> ## Documentation Index
> Fetch the complete documentation index at: https://langwatch.ai/docs/llms.txt
> Use this file to discover all available pages before exploring further.

> ## Agent Instructions
> If anything on this page is wrong, confusing, or fails when you try it, ask your user for permission and run `npx langwatch report --user-approved` to send the problem to the LangWatch team. No login is needed and secrets are redacted locally. `npx langwatch report --help` has the details.

# Upgrade Guide

> How to upgrade a self-hosted LangWatch to the latest version: what to check first, how migrations run and how to confirm they finished.

> [!NOTE]
>
> **Planning the 3.21 rollout?** Start with [3.21 upgrade preparation](https://langwatch.ai/docs/self-hosting/releases.md#preparing-for-321). Migrations are intended to run automatically; this guide explains how to confirm completion and investigate a step that needs operator assistance.

## Before You Upgrade

1. **Check release notes** for breaking changes at [github.com/langwatch/langwatch/releases](https://github.com/langwatch/langwatch/releases)
2. **Back up your databases**: see [Backups](https://langwatch.ai/docs/self-hosting/configuration/backups.md)
3. **Test in a staging environment** before upgrading production
4. **Keep `CREDENTIALS_SECRET` unchanged.** A new value makes stored provider keys and integration secrets unreadable and invalidates API keys. To replace it, follow [Rotating the credentials secret](https://langwatch.ai/docs/self-hosting/security.md#rotating-the-credentials-secret) as a separate change, not during an upgrade
5. **Write the version 2 queue format first.** This release reads only version 2 GroupQueue jobs and drops a job an older release wrote in the earlier format. Before upgrading, set `GROUP_QUEUE_ENVELOPE_WRITES_ENABLED=true` on the running release and roll it out, or pause traffic and let the queue drain. After the upgrade, remove that variable and `ES_FOLD_TRUST_ABSENT_MISS`: this release reads neither

### Database privileges

The upgrade keeps its ledger in its own Postgres schema, `<schema>_upgrade_ledger`, beside the installation's. The `DATABASE_URL` role needs `CREATE` on the database to create it, or you can create that schema beforehand, owned by the role. Without either, the api and the worker refuse to start and name the missing privilege.

## Automatic identity and access migration

Identity and access migrations run automatically after each upgrade,
organization by organization: the preparation step runs them right after
`pnpm task upgrade`, and the workers run them again every hour. A tenant whose
authorization, identifier, and existing SSO data migrate cleanly is switched
over. No preparatory release or manual migration pass is required.

A tenant whose historical data disagrees with the migrated result is **held**
on its existing legacy sign-in path: the migration leaves that tenant's data
untouched, and the app still starts and serves it as before. A tenant whose
migration throws is **parked** the same way, also without blocking startup.

Both are retried automatically. The next upgrade and the workers' hourly pass
re-drive them, and an operator can also trigger a pass, or target one
organization, without waiting. See
[Check the migration results](#check-the-migration-results) below.

The preparation step still fails in three cases: the migration runner itself
fails outright, the queue behind it fails to drain, or the fleet makes no
progress for 25 passes (about two minutes: for example because Redis is
unreachable, or another process holds every claim).

In any of them it exits non-zero, which fails the upgrade (the Helm
pre-upgrade Job where one renders, otherwise the workers), and the new api is
not ready until the installation is current, so the previous version keeps
serving; the next run retries from scratch.

Keep the current identity-provider configuration, callback URLs, and
`CREDENTIALS_SECRET` during the upgrade. The migration preserves the existing
SSO route; switching providers remains a separate operation.

Take a fresh database backup and deploy normally. The diagnostics below help
resolve held or parked tenants; they are not a routine preflight.

## Check the migration results

Sign in with an operator account from `ADMIN_EMAILS` and open **Ops >
Upgrades > Tenant migrations** (`/ops/upgrades?tab=tenants`). It lists every
registered tenant migration with its Finalized, Held and Parked counts, and
lets you search for an organization to inspect its status, target a migration
run for it, or start a fresh pass immediately rather than waiting for the next
restart.

