Filebeat is not able to connect with Elasticsearch 7.10 ( aws Opensearch )

The error message you are seeing indicates that Filebeat is not able to connect to Elasticsearch (in this case, OpenSearch) version 7.10 using the current version of Filebeat (8.6.2). This is because the Elasticsearch version (7.10.2) is older than the Filebeat version and is not supported.

To resolve this issue, you can either upgrade your OpenSearch instance to a version that is compatible with the current version of Filebeat or downgrade Filebeat to a version that is compatible with the Elasticsearch version.

To upgrade OpenSearch, you can follow the steps provided in the OpenSearch documentation. It is recommended to upgrade to the latest version of OpenSearch that is compatible with your version of Filebeat.

To downgrade Filebeat, you can either download an older version of Filebeat that is compatible with your Elasticsearch version or set the output.elasticsearch.allow_older_versions option to true in your Filebeat configuration file. Note that using an older version of Filebeat may result in missing features or security vulnerabilities, so it is recommended to upgrade your Elasticsearch version to a compatible version if possible.

Once you have upgraded or downgraded the appropriate component, you should be able to successfully connect Filebeat to OpenSearch without encountering the compatibility error message.

You might find this info useful to derive the Compatibility matrix - https://opensearch.org/docs/latest/tools/index/.

Ideally you would try either version 7.10.2 , 7.11 or 7.12 of Filebeat OSS.