Node_exporter and grsecurity

hi !

i use node_exporter but on my server i have grsecurity for kernel , and i create a specific user for node_exporter but this user can’t access on /proc /sys for metrics. I can’t use an other kernel (other reason).
i want use exporter_exporter (public ip with this user) in front of node_exporter ( localhost on root).
exporter_exporter is a proxy for exporter prometheus.

have you an other idea to for this ?
is there a issue of security with this proposition ?