---
title: "Webapp"
description: "Environment variables for the webapp container."
sidebarTitle: "Webapp"
mode: "wide"
---

| Name                                             | Required | Default               | Description                                                                                                        |
| :----------------------------------------------- | :------- | :-------------------- | :----------------------------------------------------------------------------------------------------------------- |
| **Secrets**                                      |          |                       |                                                                                                                    |
| `SESSION_SECRET`                                 | Yes      | —                     | Session encryption secret. Run: `openssl rand -hex 16`                                                             |
| `MAGIC_LINK_SECRET`                              | Yes      | —                     | Magic link encryption secret. Run: `openssl rand -hex 16`                                                          |
| `ENCRYPTION_KEY`                                 | Yes      | —                     | Secret store encryption key. Run: `openssl rand -hex 16`                                                           |
| `MANAGED_WORKER_SECRET`                          | Yes      | —                     | Managed worker secret. Must be set and match supervisor. Run: `openssl rand -hex 32`                               |
| `ALLOW_INSECURE_DEFAULT_SECRETS`                 | No       | false                 | Boot even if a secret is still a known-insecure published default. Temporary escape hatch for values you can't safely rotate yet (see [Secret generation and rotation](/self-hosting/kubernetes#secret-generation-and-rotation)). |
| **Domains & ports**                              |          |                       |                                                                                                                    |
| `REMIX_APP_PORT`                                 | No       | 3030                  | Remix app port.                                                                                                    |
| `APP_ORIGIN`                                     | Yes      | http://localhost:3030 | App origin URL.                                                                                                    |
| `LOGIN_ORIGIN`                                   | Yes      | http://localhost:3030 | Login origin URL. Most likely the same as `APP_ORIGIN`.                                                            |
| `API_ORIGIN`                                     | No       | `APP_ORIGIN`          | API origin URL.                                                                                                    |
| `STREAM_ORIGIN`                                  | No       | `APP_ORIGIN`          | Realtime stream origin URL.                                                                                        |
| `ELECTRIC_ORIGIN`                                | No       | http://localhost:3060 | Electric origin URL.                                                                                               |
| **Postgres**                                     |          |                       |                                                                                                                    |
| `DATABASE_URL`                                   | Yes      | —                     | PostgreSQL connection string.                                                                                      |
| `DIRECT_URL`                                     | Yes      | —                     | Direct DB connection string used for migrations etc.                                                               |
| `DATABASE_CONNECTION_LIMIT`                      | No       | 10                    | Max DB connections.                                                                                                |
| `DATABASE_POOL_TIMEOUT`                          | No       | 60                    | DB pool timeout (s).                                                                                               |
| `DATABASE_CONNECTION_TIMEOUT`                    | No       | 20                    | DB connect timeout (s).                                                                                            |
| `DATABASE_READ_REPLICA_URL`                      | No       | `DATABASE_URL`        | Read-replica DB string.                                                                                            |
| **Redis**                                        |          |                       |                                                                                                                    |
| `REDIS_HOST`                                     | Yes      | —                     | Redis host.                                                                                                        |
| `REDIS_PORT`                                     | Yes      | —                     | Redis port.                                                                                                        |
| `REDIS_READER_HOST`                              | No       | `REDIS_HOST`          | Redis reader host.                                                                                                 |
| `REDIS_READER_PORT`                              | No       | `REDIS_PORT`          | Redis reader port.                                                                                                 |