The live connection indexes deliberately refuse duplicate slots rather than
silently choosing a connection. `REJECTED`, `DRAFT`, and `CLAIMED` still occupy
slots; only `DISCARDED` and `TORN_DOWN` release them.

```sql theme={null}
SELECT "organizationId",
       CASE WHEN "source" = 'legacy-grandfathered' THEN 'legacy' ELSE 'direct' END AS slot,
       count(*) AS connections
FROM "SsoConnection"
WHERE "state" NOT IN ('DISCARDED', 'TORN_DOWN')
GROUP BY "organizationId", slot
HAVING count(*) > 1;

SELECT domains.domain, count(DISTINCT connection."organizationId") AS organizations
FROM "SsoConnection" AS connection
CROSS JOIN LATERAL unnest(connection."verifiedDomains") AS domains(domain)
WHERE connection."state" NOT IN ('DISCARDED', 'TORN_DOWN')
GROUP BY domains.domain
HAVING count(DISTINCT connection."organizationId") > 1;
```

Resolve reported duplicates through the existing connection lifecycle before
upgrading, or contact support. Do not delete the active connection or discard
domain ownership to force the migration through.

When upgrading an installation that already has connection-scoped SCIM data,
also check for directory identities whose connection is missing:

```sql theme={null}
SELECT DISTINCT identity."connectionId"
FROM "ScimExternalId" AS identity
LEFT JOIN "SsoConnection" AS connection ON connection."id" = identity."connectionId"
WHERE connection."id" IS NULL;
```

If `ScimDirectoryUser` already exists, run the same query with that table as
well. The ownership migration derives `organizationId` from the connection
and refuses missing connections rather than guessing a tenant. It also
backfills verified-domain routing for existing live connections of every source.

SCIM now keeps each organization's directory profile and active state separately
from the shared login account. A directory rename does not change the primary
sign-in email, and deactivation removes access only to that organization.
Inactive directory users remain available through SCIM reads. Group external
identifiers are unique within each directory; legacy groups retain their
organization-wide namespace.

Directory usernames remain unique within each organization, ignoring case and
surrounding whitespace. Deleted resources release their usernames. The migration
refuses conflicting existing usernames rather than merging accounts. If both
directory identity tables already exist, this query must also return no rows:

```sql theme={null}
WITH claims AS (
  SELECT "connectionId", "userId" FROM "ScimDirectoryUser"
  UNION
  SELECT "connectionId", "userId" FROM "ScimExternalId"
)
SELECT connection."organizationId", lower(btrim(account."email")) AS username,
       count(DISTINCT account."id") AS users
FROM claims
JOIN "SsoConnection" AS connection ON connection."id" = claims."connectionId"
JOIN "User" AS account ON account."id" = claims."userId"
WHERE btrim(account."email") <> ''
GROUP BY connection."organizationId", lower(btrim(account."email"))
HAVING count(DISTINCT account."id") > 1;
```

For an earlier schema containing only `ScimExternalId`, use only that table's
`SELECT` in the `claims` expression. Resolve any conflicts before upgrading.

The migration preserves existing global account disables. It cannot distinguish
an earlier SCIM disable from an administrator's security action, so it does not
automatically reactivate those accounts. Review any historical disable through
the administrator account controls when restoring access.

## Docker Compose

```bash theme={null}
# Pull latest images
docker compose pull

# Restart with new images
docker compose up -d
```

The workers run the upgrade when they start, and the app does not report ready until it has completed (see [Run the upgrade](#run-the-upgrade)). Compose has no separate `migrate` service; if your compose file predates this, copy the current one from [`infra/compose.yml`](https://github.com/langwatch/langwatch/blob/main/infra/compose.yml). The workers must be enabled.

## Helm Chart

```bash theme={null}
# Update the Helm repository
helm repo update

# Upgrade the release
helm upgrade langwatch langwatch/langwatch \
  --namespace langwatch \
  -f values-production.yaml \
  --wait --timeout 45m
```

The upgrade can run for up to 35 minutes on a large installation, in the pre-upgrade Job where one renders (see [Run the upgrade](#run-the-upgrade)) and otherwise in the new worker pods. Helm's default hook timeout is 5 minutes, and a shorter `--timeout` fails the release part-way through a migration.

