Problem OVH Cpanel Cloudlinux
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  1. KinderOvO
  2. Thursday, 09 March 2017
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Hello, I've always used OVH with normal Cpanel / Cloudlinux, and now I've hired 2 new servers and I'm having problems in both.

- after installation of Centos 7.3 + Cpanel, I do the installation of the server, soon after the reboot the server does not return.

When accessing the IPM of the OVH, the message grub>

For the server to come back, I have to go to boot and select a 3.14 vanilla kernel and select boot by network, so when server comes back, I can not install cagefs because the kernel is not compatible.

Has any change been made? Because the years I always used without problems.

Whoever had this problem, could you tell us how you solved it?
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  1. 20.03.2017 13:03:05
  2. # 1
KinderOvO Accepted Answer
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You could do a step-by-step tutorial, because this one is not working for nvme ovh disks, I followed the above steps but they did not work, they could add problem solving information, so I would not have to open a ticket every time for you.
  1. 20.03.2017 14:03:09
  2. # 2
KinderOvO Accepted Answer
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I already have a ticket opened, I received a new ovh server with nvme disks today, the problem continues, when installing cldeploy and reboot, system does not return, I need to access ovh manager and select boot by network and vanilla kernel that is not compatible with cloudlinux.
  1. 02.04.2017 10:04:08
  2. # 3
KinderOvO Accepted Answer
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I have 2 servers, problem occurs on new servers with nvme disks, with normal ssd the problem does not occur.
  1. 04.04.2017 13:04:34
  2. # 4
KinderOvO Accepted Answer
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OK! Thank you for the attention you give to your customers. Waiting for a solution, I have 2 new nvme servers, just waiting for a solution for me to install the cloudlinux system on them.
  1. 07.04.2017 07:04:30
  2. # 5
KinderOvO Accepted Answer
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CentOS 7.3 and then converted to CL7
  1. 07.04.2017 08:04:24
  2. # 6
KinderOvO Accepted Answer
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I tested raid 0 and raid 1

8196 swap
/ Remaining space
  1. 10.04.2017 17:04:08
  2. # 7
Baby Accepted Answer
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Hello,

If the OP opens a ticket, please update this thread with the final outcome, as we are standing by and waiting to obtain similar servers if there is either no issue or an official solution to the issue.

Thank you!
  1. 20.04.2017 02:04:21
  2. # 8
Baby Accepted Answer
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Just checking to see if this issue is still occurring at this time with the OP, and if not, what were the steps taken to resolve the issue?
  1. 20.04.2017 13:04:32
  2. # 9
KinderOvO Accepted Answer
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I have 3 clients and all with the same problems, that is, not in my installation, because everyone reported the same problem.

More than 1 month and no solution, really tricky to pay for something that does not work right.
  1. 20.04.2017 14:04:14
  2. # 10
Baby Accepted Answer
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Have you opened a support ticket with CloudLinux as they have requested, so that they can look into this?
  1. 21.04.2017 05:04:15
  2. # 11
Ricardo Accepted Answer
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Hello,
I just have the very same problem,
This is my first server with OVH but before I had other server that were I made the installation without any problem.

After I have installed WHM I followed the instructions to instal cloudlinux from:
https://www.cloudlinux.com/getting-started-with-cloudlinux-os/39-installing-cloudlinux-os/922-installing-on-centos-server-with-cpanel

Then when its time to reboot, the server is not reachable anymore

I got

Destination Host Unreachable From ######: Destination Host Unreachable

--- ########## ping statistics ---
10 packets transmitted, 0 packets received, +6 errors, 100% packet loss

I have reinstalled WHM 2 times with the same result,

Someone has found a solution?

I tried to follow:
http://kb.cloudlinux.com/2016/11/running-cloudlinux-7-with-ovh-server/

and http://kb.cloudlinux.com/2015/05/how-do-i-choose-which-kernel-to-boot-on-cloudlinux-7/
but got not success.

Please let me know if more information is needed to resolve this or if someone was able to fix this.

Thank you
  1. 24.04.2017 13:04:02
  2. # 12
Anton Volkov Accepted Answer
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Hello!

We have just updated cldeploy script so it will check GRUB configuration on OVH servers and print errors when found.

Please try.
  1. 24.04.2017 19:04:35
  2. # 13
Ricardo Accepted Answer
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Hello,
Thank you for your follow up,
The Support team from cloudlinux helped me to fix it,
I was told that was about the grub2 settings
Thanks your your help,
Best regards.
  1. 25.04.2017 05:04:27
  2. # 14
Baby Accepted Answer
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Thanks Ricardo for the update.

