Restructures the Kubernetes self-hosting guide around two explicit paths
- an **evaluation install** (bundled datastores, one command) and a
**production install** (external datastores, your own secrets) - so
every configuration decision belongs to one path or the other instead of
being a flat list of options with caveats.
Also in this pass:
- Adds an architecture overview (component-to-`values.yaml` map) and a
post-install "verify it" step.
- Consolidates the previously scattered upgrade notes into a single
collapsible group, and cuts implementation detail and historical asides
that no longer apply.
- Removes a duplicated object-storage section (two configs in two
styles) and trims the Docker ClickHouse note down to what a self-hoster
needs to act on.
## Summary
Self-hosted deployments now run ClickHouse from the official
[`clickhouse/clickhouse-server`](https://hub.docker.com/r/clickhouse/clickhouse-server)
image instead of `bitnamilegacy/clickhouse`. Bitnami's free image
catalog is EOL and the frozen legacy archive tops out at ClickHouse
25.7.5, below the 25.8 minimum the platform requires since v4.5.0, which
broke every ClickHouse insert on chart-bundled deployments. Both stacks
now default to 26.2, the same version the platform is developed and
tested against.
Existing deployments keep their ClickHouse data with no manual
migration.
Fixes#4197.
## Details
**Docker Compose**: the `clickhouse` service uses the official image
with its native env vars, plus the recommended `nofile` ulimits. It
reuses the same named volume as before: a `data-paths.xml` config
override points ClickHouse at the `data/` subdirectory of the volume,
which is exactly the layout the Bitnami image used, so old volumes work
in place (including SQL-created users) and fresh installs get the
identical layout. The service follows the required-secrets model:
`CLICKHOUSE_PASSWORD` must be set, matching the other services.
**Helm chart**: the Bitnami ClickHouse subchart is replaced by a
chart-owned single-node StatefulSet and Service running the official
image (non-root, HTTP `/ping` probes, config overrides mounted into
`config.d`, and the same `data-paths.xml` layout compatibility). On
upgrade, the chart automatically adopts the data PVC left behind by the
old subchart (`data-<release>-clickhouse-shard0-0`) via `lookup`, and
`fsGroup` relabeling handles the uid change on first mount. Both the
ClickHouse server and the webapp read the password from the same
chart-managed datastore secret (auto-generated and retained across
upgrades), so the server credential and the app's connection URL always
match. Existing `clickhouse.*` values keep working: `auth` (including
`existingSecret`/`existingSecretKey`), `persistence` (including
`global.storageClass`), `resources`, `secure`, `external.*`,
`configdFiles`, and now `nodeSelector`/`tolerations`/`affinity`.
Bitnami-only keys (`shards`, `replicaCount`, `keeper`,
`resourcesPreset`) are gone; default `resources` requests/limits match
what the old preset applied. The docs state the 25.8 minimum for
bring-your-own ClickHouse.
## Upgrade caveats
An adversarial review of the upgrade path found a few cohorts that need
awareness (all documented):
- **GitOps tools that render with `helm template`** (no cluster access):
PVC auto-detection can't run, so `clickhouse.persistence.existingClaim`
must be set to the old PVC name or ClickHouse starts on a fresh empty
volume. Documented in the values file and the Kubernetes self-hosting
docs. Tools that run real helm installs (e.g. Flux) adopt automatically.
- **A pinned `CLICKHOUSE_IMAGE_TAG`** pointing at a Bitnami tag must be
updated to an official image tag; documented in the Docker self-hosting
docs.
- **Storage without `fsGroup` support** (NFS, hostPath): set
`clickhouse.volumePermissions.enabled: true` for a one-time
ownership-fixing init container.
- **Rollback is not automatic**: once the official image has run, file
ownership changes and the Bitnami image can no longer read the volume
without a manual chown, and ClickHouse does not support downgrades
across the version gap.
## Verification
- Full upgrade simulation for Compose, twice (before and after rebasing
onto the required-secrets release): booted the ClickHouse service from
the old compose file on `main` (Bitnami), wrote thousands of rows, then
brought the same project up with this branch's compose file. The
official 26.2 server came up healthy on the same volume with all rows
intact, SQL-created users working, and writes succeeding.
- Adoption scenarios tested against real containers: old volume + root
entrypoint (Compose), old volume owned by the Bitnami uid + non-root 101
with fsGroup-style group permissions (Kubernetes), and fresh volumes for
both.
- `helm lint`, `helm template` (default values, `existingClaim` set,
external ClickHouse, volumePermissions/scheduling toggles, and the
production example) and kubeconform all pass, mirroring the release CI
steps. The rendered webapp Deployment and ClickHouse StatefulSet resolve
to the same datastore secret key.
