DC/OS Logging with the ELK Stack

The Data Center Operating System (DC/OS) is a platform that operates as a cluster-scale operating system, designed to manage complex configurations of numerous Linux nodes, providing software-defined services and automation for applications running on these clusters. It enables the development of distributed systems with access to core platform services like persistent storage and analytics, distinguishing itself from configuration tools such as Ansible, Chef, or Puppet. For effective monitoring, a centralized logging system is essential, and the article outlines a method to configure DC/OS nodes to report their logs to the ELK Stack using Filebeat, particularly focusing on a setup for nodes running CentOS 7. The logs from DC/OS components, typically managed by systemd-journald, are gathered into a single log file, which Filebeat then transfers to Elasticsearch for indexing, allowing for analysis in Kibana or shipping to services like Logz.io. The guide assumes that most DC/OS components output logs to stderr or stdout, but acknowledges that some components may require additional configuration to ensure all relevant logs are captured.