Centralized logging in swarm

• ElasticSearch established itself as one of the best databases for real-time search and analytics. It is distributed, scalable, highly available, and provides a sophisticated API.
• LogStash allows us to centralize data processing. It can be easily extended to custom data formats and offers a lot of plugins that can fulfill almost any need. Finally
• Kibana is an analytics and visualization platform with intuitive interface sitting on top of ElasticSearch.
• logstash

Logstash:

LogSpout is a log router for Docker containers that runs inside Docker. It attaches to all containers on a host, then routes their logs wherever we want. It also has an extensible module system. It's a mostly stateless log appliance. It's not meant for managing log files or looking at history. It is just a tool to get your logs out to live somewhere else, where they belong.