We'd like to be able to set a specific kernel version to be able tu update kernel as we want on Scaleway infrastructure.
That would benefit to Eglide.
Description
Description
| Status | Subtype | Assigned | Task | ||
|---|---|---|---|---|---|
| Unknown Object (Maniphest Task) | |||||
| Open | None | T1699 Determine how to boot a custom kernel image on a Scaleway server |
Event Timeline
Comment Actions
I spawned a DEV1-S machine with ubuntu 22.04 in order to make the tests:
Let's check the content of the boot partition and the kernel in use:
root@scw-zen-villani:~ # ll /boot/ total 171065 drwxr-xr-x 4 root root 4096 Sep 22 21:22 ./ drwxr-xr-x 20 root root 4096 Sep 22 21:20 ../ -rw------- 1 root root 6249967 Jun 22 12:42 System.map-5.15.0-41-generic -rw-r--r-- 1 root root 261649 Jun 22 12:42 config-5.15.0-41-generic drwx------ 3 root root 512 Jan 1 1970 efi/ drwxr-xr-x 6 root root 4096 Aug 2 12:44 grub/ lrwxrwxrwx 1 root root 28 Jul 18 02:10 initrd.img -> initrd.img-5.15.0-41-generic -rw-r--r-- 1 root root 31096565 Jul 18 02:11 initrd.img-5.15.0-41-generic lrwxrwxrwx 1 root root 28 Jul 18 02:10 initrd.img.old -> initrd.img-5.15.0-41-generic -rw-r--r-- 1 root root 126457768 Sep 20 10:48 linux-5.15.69.tar.xz lrwxrwxrwx 1 root root 25 Jul 18 02:10 vmlinuz -> vmlinuz-5.15.0-41-generic -rw------- 1 root root 11086240 Jun 22 13:24 vmlinuz-5.15.0-41-generic lrwxrwxrwx 1 root root 25 Jul 18 02:10 vmlinuz.old -> vmlinuz-5.15.0-41-generic root@scw-zen-villani:/boot# uname -r 5.15.0-41-generic
Let’s download and install a latest version of the kernel
root@scw-zen-villani:~# wget https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.19/amd64/linux-headers-5.19.0-051900_5.19.0- root@scw-zen-villani:~# wget https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.19/amd64/linux-headers-5.19.0-051900-generic_5.19.0-051900.202207312230_amd64.deb root@scw-zen-villani:~# wget https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.19/amd64/linux-image-unsigned-5.19.0-051900-generic_5.19.0-051900.202207312230_amd64.deb root@scw-zen-villani:~# wget https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.19/amd64/linux-modules-5.19.0-051900-generic_5.19.0-051900.202207312230_amd64.deb root@scw-zen-villani:~# dpkg -i *deb Selecting previously unselected package linux-headers-5.19.0-051900-generic. (Reading database ... 71272 files and directories currently installed.) Preparing to unpack linux-headers-5.19.0-051900-generic_5.19.0-051900.202207312230_amd64.deb ... Unpacking linux-headers-5.19.0-051900-generic (5.19.0-051900.202207312230) ... Selecting previously unselected package linux-headers-5.19.0-051900. Preparing to unpack linux-headers-5.19.0-051900_5.19.0-051900.202207312230_all.deb ... Unpacking linux-headers-5.19.0-051900 (5.19.0-051900.202207312230) ... Selecting previously unselected package linux-image-unsigned-5.19.0-051900-generic. Preparing to unpack linux-image-unsigned-5.19.0-051900-generic_5.19.0-051900.202207312230_amd64.deb ... Unpacking linux-image-unsigned-5.19.0-051900-generic (5.19.0-051900.202207312230) ... Selecting previously unselected package linux-modules-5.19.0-051900-generic. Preparing