I had a post here recently about upgrading to 4.3 (and decided for wait the documentation to update/improve) and I am aware that I will need to migrate to OpenSearch from ES but first would like to know the correct order (and recommended method of install).
1 - Upgrade to Graylog 4.3 first?
2 - Follow the " Preparing for Migration" located here
3 - Install OpenSearch (I am running Ubuntu with no Docker installed in my system - User tarball for simplicity’s sake?)?
4 - Follow " Installation Prerequisites" located here for Ubuntu?
5 - Follow " Updating the OpenSearch Configuration" since I am using the same ElasticSearch nodes?