Sleep

I have a 8 month old who always wakes up at night. Most of the time it's just once but sometimes it's more. When he was little he would sleep all night with maybe a day or two of waking up. I tried feeding him before bed, not letting him nap in the afternoon but it never fails he wakes up. Is he ever going to sleep all night? Is there something I'm not trying to get him to sleep all night?