Datasets disappear on reboot

[vshnu17]

Hello,
I have installed ZFS(0.6.5) in my Centos 7 and I have also created a zpool, everything works fine apart from the fact that my datasets disappear on reboot.
I have been trying to debug this issue with the help of various online resources and blogs but couldn't get the desired result. After reboot, when I issue the zfs list command I get " no datasets available " , and zpool list gives "no pools available"
After doing a lot of online research, I could make it work by manually importing the cache file using zpool import -c cachefile, but still I had to run zpool set cachefile=/etc/zfs/zpool.cache Pool before the reboot so as to import it later on after reboot.
This is what systemctl status zfs-import-cache looks like,

zfs-import-cache.service - Import ZFS pools by cache file
Loaded: loaded (/usr/lib/systemd/system/zfs-import-cache.service; static)
Active: inactive (dead)

I am not sure if this is a known issue,.. if yes, Is there any workaround for this? perhaps an easy way to preserve my datasets after reboot and preferably without the overhead of an cache file.