| `REDIS_USERNAME`                                 | No       | —                     | Redis username.                                                                                                    |
| `REDIS_PASSWORD`                                 | No       | —                     | Redis password.                                                                                                    |
| `REDIS_TLS_DISABLED`                             | No       | —                     | Disable Redis TLS.                                                                                                 |
| **Auth**                                         |          |                       |                                                                                                                    |
| `WHITELISTED_EMAILS`                             | No       | —                     | Whitelisted emails regex.                                                                                          |
| `LOGIN_RATE_LIMITS_ENABLED`                      | No       | true                  | Enable rate limiting on magic-link login.                                                                          |
| `AUTH_GITHUB_CLIENT_ID`                          | No       | —                     | GitHub client ID.                                                                                                  |
| `AUTH_GITHUB_CLIENT_SECRET`                      | No       | —                     | GitHub client secret.                                                                                              |
| **Email**                                        |          |                       |                                                                                                                    |
| `EMAIL_TRANSPORT`                                | No       | —                     | Email transport type. One of `resend`, `smtp`, `aws-ses`.                                                          |
| `FROM_EMAIL`                                     | No       | —                     | From email address.                                                                                                |
| `REPLY_TO_EMAIL`                                 | No       | —                     | Reply-to email address.                                                                                            |
| `RESEND_API_KEY`                                 | No       | —                     | Resend API key.                                                                                                    |
| `SMTP_HOST`                                      | No       | —                     | SMTP host.                                                                                                         |
| `SMTP_PORT`                                      | No       | —                     | SMTP port.                                                                                                         |
| `SMTP_SECURE`                                    | No       | —                     | SMTP secure flag.                                                                                                  |
| `SMTP_USER`                                      | No       | —                     | SMTP user.                                                                                                         |
| `SMTP_PASSWORD`                                  | No       | —                     | SMTP password.                                                                                                     |
| `AWS_REGION`                                     | No       | —                     | AWS region for SES.                                                                                                |
| `AWS_ACCESS_KEY_ID`                              | No       | —                     | AWS access key ID for SES.                                                                                         |
| `AWS_SECRET_ACCESS_KEY`                          | No       | —                     | AWS secret access key for SES.                                                                                     |
| **Worker**                                       |          |                       |                                                                                                                    |
| `GRACEFUL_SHUTDOWN_TIMEOUT`                      | No       | 60000 (1m)            | Graceful shutdown timeout (ms). Affects shutdown time.                                                             |
| **Concurrency limits**                           |          |                       |                                                                                                                    |
| `DEFAULT_ENV_EXECUTION_CONCURRENCY_LIMIT`        | No       | 100                   | Default env execution concurrency.                                                                                 |
| `DEFAULT_ORG_EXECUTION_CONCURRENCY_LIMIT`        | No       | 300                   | Default org execution concurrency, needs to be 3x env concurrency.                                                 |
| `DEFAULT_ENV_EXECUTION_CONCURRENCY_BURST_FACTOR` | No       | 1.0                   | Burst factor for env concurrency.                                                                                  |
| `DEFAULT_DEV_ENV_EXECUTION_ATTEMPTS`             | No       | 1                     | Default max attempts for dev environment runs.                                                                     |
| **Dev**                                          |          |                       |                                                                                                                    |
