Missing output section of the 20-syslog.conf file

[wylde780]

The latest file is lacking an output section and even when I add one the pattern rules are not working.

[2019-09-28T23:14:45,196][ERROR][logstash.javapipeline ] Pipeline aborted due to error {:pipeline_id=>"pihole", :exception=>#<Grok::PatternError: pattern %{DNSMASQPREFIX} not defined>, :backtrace=>["/usr/share/logstash/vendor/bundle/jruby/2.5.0/gems/jls-grok-0.11.5/lib/grok-pure.rb:123:in block in compile'", "org/jruby/RubyKernel.java:1425:in loop'", "/usr/share/logstash/vendor/bundle/jruby/2.5.0/gems/jls-grok-0.11.5/lib/grok-pure.rb:93:in compile'", "/usr/share/logstash/vendor/bundle/jruby/2.5.0/gems/logstash-filter-grok-4.1.1/lib/logstash/filters/grok.rb:274:in block in register'", "org/jruby/RubyArray.java:1792:in each'", "/usr/share/logstash/vendor/bundle/jruby/2.5.0/gems/logstash-filter-grok-4.1.1/lib/logstash/filters/grok.rb:268:in block in register'", "org/jruby/RubyHash.java:1419:in each'", "/usr/share/logstash/vendor/bundle/jruby/2.5.0/gems/logstash-filter-grok-4.1.1/lib/logstash/filters/grok.rb:263:in register'", "org/logstash/config/ir/compiler/AbstractFilterDelegatorExt.java:56:in register'", "/usr/share/logstash/logstash-core/lib/logstash/java_pipeline.rb:192:in block in register_plugins'", "org/jruby/RubyArray.java:1792:in each'", "/usr/share/logstash/logstash-core/lib/logstash/java_pipeline.rb:191:in register_plugins'", "/usr/share/logstash/logstash-core/lib/logstash/java_pipeline.rb:463:in maybe_setup_out_plugins'", "/usr/share/logstash/logstash-core/lib/logstash/java_pipeline.rb:204:in start_workers'", "/usr/share/logstash/logstash-core/lib/logstash/java_pipeline.rb:146:in run'", "/usr/share/logstash/logstash-core/lib/logstash/java_pipeline.rb:105:in block in start'"], :thread=>"#<Thread:0x20279df3 run>"}

Thanks

[nin9s]

thanks @wylde780
do you still get the pattern not defined error?
do you have patterns in /etc/logstash/

[nin9s]

should work now ...