The 32-bit version of CentOS 7 (1708) for i386 has been released

This is the release announcement for the i386 (Intel 32-bit)
Architecture based on the source code released for CentOS-7 (1708). It
includes all packages that build on x86 32-bit processors.

The release notes for the normal CentOS-7 apply:

https://wiki.centos.org/Manuals/ReleaseNotes/CentOS7

with the following notes that are specific to i386:

https://wiki.centos.org/SpecialInterestGroup/AltArch/i386

If you already have a previous version of CentOS-7 i386 installed, just
running 'yum update' will get you the latest packages installed.

ISOs can be downloaded from:

http://mirror.centos.org/altarch/7/isos/i386/

Here are the SHA256SUMS for the ISOs:

CentOS-7-i386-DVD-1708.iso:
36df0a7d687e058ec11708ccace7981fe2faf1040d4efd796a4ffab67863eace

CentOS-7-i386-Everything-1708.iso
e118987646ca5e916a1cdc89e916ea64bd06e1c09564721a13ad90b0caffd4b2

CentOS-7-i386-LiveGNOME-1708.iso:
e97c5475e5a45539a213970d13231c3da85927c8d5f34f7fc187fd37cdfe72aa

CentOS-7-i386-LiveKDE-1708.iso:
7c2130993783c089453d6f55aea2431c9c7617be922e2b206bcef03580c521f7

CentOS-7-i386-Minimal-1708.iso:
8e73904c870f93ca3b553048a0092b1fc0ddebd2d8990e0f7b13a22d70eb725e

CentOS-7-i386-NetInstall-1708.iso:
5fd4075b841e8500826408ef95352ed1d2868b2ebe2cdcf66cd505a51a6c8484

===========================

Bug reports and feedback about specific packages should be filed at
https://bugs.centos.org/ against the relevant package name, for project
CentOS Linux 7, in the same manner as you would for x86_64. However, do
mention the architecture as applicable.