Cortex logstash logback support missing

Feature Request

Work Environment

Problem Description

Cortex cant sent appliaction logs to the logstash because some dependencie is missing.

Steps to Reproduce

1. Modify logback.xml

Add

  <appender name="STASH"
        class="net.logstash.logback.appender.LogstashTcpSocketAppender">
        <destination>192.168.99.100:5000</destination>
 </appender>

and append the root section with this:

<appender-ref ref="LOGSTASH" />

2. start cortex

3. read the log

11:50:05,015 |-ERROR in ch.qos.logback.core.joran.action.AppenderAction - Could not create an Appender of type [net.logstash.logback.appender.LogstashTcpSocketAppender]. ch.qos.logback.core.util.DynamicClassLoadingException: Failed to instantiate type net.logstash.logback.appender.LogstashTcpSocketAppender at ch.qos.logback.core.util.DynamicClassLoadingException: Failed to instantiate type net.logstash.logback.appender.LogstashTcpSocketAppender Caused by: java.lang.ClassNotFoundException: net.logstash.logback.appender.LogstashTcpSocketAppender

Possible Solutions

Maybe this: https://stackoverflow.com/questions/46582135/logstash-failed-to-instantiate-type-net-logstash-logback-appender-logstashtcps

Start with the logback.xml configuration and the reported ClassNotFoundException for net.logstash.logback.appender.LogstashTcpSocketAppender. Check how Cortex packages its logging dependencies and compare the proposed dependency guidance in the linked Stack Overflow discussion. Done means Cortex starts with the appender configured and application logs can be sent to Logstash without the class-loading error.