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Agent skill
logback-config-rfc-27
RFC-27 compliant static Logback configuration for Java services. Covers logback.xml structure, appenders, encoders, and deployment-specific configuration. Use when setting up or reviewing logging configuration in Java services.
Install this agent skill to your Project
npx add-skill https://github.com/majiayu000/claude-skill-registry/tree/main/skills/data/logback-config-rfc-27
Metadata
Additional technical details for this skill
- tags
-
java logging rfc-27 logback configuration
- version
- 1.0.0
- category
- observability
- technology
- java
SKILL.md
Logback Configuration (RFC-27)
RFC-27 compliant static Logback configuration for Java services.
When to use this skill
- Setting up logging configuration for new Java services
- Reviewing or updating logback.xml configuration
- Configuring environment-specific logging
- Setting up log file rotation and retention
- Configuring appenders for different outputs (console, file, JSON)
Skill Contents
Sections
- When to use this skill (L24-L31)
- Quick Start (L52-L90)
- Configuration Structure (L91-L115)
- Appender Types (L116-L134)
- Environment Configuration (L135-L154)
- References (L155-L160)
- Related Rules (L161-L164)
- Related Skills (L165-L170)
Available Resources
📚 references/ - Detailed documentation
- configuration patterns
Quick Start
1. Create logback-spring.xml
Place in src/main/resources/logback-spring.xml:
<?xml version="1.0" encoding="UTF-8"?>
<configuration scan="true" scanPeriod="30 seconds">
<include resource="org/springframework/boot/logging/logback/defaults.xml"/>
<!-- Console appender for local development -->
<springProfile name="local">
<appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
<encoder>
<pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
</encoder>
</appender>
<root level="INFO">
<appender-ref ref="CONSOLE"/>
</root>
</springProfile>
<!-- JSON appender for production -->
<springProfile name="!local">
<appender name="JSON" class="ch.qos.logback.core.ConsoleAppender">
<encoder class="net.logstash.logback.encoder.LogstashEncoder"/>
</appender>
<root level="INFO">
<appender-ref ref="JSON"/>
</root>
</springProfile>
</configuration>
2. Do NOT Commit logback.xml to Git
Per RFC-27, logback.xml should NOT be in version control. Use logback-spring.xml instead, which supports Spring profiles.
Configuration Structure
Required Elements
| Element | Purpose |
|---|---|
<configuration> |
Root element with optional scan attributes |
<appender> |
Defines output destination |
<encoder> |
Formats log messages |
<root> |
Default logging level |
Spring Profile Integration
Use <springProfile> to apply configuration conditionally:
<springProfile name="production">
<!-- Production-specific config -->
</springProfile>
<springProfile name="!production">
<!-- Non-production config -->
</springProfile>
Appender Types
| Appender | Use Case |
|---|---|
ConsoleAppender |
Standard output (container logs) |
RollingFileAppender |
File with rotation |
AsyncAppender |
Non-blocking wrapper |
Console Appender (Production)
<appender name="JSON" class="ch.qos.logback.core.ConsoleAppender">
<encoder class="net.logstash.logback.encoder.LogstashEncoder">
<includeMdcKeyName>traceId</includeMdcKeyName>
<includeMdcKeyName>spanId</includeMdcKeyName>
</encoder>
</appender>
Environment Configuration
Log Levels per Environment
| Environment | Root Level | Notes |
|---|---|---|
local |
DEBUG | Verbose for development |
development |
INFO | Standard logging |
staging |
INFO | Match production |
production |
INFO | Minimize noise |
Logger Overrides
<!-- Reduce noise from specific libraries -->
<logger name="org.apache.kafka" level="WARN"/>
<logger name="org.springframework.web" level="INFO"/>
<logger name="com.bitso" level="DEBUG"/>
References
| Reference | Description |
|---|---|
| references/configuration-patterns.md | Detailed configuration examples |
Related Rules
- java-structured-logs - Structured logging standards (RFC-34)
Related Skills
| Skill | Purpose |
|---|---|
| structured-logs-rfc-34 | Structured logging format |
| dynamic-loglevel-rfc-27 | Runtime log level control |
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