to unpack linux-modules-5.19.0-051900-generic_5.19.0-051900.202207312230_amd64.deb ... Unpacking linux-modules-5.19.0-051900-generic (5.19.0-051900.202207312230) ... Setting up linux-headers-5.19.0-051900 (5.19.0-051900.202207312230) ... Setting up linux-headers-5.19.0-051900-generic (5.19.0-051900.202207312230) ... Setting up linux-image-unsigned-5.19.0-051900-generic (5.19.0-051900.202207312230) ... I: /boot/vmlinuz is now a symlink to vmlinuz-5.19.0-051900-generic I: /boot/initrd.img is now a symlink to initrd.img-5.19.0-051900-generic Setting up linux-modules-5.19.0-051900-generic (5.19.0-051900.202207312230) ... Processing triggers for linux-image-unsigned-5.19.0-051900-generic (5.19.0-051900.202207312230) ... /etc/kernel/postinst.d/initramfs-tools: update-initramfs: Generating /boot/initrd.img-5.19.0-051900-generic /etc/kernel/postinst.d/zz-update-grub: Sourcing file `/etc/default/grub' Sourcing file `/etc/default/grub.d/50-cloudimg-settings.cfg' Sourcing file `/etc/default/grub.d/init-select.cfg' Generating grub configuration file ... Found linux image: /boot/vmlinuz-5.19.0-051900-generic Found initrd image: /boot/initrd.img-5.19.0-051900-generic Found linux image: /boot/vmlinuz-5.15.0-41-generic Found initrd image: /boot/initrd.img-5.15.0-41-generic Warning: os-prober will not be executed to detect other bootable partitions. Systems on them will not be added to the GRUB boot configuration. Check GRUB_DISABLE_OS_PROBER documentation entry. Adding boot menu entry for UEFI Firmware Settings ... done
We can notice that it changed the symlinks in boot, as well as the grub configuration:
root@scw-zen-villani:/boot# ll total 257161 drwxr-xr-x 4 root root 4096 Sep 22 21:27 ./ drwxr-xr-x 20 root root 4096 Sep 22 21:20 ../ -rw------- 1 root root 6249967 Jun 22 12:42 System.map-5.15.0-41-generic -rw------- 1 root root 6391505 Jul 31 22:30 System.map-5.19.0-051900-generic -rw-r--r-- 1 root root 261649 Jun 22 12:42 config-5.15.0-41-generic -rw-r--r-- 1 root root 269041 Jul 31 22:30 config-5.19.0-051900-generic drwx------ 3 root root 512 Jan 1 1970 efi/ drwxr-xr-x 6 root root 4096 Sep 22 21:27 grub/ lrwxrwxrwx 1 root root 32 Sep 22 21:26 initrd.img -> initrd.img-5.19.0-051900-generic -rw-r--r-- 1 root root 31096565 Jul 18 02:11 initrd.img-5.15.0-41-generic -rw-r--r-- 1 root root 69646254 Sep 22 21:27 initrd.img-5.19.0-051900-generic lrwxrwxrwx 1 root root 28 Jul 18 02:10 initrd.img.old -> initrd.img-5.15.0-41-generic -rw-r--r-- 1 root root 126457768 Sep 20 10:48 linux-5.15.69.tar.xz lrwxrwxrwx 1 root root 29 Sep 22 21:26 vmlinuz -> vmlinuz-5.19.0-051900-generic -rw------- 1 root root 11086240 Jun 22 13:24 vmlinuz-5.15.0-41-generic -rw------- 1 root root 11848864 Jul 31 22:30 vmlinuz-5.19.0-051900-generic lrwxrwxrwx 1 root root 25 Jul 18 02:10 vmlinuz.old -> vmlinuz-5.15.0-41-generic
Let’s reboot and check if it worked
root@scw-zen-villani:~# reboot root@scw-zen-villani:~# Connection to 212.47.244.42 closed by remote host. Connection to 212.47.244.42 closed. root@scw-zen-villani:~# uname -r 5.19.0-051900-generic
Now, let’s try to rollback to 5.15.0-14-generic. Let’s update the symlinks first.