| `DEV_MAX_CONCURRENT_RUNS`                        | No       | 25                    | Sets the max concurrency for dev runs via the CLI.                                                                 |
| `DEV_OTEL_EXPORTER_OTLP_ENDPOINT`                | No       | `APP_ORIGIN/otel`     | OTel endpoint for dev runs.                                                                                        |
| **Rate limiting**                                |          |                       |                                                                                                                    |
| `API_RATE_LIMIT_REFILL_INTERVAL`                 | No       | 10s                   | API rate limit refill interval.                                                                                    |
| `API_RATE_LIMIT_MAX`                             | No       | 750                   | API rate limit max.                                                                                                |
| `API_RATE_LIMIT_REFILL_RATE`                     | No       | 250                   | API rate limit refill rate.                                                                                        |
| `API_RATE_LIMIT_REQUEST_LOGS_ENABLED`            | No       | 0                     | API rate limit request logs.                                                                                       |
| `API_RATE_LIMIT_REJECTION_LOGS_ENABLED`          | No       | 1                     | API rate limit rejection logs.                                                                                     |
| `API_RATE_LIMIT_LIMITER_LOGS_ENABLED`            | No       | 0                     | API rate limit limiter logs.                                                                                       |
| `API_RATE_LIMIT_JWT_WINDOW`                      | No       | 1m                    | API rate limit JWT window.                                                                                         |
| `API_RATE_LIMIT_JWT_TOKENS`                      | No       | 60                    | API rate limit JWT tokens.                                                                                         |
| **Deploy & Registry**                            |          |                       |                                                                                                                    |
| `DEPLOY_REGISTRY_HOST`                           | Yes      | —                     | Deploy registry host.                                                                                              |
| `DEPLOY_REGISTRY_USERNAME`                       | No       | —                     | Deploy registry username.                                                                                          |
| `DEPLOY_REGISTRY_PASSWORD`                       | No       | —                     | Deploy registry password.                                                                                          |
| `DEPLOY_REGISTRY_NAMESPACE`                      | No       | trigger               | Deploy registry namespace.                                                                                         |
| `DEPLOY_REGISTRY_ECR_DEFAULT_REPOSITORY_POLICY`  | No       | —                     | Raw IAM policy JSON applied via SetRepositoryPolicy to every ECR repo created by the webapp. Use to grant cross-account pull access to EKS workers when the ECR account is separate from the cluster account. |
| `DEPLOY_IMAGE_PLATFORM`                          | No       | linux/amd64           | Deploy image platform, same values as docker `--platform` flag.                                                    |
| `DEPLOY_TIMEOUT_MS`                              | No       | 480000 (8m)           | Deploy timeout (ms).                                                                                               |
| `DEPLOY_QUEUE_TIMEOUT_MS`                        | No       | 900000 (15m)          | Deploy queue timeout (ms).                                                                                         |
| **Object store (S3)**                            |          |                       |                                                                                                                    |
| `OBJECT_STORE_BASE_URL`                          | No       | —                     | Object store base URL (default provider).                                                                          |
| `OBJECT_STORE_BUCKET`                            | No       | —                     | Object store bucket name (default provider).                                                                       |
| `OBJECT_STORE_ACCESS_KEY_ID`                     | No       | —                     | Object store access key (default provider).                                                                        |
| `OBJECT_STORE_SECRET_ACCESS_KEY`                 | No       | —                     | Object store secret key (default provider).                                                                        |
| `OBJECT_STORE_REGION`                            | No       | —                     | Object store region (default provider).                                                                            |
| `OBJECT_STORE_SERVICE`                           | No       | s3                    | Object store service (default provider).                                                                           |
| `OBJECT_STORE_DEFAULT_PROTOCOL`                  | No       | —                     | Protocol for new uploads (e.g. `s3`, `r2`). Enables protocol-prefixed storage. See migration guide below.          |
