Terraform generates the secrets that have no external meaning
(POSTGRES_PASSWORD, AUTH_SECRET, METRICS_TOKEN, INDEXNOW_KEY) via the random
provider instead of requiring the operator to hand-generate and paste each
into terraform.tfvars. Each is pinned with a static keepers value (secrets.tf)
so apply never regenerates a value already in use - the exact incident class
this guards against: every session invalidated, the app<->DB password
mismatched. Rotation is now a deliberate keepers edit, never a side effect.
postgres_password/auth_secret move from required inputs to optional (default
"") - explicit var wins when supplied (seeding an EXISTING live secret during
a migration onto Terraform, hop-1 cutover runbook Stage 0), else Terraform
generates and owns it. metrics_token/indexnow_key are new: neither existed in
Terraform before, both previously left for the app's own fallback generation.
VAPID deliberately stays a required, non-generated input - an EC keypair
where regeneration breaks every existing push subscription outright, unlike
an opaque token.
Sizing tiers: a locals.sizes t-shirt map (nano/small/medium/large ->
{workers, app_cpus, db_cpus, db_memory}), toward the target Proxmox
sizing-tier model (architecture doc SS6) ahead of actually provisioning VMs -
Proxmox itself stays deferred; today a tier just sizes container caps on the
existing SSH-managed hosts. A host can reference one by name (hosts.<name>.
size) or keep hand-picking the four fields, so existing tfvars are
unaffected; prod's example now uses size = "large" (identical numbers),
beta keeps explicit numbers, and a commented uat example demonstrates the
shortcut for a future ephemeral host.
Strengthened terraform/README.md's local-state caveat: more Terraform-
generated secrets landing in tfstate raises the stakes of the existing
never-commit-cleartext-state guidance, not just the sizing.
Verified: terraform validate + fmt clean. A real `terraform plan` against
fake hosts (prod/beta/uat, mixing size="large"/explicit-numbers/size="nano")
resolved every sizing correctly (prod 8/8/4/16g, beta 4/4/2/8g, uat
1/1/1/1g) and planned exactly one instance of each random_password/random_id
resource. Applied just those four resources (real generation, -target to
avoid touching the fake SSH-only host resources) and re-planned: "No
changes" - confirming the keepers pinning holds. Adding an explicit
postgres_password override afterward left the random_password resource
itself completely untouched (0 replace/destroy), confirming the override
path never disturbs the generated resource.
* Split web/worker duties with THERMOGRAPH_ROLE
Background work (the subscription notifier) is welded to the same process
that serves requests, so scaling the web tier to N replicas would also scale
notifier instances unless something restricts it further than leader
election alone.
Add THERMOGRAPH_ROLE (web|worker|all, default all - unchanged single-process
behavior). Every replica runs the same image; ROLE only gates whether a
process is allowed to own the notifier at all, layered on top of the
existing leader election: web replicas never start it even if they'd win
leader election, worker replicas start it if they win. The decision is
pulled into _should_run_notifier() so it's unit-testable without booting the
full app (DB init, places index, neighbor warmer).
Add a minimal /healthz liveness route (no DB/upstream I/O, not under BASE)
so a worker replica - which serves no real traffic - still has something
Swarm can health-check.
* Add the Swarm interim stack file, a pinnable TimescaleDB tag, and a Caddy health-gate
Three changes toward the hop-1 interim cutover, all inert until Track B
stands up the platform:
docker-stack.yml: the Swarm stack file for the interim cutover, distinct
from docker-compose.yml (today's plain-compose deploy, unaffected). Pulls a
pre-built image (IMAGE_TAG) instead of building in place; app/worker publish
no host port (127.0.0.1:8137:8137 has no Swarm equivalent - Swarm's routing
mesh publishes on 0.0.0.0, which would expose the plaintext app un-fronted),
reaching Caddy only over an MTU-lowered overlay network (VXLAN-over-WireGuard
needs a smaller MTU or large payloads silently stall); db is placement-
pinned to a labelled node; app/worker skip inline migrations
(RUN_MIGRATIONS=0) so the runbook's one-shot migrate task is the only thing
that ever runs Alembic; secrets are real Swarm secrets mounted at
/run/secrets, read by the entrypoint shim rather than plain env vars.
