https://github.com/fluent/fluent-plugin-opensearch
https://velog.io/@thouy/Fluentd-OpenSearch-%EB%A1%9C%EA%B7%B8-%EB%AA%A8%EB%8B%88%ED%84%B0%EB%A7%81-%EC%8B%9C%EC%8A%A4%ED%85%9C-%EA%B5%AC%EC%B6%95%EA%B8%B0
YAML
https://github.com/fluent/fluentd-kubernetes-daemonset/blob/master/fluentd-daemonset-opensearch.yaml
https://github.com/fluent/fluentd-kubernetes-daemonset/tree/master