| `OBJECT_STORE_{PROTOCOL}_BASE_URL`               | No       | —                     | Named provider base URL (replace `{PROTOCOL}`, e.g. `OBJECT_STORE_S3_BASE_URL`).                                   |
| `OBJECT_STORE_{PROTOCOL}_ACCESS_KEY_ID`          | No       | —                     | Named provider access key.                                                                                         |
| `OBJECT_STORE_{PROTOCOL}_SECRET_ACCESS_KEY`      | No       | —                     | Named provider secret key.                                                                                         |
| `OBJECT_STORE_{PROTOCOL}_REGION`                 | No       | —                     | Named provider region.                                                                                             |
| `OBJECT_STORE_{PROTOCOL}_SERVICE`                | No       | —                     | Named provider service.                                                                                            |
| `ARTIFACTS_OBJECT_STORE_BUCKET`                  | No       | —                     | Optional separate bucket for artifacts. If not set, uses main object store.                                        |
| `ARTIFACTS_OBJECT_STORE_BASE_URL`                | No       | —                     | Optional artifacts store base URL.                                                                                 |
| `ARTIFACTS_OBJECT_STORE_ACCESS_KEY_ID`           | No       | —                     | Optional artifacts store access key.                                                                               |
| `ARTIFACTS_OBJECT_STORE_SECRET_ACCESS_KEY`       | No       | —                     | Optional artifacts store secret key.                                                                               |
| `ARTIFACTS_OBJECT_STORE_REGION`                  | No       | —                     | Optional artifacts store region.                                                                                   |
| **Alerts**                                       |          |                       |                                                                                                                    |
| `ORG_SLACK_INTEGRATION_CLIENT_ID`                | No       | —                     | Slack client ID. Required for Slack alerts.                                                                        |
| `ORG_SLACK_INTEGRATION_CLIENT_SECRET`            | No       | —                     | Slack client secret. Required for Slack alerts.                                                                    |
| `ALERT_EMAIL_TRANSPORT`                          | No       | —                     | Alert email transport.                                                                                             |
| `ALERT_FROM_EMAIL`                               | No       | —                     | Alert from email.                                                                                                  |
| `ALERT_REPLY_TO_EMAIL`                           | No       | —                     | Alert reply-to email.                                                                                              |
| `ALERT_RESEND_API_KEY`                           | No       | —                     | Alert Resend API key.                                                                                              |
| `ALERT_SMTP_HOST`                                | No       | —                     | Alert SMTP host.                                                                                                   |
| `ALERT_SMTP_PORT`                                | No       | —                     | Alert SMTP port.                                                                                                   |
| `ALERT_SMTP_SECURE`                              | No       | —                     | Alert SMTP secure.                                                                                                 |
| `ALERT_SMTP_USER`                                | No       | —                     | Alert SMTP user.                                                                                                   |
| `ALERT_SMTP_PASSWORD`                            | No       | —                     | Alert SMTP password.                                                                                               |
| **Limits**                                       |          |                       |                                                                                                                    |
| `TASK_PAYLOAD_OFFLOAD_THRESHOLD`                 | No       | 524288 (512KB)        | Max task payload size before offloading to S3.                                                                     |
| `TASK_PAYLOAD_MAXIMUM_SIZE`                      | No       | 3145728 (3MB)         | Max task payload size.                                                                                             |
| `BATCH_TASK_PAYLOAD_MAXIMUM_SIZE`                | No       | 1000000 (1MB)         | Max batch payload size.                                                                                            |
| `BATCH_CONCURRENCY_LIMIT_DEFAULT`                | No       | 5                     | Default concurrency for batch processing.                                                                          |
| `BATCH_RATE_LIMIT_REFILL_RATE`                   | No       | 100                   | Batch rate limit refill rate.                                                                                      |
| `BATCH_RATE_LIMIT_MAX`                           | No       | 1200                  | Batch rate limit max.                                                                                              |
