About Logging Components in Verrazzano

The Verrazzano logging stack consists of Fluentd, OpenSearch, and OpenSearch Dashboards components.

• Fluentd: a log aggregator that collects, processes, and formats logs from Kubernetes clusters.
• OpenSearch: a scalable search and analytics engine for storing Kubernetes logs.
• OpenSearch Dashboards: a visualization layer that provides a user interface to query and visualize collected logs.

As shown in the following diagram, logs written to stdout by a container running on Kubernetes are picked up by the kubelet service running on that node and written to /var/log/containers.