grafana-pcp:
sudo semanage fcontext -a -t httpd_sys_content_t "/usr/libexec/grafana-pcp(/.*)?"
sudo restorecon -Rv /usr/libexec/grafana-pcp

general:
sudo restorecon -RvF /usr/sbin/grafana-* \
/etc/grafana \
/var/log/grafana \
/var/lib/grafana \
/usr/share/grafana