Graylog server snap, https://www.graylog.org/
Graylog is a full-featured log management system allowing for centralized
management, processing and alerting on logs from applications and systems.
At a miniumum update the configuration at /var/snap/graylog/common/server.conf
to set the admin password and mongodb connection string. Connection information
for elastic search is also needed, refer to the Graylog documentation.