NIS switching to new libnsl to support IPv6
Summary
This system-wide change covers the switch of NIS components to the new client side implementation in order to support IPv6, while detaching libnsl and nss_nis packages, previously bundled together with glibc.
Owner
- Name: Matej Muzila
- Email: mmuzila@redhat.com
- Name: Honza Horak
- Email: hhorak@redhat.com
- Release notes owner:
Current status
- Targeted release: Fedora 28
- Last updated: 2018-01-09
- Tracker bug: <will be assigned by the Wrangler>
Detailed Description
glibc bundles the client part of NIS, while this implementation is not compatible with IPv6, due to the way addresses are represented. NIS upstream added NIS support for the server and client tools, but for being able to use this feature, the libnsl and nss_nis needs to be rebased to the new version. Since NIS has been part of glibc for long time and it doesn't seem to be necessary (especially given the NIS is an obsoleted technology for years), it is better to detach those two packages and deliver them as a separate library.
This change is also related to Sun RPC Removal Change.
Benefit to Fedora
After switching to libnsl2, applications using the NIS will support IPv6.
NIS support in glibc have been deprecated for a long time and is explicitly enabled in the Fedora build. This change aligns Fedora glibc with current upstream owners.
Scope
- Proposal owners: Provide the NIS client implementation as separate packages, and adjust the glibc packaging to remove the
nss_nissubpackage, the NIS header files, and movelibnslto a new subpackage. - Other developers:
- Packages which used to depend on the
libnsllibrary from glibc will need to addBuildRequires: libnsl2-devel.
- Packages which used to depend on the
- Release engineering: #7256 (a check of an impact with Release Engineering is needed)
- Policies and guidelines: N/A (not needed for this Change; covered by the existing Packaging Guidelines)
- Trademark approval: N/A (not needed for this Change)
Upgrade/compatibility impact
Support for existing binaries is preserved.
How To Test
Regular system testing on IPv4 and IPv6 networks will cover this change.
User Experience
Users will enjoy IPv6 support.
Dependencies
This change is also related to Sun RPC Removal Change.
Contingency Plan
- Contingency mechanism: Revert the glibc changes and reintroduce the deprecated interfaces.
- Contingency deadline: alpha
- Blocks release? no
- Blocks product? N/A
Documentation
Release Notes
Fedora 28 uses new libnsl to support IPv6 for NIS functionality.