CentOS - Jul 2018 - Issues booting centos7 [dracut is failing to enable centos/root, centos/swap LVs]

>
> But, what happens if you let the kernel post install scripts do the work
> or setting up the initrd things?

Initially, I just rebooted from LiveCD and left Grub,kernel and dracut do
their job with the defaults, but unfortunately, boot process stops at
initrd (dracut) stage with the following error:

[  197.768159] localhost.localdomain dracut-initqueue[252]: Warning:
Could
> not boot.
> [  197.821409] localhost.localdomain systemd[1]: Received SIGRTMIN+20 from
> PID 254 (plymouthd).
> [  197.822328] localhost.localdomain dracut-initqueue[252]: Warning:
> /dev/centos/root does not exist
> [  197.823044] localhost.localdomain dracut-initqueue[252]: Warning:
> /dev/centos/swap does not exist
> [  197.846807] localhost.localdomain systemd[1]: Starting Dracut Emergency
> Shell...
> [  197.870983] localhost.localdomain systemd[1]: Received SIGRTMIN+21 from
> PID 254 (plymouthd).

Then, I'm dropped to dracut shell, where I boot the system by using the lvm
commands as described to my first post.
Once in O/S, I re-create initrd by using 'dracut -f -v -a lvm' command
and
reboot again the system.
But still I get the same error during boot ...

If you reinstall the latest kernel, does
> it change anything?
>
 This is actually the latest kernel (3.10.0-862.9.1.el7.x86_64) but I tried
to boot with the second (older) kernel
(vmlinuz-3.10.0-327.36.3.el7.x86_64), where I got exactly the same error
during boot.

Clearly, this is not a kernel issue, perhaps not even a dracut (initrd)
issue, since everything was working fine, before resizing the PV/LV. I
suspect that something went wrong during that step, but what? As I can
successfully boot the system manually via dracut, normally everything
should be ok? no?

What can prevent dracut from activating the 2 LVs (centos/root and
centos/swap) during initial boot phase ?

Thanks,
Yannis

Yannis Milios wrote:
>> But, what happens if you let the kernel post install scripts do the
>> work or setting up the initrd things?
>
> Initially, I just rebooted from LiveCD and left Grub,kernel and dracut do
>  their job with the defaults, but unfortunately, boot process stops at
> initrd (dracut) stage with the following error:
>
> [  197.768159] localhost.localdomain dracut-initqueue[252]: Warning:
> Could
>
>> not boot. [  197.821409] localhost.localdomain systemd[1]: Received
>> SIGRTMIN+20 from
>> PID 254 (plymouthd).
>> [  197.822328] localhost.localdomain dracut-initqueue[252]: Warning:
>> /dev/centos/root does not exist
>> [  197.823044] localhost.localdomain dracut-initqueue[252]: Warning:
>> /dev/centos/swap does not exist
>> [  197.846807] localhost.localdomain systemd[1]: Starting Dracut
>> Emergency
>> Shell...
>> [  197.870983] localhost.localdomain systemd[1]: Received SIGRTMIN+21
>> from PID 254 (plymouthd).
>>
>
>
> Then, I'm dropped to dracut shell, where I boot the system by using the
> lvm commands as described to my first post. Once in O/S, I re-create initrd
> by using 'dracut -f -v -a lvm' command and reboot again the system.
But
> still I get the same error during boot ...
>
> If you reinstall the latest kernel, does
>
>> it change anything?
>>
>
> This is actually the latest kernel (3.10.0-862.9.1.el7.x86_64) but I
> tried to boot with the second (older) kernel
> (vmlinuz-3.10.0-327.36.3.el7.x86_64), where I got exactly the same error
> during boot.
>
> Clearly, this is not a kernel issue, perhaps not even a dracut (initrd)
> issue, since everything was working fine, before resizing the PV/LV. I
> suspect that something went wrong during that step, but what? As I can
> successfully boot the system manually via dracut, normally everything
> should be ok? no?
>
> What can prevent dracut from activating the 2 LVs (centos/root and
> centos/swap) during initial boot phase ?
>
Suggestion: once it's up, rebuild the initramfs.

      mark

Suggestion: once it's up, rebuild the initramfs.
>
>
I tried that already, but still the same problem.
Aparently dracut does not want to activate the LVs required to boot to the
root filesystem, for some reason ...

Yannis


-- 
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> Yannis Milios wrote:
>>> But, what happens if you let the kernel post install scripts do the
>>> work or setting up the initrd things?
>>
>> Initially, I just rebooted from LiveCD and left Grub,kernel and dracut
>> do
>>  their job with the defaults, but unfortunately, boot process stops at
>> initrd (dracut) stage with the following error:
>>
>> [  197.768159] localhost.localdomain dracut-initqueue[252]: Warning:
>> Could
>>
>>> not boot. [  197.821409] localhost.localdomain systemd[1]: Received
>>> SIGRTMIN+20 from
>>> PID 254 (plymouthd).
>>> [  197.822328] localhost.localdomain dracut-initqueue[252]:
Warning:
>>> /dev/centos/root does not exist
>>> [  197.823044] localhost.localdomain dracut-initqueue[252]:
Warning:
>>> /dev/centos/swap does not exist
>>> [  197.846807] localhost.localdomain systemd[1]: Starting Dracut
>>> Emergency
>>> Shell...
>>> [  197.870983] localhost.localdomain systemd[1]: Received
SIGRTMIN+21
>>> from PID 254 (plymouthd).
>>>
>>
>>
>> Then, I'm dropped to dracut shell, where I boot the system by using
the
>> lvm commands as described to my first post. Once in O/S, I re-create
>> initrd
>> by using 'dracut -f -v -a lvm' command and reboot again the
system. But
>> still I get the same error during boot ...
>>
>> If you reinstall the latest kernel, does
>>
>>> it change anything?
>>>
>>
>> This is actually the latest kernel (3.10.0-862.9.1.el7.x86_64) but I
>> tried to boot with the second (older) kernel
>> (vmlinuz-3.10.0-327.36.3.el7.x86_64), where I got exactly the same
error
>> during boot.
>>
>> Clearly, this is not a kernel issue, perhaps not even a dracut (initrd)
>> issue, since everything was working fine, before resizing the PV/LV. I
>> suspect that something went wrong during that step, but what? As I can
>> successfully boot the system manually via dracut, normally everything
>> should be ok? no?
>>
>> What can prevent dracut from activating the 2 LVs (centos/root and
>> centos/swap) during initial boot phase ?
>>
> Suggestion: once it's up, rebuild the initramfs.
And when you did so, did you remove the "rd.shell" from
GRUB_CMDLINE_LINUX
before?

Regards,
Simon