I am configuring the fluent bit connection with elasticsearch, I have 3 elasticsearch nodes and I want to have high availability, according to the following documentation it is done like this text, but it is not connecting.
version: fluent-bit:2.1
error in the log is the following [2023/10/06 16:11:06] [ warn] [engine] failed to flush chunk '1-1696602761.424989.flb', retry in 1007 seconds: task_id=401, input=tail.0 > output=es.0 (out_id=0) [2023/10/06 16:11:06] [ warn] [net] getaddrinfo(host='forward-balancing', err=11): Could not contact DNS servers [2023/10/06 16:11:06] [ warn] [engine] failed to flush chunk '1-1696603081.377993729.flb', retry in 1935 seconds: task_id=482, input=tail.0 > output=es.0 (out_id=0) [2023/10/06 16:11:07] [ warn] [net] getaddrinfo(host='forward-balancing', err=11): Could not contact DNS servers
fluent-bit.conf: | [UPSTREAM] name forward-balancing [NODE] name node-1 host server1 Port 9200 [NODE] name node-2 host server2 Port 9200 [NODE] name node-3 host server3 Port 9200 [SERVICE] Flush 1 Log_Level info Daemon off Parsers_File parsers.conf HTTP_Server On HTTP_Listen 0.0.0.0 HTTP_Port 2020 [INPUT] Name tail Tag kube.* Path /var/log/containers/*.log Parser json DB /var/log/flb_kube.db Mem_Buf_Limit 5MB Skip_Long_Lines On Refresh_Interval 10 [OUTPUT] Name es Match * Index index-v1 Host forward-balancing Port 9200 HTTP_User user HTTP_Passwd password Logstash_Format Off Type _doc Replace_Dots On Retry_Limit False tls On tls.verify Off Suppress_Type_Name On 