root@scw-zen-villani:~# linux-update-symlinks upgrade 5.15.0-41-generic /boot/vmlinuz-5.15.0-41-generic root@scw-zen-villani:~# ll /boot total 257161 drwxr-xr-x 4 root root 4096 Sep 22 21:35 ./ drwxr-xr-x 20 root root 4096 Sep 22 21:35 ../ -rw------- 1 root root 6249967 Jun 22 12:42 System.map-5.15.0-41-generic -rw------- 1 root root 6391505 Jul 31 22:30 System.map-5.19.0-051900-generic -rw-r--r-- 1 root root 261649 Jun 22 12:42 config-5.15.0-41-generic -rw-r--r-- 1 root root 269041 Jul 31 22:30 config-5.19.0-051900-generic drwx------ 3 root root 512 Jan 1 1970 efi/ drwxr-xr-x 6 root root 4096 Sep 22 21:27 grub/ lrwxrwxrwx 1 root root 28 Sep 22 21:35 initrd.img -> initrd.img-5.15.0-41-generic -rw-r--r-- 1 root root 31096565 Jul 18 02:11 initrd.img-5.15.0-41-generic -rw-r--r-- 1 root root 69646254 Sep 22 21:27 initrd.img-5.19.0-051900-generic lrwxrwxrwx 1 root root 28 Jul 18 02:10 initrd.img.old -> initrd.img-5.15.0-41-generic -rw-r--r-- 1 root root 126457768 Sep 20 10:48 linux-5.15.69.tar.xz lrwxrwxrwx 1 root root 25 Sep 22 21:35 vmlinuz -> vmlinuz-5.15.0-41-generic -rw------- 1 root root 11086240 Jun 22 13:24 vmlinuz-5.15.0-41-generic -rw------- 1 root root 11848864 Jul 31 22:30 vmlinuz-5.19.0-051900-generic lrwxrwxrwx 1 root root 25 Jul 18 02:10 vmlinuz.old -> vmlinuz-5.15.0-41-generic
By default, grub set latest kernel as the bootable one.
Let’s change it back to 5.15.0-41-generic
root@scw-zen-villani:/boot# vim /boot/grub/grub.cfg
We change this entry
menuentry 'Ubuntu' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-136735fa-5cc1-470f-9359-ee736e42f844' {
recordfail
load_video
gfxmode $linux_gfx_mode
insmod gzio
if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
insmod part_gpt
insmod ext2
search --no-floppy --fs-uuid --set=root 136735fa-5cc1-470f-9359-ee736e42f844
linux /boot/vmlinuz-5.19.0-051900-generic root=UUID=136735fa-5cc1-470f-9359-ee736e42f844 ro swiotlb=262144 console=tty1 console=ttyS0
initrd /boot/initrd.img-5.19.0-051900-generic
}To
menuentry 'Ubuntu' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-136735fa-5cc1-470f-9359-ee736e42f844' {
recordfail
load_video
gfxmode $linux_gfx_mode
insmod gzio
if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
insmod part_gpt
insmod ext2
search --no-floppy --fs-uuid --set=root 136735fa-5cc1-470f-9359-ee736e42f844
linux /boot/vmlinuz-5.15.0-41-generic root=UUID=136735fa-5cc1-470f-9359-ee736e42f844 ro swiotlb=262144 console=tty1 console=ttyS0
initrd /boot/initrd.img-5.15.0-41-generic
}root@scw-zen-villani:/boot# reboot Connection to 212.47.244.42 closed by remote host. Connection to 212.47.244.42 closed. root@scw-zen-villani:~# uname -r 5.15.0-41-generic
Let’s reupdate grub and reboot
root@scw-zen-villani:~# /etc/kernel/postinst.d/zz-update-grub Sourcing file `/etc/default/grub' Sourcing file `/etc/default/grub.d/50-cloudimg-settings.cfg' Sourcing file `/etc/default/grub.d/init-select.cfg' Generating grub configuration file ... Found linux image: /boot/vmlinuz-5.19.0-051900-generic Found initrd image: /boot/initrd.img-5.19.0-051900-generic Found linux image: /boot/vmlinuz-5.15.0-41-generic Found initrd image: /boot/initrd.img-5.15.0-41-generic Warning: os-prober will not be executed to detect other bootable partitions. Systems on them will not be added to the GRUB boot configuration. Check GRUB_DISABLE_OS_PROBER documentation entry. Adding boot menu entry for UEFI Firmware Settings ... done root@scw-zen-villani:~# reboot root@scw-zen-villani:~# uname -r 5.19.0-051900-generic
