Chapter 8: Watcher
- Previously a plug-in for ElasticSrearch
- Now installed as part of X-Pack
- Encourages integration and automation for a wide range of use-cases:
- Monitor your infrastructure
- Track network activity
- Monitor health of ElasticSearch cluster/node/index
- Gives you the power of the Elasticsearch DSL to identify changes in your data
- Create notifications when:
- The same user logins from 4 disperse geographical locations in 10 min
- Frequency of request for a single ip address spikes 1,000% in last hour
- Elastic Search cluster is experiencing increased exceptions rate in the logs