We've used Grafana with Sematext Logsene (which exposes Elasticsearch API, so it's like having Grafana talk to ES).

Here's a short howto + video: https://sematext.com/blog/2015/12/14/using-grafana-with-elas...

You can use ElasticSearch as an annotation provider over the top of your time series metrics. We publish events from our continuous deployment pipeline into ES and then surface those in a generic application dashboard. There hasn't been a deployment that we didn't already know about, but in theory when more users are going through CD it will provide more of a heads up.

You can use Graylog for log management, that's the free open-source solution. (graylog + elasticsearch + mongodb)

You can use Splunk if you have money. That's the de facto standard. Beware that it's one of the most expensive software license on the planet :D