Elasticsearch site plugins, previously popular for index monitoring and management, became obsolete with the release of Elasticsearch version 5 due to security concerns related to serving static web content. Despite this, some plugins have workarounds and can still be used with extra configuration for monitoring and administration of Elasticsearch clusters and indices. There is no official documentation listing compatible community plugins for version 5, but alternatives like Kibana or integrating Elasticsearch with Graphite and Prometheus, paired with Grafana for visualization, offer viable monitoring solutions. While some plugins like Kopf and Cerebro support version 5 to varying degrees, others like ElasticHQ and BigDesk are either not fully compatible or inactive.