run generate openvpn key gives the key file 600 permissions with root:vyattacfg as the owner, but OpenVPN can't read such files.
# run show log openvpn Sep 12 09:13:40 reki systemd[1]: [email protected]: Failed with result 'exit-code'. Sep 12 09:13:45 reki openvpn-vtun1[3436]: Cipher negotiation is disabled since neither P2MP client nor server mode is enabled Sep 12 09:13:45 reki openvpn-vtun1[3436]: Options error: --secret fails with '/config/auth/sentrium.key': Permission denied (errno=13) Sep 12 09:13:45 reki systemd[1]: [email protected]: Main process exited, code=exited, status=1/FAILURE Sep 12 09:13:45 reki openvpn-vtun1[3436]: Options error: Please correct these errors. Sep 12 09:13:45 reki systemd[1]: [email protected]: Failed with result 'exit-code'. Sep 12 09:13:45 reki openvpn-vtun1[3436]: Use --help for more information. # ls -alh /config/auth/sentrium.key -rw------- 1 root vyattacfg 637 Oct 13 2017 /config/auth/sentrium.key