| `BATCH_RATE_LIMIT_REFILL_INTERVAL`               | No       | 10s                   | Batch rate limit refill interval.                                                                                  |
| `TASK_RUN_METADATA_MAXIMUM_SIZE`                 | No       | 262144 (256KB)        | Max metadata size.                                                                                                 |
| `MAX_BATCH_V2_TRIGGER_ITEMS`                     | No       | 500                   | Max batch size (legacy v2 API).                                                                                    |
| `STREAMING_BATCH_MAX_ITEMS`                      | No       | 1000                  | Max items in streaming batch (v3 API, requires SDK 4.3.1+).                                                        |
| `STREAMING_BATCH_ITEM_MAXIMUM_SIZE`              | No       | 3145728 (3MB)         | Max size per item in streaming batch.                                                                              |
| `STREAMING_BATCH_INGEST_CONCURRENCY`             | No       | 10                    | Items ingested concurrently per streaming batch request. Peak memory ≈ this × item size. Set to 1 for sequential. |
| **OTel limits**                                  |          |                       |                                                                                                                    |
| `TRIGGER_OTEL_SPAN_ATTRIBUTE_COUNT_LIMIT`        | No       | 1024                  | OTel span attribute count limit.                                                                                   |
| `TRIGGER_OTEL_LOG_ATTRIBUTE_COUNT_LIMIT`         | No       | 1024                  | OTel log attribute count limit.                                                                                    |
| `TRIGGER_OTEL_SPAN_ATTRIBUTE_VALUE_LENGTH_LIMIT` | No       | 131072                | OTel span attribute value length limit.                                                                            |
| `TRIGGER_OTEL_LOG_ATTRIBUTE_VALUE_LENGTH_LIMIT`  | No       | 131072                | OTel log attribute value length limit.                                                                             |
| `TRIGGER_OTEL_SPAN_EVENT_COUNT_LIMIT`            | No       | 10                    | OTel span event count limit.                                                                                       |
| `TRIGGER_OTEL_LINK_COUNT_LIMIT`                  | No       | 2                     | OTel link count limit.                                                                                             |
| `TRIGGER_OTEL_ATTRIBUTE_PER_LINK_COUNT_LIMIT`    | No       | 10                    | OTel attribute per link count limit.                                                                               |
| `TRIGGER_OTEL_ATTRIBUTE_PER_EVENT_COUNT_LIMIT`   | No       | 10                    | OTel attribute per event count limit.                                                                              |
| `SERVER_OTEL_SPAN_ATTRIBUTE_VALUE_LENGTH_LIMIT`  | No       | 8192                  | OTel span attribute value length limit.                                                                            |
| **Task events**                                  |          |                       |                                                                                                                    |
| `EVENT_REPOSITORY_DEFAULT_STORE`                 | No       | postgres              | Where to store task events. Set to `clickhouse_v2` to store in ClickHouse (recommended for production).            |
| `EVENT_REPOSITORY_POSTGRES_WRITES_DISABLED`      | No       | 0                     | Skip all PostgreSQL task-event writes (set to `1`). Only enable when `EVENT_REPOSITORY_DEFAULT_STORE` is `clickhouse_v2`, otherwise task events are lost. |
| **Realtime**                                     |          |                       |                                                                                                                    |
| `REALTIME_STREAM_VERSION`                        | No       | v1                    | Stream version exposed to tasks via the `TRIGGER_REALTIME_STREAM_VERSION` variable. Distinct from `REALTIME_STREAMS_DEFAULT_VERSION`. One of `v1`, `v2`. |
| `REALTIME_STREAM_MAX_LENGTH`                     | No       | 1000                  | Realtime stream max length.                                                                                        |
| `REALTIME_STREAM_TTL`                            | No       | 86400 (1d)            | Realtime stream TTL (s).                                                                                           |
| `REALTIME_STREAMS_DEFAULT_VERSION`               | No       | v1                    | Server-side default the webapp uses when a stream request doesn't pin a version (modern SDKs request `v2`). The Docker and Helm self-hosting defaults set this to `v2`. One of `v1`, `v2`. |
| `REALTIME_STREAMS_S2_BASIN`                       | No       | —                     | S2 basin that holds v2 realtime streams. Required for `v2`. Must be at least 8 characters.                          |
| `REALTIME_STREAMS_S2_ENDPOINT`                    | No       | —                     | Custom S2 API endpoint, including the `/v1` suffix (e.g. `http://s2/v1` for the bundled s2-lite). Omit to use hosted S2 at s2.dev. |
| `REALTIME_STREAMS_S2_SKIP_ACCESS_TOKENS`         | No       | false                 | Skip minting per-stream access tokens. Set to `true` for s2-lite, which needs no authentication.                    |
