sudo ocf-tester -n drbd_res -o drbd_resource="r1"
    /usr/lib/ocf/resource.d/linbit/drbd monitor

Beginning tests for /usr/lib/ocf/resource.d/linbit/drbd...
/usr/sbin/ocf-tester: 226: /usr/sbin/ocf-tester: xmllint: not found
* rc=127: Your agent produces meta-data which does not conform to ra-api-1.dtd
* rc=6: Validation failed.  Did you supply enough options with -o ?
WARNING: You may be disappointed: This RA is intended for pacemaker
1.0 or better!
ERROR: meta parameter misconfigured, expected clone-max -le 2, but found unset.
Aborting tests