title: Should I use Prometheus as a log aggregator?
body: <p>Can/should prometheus be used as a log aggregator? We are deploying apps into a kubernetes cluster. All containers already log to stdout/err and we want all devs to instrument their code with logs to stdout/err. Fluentd will then collate all logs across the whole cluster and send to an aggregator. We have thought about using Elasticsearch/kibana however we will already have Prometheus for node metric gathering so if we can have fluentd send all logs to Prometheus it keeps everything in one place. </p>
  
  <p>So, can/should Prometheus be used as a logging aggregator? Would it still have to poll the fluentd server? Really, it would be great to be able to use the alerting features of Prometheus so that if a certain log is made it (for instance) dumps the log message into a slack channel etc.</p>
  
  <p>Appreciate some pointers on this one, thanks. </p>