document RUST_LOG

docs/configuration/node-config.md

@@ -31,6 +31,7 @@ A commented example is available here: [quickwit.yaml](https://github.com/quickw
 | `data_dir` | Path to directory where data (tmp data, splits kept for caching purpose) is persisted. This is mostly used in indexing. | `QW_DATA_DIR` | `./qwdata` |
 | `metastore_uri` | Metastore URI. Can be a local directory or `s3://my-bucket/indexes` or `postgres://username:password@localhost:5432/metastore`. [Learn more about the metastore configuration](metastore-config.md). | `QW_METASTORE_URI` | `{data_dir}/indexes` |
 | `default_index_root_uri` | Default index root URI that defines the location where index data (splits) is stored. The index URI is built following the scheme: `{default_index_root_uri}/{index-id}` | `QW_DEFAULT_INDEX_ROOT_URI` | `{data_dir}/indexes` |
+| environment variable only | Log level of Quickwit. Can be a direct log level, or a comma separated list of `module_name=level` | `RUST_LOG` | `info` |
 
 ## REST configuration
 

docs/get-started/quickstart.md

@@ -62,6 +62,8 @@ docker run --rm -v $(pwd)/qwdata:/quickwit/qwdata -p 127.0.0.1:7280:7280 quickwi
 
 </Tabs>
 
+Tips: you can use the environment variable `RUST_LOG` to control quickwit verbosity.
+
 Check it's working by browsing the [UI at http://localhost:7280](http://localhost:7280) or do a simple GET with cURL:
 
 ```bash

docs/reference/cli.md

@@ -819,28 +819,15 @@ Disables [telemetry](../telemetry.md) when set to any non-empty value.
 
 `QW_DISABLE_TELEMETRY=1 quickwit help`
 
-<!--
-    End of auto-generated CLI docs
--->
+### RUST_LOG
 
-## Environment Variables
+Configure quickwit log level.
 
-### QW_CLUSTER_ENDPOINT
-
-Specifies the address of the cluster to connect to. Management commands `index`, `split` and `source` require the `cluster_endpoint`, which you can set once and for all with the `QW_CLUSTER_ENDPOINT` environment variable.
-
-### QW_CONFIG
-
-Specifies the path to the [quickwit config](../configuration/node-config.md). Commands `run` and `tools` require the `config`, which you can set once and for all with the `QW_CONFIG` environment variable.
-
-*Example*
-
-`export QW_CONFIG=config/quickwit.yaml`
-
-### QW_DISABLE_TELEMETRY
-
-Disables [telemetry](../telemetry.md) when set to any non-empty value.
-
-*Example*
+*Examples*
 
-`QW_DISABLE_TELEMETRY=1 quickwit help`
+```
+# run with higher verbosity
+RUST_LOG=debug quickwit run
+# run with log level info, except for indexing related logs
+RUST_LOG=info,quickwit_indexing=debug quickwit run
+```