kubo/docs/environment-variables.md
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# Kubo environment variables
## `IPFS_PATH`
Sets the location of the IPFS repo (where the config, blocks, etc.
are stored).
Default: ~/.ipfs
## `IPFS_LOGGING`
Specifies the log level for Kubo.
`IPFS_LOGGING` is a deprecated alias for the `GOLOG_LOG_LEVEL` environment variable. See below.
## `IPFS_LOGGING_FMT`
Specifies the log message format.
`IPFS_LOGGING_FMT` is a deprecated alias for the `GOLOG_LOG_FMT` environment variable. See below.
## `GOLOG_LOG_LEVEL`
Specifies the log-level, both globally and on a per-subsystem basis. Level can be one of:
* `debug`
* `info`
* `warn`
* `error`
* `dpanic`
* `panic`
* `fatal`
Per-subsystem levels can be specified with `subsystem=level`. One global level and one or more per-subsystem levels
can be specified by separating them with commas.
Default: `error`
Example:
```console
GOLOG_LOG_LEVEL="error,core/server=debug" ipfs daemon
```
Logging can also be configured at runtime, both globally and on a per-subsystem basis, with the `ipfs log` command.
## `GOLOG_LOG_FMT`
Specifies the log message format. It supports the following values:
- `color` -- human readable, colorized (ANSI) output
- `nocolor` -- human readable, plain-text output.
- `json` -- structured JSON.
For example, to log structured JSON (for easier parsing):
```bash
export GOLOG_LOG_FMT="json"
```
The logging format defaults to `color` when the output is a terminal, and `nocolor` otherwise.
## `GOLOG_FILE`
Sets the file to which Kubo logs. By default, Kubo logs to standard error.
## `GOLOG_TRACING_FILE`
Sets the file to which Kubo sends tracing events. By default, tracing is
disabled.
This log can be read at runtime (without writing it to a file) using the `ipfs
log tail` command.
Warning: Enabling tracing will likely affect performance.
## `IPFS_FUSE_DEBUG`
If SET, enables fuse debug logging.
Default: false
## `YAMUX_DEBUG`
If SET, enables debug logging for the yamux stream muxer.
Default: false
## `IPFS_FD_MAX`
Sets the file descriptor limit for Kubo. If Kubo fails to set the file
descriptor limit, it will log an error.
Defaults: 2048
## `IPFS_DIST_PATH`
IPFS Content Path from which Kubo fetches repo migrations (when the daemon
is launched with the `--migrate` flag).
Default: `/ipfs/<cid>` (the exact path is hardcoded in
`migrations.CurrentIpfsDist`, depends on the IPFS version)
## `IPFS_NS_MAP`
Adds static namesys records for deterministic tests and debugging.
Useful for testing things like DNSLink without real DNS lookup.
Example:
```console
$ IPFS_NS_MAP="dnslink-test1.example.com:/ipfs/bafkreicysg23kiwv34eg2d7qweipxwosdo2py4ldv42nbauguluen5v6am,dnslink-test2.example.com:/ipns/dnslink-test1.example.com" ipfs daemon
...
$ ipfs resolve -r /ipns/dnslink-test2.example.com
/ipfs/bafkreicysg23kiwv34eg2d7qweipxwosdo2py4ldv42nbauguluen5v6am
```
## `IPFS_HTTP_ROUTERS`
Overrides all implicit HTTP routers enabled when `Routing.Type=auto` with
the space-separated list of URLs provided in this variable.
Useful for testing and debugging in offline contexts.
Example:
```console
$ ipfs config Routing.Type auto
$ IPFS_HTTP_ROUTERS="http://127.0.0.1:7423" ipfs daemon
```
The above will replace implicit HTTP routers with single one, allowing for
inspection/debug of HTTP requests sent by Kubo via `while true ; do nc -l 7423; done`
or more advanced tools like [mitmproxy](https://docs.mitmproxy.org/stable/#mitmproxy).
Default: `config.DefaultHTTPRouters`
## `IPFS_HTTP_ROUTERS_FILTER_PROTOCOLS`
Overrides values passed with `filter-protocols` parameter defined in IPIP-484.
Value is space-separated.
```console
$ IPFS_HTTP_ROUTERS_FILTER_PROTOCOLS="unknown transport-bitswap transport-foo" ipfs daemon
```
Default: `config.DefaultHTTPRoutersFilterProtocols`
## `IPFS_CONTENT_BLOCKING_DISABLE`
Disables the content-blocking subsystem. No denylists will be watched and no
content will be blocked.
## `LIBP2P_TCP_REUSEPORT`
Kubo tries to reuse the same source port for all connections to improve NAT
traversal. If this is an issue, you can disable it by setting
`LIBP2P_TCP_REUSEPORT` to false.
Default: `true`
## `LIBP2P_TCP_MUX`
By default Kubo tries to reuse the same listener port for raw TCP and WebSockets transports via experimental `libp2p.ShareTCPListener()` feature introduced in [go-libp2p#2984](https://github.com/libp2p/go-libp2p/pull/2984).
If this is an issue, you can disable it by setting `LIBP2P_TCP_MUX` to `false` and use separate ports for each TCP transport.
> [!CAUTION]
> This configuration option may be removed once `libp2p.ShareTCPListener()` becomes default in go-libp2p.
Default: `true`
## `LIBP2P_MUX_PREFS`
Deprecated: Use the `Swarm.Transports.Multiplexers` config field.
Tells Kubo which multiplexers to use in which order.
Default: "/yamux/1.0.0 /mplex/6.7.0"
## `LIBP2P_RCMGR`
Forces [libp2p Network Resource Manager](https://github.com/libp2p/go-libp2p-resource-manager#readme)
to be enabled (`1`) or disabled (`0`).
When set, overrides [`Swarm.ResourceMgr.Enabled`](https://github.com/ipfs/kubo/blob/master/docs/config.md#swarmresourcemgrenabled) from the config.
Default: use config (not set)
## `LIBP2P_DEBUG_RCMGR`
Enables tracing of [libp2p Network Resource Manager](https://github.com/libp2p/go-libp2p-resource-manager#readme)
and outputs it to `rcmgr.json.gz`
Default: disabled (not set)
# Tracing
For tracing configuration, please check: https://github.com/ipfs/boxo/blob/main/docs/tracing.md