Teal96TA

Ok, lately when I push the brake pedal, the calipers make a creaking sound. What would make this happen? Also, this might be related, but I notice some oily mess below the brake equipment under the hood. Followed it upwards and found what appears to be a hariline crack in the side of the part that has LF, RR, LR, and RF on top. The crack is right above the point where it kind "bulges" (<---lack of better term) outward. Should epoxy be able to hold this for a month or 2 or no? Thanks for any input!