# Configuration Options

You will learn: What configuration sources are supported by OpenFlare Server, frontend builds, and Agents; what the default configuration values are; and how to configure common deployment combinations.

This document aggregates the currently supported configuration options for OpenFlare Server and Agent in version `1.0.0`, keeping only running parameters that are currently active.

## Configuration Sources

The Server supports three types of configuration sources:

1. CLI arguments.
2. Environment variables.
3. Runtime configurations in the database `options` table.

The Agent supports:

1. The `-config` CLI argument.
2. The `agent.json` configuration file.
3. A small set of environment variables for overriding logs and settings.

The Relay (Server-side) supports:

1. The `-config` CLI argument.
2. The `relay.json` configuration file.
3. Persistent environment variables for overriding runtime flags.

The Client (Intranet Client) supports:

1. The `-config` CLI argument.
2. The `flared.json` configuration file.
3. Startup overrides and logging environment variables.

## Configuration File Locations

| Component | Default Location | Description |
| --- | --- | --- |
| Server SQLite | `openflare.db` | Can be customized via `SQLITE_PATH` |
| Agent Config | `./agent.json` | Can be specified via `-config` |
| One-Click Agent | `/opt/openflare-agent/agent.json` | Generated by the installation script by default |
| Agent Data Dir | `data` in the config folder | Can be customized via `data_dir` |
| Relay Config | `./relay.json` | Can be specified via `-config` |
| One-Click Relay | `/opt/openflare-relay/relay.json` | Generated by the installation script by default |
| Client Config | `./flared.json` | Can be specified via `-config` |
| One-Click Client | `/opt/openflared/flared.json` | Generated by the installation script by default |

## Server CLI Arguments

```bash
cd openflare-server
go run . --port 3000 --log-dir ./logs
```

| Argument | Description | Default Value |
| --- | --- | --- |
| `--port` | Port the Server listens on | `3000` |
| `--log-dir` | Directory to output logs | Empty (stdout) |
| `--version` | Outputs current version and exits | `false` |
| `--help` | Outputs help information and exits | `false` |

## Server Environment Variables

| Environment Variable | Description | Default Value |
| --- | --- | --- |
| `PORT` | Port the Server listens on | `3000` |
| `GIN_MODE` | Gin framework running mode | Defaults to release unless `debug` |
| `LOG_LEVEL` | Logging level | `info` |
| `SESSION_SECRET` | Session signing key | Randomly generated on startup |
| `SQLITE_PATH` | SQLite database file path | `openflare.db` |
| `DSN` | PostgreSQL DSN (takes precedence over SQLite) | Empty |
| `SQL_DSN` | Legacy PostgreSQL DSN (lower priority than `DSN`) | Empty |
| `REDIS_CONN_STRING` | Redis connection string | Empty |
| `AGENT_TOKEN` | Legacy global Agent Token | Empty |

Notes:

* If both `DSN` and `SQL_DSN` exist, `DSN` is prioritized.
* If either `DSN` or `SQL_DSN` coexist with `SQLITE_PATH`, PostgreSQL is prioritized.
* If the target PostgreSQL database is empty and a local SQLite file exists at `SQLITE_PATH`, the Server automatically migrates SQLite data table-by-table on startup.
* `SESSION_SECRET` must be explicitly configured in production.
* If `REDIS_CONN_STRING` is unconfigured, co-located features fall back to in-memory implementations.

