How to send data to Elastic Cloud with On-Premise Logstash

Java HotSpot(TM) 64-Bit Server VM warning: Ignoring option UseConcMarkSweepGC; support was removed in 14.0
Java HotSpot(TM) 64-Bit Server VM warning: Ignoring option CMSInitiatingOccupancyFraction; support was removed in 14.0
Java HotSpot(TM) 64-Bit Server VM warning: Ignoring option UseCMSInitiatingOccupancyOnly; support was removed in 14.0
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.headius.backport9.modules.Modules (file:/root/logstash-7.6.2/logstash-core/lib/jars/jruby-complete-9.2.9.0.jar) to method sun.nio.ch.NativeThread.signal(long)
WARNING: Please consider reporting this to the maintainers of com.headius.backport9.modules.Modules
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Sending Logstash logs to /root/logstash-7.6.2/logs which is now configured via log4j2.properties
[2020-04-17T08:58:32,336][WARN ][logstash.config.source.multilocal] Ignoring the 'pipelines.yml' file because modules or command line options are specified
[2020-04-17T08:58:32,470][INFO ][logstash.runner          ] Starting Logstash {"logstash.version"=>"7.6.2"}
[2020-04-17T08:58:34,506][INFO ][org.reflections.Reflections] Reflections took 49 ms to scan 1 urls, producing 20 keys and 40 values
[2020-04-17T08:58:35,610][INFO ][logstash.outputs.elasticsearch][main] Elasticsearch pool URLs updated {:changes=>{:removed=>[], :added=>[https://elastic:xxxxxx@a77aaf4882664376b700d79c0fa670c6.ap-southeast-1.aws.found.io:9243/]}}
[2020-04-17T08:58:36,529][WARN ][logstash.outputs.elasticsearch][main] Restored connection to ES instance {:url=>"https://elastic:xxxxxx@a77aaf4882664376b700d79c0fa670c6.ap-southeast-1.aws.found.io:9243/"}
[2020-04-17T08:58:37,026][INFO ][logstash.outputs.elasticsearch][main] ES Output version determined {:es_version=>7}
[2020-04-17T08:58:37,032][WARN ][logstash.outputs.elasticsearch][main] Detected a 6.x and above cluster: the `type` event field won't be used to determine the document _type {:es_version=>7}
[2020-04-17T08:58:37,259][INFO ][logstash.outputs.elasticsearch][main] New Elasticsearch output {:class=>"LogStash::Outputs::ElasticSearch", :hosts=>["https://a77aaf4882664376b700d79c0fa670c6.ap-southeast-1.aws.found.io:9243/"]}
[2020-04-17T08:58:37,350][WARN ][org.logstash.instrument.metrics.gauge.LazyDelegatingGauge][main] A gauge metric of an unknown type (org.jruby.RubyArray) has been created for key: cluster_uuids. This may result in invalid serialization.  It is recommended to log an issue to the responsible developer/development team.
[2020-04-17T08:58:37,360][INFO ][logstash.javapipeline    ][main] Starting pipeline {:pipeline_id=>"main", "pipeline.workers"=>2, "pipeline.batch.size"=>125, "pipeline.batch.delay"=>50, "pipeline.max_inflight"=>250, "pipeline.sources"=>["/root/logstash-7.6.2/config/test.conf"], :thread=>"#<Thread:0x10bc354f run>"}
[2020-04-17T08:58:37,471][INFO ][logstash.outputs.elasticsearch][main] Using default mapping template
[2020-04-17T08:58:37,756][INFO ][logstash.outputs.elasticsearch][main] Attempting to install template {:manage_template=>{"index_patterns"=>"logstash-*", "version"=>60001, "settings"=>{"index.refresh_interval"=>"5s", "number_of_shards"=>1}, "mappings"=>{"dynamic_templates"=>[{"message_field"=>{"path_match"=>"message", "match_mapping_type"=>"string", "mapping"=>{"type"=>"text", "norms"=>false}}}, {"string_fields"=>{"match"=>"*", "match_mapping_type"=>"string", "mapping"=>{"type"=>"text", "norms"=>false, "fields"=>{"keyword"=>{"type"=>"keyword", "ignore_above"=>256}}}}}], "properties"=>{"@timestamp"=>{"type"=>"date"}, "@version"=>{"type"=>"keyword"}, "geoip"=>{"dynamic"=>true, "properties"=>{"ip"=>{"type"=>"ip"}, "location"=>{"type"=>"geo_point"}, "latitude"=>{"type"=>"half_float"}, "longitude"=>{"type"=>"half_float"}}}}}}}
[2020-04-17T08:58:38,763][INFO ][logstash.javapipeline    ][main] Pipeline started {"pipeline.id"=>"main"}
[2020-04-17T08:58:38,839][INFO ][logstash.agent           ] Pipelines running {:count=>1, :running_pipelines=>[:main], :non_running_pipelines=>[]}
[2020-04-17T08:58:38,867][INFO ][filewatch.observingtail  ][main] START, creating Discoverer, Watch with file and sincedb collections
[2020-04-17T08:58:39,163][INFO ][logstash.agent           ] Successfully started Logstash API endpoint {:port=>9600}