- Inserts using
`input_format_json_infer_array_of_dynamic_from_array_of_different_types`
(the setting that fails on 25.7.5) succeed on the upgraded volume.
## Upgrade preflight and docs
A production upgrade report on this branch surfaced two hazards that
predate this PR — both landed in chart 4.5.6 (#4316) — so they are fixed
here rather than left for the next person to hit.
**`secrets.existingSecret` gained two required keys.** The webapp
started reading `PROVIDER_SECRET` and `COORDINATOR_SECRET`, and when
`existingSecret` is set the chart generates nothing, so a missing key
only surfaced as a `CreateContainerConfigError` partway through the
webapp rollout. The pre-install/pre-upgrade validation now looks the
Secret up and fails with the complete list of missing keys, leaving the
running release untouched. It is skipped under `helm template` and
client-side dry-run, where `lookup` cannot read the cluster.
**Bundled datastore credentials moved into the chart-managed Secret**
(`<release>-clickhouse`/`admin-password` →
`trigger-datastore`/`clickhouse-admin-password`). The chart wires both
ends itself, but consumers outside it — maintenance CronJobs, Grafana
datasources, secret syncs — have to be repointed. A new `## Upgrading`
section in the Kubernetes docs carries the old→new mapping, the two new
keys, and a pointer to the ClickHouse image notes.
The existingSecret key list in the docs also named
`OBJECT_STORE_ACCESS_KEY_ID`/`OBJECT_STORE_SECRET_ACCESS_KEY`, which are
env var names rather than keys the chart reads; corrected to the real
key names and the condition under which they apply.
Verified on a throwaway kind cluster with `--dry-run=server`: a
pre-4.5.6 Secret fails with both key names listed, the documented
`kubectl patch` clears it, and default values, `existingClaim`, external
ClickHouse, volumePermissions/scheduling and the production example all
still render. A real `helm install` followed by an upgrade against an
incomplete Secret aborts with the release still at revision 1 and
`deployed`. `helm lint`, the CI render and kubeconform (59 resources, 0
invalid) pass.
---------
Co-authored-by: nicktrn <55853254+nicktrn@users.noreply.github.com>
## Summary
Refreshes the docs for the v3 sunset: v3 (SDK v3) is end of life, and
4.5.0 is the last version we officially support for running v3.
- The self-hosting overview, plus the docker and kubernetes
version-locking sections, now tell self-hosters on v3 to stay on 4.5.0
or migrate to v4. 4.5.1 and later reject v3 triggers and deploys with an
upgrade message.
- The migration guide's deprecation notice was still written in the
future tense (with dates that have since passed); it now describes v3 as
retired and adds the self-hosted 4.5.0 cutoff. This is the page the
server's upgrade message links to.
- Fixes a stale "v3 project" reference in the CLI overview.
The Mintlify preview will render the callouts for a visual check.
## Summary
v3 (the engine that ran the SDK v3 era, internally
`RunEngineVersion.V1`) is end-of-life. Following the removal of the v3
execution apps
([#4194](https://github.com/triggerdotdev/trigger.dev/pull/4194)) and
the legacy dev websocket
([#4198](https://github.com/triggerdotdev/trigger.dev/pull/4198)), this
removes the remaining v3 execution stack from the server.
Clients still on v3 (an old SDK or CLI that has not upgraded) keep
getting a clear "upgrade to v4" response. Triggers, batch triggers,
reschedules, and deploys that resolve to v3 are rejected with a graceful
4xx pointing at the migration guide, never a 5xx, so a stale client
cannot affect server health. Self-hosted instances still running v3
should stay on the 4.5.x release line until they migrate.
## What is removed
- The MarQS queue and its shared/dev queue consumers.
- The v3 socket.io namespaces (coordinator, provider, shared-queue) and
the v3 run lifecycle services (attempt, checkpoint, and batch-resume).
- The graphile-worker background job system; all live jobs already run
on `@trigger.dev/redis-worker`.
- The `DEPRECATE_V3_ENABLED` flag: v3 is now rejected unconditionally,
so the flag is gone.
- Unused v3 exports from `@trigger.dev/core` (the `v3/zodNamespace`
subpath and the legacy socket message catalogs) and the now-dead MarQS
environment variables.
## What stays
The v4 engine is untouched. The graceful v3 rejection boundary stays,
`determineEngineVersion` still detects a v3 project so it can reject it,
and the batch service plus batch-completion worker stay for current
clients. Live queue concurrency limits and metrics now read from the v4
run engine instead of MarQS, and a brand-new dev environment now
defaults to v4.