TIMESCALEDB_TAG: docker-compose.yml's db image now reads this (default
latest-pg18, today's behavior unchanged), wired through Terraform
(timescaledb_tag, default "latest-pg18") so it can actually be pinned to an
exact minor without hand-editing the host - required before any host of the
stack could replicate with another (a floating tag risks mismatched
extension minors, which blocks a physical replica and risks compressed-
chunk corruption on restore).
Caddy active health-gate: both the Terraform-rendered Caddyfile and the live
deploy/Caddyfile now health-check the app on the same cheap /healthz route
its own Docker HEALTHCHECK uses (now /healthz instead of the SSR homepage,
so it's cheap enough for a tight interval and works identically for a
worker replica, which serves no public traffic at all) - Caddy won't
forward into a container that's still booting or unhealthy.
Verified live: built and booted the real image via docker compose - both
containers report healthy via the new /healthz-based HEALTHCHECK, and GET /
still renders the full SSR homepage unchanged. Both Caddyfiles validated
with the real caddy binary. docker-stack.yml validated with docker compose
config (required-var guards fire with clear messages; secrets correctly
mount at /run/secrets/<name>, matching the entrypoint shim's mapping).
docker-compose.yml validated with and without TIMESCALEDB_TAG set, alongside
the existing openmeteo overlay. terraform validate + fmt clean.
Two prod-readiness hardening changes:
DB tuning scales with the container budget. Replace the fixed 8 GB
20-tuning.sql with 20-tuning.sh, which derives shared_buffers (25%),
effective_cache_size (75%), work_mem, maintenance_work_mem and
duckdb.max_memory (50%) from the DB_MEMORY the compose db service now passes in.
The ratios reproduce the historical 8 GB tuning exactly and scale linearly, so
the 48 GB prod box (db_memory 16g) gets shared_buffers 4 GB / duckdb 8 GB with
no separate edit. Beta/local (8g default) are unchanged. Docs that told
operators to raise the tuning by hand are updated.
Boot ordering for the self-hosted archive. On an openmeteo host, install a
docker.service drop-in (Wants/After rclone-om.service) so Docker starts after
the object-storage mount is ready on every boot — the restart-policy containers
never bind an empty mount point. rclone-om is Type=notify, so After waits for
the mount to actually be ready. Cleaned up when openmeteo is toggled off.
Get the 45-year historical record off the rate-limited public Open-Meteo
archive API by running a private Open-Meteo instance that serves the
era5_seamless blend (0.1° ERA5-Land + 0.25° ERA5 for gusts) from the
compressed .om archive in object storage, mounted on the host with rclone.
- climate.py: make ARCHIVE_URL env-driven (THERMOGRAPH_ARCHIVE_URL) and pin
models=era5_seamless on the archive fetches only, so a self-hosted instance
serves the same 0.1° resolution; forecast path unchanged. The public API's
default is already seamless, so dev/beta (URL unset) behave identically.
- docker-compose.openmeteo.yml: open-meteo-api + two rolling sync workers
(era5_land 0.1°, era5 0.25° for gusts), bind-mounting the object-storage
mount; the overlay points the app at the local instance.
- Makefile: om-up / om-down / om-backfill (one-time full-history backfill).
- Terraform: per-host openmeteo flag layers the overlay, renders OM_DATA_DIR,
and provisions the host rclone systemd mount from the bucket credentials.
- deploy/openmeteo: operator runbook + rclone mount unit template.
Terraform config under terraform/ manages the two existing VPS hosts and hands the
app to docker-compose, with local state:
- prod: the new 48GB/12-core VPS (release branch, thermograph.org), sized larger.
- beta: the old VPS 75.119.132.91 (main branch, testing tier), no public domain.
- The LAN dev box stays on deploy/deploy-dev.sh (dev branch) — out of Terraform.
A reusable module (modules/thermograph-host) SSHes each host to install docker/
compose/ufw (+ Caddy when a domain is set), sync the checkout to the host's branch,
render /etc/thermograph.env from Terraform variables (secrets pushed via provisioner
content, never on local disk), `docker compose up -d`, and health-check. Named
volumes are preserved on re-apply, so the Postgres data is never recreated.
Container resources are now env-driven in docker-compose.yml (APP_CPUS/DB_CPUS/
DB_MEMORY/WORKERS) with unchanged defaults, so Terraform can size each host.