### Pin a Specific Version

```bash theme={null}
# List available versions
helm search repo langwatch/langwatch --versions

# Install a specific chart version
# x-release-please-start-version
helm upgrade langwatch langwatch/langwatch \
  --namespace langwatch \
  --version 3.23.0 \
  -f values-production.yaml
# x-release-please-end
```

## Run the upgrade

> [!WARNING]
>
> The **api never migrates the database itself**. The workers run the upgrade when they start; until the installation is current the api reports **not ready**, and a process started on an installation that has not been upgraded to its release **refuses to serve** and logs which steps are outstanding:
>
> ```text theme={null}
> langwatch-api (api) refuses to serve: the installation is behind this image: blocking steps not done: prisma:20261006180000_..., clickhouse:00042. Run `pnpm task upgrade` from this image, then start it again.
> ```
>
> Starting the workers on the **new** image runs the upgrade for you. To run it yourself, use the **new** image, then start the app again.

Each way of running LangWatch runs the upgrade for you:

| How you run LangWatch | Who runs the upgrade |
| - | - |
| Helm, `helm upgrade` with upgrades serialised (`serializeUpgrades` on and no `app.dataplane`) | the pre-upgrade Job, on the new image, before any pod rolls |
| Helm, `helm upgrade` otherwise | the new worker pods, on start; the new api pods are not ready until it is done |
| Helm, first install | the worker's first boot, once, on the empty database |
| Helm with serialised upgrades and `app.migrations.preRoll: false` | **you**, before `helm upgrade` (below) |
| Docker Compose | the workers, on every `docker compose up`; the app is not ready until it is done |
| `npx @langwatch/server` | the workers the CLI starts; the CLI has no migration phase of its own |

To run it yourself, from the new image with the app's environment (`DATABASE_URL`, `CLICKHOUSE_URL`, `REDIS_URL`):

```bash theme={null}
cd /app/apps/api && pnpm --silent run start:prepare:db
```

That runs `pnpm task upgrade` (Postgres, ClickHouse and LangWatchQL, under one lease, so a second run waits for the first). It is safe to run again: on a current installation it applies no step and leaves the schema as it is. To see what it would do first, run `cd /app/apps/tasks && pnpm task upgrade plan`; `pnpm task upgrade status` shows the ledger. Both take `--json`.

### Exit codes and what to do

`pnpm task upgrade` exits `0` when it is done and otherwise one of two non-zero codes, and its last two log lines name the cause and the next action. A refused or failed run is recorded, so **Ops > Upgrades** and `upgrade status` show it.

| Exit | Outcome code | Meaning | What to do |
| - | - | - | - |
| `0` | `done` | Every step the image needs is applied | Start or restart the app and the workers |
| `1` | `failed_prisma_migration` | A PostgreSQL migration failed and cannot be retried by the upgrade (written before re-runnable migrations became the rule, or not shipped in this image) | Run the `prisma migrate resolve` command the message names, then run the upgrade again |
| `1` | `rerunnable_migration_failed` | A re-runnable migration still failed on its last attempt | Fix what its error names (often a lock another session holds), then run the upgrade again. No resolve command is needed |
| `1` | `prebuilt_index_differs` | A pending migration creates an index if it does not exist, and an index of that name already exists with another definition or invalid | Drop or rename the index the message names (the upgrade does not drop it for you), then run the upgrade again. A waiting worker retries by itself |
| `1` | `schema_failed` | A PostgreSQL or ClickHouse target could not be applied, or the ledger schema could not be created | Check the named target is reachable (`DATABASE_URL`, `CLICKHOUSE_URL`) and that the `DATABASE_URL` user has `CREATE` on the database, then run the upgrade again |
| `1` | `step_failed` | A blocking data step failed | Read its error with `pnpm task upgrade status`, fix the cause, then run the upgrade again. The step resumes from its checkpoint |
| `1` | `reconciler_failed` | The ClickHouse TTL or LangWatchQL reconciler failed | Fix the store it names (`CLICKHOUSE_URL`), then run the upgrade again |
| `1` | `lease_lost` | This run lost the upgrade lease part-way (it stopped renewing it) | Run the upgrade again. It resumes from the ledger |
| `1` | `failed` | Any other failure | Read the error and `upgrade status`, fix the cause, then run it again |
| `3` | `lease_not_acquired` | Another upgrade holds the lease and did not finish within 10 minutes | Wait for it (`upgrade status` shows its run), then run the upgrade again. A dead holder's lease expires by itself after 60 seconds |

Every `1` is safe to retry: the ledger remembers what is done.