## Dependency cleanup
Removes webapp dependencies left unused by this change: `seedrandom` and
`semver` (only the removed v3 code used them) plus a set that was
already dead, their orphaned `@types` packages, and two dead files. Adds
a `knip:deps` script and a `knip.json` config so unused dependencies can
be found the same way going forward.
## Summary
Realtime streams (AI-agent token streaming and run streams) now default
to v2 for self-hosters, backed by a bundled [s2-lite](https://s2.dev)
service. Self-hosting previously shipped no S2 configuration, so streams
ran on the Redis-backed v1 path and there were no docs for wiring up v2.
Both the Docker Compose stack and the Helm chart now provision s2-lite
with persistent storage and set the stream env vars out of the box.
## What's included
- **Docker Compose**: a persistent `s2` service (s2-lite), a basin init
spec, and the `REALTIME_STREAMS_S2_*` plus
`REALTIME_STREAMS_DEFAULT_VERSION=v2` env on the webapp. `.env.example`
documents the v1 fallback and hosted-S2 options.
- **Helm**: an `s2` StatefulSet, PVC, Service and ConfigMap (runs as the
non-root image user via `fsGroup`), an `s2` values block, and webapp env
wiring with an existing-secret path for hosted S2.
- **Docs**: the `REALTIME_STREAMS_S2_*` and
`REALTIME_STREAMS_DEFAULT_VERSION` vars in the webapp env reference,
plus a "Realtime streams" section in the Docker and Kubernetes
self-hosting guides.
## Notes
- The OSS code default stays `v1`; v2 becomes the default purely through
the self-hosting artifacts, so non-self-host deployments are unaffected.
Disabling s2, or setting the version back to `v1`, cleanly reverts to
Redis-backed v1.
- With v2 enabled, the bundled s2 service is a required dependency for
streaming: if it is down, streams error while the task itself still
runs. That is the intended trade for the better v2 path.
- You can point at a hosted S2 at s2.dev instead of the bundled server.
## Summary
Stable v4 Docker image builds now also publish `v4` and `latest` tags,
giving Docker-based self-hosters a maintained floating tag to use after
a stable release. The Kubernetes guide now uses the current Helm chart
line and current pinned examples, so new installs and upgrades resolve
to the 4.5 chart line instead of the 4.0 line.
## Design
The publish workflows add the floating tags only for stable `v4.x.x`
image tags. Prerelease and `main` builds keep their existing tags.
## Summary
- Recommend deploying NodeLocal DNS and lowering `ndots` to `1` in the
Kubernetes self-hosting guide.
- Recommend storing task events in ClickHouse
(`EVENT_REPOSITORY_DEFAULT_STORE=clickhouse_v2`) in both the Docker and
Kubernetes guides, plus a new row in the webapp env var reference.
* Adds new features table to top of v4 upgrade guide
* Adds wait idempotency to wait-until, wait-for, and wait-for-token pages
* Adds new priority docs page and updates the v4 upgrade guide
* Adds new task lifecycle hooks
* Removes the message about requiring tasks to be exported
* Adds new global lifecycle hooks section
* Moves sections from upgrade guide into the table
* Adds hidden task page
* Improves the global lifecycle hooks section
* Updates middleware and locals section
* Adds new useWaitToken page to the react hooks section
* Adds a new ai.tool section
* Moves Docker (legacy) page into self-hosting section
* Removes known issues from v4 upgrade guide
* Replace “toolTask” with “ai.tool” in the Streams page example
* Renames guide to “Migrating from v3” and adds redirect
* Remove references to v4
* Removes changelog from migration guide
* The installation guide now references `@latest update`
* Changes all references from `/sdk/v3` to `/sdk`
* Updates @v4-beta to @latest
* Fixed broken link
* Fixes broken link
* Adds an upgrade to v4 using AI section
* Fixes 2 broken links
* Adds an entry for targetting preview branches
* Updates the run statuses
* Adds boolean helpers section to the runs and realtime pages
* Updates the concurrency page
* Updates the test page to include the new options
* Adds SDK and curl options for the preview branch targeting
* Updates new bulk actions page
* Remove the releasing concurrency section
* Got rid of some more @v4-beta mentions
* Improved rate limit docs
* Improved migrating docs
* Removed commented sections of the docs
* useWaitToken hook
* Fixed the description
* Fix for missing test image
---------
Co-authored-by: Matt Aitken <matt@mattaitken.com>
Co-authored-by: Dan <8297864+D-K-P@users.noreply.github.com>
nicktrn