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criteo / cassandra_exporter

Apache Cassandra® metrics exporter for Prometheus
Apache License 2.0
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Nodes up/down status #57

Closed hadarizi closed 5 years ago

hadarizi commented 5 years ago

Hi, I couldn't find any metric which gives the node status. The closest metric is using "up" but this only indicates if the exporter is up/down.

erebe commented 5 years ago

Hello, There is no good way to monitor if a node is available or not trough jmx/cassandra exporter. As you may be able to retrieve metrics from cassandra but the node may still be unresponsive to request.

To measure avaibility of our cluster we use https://github.com/criteo/casspoke, which is an external probe that send request to every node on the system keyspace. So far it works well for us and is able to detect when a node is un-healthy