50 lines
1.2 KiB
Markdown
50 lines
1.2 KiB
Markdown
# Logs
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Reading What's Happening
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{: .subtitle }
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By default, logs are written to stdout, in text format.
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## Configuration Example
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??? example "Writing Logs in a File"
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```toml
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[log]
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filePath = "/path/to/traefik.log"
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```
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??? example "Writing Logs in a File, in JSON"
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```toml
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[log]
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filePath = "/path/to/log-file.log"
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format = "json"
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```
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## Configuration Options
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### General
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Traefik logs concern everything that happens to Traefik itself (startup, configuration, events, shutdown, and so on).
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#### filePath
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By default, the logs are written to the standard output.
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You can configure a file path instead using the `filePath` option.
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#### format
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By default, the logs use a text format (`common`), but you can also ask for the `json` format in the `format` option.
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#### logLevel
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By default, the `logLevel` is set to `error`, but you can choose amongst `debug`, `panic`, `fatal`, `error`, `warn`, and `info`.
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## Log Rotation
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Traefik will close and reopen its log files, assuming they're configured, on receipt of a USR1 signal.
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This allows the logs to be rotated and processed by an external program, such as `logrotate`.
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!!! note
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This does not work on Windows due to the lack of USR signals.
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