### When a PostgreSQL migration fails

PostgreSQL applies a migration one statement at a time, so a statement cancelled by the 2 second `lock_timeout` leaves its earlier statements applied and a failed row in `_prisma_migrations`. Every migration written after `20261006180001_gateway_realtime_session_metering` is written to survive a second run. For those, `upgrade` marks the failed row rolled back itself (`prisma migrate resolve --rolled-back <migration>`), waits and applies it again, up to 3 attempts with a 2 second then 4 second wait.

A failed row an earlier run left is cleared the same way before the schema is applied.

An older migration, or a failed one this image does not ship, stops the run with `failed_prisma_migration`. Check what it left behind, run `prisma migrate resolve --rolled-back <migration>` if none of it remains (or `--applied <migration>` if you finished it by hand) with the app's `DATABASE_URL`, then run the upgrade again. No migration has rolled forward, so the previous version keeps serving.

### Large tables: build indexes ahead of the upgrade

Two schema changes touch a whole large table while the upgrade runs.

* **`AuditLog` unique index** (`170500_audit_log_idempotency_key`): PostgreSQL builds it in place and holds a lock that blocks audit writes for the build. On a large table the build can outlast the 2 second `lock_timeout` and fail. Build the index yourself first, during a quiet period, with `CREATE UNIQUE INDEX CONCURRENTLY IF NOT EXISTS` using the index name the migration declares. The migration then finds it and moves on.
* **ClickHouse `trace_summaries` index** (`00103_trace_summaries_updated_at_index`): the index is added and then materialised over every existing row. The mutation runs in the background and competes with merges for IO, and later `ALTER` statements on that table queue behind it. Watch `system.mutations` and run the upgrade at a quiet time on a large table.

### What the upgrade does

* **In release order.** From the release the ledger records to the release of the image, the upgrade plans each release's PostgreSQL migrations, then its ClickHouse migrations on every ClickHouse target (the shared one and each private dataplane), then its blocking data steps. An upgrade by one release applies its schema in one pass, then its blocking steps, as before.

  An upgrade across several releases steps through them: it says so, then for each release it names the release, applies the PostgreSQL migrations up to and including it, says how many it applied, and runs that release's blocking steps before it moves on, so a blocking step sees the PostgreSQL schema of its own release.

  While stepping, Prisma's own output is shown only when a migration fails. ClickHouse migrations step the same way: each release applies them on every ClickHouse target up to its own last one.

  Migrations the image ships that no release lists yet are applied in one pass at the end. A ClickHouse target that fails is reported after the others have run, and fails the upgrade.
* **Its own record first.** The upgrade keeps its ledger, its lease and the list of running processes in their own PostgreSQL schema, `<your schema>_upgrade_ledger` (`public_upgrade_ledger` by default), which it creates before anything else. The database user in `DATABASE_URL` needs `CREATE` on the database for that; if it has none, create the schema beforehand with that user as its owner.
* **From any version.** Upgrade to the latest release from any version; the worker rolls through every step. There is no release to stop at first. [Releases and support](https://langwatch.ai/docs/self-hosting/releases.md) explains which releases get fixes.
* **Short locks and retries.** PostgreSQL statements run with a 2 second `lock_timeout`. A statement that waits longer fails instead of blocking your traffic. The upgrade makes up to 3 attempts at a failed schema apply (waiting 2 seconds, then 4), then exits; the previous version keeps serving, and running it again resumes where it stopped.
* **One run at a time.** The upgrade holds a lease in its ledger, renews it every 15 seconds and loses it after 60 seconds without a renewal. A second run waits up to 10 minutes for a live holder, saying so every 30 seconds, then exits `3`.
* **Background steps.** Data copies that do not block the release run on the workers after the upgrade. A step that must not run while an older version still writes waits until every running app and worker is on a version that knows it.

