I could not find any public documentation stating recommended resources for my kibana, elastic and logstash. What would the resource guide be if i had 100GB/day logs ?
I recommend this (somewhat old) reference article, since Elasticsearch use cases vary too much (query patterns, mappings, complexity, retention, etc.) for anyone to publish one exact sizing guide.
Link : Benchmarking and sizing your Elasticsearch cluster for logs and metrics | Elastic Blog