Error: update failed

[EugenKon]

Description

I am trying to upgrade my CoreOS

$ uname -a
Linux www 4.1.6-coreos-r1 #2 SMP Wed Sep 2 04:16:15 UTC 2015 x86_64 Intel(R) Xeon(R) CPU E5-2686 v4 @ 2.30GHz GenuineIntel GNU/Linux

 $ cat /etc/os-release
NAME=CoreOS
ID=coreos
VERSION=766.3.0
VERSION_ID=766.3.0
BUILD_ID=
PRETTY_NAME="CoreOS 766.3.0"
ANSI_COLOR="1;32"
HOME_URL="https://coreos.com/"
BUG_REPORT_URL="https://github.com/coreos/bugs/issues"

Impact

$ sudo ./flatcar-update --to-version "$VER" --to-payload flatcar_production_update.gz --force-flatcar-key
Bind-mounting /usr/share/update_engine/update-payload-key.pub.pem
Forcing update...
Error: update failed

Environment and steps to reproduce

I follow instruction described here https://www.flatcar.org/docs/latest/migrating-from-coreos/update-from-container-linux/

Expected behavior

Updated CoreOS -> FlatCar

[pothos]

Can you share the output of journalctl -u update-engine --no-pager (the last ~100 lines should be enough)?

[EugenKon]

Sorry, I prepared it, but did not attached.

update.log

[pothos]

Ok, can you first update to an older Flatcar version like 2765.2.6? https://update.release.flatcar-linux.net/amd64-usr/2765.2.6/

[pothos]

Later versions don't provide the kernel anymore in the /usr partition for use with syslinux. I think you can try to migrate the machine by setting BOOT/coreos/vmlinuz-A instead of BOOT/syslinux/vmlinuz.A (same for B) in the boot loader and then remove the cros_legacy kernel parameter, reboot and then attempt the update to the latest version. Since I haven't tried it, it may not work.

[EugenKon]

@pothos We also noticed, that fleetctl was removed from distribution. Are there migration guides available for moving from freelctl to kubernetes?

[jepio]

fleetctl was removed from CoreOS in 2017, before Flatcar was created.

There is no straightforward migration. Depending on your needs you may be happy with systemd units starting docker containers (https://www.flatcar.org/docs/latest/setup/systemd/getting-started/#unit-file) or you may have to search the web for a kubernetes tutorial/guide.

[EugenKon]

@jepio Thanks

[EugenKon]

Found this documentation is useful in migrating from 'cloud-config': https://www.flatcar.org/docs/latest/provisioning/cl-config/from-cloud-config/

[dongsupark]

Thanks for the report.
It would be great to update the systems to newer Flatcar versions and test it again.