## Runtime Options

The following options are maintained in the admin settings page and support hot reloading:

| Parameter | Description | Default Value |
| --- | --- | --- |
| `AgentHeartbeatInterval` | Heartbeat interval for Agents (ms) | `10000` |
| `AgentWebsocketUpgradeEnabled` | Toggles WebSocket upgrades after successful HTTP heartbeat | `true` |
| `NodeOfflineThreshold` | Threshold duration to mark a node offline (ms) | `120000` |
| `AgentUpdateRepo` | GitHub repository for Agent self-updates | `Rain-kl/OpenFlare` |
| `GeoIPProvider` | Geolocation resolution provider | `ipinfo` |
| `DatabaseAutoCleanupEnabled` | Toggles daily automatic cleanup of observability logs | `false` |
| `DatabaseAutoCleanupRetentionDays` | Data retention duration in days, minimum 1 day | `30` |
| `GlobalApiRateLimitNum` / `GlobalApiRateLimitDuration` | Global API rate limit count / window | `300` / `180` |
| `GlobalWebRateLimitNum` / `GlobalWebRateLimitDuration` | Global Web rate limit count / window | `300` / `180` |
| `CriticalRateLimitNum` / `CriticalRateLimitDuration` | Sensitive API rate limit count / window | `100` / `1200` |

Notes:

* When `DatabaseAutoCleanupEnabled` is enabled, the Server deletes `node_access_logs`, `node_metric_snapshots`, and `node_request_reports` daily at 3:00 AM.
* `DatabaseAutoCleanupRetentionDays` must be greater than or equal to 1.
* Leaving retention days blank during a manual trigger in the console deletes all historic logs instantly.
* The GitHub Release in `AgentUpdateRepo` must contain a matching `.sha256` checksum file for every Agent binary (e.g., `openflare-agent-linux-amd64.sha256`); the Agent validates this checksum before replacing the local executable.
* Third-party logins no longer use `GitHubOAuthEnabled`, `GitHubClientId`, and `GitHubClientSecret` as main configuration entrypoints; these legacy options are used only for migrating default GitHub credentials during upgrades.
* The legacy WeChat login options are kept for backward compatibility, but the option page no longer edits them.
* Legacy Cloudflare Turnstile options and validation logic are retained and will work normally.

## OpenResty Parameters

OpenResty performance and caching parameters are managed in the `options` table, including:

* `OpenRestyWorkerProcesses`
* `OpenRestyWorkerConnections`
* `OpenRestyWorkerRlimitNofile`
* `OpenRestyKeepaliveTimeout`
* `OpenRestyProxyConnectTimeout`
* `OpenRestyProxySendTimeout`
* `OpenRestyProxyReadTimeout`
* `OpenRestyProxyBufferingEnabled`
* `OpenRestyGzipEnabled`
* `OpenRestyCacheEnabled`
* `OpenRestyCachePath`
* `OpenRestyCacheMaxSize`

These parameters must be validated, saved, and rendered structurally.

Constraints:

* The console no longer exposes `resolver` settings.
* Upstreams are rendered uniformly as named `upstream` blocks with keepalive enabled.
* Single upstreams carrying a base path or query have their URI correctly appended in `proxy_pass`.
* Multi-upstreams must be pure `scheme://host[:port]` using the same protocol within a single rule.
* `OpenRestyCacheEnabled` enables cache infrastructure and global defaults; the actual caching matching policies (by URL, suffix, or path) are configured per `proxy_routes`.
* The default cache key is `$scheme$host$request_uri`.
* Default `keepalive_timeout` is `20` seconds; default `proxy_connect_timeout` is `3` seconds.
* The default event model is `epoll` with `multi_accept` enabled.
* HTTPS listeners use the independent `http2 on;` directive to avoid deprecation warnings for `listen ... http2` in newer Nginx/OpenResty versions.

## Frontend Build Environment Variables

| Environment Variable | Description | Default Value |
| --- | --- | --- |
| `NEXT_PUBLIC_API_BASE_URL` | Base path for frontend API calls | `/api` |
| `NEXT_PUBLIC_APP_VERSION` | Application version shown in the UI | `dev` |
| `NEXT_DEV_BACKEND_URL` | Target backend proxied by the local dev server | `http://127.0.0.1:3000` |

