Configuration checking

[krizhanovsky]

There is prerequisite requirements Wiki https://github.com/tempesta-tech/tempesta/wiki/Requirements . However, it's not easy to check whether some requirements are met. For example, it's quite hard to learn whether a particular Intel CPU supports vAPIC or whether a NIC supports SR-IOV.

We need a script which allows users to easily get an idea whether Tempesta FW can be run in a particular environment and whether it can deliver good performance. #1415 is an example of haw hard it could be to figure out why Tempesta FW doesn't deliver enough performance on a poor hardware.

The script must be called from https://github.com/tempesta-tech/tempesta/blob/master/pkg/scripts/tempesta_installer.sh .

/scripts/check_conf.pl at the moment checks vAPIC only. It must be extended to:

• accept program arguments like --virt and --hw to run checks for virtual or bare metal installation
• check for availability of multiple queues on a NIC
• in case of virtual environment check that the NIC is in SR-IOV or macvtap mode
• run all the checks from the prerequisite Wiki
• print errors if an environment can not be used for Tempesta FW and warnings if the environment lacks performance crucial features