| `REALTIME_STREAMS_S2_ACCESS_TOKEN`               | No       | —                     | S2 access token. Required for hosted S2 unless `REALTIME_STREAMS_S2_SKIP_ACCESS_TOKENS` is `true`.                  |
| **Bootstrap**                                    |          |                       |                                                                                                                    |
| `TRIGGER_BOOTSTRAP_ENABLED`                      | No       | 0                     | Trigger bootstrap enabled.                                                                                         |
| `TRIGGER_BOOTSTRAP_WORKER_GROUP_NAME`            | No       | —                     | Trigger bootstrap worker group name.                                                                               |
| `TRIGGER_BOOTSTRAP_WORKER_TOKEN_PATH`            | No       | —                     | Trigger bootstrap worker token path.                                                                               |
| **Run engine**                                   |          |                       |                                                                                                                    |
| `RUN_ENGINE_WORKER_COUNT`                        | No       | 4                     | Run engine worker count.                                                                                           |
| `RUN_ENGINE_TASKS_PER_WORKER`                    | No       | 10                    | Run engine tasks per worker.                                                                                       |
| `RUN_ENGINE_WORKER_CONCURRENCY_LIMIT`            | No       | 10                    | Run engine worker concurrency limit.                                                                               |
| `RUN_ENGINE_WORKER_POLL_INTERVAL`                | No       | 100                   | Run engine worker poll interval (ms).                                                                              |
| `RUN_ENGINE_WORKER_IMMEDIATE_POLL_INTERVAL`      | No       | 100                   | Run engine worker immediate poll interval (ms).                                                                    |
| `RUN_ENGINE_WORKER_SHUTDOWN_TIMEOUT_MS`          | No       | 60000 (1m)            | Run engine worker shutdown timeout (ms).                                                                           |
| `RUN_ENGINE_RATE_LIMIT_REFILL_INTERVAL`          | No       | 10s                   | Run engine rate limit refill interval.                                                                             |
| `RUN_ENGINE_RATE_LIMIT_MAX`                      | No       | 1200                  | Run engine rate limit max.                                                                                         |
| `RUN_ENGINE_RATE_LIMIT_REFILL_RATE`              | No       | 400                   | Run engine rate limit refill rate.                                                                                 |
| `RUN_ENGINE_RATE_LIMIT_REQUEST_LOGS_ENABLED`     | No       | 0                     | Run engine rate limit request logs.                                                                                |
| `RUN_ENGINE_RATE_LIMIT_REJECTION_LOGS_ENABLED`   | No       | 1                     | Run engine rate limit rejection logs.                                                                              |
| `RUN_ENGINE_RATE_LIMIT_LIMITER_LOGS_ENABLED`     | No       | 0                     | Run engine rate limit limiter logs.                                                                                |
| `RUN_ENGINE_DEFAULT_MAX_TTL`                     | No       | —                     | Maximum TTL for all runs (e.g. "14d"). Runs without a TTL use this as default; runs with a larger TTL are clamped. |
| `MAXIMUM_DEV_QUEUE_SIZE`                         | No       | —                     | Maximum queued runs per queue in development environments.                                                         |
| `MAXIMUM_DEPLOYED_QUEUE_SIZE`                    | No       | —                     | Maximum queued runs per queue in deployed (staging/prod) environments.                                             |
| **Misc**                                         |          |                       |                                                                                                                    |
| `TRIGGER_TELEMETRY_DISABLED`                     | No       | —                     | Disable telemetry.                                                                                                 |
| `NODE_MAX_OLD_SPACE_SIZE`                        | No       | 8192                  | Maximum memory allocation for Node.js heap in MiB (e.g. "4096" for 4GB).                                           |
| `OPENAI_API_KEY`                                 | No       | —                     | OpenAI API key.                                                                                                    |
| `MACHINE_PRESETS_OVERRIDE_PATH`                  | No       | —                     | Path to machine presets override file. See [machine overrides](/self-hosting/overview#machine-overrides).          |
| `APP_ENV`                                        | No       | `NODE_ENV`            | App environment. Used for things like the title tag.                                                               |
| `ADMIN_EMAILS`                                   | No       | —                     | Regex of user emails to automatically promote to admin on signup. Does not apply to existing users.                |
| `EVENT_LOOP_MONITOR_ENABLED`                     | No       | 1                     | Node.js event loop lag monitor.                                                                                    |

