Bug 2024169
| Summary: | [Regression] Network installation crashes 60% of the time due to not finding /dev/root | ||||||||
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| Product: | Red Hat Enterprise Linux 8 | Reporter: | Renaud Métrich <rmetrich> | ||||||
| Component: | anaconda | Assignee: | Anaconda Maintenance Team <anaconda-maint-list> | ||||||
| Status: | CLOSED WORKSFORME | QA Contact: | Release Test Team <release-test-team-automation> | ||||||
| Severity: | high | Docs Contact: | |||||||
| Priority: | high | ||||||||
| Version: | 8.5 | CC: | jstodola | ||||||
| Target Milestone: | rc | ||||||||
| Target Release: | --- | ||||||||
| Hardware: | All | ||||||||
| OS: | Linux | ||||||||
| Whiteboard: | |||||||||
| Fixed In Version: | Doc Type: | If docs needed, set a value | |||||||
| Doc Text: | Story Points: | --- | |||||||
| Clone Of: | Environment: | ||||||||
| Last Closed: | 2021-11-18 09:19:06 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: | |||||||||
| Attachments: |
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Created attachment 1842344 [details]
rd.debug output of a failing boot
Can you please try increasing the memory to 2.5 or 3 GB? Does it solve the problem? 3 GiB of memory is the recommended minimum when installing from an http source: https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/performing_a_standard_rhel_installation/system-requirements-reference_installing-rhel#check-disk-and-memory-requirements_system-requirements-reference Indeed, my bad, I wasn't aware so much memory was needed, and it seems to inflate with minor RHEL8 releases. I executed 20 runs with 3GB and all seems fine. |
Created attachment 1842343 [details] Screenshot showing the crash Description of problem: Trying to automatically install a QEMU/KVM over the network (PXE+HTTP) with RHEL8.5, I see that 60% of the time the switchroot to stage2 fails due to not having the /dev/root device. In the rd.debug log (see attached), I can see that /dev/loop2 which is the "dmsetup overlay" has EXT4 errors: [ 28.178773] loop: Write error at byte offset 29511680, length 4096. [ 28.179856] loop: Write error at byte offset 29515776, length 4096. [ 28.181013] loop: Write error at byte offset 29519872, length 4096. [ 28.182207] loop: Write error at byte offset 29523968, length 4096. [ 28.184361] blk_update_request: I/O error, dev loop2, sector 57640 op 0x1:(WRITE) flags 0x800 phys_seg 1 prio class 0 [ 28.185819] blk_update_request: I/O error, dev loop2, sector 57648 op 0x1:(WRITE) flags 0x800 phys_seg 1 prio class 0 [ 28.187940] blk_update_request: I/O error, dev loop2, sector 57656 op 0x1:(WRITE) flags 0x800 phys_seg 1 prio class 0 [ 28.189591] blk_update_request: I/O error, dev loop2, sector 57664 op 0x1:(WRITE) flags 0x800 phys_seg 1 prio class 0 ... Switchroot to /dev/loop2 then fails and we get the emergency prompt: Warning: /dev/root does not exist Entering emergency mode. Exit the shell to continue. ... This is new with RHEL8.5. I started 20 times the installation of the same system with RHEL8.4 and this was always a success. With RHEL8.5, the failure happened ~60% of the time (runs 1, 2, 3, 4 and 7 were a success, all other failed similarly). Version-Release number of selected component (if applicable): RHEL8.5 DVD How reproducible: Very easily on my QEMU/KVM (BIOS mode) Steps to Reproduce: 1. Boot over PXE Actual results: Crash as Switch Root to stage2 Expected results: No crash