## Agent Environment Variables

| Environment Variable | Description | Default Value |
| --- | --- | --- |
| `LOG_LEVEL` | Logging level for the Agent | `info` |
| `OPENFLARE_SERVER_URL` | Server URL; overrides `agent.json` | Empty |
| `OPENFLARE_AGENT_TOKEN` | Node-specific Token; overrides `agent.json` | Empty |
| `OPENFLARE_DISCOVERY_TOKEN` | Auto-registration Token; overrides `agent.json` | Empty |
| `OPENFLARE_NODE_NAME` | Node name; overrides `agent.json` | Empty |
| `OPENFLARE_NODE_IP` | Node IP; overrides `agent.json` | Empty |
| `OPENFLARE_DATA_DIR` | Agent data directory; overrides `agent.json` | Empty |
| `OPENFLARE_OPENRESTY_PATH` | Path to OpenResty binary; overrides `agent.json` | Empty |
| `OPENFLARE_HEARTBEAT_INTERVAL` | Heartbeat interval; overrides `agent.json` | Empty |
| `OPENFLARE_REQUEST_TIMEOUT` | Request timeout; overrides `agent.json` | Empty |
| `OPENFLARE_OPENRESTY_OBSERVABILITY_PORT` | Local observability port; overrides `agent.json` | Empty |
| `OPENFLARE_MMDB_PATH` | WAF GeoIP mmdb path; overrides `agent.json` | Empty |
| `OPENFLARE_MMDB_UPDATE_INTERVAL` | GeoIP mmdb update interval; overrides `agent.json` | Empty |
| `OPENFLARE_MMDB_DOWNLOAD_URL` | GeoIP mmdb download link; overrides `agent.json` | Empty |

## Agent CLI Arguments

| Argument | Description | Default Value |
| --- | --- | --- |
| `-config` | Path to the Agent configuration file | `./agent.json` |

## Agent Configurations Fields

| Field | Description | Required | Default Value / Behavior |
| --- | --- | --- | --- |
| `server_url` | Control plane URL | Yes | None |
| `agent_token` | Node-specific access Token | Mutually exclusive with discovery_token | Empty |
| `discovery_token` | Global auto-registration Token | Mutually exclusive with agent_token | Empty |
| `node_name` | Node name | No | Hostname |
| `node_ip` | Node IP | No | Auto-detect, resolves outbound public IP via realip.cc first, falls back to local adapters |
| `openresty_path` | Path to the OpenResty binary | No | `"openresty"` |
| `openresty_observability_port` | Observability port for health checks | No | `18081` |
| `data_dir` | Agent data directory | No | `data` in the config folder |
| `main_config_path` | Write path for Nginx main configuration | No | `data_dir/etc/nginx/nginx.conf` |
| `route_config_path` | Write path for route configurations | No | `data_dir/etc/nginx/conf.d/openflare_routes.conf` |
| `access_log_path` | Write path for OpenResty access logs | No | `data_dir/var/log/openflare/access.log` |
| `cert_dir` | Write directory for SSL certificates | No | `data_dir/etc/nginx/certs` |
| `openresty_cert_dir` | Read directory for certificates in Nginx | No | Same as `cert_dir` |
| `lua_dir` | Write directory for Lua scripts and assets | No | `data_dir/etc/nginx/lua` |
| `openresty_lua_dir` | Read directory for Lua scripts in Nginx | No | Same as `lua_dir` |
| `runtime_config_dir` | Write directory for Agent runtime configs | No | `data_dir/etc/openflare` |
| `mmdb_path` | WAF GeoIP database file path | No | `data_dir/etc/openflare/GeoLite2-Country.mmdb` |
| `mmdb_update_interval` | WAF GeoIP database check interval | No | `86400000` milliseconds |
| `mmdb_download_url` | WAF GeoIP database download URL | No | Built-in GeoLite2 Country URL |
| `observability_buffer_path` | Buffer path for retry metrics logs | No | `data_dir/var/lib/openflare/observability-buffer.json` |
| `observability_replay_minutes` | Lookback window for metric retries | No | `15` |
| `state_path` | Path to store local state JSON file | No | `data_dir/var/lib/openflare/agent-state.json` |
| `heartbeat_interval` | Heartbeat polling interval | No | `10000` milliseconds |
| `request_timeout` | HTTP request timeout duration | No | `10000` milliseconds |