## Multi-Provider Object Storage

The object storage system supports multiple S3-compatible providers (R2, S3, GCS, MinIO, etc.) using protocol prefixes. This enables migrating between providers without breaking existing runs.

### How It Works

When data exceeds the configured threshold (`TASK_PAYLOAD_OFFLOAD_THRESHOLD`), it's uploaded to object storage. The storage location is saved in the database with an optional protocol prefix:

- **With protocol**: `s3://run_abc/payload.json` or `r2://batch_123/item_0/payload.json`
- **Without protocol** (legacy): `batch_123/item_0/payload.json` (uses default provider)

### Configuration

#### Default Provider (Backward Compatible)

The default provider is used for data without a protocol prefix:

```bash
# Default provider (backward compatible - no protocol prefix)
OBJECT_STORE_BASE_URL=https://r2.example.com
OBJECT_STORE_ACCESS_KEY_ID=...
OBJECT_STORE_SECRET_ACCESS_KEY=...
OBJECT_STORE_REGION=auto
OBJECT_STORE_SERVICE=s3
```

#### Named Providers

Named providers are accessed via protocol-prefixed URIs. Configure them using `OBJECT_STORE_{PROTOCOL}_*` variables:

```bash
# S3 provider (accessed via s3:// prefix)
OBJECT_STORE_S3_BASE_URL=https://s3.amazonaws.com
OBJECT_STORE_S3_ACCESS_KEY_ID=...
OBJECT_STORE_S3_SECRET_ACCESS_KEY=...
OBJECT_STORE_S3_REGION=us-east-1
OBJECT_STORE_S3_SERVICE=s3

# R2 provider (accessed via r2:// prefix)
OBJECT_STORE_R2_BASE_URL=https://...r2.cloudflarestorage.com
OBJECT_STORE_R2_ACCESS_KEY_ID=...
OBJECT_STORE_R2_SECRET_ACCESS_KEY=...
OBJECT_STORE_R2_REGION=auto
OBJECT_STORE_R2_SERVICE=s3
```

#### Default Protocol for New Uploads

Set `OBJECT_STORE_DEFAULT_PROTOCOL` to specify which provider to use for new uploads:

```bash
# Use S3 for new uploads (old data without prefix still uses default provider)
OBJECT_STORE_DEFAULT_PROTOCOL=s3
```

### Migration Guide

To migrate from R2 to S3 without breaking existing runs:

<Steps>
<Step title="Configure S3 provider">
Add S3 credentials as a named provider:

```bash
OBJECT_STORE_S3_BASE_URL=https://s3.amazonaws.com
OBJECT_STORE_S3_ACCESS_KEY_ID=...
OBJECT_STORE_S3_SECRET_ACCESS_KEY=...
OBJECT_STORE_S3_REGION=us-east-1
```

Keep your existing `OBJECT_STORE_*` variables (R2) as the default provider.

</Step>

<Step title="Test the configuration">
Restart the webapp and verify both providers work:

- Old runs (no prefix) should still access R2
- New runs with `s3://` prefix should use S3

</Step>

<Step title="Switch to S3 for new uploads">
Set the default protocol to use S3 for new uploads:

```bash
OBJECT_STORE_DEFAULT_PROTOCOL=s3
```

After this change:

- New data uses `s3://` prefix and goes to S3
- Old data (no prefix) still uses R2
- Data with explicit protocol uses the corresponding provider

</Step>

<Step title="Optionally decommission R2">
Once all active runs using R2 data have completed (check your data retention policies), you can remove the R2 credentials. Keep `OBJECT_STORE_DEFAULT_PROTOCOL=s3` to ensure new data continues using S3.
</Step>
</Steps>
