Is there a way to specify multiple cacert files

[qingkunl]

Can we specify multiple cacert files? I have multiple Elasticsearch clusters configured with the same domain name (e.g. es.xxx.com), and use DNS to decide which Elasticsearch cluster to use. So my logstash output setting is like:

elasticsearch {
    hosts => [ "https://es.xxx.com" ]
    cacert => '/path/to/cacert'
    user => "xxx"
    password => "xxx"
    index => "xxx"
}

Since es.xxx.com may be resolved to differentiations Elasticsearch clusters, and each cluster uses its own cacert, I'd like a way to specify multiple cacert files.

I've tried to put all cacert in the same file (like the following), but only the last one is used.

-----BEGIN CERTIFICATE-----
xxxxxxxxxx
xxxxxxxxxx
-----END CERTIFICATE-----
-----BEGIN CERTIFICATE-----
xxxxxxxxxx
xxxxxxxxxx
-----END CERTIFICATE-----