[root@server ~]# systemctl status varnish.service -l
? varnish.service - Varnish Cache, a high-performance HTTP accelerator
Loaded: loaded (/usr/lib/systemd/system/varnish.service; enabled; vendor preset: disabled)
Active: failed (Result: exit-code) since Tue 2017-08-22 09:54:30 UTC; 19s ago
Process: 19646 ExecStart=/usr/sbin/varnishd -P /var/run/varnish.pid -f $VARNISH_VCL_CONF -a ${VARNISH_LISTEN_ADDRESS}:${VARNISH_LISTEN_PORT} -T ${VARNISH_ADMIN_LISTEN_ADDRESS}:${VARNISH_ADMIN_LISTEN_PORT} -S $VARNISH_SECRET_FILE -s $VARNISH_STORAGE $DAEMON_OPTS (code=exited, status=255)
Aug 22 09:54:30 server.mydomain.eu varnishd[19646]: on the first line of the VCL files.
Aug 22 09:54:30 server.mydoman.eu varnishd[19646]: ('/etc/varnish/default.vcl' Line 1 Pos 1)
Aug 22 09:54:30 server.mydomain.eu varnishd[19646]: backend default {
Aug 22 09:54:30 server.mydomain.eu varnishd[19646]: #######----------
Aug 22 09:54:30 server.mydomain.eu varnishd[19646]: Running VCC-compiler failed, exited with 2
Aug 22 09:54:30 server.mydomain.eu varnishd[19646]: VCL compilation failed
Aug 22 09:54:30 server.mydomain.eu systemd[1]: varnish.service: control process exited, code=exited status=255
Aug 22 09:54:30 server.mydomain.eu systemd[1]: Failed to start Varnish Cache, a high-performance HTTP accelerator.
Aug 22 09:54:30 server.mydomain.eu systemd[1]: Unit varnish.service entered failed state.
Aug 22 09:54:30 server.mydomain.eu systemd[1]: varnish.service failed.
[root@server ~]#
this is not upgrade i installed new server by default its installed 5.13 with kloxo 7