Docker-compose links vs external_links
问题 I believe it is simple question but I still do not get it from Docker-compose documentations. What is the difference between links and external_links? I like external_links as I want to have core docker-compose and I want to extend it without overriding the core links. What exactly I have, I am trying to setup logstash which depends on the elasticsearch. Elasticsearch is in the core docker-compose and the logstash is in the depending one. So I had to define the elastic search in the depended