And in case of hard reboot
root@scw-zen-villani:~# uname -r 5.19.0-051900-generic
Comment Actions
It seems to, on a brand new DEV1-S machine:
root@scw-awesome-hawking:~# uname -r 5.15.0-41-generic root@scw-awesome-hawking:~# ll /boot total 47569 drwxr-xr-x 4 root root 4096 Jul 18 02:11 ./ drwxr-xr-x 20 root root 4096 Sep 23 18:36 ../ -rw------- 1 root root 6249967 Jun 22 12:42 System.map-5.15.0-41-generic -rw-r--r-- 1 root root 261649 Jun 22 12:42 config-5.15.0-41-generic drwx------ 3 root root 512 Jan 1 1970 efi/ drwxr-xr-x 6 root root 4096 Aug 2 12:44 grub/ lrwxrwxrwx 1 root root 28 Jul 18 02:10 initrd.img -> initrd.img-5.15.0-41-generic -rw-r--r-- 1 root root 31096565 Jul 18 02:11 initrd.img-5.15.0-41-generic lrwxrwxrwx 1 root root 28 Jul 18 02:10 initrd.img.old -> initrd.img-5.15.0-41-generic lrwxrwxrwx 1 root root 25 Jul 18 02:10 vmlinuz -> vmlinuz-5.15.0-41-generic -rw------- 1 root root 11086240 Jun 22 13:24 vmlinuz-5.15.0-41-generic lrwxrwxrwx 1 root root 25 Jul 18 02:10 vmlinuz.old -> vmlinuz-5.15.0-41-generic root@scw-awesome-hawking:~# dpkg -i *deb Selecting previously unselected package linux-headers-5.19.0-051900-generic. (Reading database ... 71272 files and directories currently installed.) Preparing to unpack linux-headers-5.19.0-051900-generic_5.19.0-051900.202207312230_amd64.deb ... Unpacking linux-headers-5.19.0-051900-generic (5.19.0-051900.202207312230) ... Selecting previously unselected package linux-headers-5.19.0-051900. Preparing to unpack linux-headers-5.19.0-051900_5.19.0-051900.202207312230_all.deb ... Unpacking linux-headers-5.19.0-051900 (5.19.0-051900.202207312230) ... Selecting previously unselected package linux-image-unsigned-5.19.0-051900-generic. Preparing to unpack linux-image-unsigned-5.19.0-051900-generic_5.19.0-051900.202207312230_amd64.deb ... Unpacking linux-image-unsigned-5.19.0-051900-generic (5.19.0-051900.202207312230) ... Selecting previously unselected package linux-modules-5.19.0-051900-generic. Preparing to unpack linux-modules-5.19.0-051900-generic_5.19.0-051900.202207312230_amd64.deb ... Unpacking linux-modules-5.19.0-051900-generic (5.19.0-051900.202207312230) ... Setting up linux-headers-5.19.0-051900 (5.19.0-051900.202207312230) ... Setting up linux-headers-5.19.0-051900-generic (5.19.0-051900.202207312230) ... Setting up linux-image-unsigned-5.19.0-051900-generic (5.19.0-051900.202207312230) ... I: /boot/vmlinuz is now a symlink to vmlinuz-5.19.0-051900-generic I: /boot/initrd.img is now a symlink to initrd.img-5.19.0-051900-generic Setting up linux-modules-5.19.0-051900-generic (5.19.0-051900.202207312230) ... Processing triggers for linux-image-unsigned-5.19.0-051900-generic (5.19.0-051900.202207312230) ... /etc/kernel/postinst.d/initramfs-tools: update-initramfs: Generating /boot/initrd.img-5.19.0-051900-generic /etc/kernel/postinst.d/zz-update-grub: Sourcing file `/etc/default/grub' Sourcing file `/etc/default/grub.d/50-cloudimg-settings.cfg' Sourcing file `/etc/default/grub.d/init-select.cfg' Generating grub configuration file ... Found linux image: /boot/vmlinuz-5.19.0-051900-generic Found initrd image: /boot/initrd.img-5.19.0-051900-generic Found linux image: /boot/vmlinuz-5.15.0-41-generic Found initrd image: /boot/initrd.img-5.15.0-41-generic Warning: os-prober will not be executed to detect other bootable partitions. Systems on them will not be added to the GRUB boot configuration. Check GRUB_DISABLE_OS_PROBER documentation entry. Adding boot menu entry for UEFI Firmware Settings ... done root@scw-awesome-hawking:~# ll /boot total 133665 drwxr-xr-x 4 root root 4096 Sep 23 18:45 ./ drwxr-xr-x 20 root root 4096 Sep 23 18:36 ../ -rw------- 1 root root 6249967 Jun 22 12:42 System.map-5.15.0-41-generic -rw------- 1 root root 6391505 Jul 31 22:30 System.map-5.19.0-051900-generic -rw-r--r-- 1 root root 261649 Jun 22 12:42 config-5.15.0-41-generic -rw-r--r-- 1 root root 269041 Jul 31 22:30 config-5.19.0-051900-generic drwx------ 3 root root 512 Jan 1 1970 efi/ drwxr-xr-x 6 root root 4096 Sep 23 18:45 grub/ lrwxrwxrwx 1 root root 32 Sep 23 18:44 initrd.img -> initrd.img-5.19.0-051900-generic -rw-r--r-- 1 root root 31096565 Jul 18 02:11 initrd.img-5.15.0-41-generic -rw-r--r-- 1 root root 69646261 Sep 23 18:45 initrd.img-5.19.0-051900-generic lrwxrwxrwx 1 root root 28 Jul 18 02:10 initrd.img.old -> initrd.img-5.15.0-41-generic lrwxrwxrwx 1 root root 29 Sep 23 18:44 vmlinuz -> vmlinuz-5.19.0-051900-generic -rw------- 1 root root 11086240 Jun 22 13:24 vmlinuz-5.15.0-41-generic -rw------- 1 root root 11848864 Jul 31 22:30 vmlinuz-5.19.0-051900-generic lrwxrwxrwx 1 root root 25 Jul 18 02:10 vmlinuz.old -> vmlinuz-5.15.0-41-generic
Now, halting then rebooting from the scaleway interface (instead of pressing the reboot button like tried before):
root@scw-awesome-hawking:~# uname -r 5.19.0-051900-generic root@scw-awesome-hawking:~# ll /boot total 133665 drwxr-xr-x 4 root root 4096 Sep 23 18:45 ./ drwxr-xr-x 20 root root 4096 Sep 23 18:48 ../ -rw------- 1 root root 6249967 Jun 22 12:42 System.map-5.15.0-41-generic -rw------- 1 root root 6391505 Jul 31 22:30 System.map-5.19.0-051900-generic -rw-r--r-- 1 root root 261649 Jun 22 12:42 config-5.15.0-41-generic -rw-r--r-- 1 root root 269041 Jul 31 22:30 config-5.19.0-051900-generic drwx------ 3 root root 512 Jan 1 1970 efi/ drwxr-xr-x 6 root root 4096 Sep 23 18:45 grub/ lrwxrwxrwx 1 root root 32 Sep 23 18:44 initrd.img -> initrd.img-5.19.0-051900-generic -rw-r--r-- 1 root root 31096565 Jul 18 02:11 initrd.img-5.15.0-41-generic -rw-r--r-- 1 root root 69646261 Sep 23 18:45 initrd.img-5.19.0-051900-generic lrwxrwxrwx 1 root root 28 Jul 18 02:10 initrd.img.old -> initrd.img-5.15.0-41-generic lrwxrwxrwx 1 root root 29 Sep 23 18:44 vmlinuz -> vmlinuz-5.19.0-051900-generic -rw------- 1 root root 11086240 Jun 22 13:24 vmlinuz-5.15.0-41-generic -rw------- 1 root root 11848864 Jul 31 22:30 vmlinuz-5.19.0-051900-generic lrwxrwxrwx 1 root root 25 Jul 18 02:10 vmlinuz.old -> vmlinuz-5.15.0-41-generic