Notes:

* `agent_token` and `discovery_token` cannot both be empty.
* `heartbeat_interval` and `request_timeout` support integer milliseconds or Go duration strings.
* If `AgentWebsocketUpgradeEnabled` is enabled on the Server, the Agent upgrades the HTTP heartbeat to WebSocket; it automatically falls back to HTTP heartbeats if it fails or disconnects.
* If `openresty_path` is left blank, the Agent calls `openresty` on the host.
* Periodic health checks query `http://127.0.0.1:<openresty_observability_port>/openflare/stub_status` instead of executing `openresty -t`; validation prior to reloads, starts, or rollbacks still runs `openresty -t -c <main_config_path>`.
* The Agent initializes and periodically updates `mmdb_path` to support GeoIP region checks; failures to update write warnings and do not disrupt configuration synchronizations.
* The Agent boots normally if `agent.json` is missing but environment variables (`OPENFLARE_SERVER_URL` and a Token) are available; environment variables override JSON settings.
* If `node_ip` is left blank, the Agent resolves its outbound IP via `https://realip.cc` first, which is suitable for Docker/NAT networks.
* If the Agent registers a private `node_ip`, the Server prioritizes saving the public TCP connection IP, preventing NAT adapters from registering internal IPs.
* Enabling "Lock Node IP" in the console retains the manual IP; subsequent Agent registration or heartbeats do not overwrite it.

## Relay Environment Variables

| Environment Variable | Description | Default Value |
| --- | --- | --- |
| `LOG_LEVEL` | Logging level for the Relay | `info` |
| `OPENFLARE_SERVER_URL` | Server URL; overrides `relay.json` | Empty |
| `OPENFLARE_AGENT_TOKEN` | Node-specific Token; overrides `relay.json` | Empty |
| `OPENFLARE_DISCOVERY_TOKEN` | Auto-registration Token; overrides `relay.json` | Empty |
| `OPENFLARE_NODE_NAME` | Node name; overrides `relay.json` | Empty |
| `OPENFLARE_NODE_IP` | Node IP; overrides `relay.json` | Empty |
| `OPENFLARE_DATA_DIR` | Relay data directory; overrides `relay.json` | Empty |
| `OPENFLARE_FRPS_PATH` | frps binary path; overrides `relay.json` | Empty |

## Relay CLI Arguments

| Argument | Description | Default Value |
| --- | --- | --- |
| `-config` | Path to the Relay configuration file | `./relay.json` |

## Relay Configuration Fields

| Field | Description | Required | Default Value / Behavior |
| --- | --- | --- | --- |
| `server_url` | Control plane URL | Yes | None |
| `agent_token` | Node-specific access Token | Mutually exclusive with discovery_token | Empty |
| `discovery_token` | Global auto-registration Token | Mutually exclusive with agent_token | Empty |
| `node_name` | Node name | No | Hostname |
| `node_ip` | Relay listening IP for tunnel traffic | No | Auto-detect, prioritizes outbound public IP |
| `frps_path` | Path to the `frps` binary | No | `frps` (system PATH) |
| `data_dir` | Relay runtime data directory | No | `data` in the config folder |
| `state_path` | Path to store local state JSON file | No | `data_dir/relay-state.json` |
| `heartbeat_interval` | Heartbeat polling interval | No | `10000` milliseconds, supports Go duration strings |
| `request_timeout` | HTTP request timeout duration | No | `10000` milliseconds, supports Go duration strings |

## OpenFlared (Client) Environment Variables

| Environment Variable | Description | Default Value |
| --- | --- | --- |
| `LOG_LEVEL` | Logging level for the client | `info` |
| `OPENFLARE_SERVER_URL` | Server URL; overrides `flared.json` | Empty |
| `OPENFLARE_TUNNEL_TOKEN` | Tunnel access Token; overrides `flared.json` | Empty |
| `OPENFLARE_DATA_DIR` | Client data directory; overrides `flared.json` | Empty |
| `OPENFLARE_FRPC_PATH` | frpc binary path; overrides `flared.json` | Empty |

