wget http://packages.graylog2.org/releases/graylog2-setup/graylog2-setup-0.92.1.tar.gz

wget https://www.graylog2.org/download/release/graylog2-server/548a1deae4b0a06d87eea030

wget https://www.graylog2.org/download/release/graylog2-web-interface/548a1deae4b0a06d87eea030

https://www.graylog2.org/resources/documentation/setup/quicksetupapp

logstash, elasticsearch, kibana
Splunk
graylog2 
loggly
logfaces
fluentd 
Kafka 

syslog-ng => rabbitmq => elasticsearch
syslog-ng + patterndb