receiver-only: need s3 write permissions ?

[aderumier]

Hi,
I'm trying to build a 1master - multiple read only slaves setup,

for security reasons, I would like to set the s3 access to readonly on the slaves nodes,but it don't seem to work,
I got a "access denied".

Setting write permissions is working, as they are creating shards on the s3
Is is expected for receiver only nodes ?