## OpenFlared (Client) CLI Arguments

| Argument | Description | Default Value |
| --- | --- | --- |
| `-config` | Path to the client configuration file | `./flared.json` |

## OpenFlared (Client) Configuration Fields

| Field | Description | Required | Default Value / Behavior |
| --- | --- | --- | --- |
| `server_url` | Control plane URL | Yes | None |
| `tunnel_token` | Tunnel dedicated access Token | Yes | None |
| `frpc_path` | Path to the `frpc` binary | No | `frpc` (system PATH) |
| `data_dir` | Client runtime data directory | No | `data` in the config folder |
| `state_path` | Path to store local state JSON file | No | `data_dir/flared-state.json` |
| `heartbeat_interval` | Heartbeat polling interval | No | `10000` milliseconds, supports Go duration strings |
| `sync_interval` | Configuration sync interval | No | `30000` milliseconds, supports Go duration strings |
| `request_timeout` | HTTP request timeout duration | No | `10000` milliseconds, supports Go duration strings |

## Common Configuration Combos

### Production Server + PostgreSQL

```bash
export SESSION_SECRET='replace-with-a-long-random-string'
export DSN='postgres://openflare:replace-with-strong-password@postgres:5432/openflare?sslmode=disable'
export GIN_MODE='release'
export LOG_LEVEL='info'
```

### Local Server + SQLite

```bash
export SESSION_SECRET='dev-session-secret'
export SQLITE_PATH='./openflare-dev.db'
export LOG_LEVEL='debug'
go run .
```

### Agent + Default OpenResty

```json
{
  "server_url": "http://your-server:3000",
  "agent_token": "replace-with-node-auth-token",
  "data_dir": "/opt/openflare-agent/data",
  "openresty_path": "openresty",
  "heartbeat_interval": 10000,
  "request_timeout": 10000
}
```

### Agent + Customized OpenResty Paths

```json
{
  "server_url": "http://your-server:3000",
  "agent_token": "replace-with-node-auth-token",
  "data_dir": "/var/lib/openflare-agent",
  "openresty_path": "/usr/local/openresty/nginx/sbin/openresty",
  "main_config_path": "/var/lib/openflare-agent/etc/nginx/nginx.conf",
  "route_config_path": "/var/lib/openflare-agent/etc/nginx/conf.d/openflare_routes.conf",
  "access_log_path": "/var/lib/openflare-agent/var/log/openflare/access.log",
  "cert_dir": "/var/lib/openflare-agent/etc/nginx/certs",
  "lua_dir": "/var/lib/openflare-agent/etc/nginx/lua",
  "runtime_config_dir": "/var/lib/openflare-agent/etc/openflare",
  "heartbeat_interval": 10000,
  "request_timeout": 10000
}
```

### Relay (Server-side) Default Configuration

`relay.json`:

```json
{
  "server_url": "http://your-server:3000",
  "agent_token": "replace-with-relay-auth-token",
  "frps_path": "frps",
  "data_dir": "/opt/openflare-relay/data",
  "heartbeat_interval": 10000,
  "request_timeout": 10000
}
```

### OpenFlared (Client-side) Default Configuration

`flared.json`:

```json
{
  "server_url": "http://your-server:3000",
  "tunnel_token": "replace-with-tunnel-token",
  "frpc_path": "frpc",
  "data_dir": "/opt/openflared/data",
  "heartbeat_interval": 10000,
  "sync_interval": 30000,
  "request_timeout": 10000
}
```

## Maintenance Rules

This document must be updated in sync when any of the following change:

* Server CLI arguments.
* Server environment variables.
* Agent CLI arguments and configuration parameters.
* Relay CLI arguments and configuration parameters.
* Client CLI arguments and configuration parameters.
* Default values, scopes, or examples of any configuration items.