The pool draws took place on Thursday morning
Munster will meet Racing 92 and Leicester Tigers once again in the pool stage of the Champions Cup next season.
The draw, which took place on Thursday morning, also saw Leinster and Ulster discover their faith regarding pool opposition for next season's campaign.
Munster were placed into tier 1 before the draw which meant they avoided last year's finalists Clermont and English Premiership side, Wasps.
They will face French side Castres as well as Racing and Leicester in Pool 4.
In Pool 3, Leinster will take on Exeter Chiefs, Montpellier and Glasgow.
Pool 1 sees Wasps, Harlequins and last season's Top 14 table-toppers La Rochelle battle it out with Ulster.
In the Challenge Cup, Connacht have been drawn alongside Donncha O'Callaghan's Worcester Warriors, Brive and Oyonnax.