This was WADA's decision to ban Russia from next 4 years in world competitions. We still need to wait and see how IOC and FIVB to react. There's a chance that IOC or FIVB not totally accept all the decisions made by WADA, maybe IOC or FIVB will accept part of the decisions.
To me, I think it's not fair to ban the whole countries. If WADA has strong proof that some datas were manipulated, they surely can trace back to certain players. Why they have to ban the whole countries? Not fair to others who are clean.
Maybe it is because the doping programme was supposedly government-funded.