When I'm exploring the data dir of elasticsearch node, I found that there are some dirs in 'data/nodes/0/indices', say 'foo' and 'bar'. Are these dirs right my actual indices in cluster(foo and bar) correspondingly?
Actually I'm thinking to encrypt data on disk with index level. For example, encrypt index foo with key_foo and encrypt index bar with key_bar. If answer to the dir question is yes, then I can just encrypt the index data file with specific key.
Or any other ways to do index level at rest encryption?