For log-level monitoring, ELK is currently the most popular, which is the abbreviation of Elasticsearch, Logstash, and Kibana.
Logstash: responsible for log collection and formatting
Elasticsearch: responsible for log search
Kibana: Responsible for displaying logs in the form of graphs
Supervisord is responsible for managing and starting the first three processes
Later, Filebeat was used to replace Logstash to achieve a better log collection effect and form EFK (Filebeat is based on the original logstash-forwarder source code).
At present, the actual combination of Internet companies is the following mode (cluster mode):
问题三：
ERROR: [1] bootstrap checks failed
[1]: the default discovery settings are unsuitable for production use; at least one of [discovery.seed_hosts, discovery.seed_providers, cluster.initial_master_nodes] must be configured
