184 lines
3.3 KiB
Markdown
184 lines
3.3 KiB
Markdown
---
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title: "Traefik Logs Documentation"
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description: "Logs are a key part of observability in Traefik Proxy. Read the technical documentation to learn their configurations, rotations, and time zones."
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---
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# 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
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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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```yaml tab="File (YAML)"
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# Writing Logs to a File
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log:
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filePath: "/path/to/traefik.log"
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```
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```toml tab="File (TOML)"
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# Writing Logs to a File
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[log]
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filePath = "/path/to/traefik.log"
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```
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```bash tab="CLI"
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# Writing Logs to a File
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--log.filePath=/path/to/traefik.log
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```
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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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```yaml tab="File (YAML)"
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# Writing Logs to a File, in JSON
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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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```toml tab="File (TOML)"
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# Writing Logs to a File, in JSON
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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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```bash tab="CLI"
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# Writing Logs to a File, in JSON
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--log.filePath=/path/to/traefik.log
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--log.format=json
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```
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#### `level`
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By default, the `level` is set to `ERROR`.
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Alternative logging levels are `TRACE`, `DEBUG`, `INFO`, `WARN`, `ERROR`, `FATAL`, and `PANIC`.
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```yaml tab="File (YAML)"
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log:
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level: DEBUG
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```
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```toml tab="File (TOML)"
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[log]
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level = "DEBUG"
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```
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```bash tab="CLI"
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--log.level=DEBUG
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```
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#### `noColor`
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When using the 'common' format, disables the colorized output.
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```yaml tab="File (YAML)"
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log:
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noColor: true
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```
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```toml tab="File (TOML)"
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[log]
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noColor = true
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```
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```bash tab="CLI"
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--log.nocolor=true
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```
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## Log Rotation
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The rotation of the log files can be configured with the following options.
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### `maxSize`
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`maxSize` is the maximum size in megabytes of the log file before it gets rotated.
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It defaults to 100 megabytes.
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```yaml tab="File (YAML)"
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log:
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maxSize: 1
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```
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```toml tab="File (TOML)"
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[log]
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maxSize = 1
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```
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```bash tab="CLI"
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--log.maxsize=1
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```
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### `maxBackups`
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`maxBackups` is the maximum number of old log files to retain.
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The default is to retain all old log files (though `maxAge` may still cause them to get deleted).
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```yaml tab="File (YAML)"
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log:
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maxBackups: 3
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```
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```toml tab="File (TOML)"
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[log]
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maxBackups = 3
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```
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```bash tab="CLI"
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--log.maxbackups=3
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```
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### `maxAge`
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`maxAge` is the maximum number of days to retain old log files based on the timestamp encoded in their filename.
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Note that a day is defined as 24 hours and may not exactly correspond to calendar days due to daylight savings, leap seconds, etc.
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The default is not to remove old log files based on age.
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```yaml tab="File (YAML)"
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log:
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maxAge: 3
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```
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```toml tab="File (TOML)"
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[log]
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maxAge = 3
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```
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```bash tab="CLI"
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--log.maxage=3
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```
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### `compress`
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`compress` determines if the rotated log files should be compressed using gzip.
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The default is not to perform compression.
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```yaml tab="File (YAML)"
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log:
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compress: true
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```
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```toml tab="File (TOML)"
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[log]
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compress = true
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```
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```bash tab="CLI"
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--log.compress=true
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```
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{!traefik-for-business-applications.md!}
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