Hi,
I just moved v11 RPMs to yum-archive.postgresql.org . If you still need
v11 repos, please read the instructions here:
https://yum.postgresql.org/repopackages/#pgredhatoldrepos
Thanks!
Regards,
--
Devrim Gündüz
Open Source Solution Architect, PostgreSQL Major Contributor
Twitter: @DevrimGunduz , @DevrimGunduzTR