### ClickHouse is required

The app and the workers refuse to start without ClickHouse. An installation with no `CLICKHOUSE_URL`, or one where the upgrade never applied the ClickHouse migrations, stays refused by name until `pnpm task upgrade` has run against a reachable ClickHouse.

### While it runs, and after

Every running app and worker records itself in the upgrade ledger's serving roster as it starts, refreshes that record every 15 seconds, and removes it on a graceful stop. A record not refreshed for 60 seconds counts as gone. The upgrade uses these records to tell when every older version has stopped. A process that cannot refresh its own record for 60 seconds stops serving until a refresh succeeds again, so it never keeps writing unseen.

To follow an upgrade:

| Where | What it shows |
| - | - |
| **Ops > Upgrades** (`/ops/upgrades`) | The installation's state, each release's steps with their status and a one-line description, every run with its phases and error. It refreshes while a run is in progress. Platform operators only (`ADMIN_EMAILS`). |
| `pnpm task upgrade status` | The same state and steps, in the terminal, from the app image (`--json` for scripts) |
| **Settings, Checkup**, `langwatch doctor` | The **Postgres migrations** and **ClickHouse migrations** rows: Fail for a pending or failed migration, with the fix; Not checked when no upgrade is recorded yet or the ledger cannot be read |
| `npx @langwatch/server doctor` | The same output as `upgrade status`, for a local install |

The installation is in one of seven states: **Up to date**, **Finishing in background** (blocking steps done, background steps still running), **Behind** (this image declares steps the ledger has not run), **Never upgraded** (an empty ledger), **Upgrading**, **Rolled back** (an older version is running beside newer steps) and **Needs attention** (a step or run failed).

### Reading the console

The upgrade logs as `langwatch:tasks:upgrade`. Every progress line carries four fields next to its message: `phase`, `waitingOn` (what it is blocked on, with a placeholder word when the run is not waiting), `elapsedMs` since the run began, and `next` (what you can do). A password, token or connection-string credential is masked in every line. These are the line families, in the order a run writes them:

| Line starts with | When | What it tells you |
| - | - | - |
| `first run: this database holds no LangWatch schema` | The database is empty | The upgrade creates its ledger, applies every migration, then exits so the app can serve |
| `no ClickHouse target is configured` (warning) | `CLICKHOUSE_URL` and every private route are unset | The upgrade applies PostgreSQL only; the app and workers refuse to serve until you set it |
| `upgrade ledger ready in Postgres schema <schema> after N ms` | Start of every run | Where the ledger lives. `the upgrade ledger could not be created` (warning) ends the run with `schema_failed` |
| `waiting for the upgrade lease held by <owner> on <host> (<image>)` | Another run holds the lease | Who holds it and how long you have waited, every 30 seconds |
| `upgrade planned from <release>: N schema migrations (a Postgres, b ClickHouse) and N blocking steps across <releases>` | After the plan | What this run will do. A line that says the ledger is current means it will do none |
| `phase <name> started: waiting on ...`, then `succeeded in N ms` or `failed after N ms` (warning) | Each phase | The phases are `preflight`, `postgres-schema`, `clickhouse-schema` (per release) and `reconcile` |
| `blocking step <id> started (from the start \| resuming from its checkpoint): <description>`, then `done in N ms` or `failed after N ms: <error>` | Each blocking data step | The step's id and its one-line description |
| `Prisma migration <name> failed ... and is re-runnable: marked it rolled back` (warning), then `applied on attempt N` | A migration cancelled by a lock | Which migration, which attempt of 3, and the wait before the next. `schema apply failed without a failed migration; retrying in N ms` is the same retry for a transient failure |
| `upgrade finished in N ms` or `first run finished in N ms`; or `upgrade stopped after N ms (<outcome code>)` (warning) | End of the run | The outcome code from the table above |
| `upgrade complete; the UI is at <BASE_HOST> ...` or `upgrade exited <code>; ...` | Last line | Where the UI is, and that `pnpm task upgrade status` shows every step and run. With `BASE_HOST` unset it says so |

A serving app or worker writes its own lines before it serves:

| Line | Meaning |
| - | - |
| `<app> (<role>) refuses to serve: the installation is behind this image: blocking steps not done: <ids>. Run `pnpm task upgrade` ...` | The upgrade has not run for this image |
| `... refuses to serve: ClickHouse is required and no ClickHouse target is configured` | Set `CLICKHOUSE_URL`, run the upgrade, start again |
| `first install: the ledger and the schema are empty, so this api runs `pnpm task upgrade` once before it serves` | The Helm first-install path; the upgrade's lines follow |
| `roster entry lapsed past 60000 ms: <process> stops serving; readiness answers 503 until a roster write succeeds` | The process cannot write to PostgreSQL. Check `DATABASE_URL`. `roster entry written again: <process> serves again` reports the recovery |

A serving process that cannot read the ledger names `DATABASE_URL` in its refusal.

