Bug 1660179
| Summary: | rhel-guest-image using Predictable Device Names rather than eth | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 8 | Reporter: | Robert Locke <rlocke> |
| Component: | rhel-guest-image | Assignee: | Mohammed Gamal <mmorsy> |
| Status: | CLOSED CURRENTRELEASE | QA Contact: | Wei Shi <wshi> |
| Severity: | unspecified | Docs Contact: | |
| Priority: | medium | ||
| Version: | 8.0 | CC: | ftaylor, jgreguske, jwboyer, linl, ribarry, wshi |
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | If docs needed, set a value | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2019-07-09 10:46:17 UTC | Type: | Bug |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | 1643347 | ||
| Bug Blocks: | |||
FYI, I would also be happy if we adopted shifting to using prefixdevname with RHEL8. Change the above lines to be: # adjust existing BLS entries sed -i -e 's/^\(kernelopts=.*\)/\1 no_timer_check net.ifnames.prefix=net/' /boot/grub2/grubenv # make grub changes persistent sed -i -e 's/^\(GRUB_CMDLINE_LINUX=.*\)"/\1 no_timer_check net.ifnames.prefix=net"/' /etc/default/grub This is different in the Snapshot 6 qcow2 made available where the net.ifnames=0 has been fully implemented for both initial boot and subsequent kernel updates. The shift to net.ifnames.prefix=net had further complications, so I am glad we are not going that direction at this point. Presuming the net.ifnames=0 persists to GA, I think this bug can be closed based on the work accomplished in https://bugzilla.redhat.com/show_bug.cgi?id=1643347 Closing this as the requested change is already implemented. We should consider removing net.ifnames=0 altogether in the future. See BZ#1660122 |
Description of problem: The updating of Grub2 according to /root/anaconda-ks.cfg to use net.ifnames did not take effect for the initial kernel. Version-Release number of selected component (if applicable): 8.0 Beta and 8.0 Beta Snapshot 2 How reproducible: Every time Steps to Reproduce: 1. Boot the VM on top of RHEL 8 host 2. Inside the VM, the 2 VirtIO NICs will have names of ens3 and ens4 Actual results: The NICs are using the newer "Predictable Network Interface Device Names" which is helpful in physical environments, but less so in virtual environments. Expected results: Continue the eth0 style naming as used in RHEL 7.x Additional info: This is related to the shift in RHEL 8 to use BLS (Boot Loader Spec). The following three lines are affected in anaconda-ks.cfg: # reorder console entries sed -i 's/console=tty0/console=tty0 console=ttyS0,115200n8/' /boot/grub2/grub.cfg # add additional flags for the running image sed -i -e 's/115200n8/115200n8 no_timer_check net.ifnames=0/' /boot/grub2/grub.cfg # make grub changes persistent sed -i -e 's/^\{GRUB_CMDLINE_LINUX=.*\}"/\1 no_timer_check net.ifnames=0 console=ttyS0m115200n8"/' /etc/default/grub It is the first two sed's that are having no effect because they need to edit the /boot/grub2/grubenv file and the kernelopts line to update the "existing" BLS entries. In fact, I *think* a line like: # adjust existing BLS entries sed -i -e 's/^\{kernelopts=.*\}/\1 no_timer_check net.ifnames=0 console=ttyS0m115200n8/' /boot/grub2/grubenv I'll do some testing to see if that last line helps/works for me.