I was trying to connect my logstash forwarder with multiple Logstash servers but I can't figure out how to have a single certificate for all the servers. I am able to connect to each of them individually and I have different certificates for each of them.
The details in /etc/logstash-forwarder.conf are:
"servers": ["123.123.123.123:5000","456.456.456.456:5000"]
"ssl ca": "/etc/pki/tls/certs/logstash-forwarder.crt"
You can generate a certificate for *.yourdomain as described in logstash-forwarder docs.
Your config should be something like this:
"servers": ["server1.yourdomain:5000", "server2.yourdomain:5000"]