### Upgrade settings

| Variable or value | Effect |
| - | - |
| `app.migrations.preRoll` (Helm, default `true`) | Renders the pre-upgrade Job, only when upgrades are serialised (`serializeUpgrades` on and no `app.dataplane`); otherwise the new worker pods run the upgrade. `false` with serialised upgrades leaves it to you; until you run it, the new api is not ready. |
| `app.migrations.preRollTimeoutSeconds` (Helm, default `2100`) | How long that Job may run. |
| `CLICKHOUSE_MIGRATE_WAIT_SECONDS` (default `180`) | How long the upgrade waits for ClickHouse to accept connections. `0` fails on the first refused connection. A value that is not a number of seconds, 0 or more, is refused with `Invalid CLICKHOUSE_MIGRATE_WAIT_SECONDS`. |
| `SKIP_LWQL_PROVISION` (`1` or `true`) | The upgrade skips LangWatchQL provisioning. |
| `CLICKHOUSE_CLUSTER` | Names the ClickHouse cluster. When set, the upgrade creates Replicated engines and replicates DDL across nodes. |
| `CLICKHOUSE_COLD_STORAGE_ENABLED` (`true`) | The reconcile phase writes table TTLs that move aged data to the cold volume. Hot days come from `CLICKHOUSE_COLD_STORAGE_<TABLE>_TTL_DAYS`, else `CLICKHOUSE_COLD_STORAGE_DEFAULT_TTL_DAYS`, else the table's built-in default. |
| `BASE_HOST` | Only the upgrade's last log line reads it, to say where the UI is. |
| `BUILD_TIME` | Set while building an image: the upgrade finds no ClickHouse target and applies no migration there. Leave it unset at runtime. |

For the split into api, worker and tasks applications, see [the chart's upgrade notes](https://github.com/langwatch/langwatch/tree/main/charts/langwatch#upgrading-to-the-split-api-worker-and-tasks-applications). `app.features.skipEnvValidation` is inert: no process reads `SKIP_ENV_VALIDATION` any more.

## Rollback

A rollback never runs migrations and never needs a down migration. Every migration in the supported window only adds, so the previous version runs on the upgraded schema as it is. The pre-upgrade Job, where one renders, runs on `helm upgrade` only, never on `helm rollback`.

* The previous version starts on the newer schema.
* The Upgrades page shows **Rolled back** while the older version runs. Background steps that an older version can undo are reopened, and run again after you upgrade again.
* Data the newer version wrote stays. Features the older version does not know about are unavailable until you upgrade again.

### Helm

```bash theme={null}
# List release history
helm history langwatch --namespace langwatch

# Rollback to a previous revision
helm rollback langwatch <revision> --namespace langwatch
```

### Docker Compose

Pin image tags to a specific version instead of `latest`:

```yaml theme={null}
services:
  app:
    image: langwatch/langwatch:<previous-version> # the release you are rolling back to
```

Then restart:

```bash theme={null}
docker compose up -d
```

## Breaking Changes

### Internal authentication for the NLP service

The app can now authenticate itself to the NLP service with a shared credential, `LANGWATCH_NLP_INTERNAL_SECRET`. The app sends it on every NLP request, and the NLP service refuses requests that do not carry it. With the variable unset on the NLP service, it accepts unauthenticated requests as before.

An upgrade requires no change, and an install that never sets the variable keeps working. Setting it is recommended, and the value has to be the same on both sides:

* **Docker Compose**: the app, the workers and `langwatch_nlp` all read `.env`, so add one `LANGWATCH_NLP_INTERNAL_SECRET` line there (`openssl rand -hex 32`) and restart the stack.
* **Helm chart**: with `autogen.enabled=true` the chart generates the value into the app Secret and points the app, the workers and the NLP Deployment at the same key, so a default install needs no change. A value already in that Secret is kept, so an upgrade does not rotate it.

