao STOPS ANSWERING REQUESTS ENTIRELY when no enabled audit device can
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// record them. That is correct behaviour for an audit log and a catastrophic way to
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// discover a full disk: a full /var on vps2 would block every deploy on the estate.
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// Two independent devices mean one wedging is survivable.
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//
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// Values are HMAC-SHA256'd in the log, so it is safe to ship to Loki through the
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// existing Alloy pipeline — which finally makes "who read which secret, when" a
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// queryable question. Today reading age.key leaves no trace whatsoever.
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//
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// logrotate on this path MUST signal with SIGHUP, or bao keeps writing to an
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// unlinked inode and the log silently stops growing.
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// OpenBao 2.6.1 requires `type` and `path` explicitly — the block label is the
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// device NAME, not its type — and device settings go in `options`. Written as
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// `audit "file" { file_path = ... }` the server refuses to start ("audit type must
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// be specified"); with type+path but a bare file_path it starts but silently
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// IGNORES the path and mode, which is the worse failure of the two.
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audit "file" {
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type = "file"
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path = "file/"
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options = {
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file_path = "/var/log/openbao/audit.log"
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mode = "0600"
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}
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}
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audit "syslog" {
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type = "syslog"
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path = "syslog/"
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}
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