Allow adding new Logstash logback appenders to che-server tomcat logback.xml

[sunix]

At the moment, it is not possible to add logstash-logback appenders to logback.xml. It would be useful to just provide a proper logback-additional-appenders.xml and nothing else

Reproduction Steps:
Adding a logback-additional-appenders.xml like

<?xml version="1.0" encoding="UTF-8"?>
<included>
    <appender name="file-json" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <file>${che.logs.dir}/logs/catalina.log.json</file>
        <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
          <level>info</level>
        </filter>
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>${che.logs.dir}/archive/%d{yyyy/MM/dd}/catalina.log.json</fileNamePattern>
            <maxHistory>${max.retention.days}</maxHistory>
        </rollingPolicy>
        <encoder class="net.logstash.logback.encoder.LogstashEncoder" />
    </appender>

    <root level="${che.logs.level:-INFO}">
        <appender-ref ref="file-json"/>
    </root>
</included>

won't work at the moment

Pull Requests

• Add dependencies to allow using additional logstash-logback appenders in logback.xml che-lib#42
• Adding logstash-logback dependencies to avoid classloading issue when using logstash-logback appenders #6539
• Adding logstash-logback-encoder 4.11 (che#6537) che-dependencies#60
• PR docs: Configuration of Logstash json file logback encoder and appenders che-docs#297

** PR for che6 **

• [che6] Adding logstash-logback dependencies to tomcat to enable logging in j… che-lib#58
• [che6] Adding logstash-logback dependencies to avoid classloading issue when… #7415
• [che6] Adding logstash-logback dependency (#6537) che-dependencies#73

[skabashnyuk]

closing after discussion with @l0rd