  If you supply the app Secret yourself, add a `LANGWATCH_NLP_INTERNAL_SECRET` key to it and roll the three Deployments. Until you do, the key is absent, the variable stays unset on all three, and the install carries on.

Docker Compose also no longer publishes the NLP service on host port 5561. The app and the workers reach it over the compose network at `langwatch_nlp:5561`, which is what `LANGWATCH_NLP_SERVICE` already points at. If you were calling port 5561 from the host, add a `ports` entry for `langwatch_nlp` in your own compose override.

### LangWatch AI Gateway Ingress moved to the app Ingress (Helm)

The gateway sub-chart used to create its own Ingress on every install, with class `nginx`, host `gateway.langwatch.ai`, TLS secret `gateway-tls`, a `letsencrypt-prod` cert-manager issuer and ingress-nginx streaming annotations. It now renders no Ingress. The `gateway.ingress.*` values are gone.

To keep publishing the gateway through an Ingress, set its host on the app Ingress. The chart renders a second Ingress, `<release>-gateway-ingress`, with the app Ingress `className`, `labels` and `annotations`:

```yaml theme={null}
ingress:
  enabled: true
  className: nginx
  # ...your existing app hosts, tls and annotations
  gateway:
    host: gateway.acme.com
    tls:
      secretName: gateway-tls
```

With `className: nginx` the chart still adds the streaming and timeout annotations to the gateway Ingress, and now sets a 32 MB body limit. The paths are fixed at `/v1` (Prefix) and `/health` (Exact). For other paths, such as `/v1beta`, write your own route. If you relied on a cert-manager issuer only on the gateway Ingress, add it to `ingress.annotations` or `ingress.gateway.annotations`.

A values file that still sets `gateway.ingress.*` fails to render with a message naming `ingress.gateway.host`, so the Ingress cannot disappear on upgrade without an error. `gateway.ingress.enabled: false` on its own is accepted. If you route to the gateway another way, remove the block and set `gateway.publicUrl`. See [Routing and ingress controllers](https://langwatch.ai/docs/self-hosting/deployment/routing.md).

The gateway PodDisruptionBudget now uses `maxUnavailable: 1` and renders only when the gateway runs more than one pod. The app, workers, NLP and LangEvals budgets also render only above one replica. The chart refuses a budget that leaves no pod evictable, such as `minAvailable` equal to `replicaCount` or `maxUnavailable: 0`.

### Helm installs with autogen off and Argo CD

With `autogen.enabled=false`, chart-managed Redis and PostgreSQL now need `redis.auth.existingSecret` and `postgresql.auth.existingSecret` (or a password value). The chart used to generate these passwords, and under Argo CD a generated password changed on every sync. A plain `helm upgrade` of a release that already has the chart's own `<release>-redis` and `<release>-postgresql` Secrets keeps them.

Under Argo CD, first copy the password PostgreSQL currently accepts into a Secret of your own with another name: Argo CD prunes the chart's Secret once `existingSecret` is set.

The LangWatchQL render Job is now named `<release>-lwql-access-render-<hash>` from its spec, and the install Job no longer expires. Argo CD no longer recreates it every few minutes or fails the sync on an immutable Job. Missing LangWatchQL passwords no longer block ClickHouse: the Job logs the missing keys and LangWatchQL stays off.

Keep Argo CD pruning on, so a new spec replaces the old Job; without it, delete old render Jobs before a rollback, or the rollback finds its Job already complete and does not render again.

The app now reads the gateway keys named by `gateway.secrets.internalSecretKey` and `gateway.secrets.jwtSecretKey`, the same keys the gateway pod reads.

