[systemd-devel] Prerequisites for systemd.volatile=yes

[Shreenidhi Shedi]

Hi All,

Any inputs on this?

--
Shedi


On Mon, Apr 15, 2024 at 7:15 PM Shreenidhi Shedi <
shreenidhi.shedi at broadcom.com> wrote:

> Hi All,
>
> I'm trying to use volatile root feature for the first time.
>
> This is my /etc/fstab:
> ```
> #system mnt-pt type options dump fsck
> PARTUUID=ad7ab716-2c0a-4dbe-9a28-06dc8bd0383b / ext4
> defaults,barrier,noatime,data=ordered 1 1
> ```
>
> And systemd grub configs are:
> systemd_cmdline=net.ifnames=0 plymouth.enable=0
> systemd.unified_cgroup_hierarchy=yes systemd.volatile=yes
>
> Finally, kernel command is:
> BOOT_IMAGE=/vmlinuz-6.1.83-1.ph5
> root=PARTUUID=ad7ab716-2c0a-4dbe-9a28-06dc8bd0383b init=/lib/systemd/systemd
> ro loglevel=3 quiet net.ifnames=0 plymouth.enable=0
> systemd.unified_cgroup_hierarchy=yes systemd.volatile=yes
>
> And I regenerated initrd using `mkinitrd`
>
> But when I rebooted my vm, it is going to emergency shell and shows
> /run/initramfs/rdsosreport.txt and I'm not able to get into emergency shell
> either, it just keeps looping in press Ctrl-D or enter root password prompt
> and entering root password or pressing Ctrl-D just prompts the same thing
> again.
>
> Can someone assist me on what are the prerequisites for enabling volatile
> root?
>
> - Kernel configs to be enabled
> - File system types supported
> - Kernel command line args needed
>
> If someone can provide a step by step procedure on how to see this feature
> in action, it would really help.
>
> --
> Shedi
>
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