Finally, I was able to solve my problem :
- I installed a Ubuntu Desktop VM on which I downloaded Logstash OSS with output-opensearch plugin embedded
- I used the following command to export the plugin :
bin/logstash-plugin prepare-offline-pack --output logstash-output-opensearch.zip --overwrite logstash-output-opensearch
- I installed the plugin on a Windows Logstash OSS 8.6.1 :
bin/logstash-plugin install file:///d:/BINAIRES/logstash-output-opensearch.zip
I described the process here
A small gift : the link to the plugin, in case someone needs it : here
Best regards,