Please elaborate on what you’re trying to achieve and post the complete configuration of all relevant components such as the configuration of the inputs in Graylog.
I am trying create index in nxlog.conf, want to push my logs to defined index not with default index,
we have multiple clients depends on index we are going to push logs based on index will search the logs.
Yes, Filebeat (or any log shipper supporting the Beats protocol) can be used with Graylog.
You could manually build the functionality to specify the target index in Filebeat, e. g. by using a custom message field which a pipeline rule in Graylog is using to identify the stream in which a message should be placed.