### 3.16 or 3.17 to 3.18: Sign-in and SSO

The upgrade keeps existing accounts working with no manual step, apart from the cases below. A Helm upgrade from 3.16.0 with email and password users, an Okta-configured deployment and domain SSO was tested end to end; the Azure AD account move is covered by tests only:

* Password users sign in with their existing password on the new email-first sign-in page.
* SSO users land on their existing user and organization. The callback URL stays `/api/auth/callback/<provider>`, so the identity provider registration does not change.
* Azure AD accounts move to the key the new sign-in looks them up by on each user's first sign-in after the upgrade. There is no SQL to run.
* Browser sessions and API keys keep working.
* The identity migrations run on first start. Check **Ops > Upgrades > Tenant migrations** afterwards; see [Check the migration results](#check-the-migration-results).

The first start runs a migration preflight before the app reports ready. `--timeout 45m` on `helm upgrade` gives it room to start. A migration that cannot finish during the preflight stays gated and does not block startup, so check **Ops > Upgrades > Tenant migrations** once the rollout completes. The app can restart once or twice while the bundled ClickHouse restarts on its new image; that is expected.

**Provider setting.** The chart now passes `app.nextAuth.provider` to the app as `AUTH_PROVIDER`. `NEXTAUTH_PROVIDER` is still read and logs a deprecation warning. If you select the provider with `NEXTAUTH_PROVIDER` in `app.extraEnvs`, the chart leaves the setting to you, as before. Outside the chart, set `AUTH_PROVIDER`; when both are set it wins.

**Moving password users to SSO.** An SSO sign-in joins an existing password account only once its address is confirmed. See [Existing email and password accounts](https://langwatch.ai/docs/self-hosting/configuration/sso.md#existing-email-and-password-accounts) for how linking works in the current release.

**Okta and Auth0.** The id token is now verified: its `iss` must equal the `issuer` in the provider's discovery document. A provider behind a proxy that rewrites one but not the other stops signing people in until the two agree.

### Dataset Object Storage (Helm)

Datasets moved from PostgreSQL to object storage, with a one-time automatic migration on upgrade. Helm deployments running more than one worker replica with the default local storage must either scale workers to 1 or configure S3-compatible storage before upgrading.

See the **[dataset storage migration guide](https://langwatch.ai/docs/self-hosting/upgrade-dataset-storage.md)** for the upgrade checklist, storage options, and rollback notes.

### v1.x, v2.x to v3: ClickHouse Migration

LangWatch v3 replaces Elasticsearch/OpenSearch with ClickHouse as the primary data store. This is a zero-downtime migration, Elasticsearch and ClickHouse run side-by-side while you migrate historical data.

See the **[full migration guide](https://langwatch.ai/docs/self-hosting/upgrade-v3.md)** for step-by-step instructions covering infrastructure setup, data migration, and cleanup.

### Helm Chart Pre-1.0.0 to 1.0.0+

If upgrading from a Helm chart version before 1.0.0, the PostgreSQL PVC naming changed. To preserve your data:

```yaml theme={null}
postgresql:
  primary:
    persistence:
      existingClaim: "data-langwatch-postgresql-0" # Your existing PVC name
```

Check your existing PVC name:

```bash theme={null}
kubectl -n langwatch get pvc
```

## Known Issues

### 3.20.1 drops OTLP/JSON spans with no attributes

LangWatch 3.20.1 drops an OTLP/JSON span that has no `attributes` array, but still answers `2xx`, so the SDK reports success. The api logs `Error parsing OTLP span, dropping` once per lost span. OTLP allows a span with no attributes, and later releases accept it. Spans sent to 3.20.1 this way are not recovered by upgrading; upgrade to stop the loss.

## Version Compatibility

| Chart Version | App Version | Kubernetes | Helm | Data Store |
| - | - | - | - | - |
| 3.x | 3.x | 1.28+ | 3.12+ | ClickHouse |
| 2.x | 2.x | 1.25+ | 3.10+ | Elasticsearch, OpenSearch |
| 1.x | 1.x | 1.25+ | 3.10+ | Elasticsearch, OpenSearch |

## Getting Help

If you encounter issues during an upgrade:

* Check pod logs: `kubectl -n langwatch logs deploy/langwatch-app --tail=100`
* Check the [Troubleshooting guide](https://langwatch.ai/docs/self-hosting/troubleshooting.md)
* Open an issue at [github.com/langwatch/langwatch/issues](https://github.com/langwatch/langwatch/issues)
* Contact [support](https://langwatch.ai/support)


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