31 lines
1.2 KiB
Markdown
31 lines
1.2 KiB
Markdown
# Log Collecting And Analysis
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## Collecting
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There are various ways to collect logs from application.
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### Java agent's toolkits
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Java agent provides toolkit for
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[log4j](../service-agent/java-agent/Application-toolkit-log4j-1.x.md),
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[log4j2](../service-agent/java-agent/Application-toolkit-log4j-2.x.md),
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[logback](../service-agent/java-agent/Application-toolkit-logback-1.x.md)
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to report logs through gRPC with automatic injected trace context.
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[SkyWalking Satellite sidecar](https://github.com/apache/skywalking-satellite) is a recommended proxy/side to
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forward logs including to use Kafka MQ to transport logs. When use this, need to open [kafka-fetcher](backend-fetcher.md#kafka-fetcher).
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## Log Analyzer
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Log analyzer of OAP server supports native log data. OAP could use Log Analysis Language to
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structurize log content through parse, extract, and save logs.
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Also the analyzer leverages Meter Analysis Language Engine for further metrics calculation.
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```yaml
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log-analyzer:
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selector: ${SW_LOG_ANALYZER:default}
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default:
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lalFiles: ${SW_LOG_LAL_FILES:default}
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malFiles: ${SW_LOG_MAL_FILES:""}
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```
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Read [Log Analysis Language](../../concepts-and-designs/lal.md) documentation to learn log structurize and metrics analysis. |