Able to solve this issue by making the below change to output.
output {
elasticsearch {
hosts => ["https://node1.elasticsearch.com:9200", "https://node2.elasticsearch.com:9200", "https://node3.elasticsearch.com:9200"]
user => "logstash_writer"
password => "changeme"
ssl_certificate_verification => false
cacert => "/opt/elk/logstash-7.12.0/config/elasticsearch-ca.pem"
}
stdout { codec => rubydebug }
}
I included ssl_certificate_verification => false to solve the issue, but without that, it is impossible to go past the error.
Is there any way to solve this issue without disabling certificate verification?