Enable fstrim automatically on cinder thin lvm provisioning

I deployed openstack using kolla ansible, and used LVM as storage backend for my cinder service, however I noticed that the lvm thin pool size keeps increasing even though the space used by instances volumes is the same, and after a bit of investigating I found out that I had to enable fstrim because the data deleted inside the logical volumes was still allocated from the thin pool perspective and I had to do fstrim on those volumes, how can I enable this automatically in openstack?