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
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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.
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Johnny Hughes Twitter: @JohnnyCentOS Freenode IRC: hughesjr