Bug 2182769

Summary:	[RFE] Implement support for "NIC name pinning"
Product:	Red Hat Enterprise Linux 9	Reporter:	Colin Walters <walters>
Component:	nmstate	Assignee:	Gris Ge <fge>
Status:	VERIFIED ---	QA Contact:	Mingyu Shi <mshi>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	9.2	CC:	ferferna, jiji, jishi, network-qe, pamoedom, sfaye, till
Target Milestone:	rc	Keywords:	FutureFeature, Triaged
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	nmstate-2.2.10-2.el9	Doc Type:	No Doc Update
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	Feature Request
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Colin Walters 2023-03-29 15:02:19 UTC

Current discussion around https://issues.redhat.com/browse/OCPBUGS-10787 is leaning to shipping at least PoC code in nmstate.

Something of the form:

nmstatectl pin-nic-names 

Possibly with options like --active-only (or --ignore-inactive) or `--include-only-glob=enp*` etc.

Filing this to track work on this from the nmstate side.

Comment 3 Gris Ge 2023-04-11 12:58:11 UTC

Patch send to upstream: https://github.com/nmstate/nmstate/pull/2306

The whole workflow:

 * Use `nmstatectl persist-nic-names` to pin __every__ ethernet interface to its
   MAC via systemd .link file.
 * After boot into new environment, `nmstatectl persist-nic-names --cleanup`
   will remove un-required systemd .link file.

Key tech point:

    Use `udevadm test-builtin net_id /sys/class/net/<iface_name>` to check
    systemd preferred interface name and compare to current interface
    name.

Tested:
 * CentOS stream 9 VM by renaming a existing interface to new name.

 * RHEL 8.8 and CentOS stream 9 on Mellanox MT27710:
    * Not from upgrade, just reinstall CentOS stream 9 and restored the
      nmstate created .link files.