follow recommendations of all these vendors how to backup their data. I guess they all will have some native "dump" backup, e.g. backup of important files to disk (under some quiesced state of their systems), these files can be then ovettaken by NetBackup as common files.
Looks like you can do a file system type backup of Elastic Search. According to Elastic Search, they have the ability to take snapshots of an entire cluster, or indices and store this on a shared filesystem. With additional plugins, the snapshots can also be stored in various cloud providers storage. See this link:
So a filesystem back is completely possible. Take an Elastic Search snapshot. Store that on a shared filesystem which is on a system that has the NetBackup client installed. Do a regular filesystem backup.
As Michal pointed out, you will need to do some research of your own for each vendor. I've never used Elastic Search, but managed to figure that one out in a couple of minutes. All I did was a google search for "elastic search backup" and had a look at a couple of the links from Elastic. Start with looking at the vendors links first as they will know the correct way to backup and restore their own products.
Hope this helps,