Syslog pipeline => [host] error in ElasticSearch

Elastic Stack Logstash
3

Precision: I'm using "classic" rsyslog to forward syslogs to logstash server on port 5514

I hope this is what you want, I got it from stdout ouput:

 {
    "@version" => "1",
    "message" => "<11>Jan 29 16:17:56 my-server setroubleshoot: SELinux is preventing ... etc.",
    "host" => "my-server.example.com",
    "@timestamp" => 2021-01-29T15:17:56.229Z,
    "port" => 53280
 }