Could you provide the steps you had to take to resolve the issue?
  1. 25.04.2017 19:04:21
  2. # 15
Ricardo Accepted Answer
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Hello Baby,
Sure, the main reason of the fix was that the Cloudlinux support team helped me all the way so I would suggest you to do the same if your facing something similar but maybe you have more knowledge on this so you can use this information that were the steps and responses that I got on the ticket (some configurations were made by the support team and not by me)
Hope it Helps.

********************************
********************************

It is known that sometimes boot can be improperly configured to work with CloudLinux. It is not related to cPanel. Here is a checklist you need to look before rebooting server:
Checkilist if our kernel is not booting on OVH :

1. add raid autospin to /etc/default/grub
GRUB_CMDLINE_LINUX="net.ifnames=0 rd.auto=1"

2. regenerate grub.cfg
grub2-mkconfig -o /boot/grub2/grub.cfg

make cloudlinux kernel default if needed

3. create following file

cat /etc/dracut.conf.d/raid.conf
add_drivers="$add_drivers raid1 raid0"

4. re-create initrd (please note that different kernel version may be used, so correct command accordingly)
dracut -f /boot/initramfs-3.10.0-427.10.1.lve1.4.7.el7.x86_64.img 3.10.0-427.10.1.lve1.4.7.el7.x86_64

5. Check if raid modules are present on initrd
lsinitrd /boot/initramfs-3.10.0-427.10.1.lve1.4.7.el7.x86_64.img | grep raid..ko
-rw-r--r-- 1 root root 26065 Apr 2 17:54 usr/lib/modules/3.10.0-427.10.1.lve1.4.7.el7.x86_64/kernel/drivers/md/raid0.ko
-rw-r--r-- 1 root root 63945 Apr 2 17:54 usr/lib/modules/3.10.0-427.10.1.lve1.4.7.el7.x86_64/kernel/drivers/md/raid1.ko


********************************
********************************

I've re-checked your grub settings and found several issues, so I've corrected your config /etc/default/grub (it's original is /etc/default/grub.old) and also created the file /boot/efi/EFI/centos/grub.cfg. I think this time the server should be able to boot with CL kernel.

Please switch in your OVH panel the boot mode to 'boot from HDD' and reboot the server. In case, if it will be unable to boot, please switch the boot mode back to CentOS vanilla kernel and contact us. Or, you can provide us access (login info) to your OVH panel and we'll try to reboot, but only after your confirmation.


*********************************
*********************************

I tried to reconfigure grub2 settings. Please, try to restart once again.


*********************************
*********************************

After all this I changed the server to boot from HDD worked perfectly.
  1. 29.07.2017 17:07:37
  2. # 16
Chance Korte Accepted Answer
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I too have this same problem. CloudLinux support was able to fix this but if I ever do a hard reboot from the OVH Manager, the server goes back to the grub> screen and the server does not come back online unless I switch the netboot and contact CloudLinux support to fix it again.
  1. 29.07.2017 20:07:06
  2. # 17
Baby Accepted Answer
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You mentioned that the issue occurs after doing a hard reboot. Did you mean that there are no problems when you do a soft reboot?

We’ve only done soft reboots so far for OS updates etc. and never thought hard reboots would cause an issue, but can’t test now since there are live sites involved.
  1. 29.07.2017 23:07:19
  2. # 18
Chance Korte Accepted Answer
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You mentioned that the issue occurs after doing a hard reboot. Did you mean that there are no problems when you do a soft reboot?

We’ve only done soft reboots so far for OS updates etc. and never thought hard reboots would cause an issue, but can’t test now since there are live sites involved.


That is correct. As long as I do not have to do a hard reboot via the OVH manager (https://ca.ovh.com/manager), I do not have any problems.

I installed an OVH Centos 7 + cPanel template, converted immediately to CL 7 and only once I did a hard reboot did I have issues with the server coming online. Checking via IMPI reflects a grub> prompt. The only way to get the server to come back online after a hard reboot, like others have stated, is by switching to netboot to OVH's kernel.

I have a couple live sites on the server but am happy to let you test if it results in a resolution for myself and others. ^_^
  1. 30.07.2017 00:07:53
  2. # 19
Baby Accepted Answer
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Have you tried the OVH CloudLinux 7 template? Maybe that doesn’t have the hard reboot issues. That’s also the one we’re using, although we haven’t tried a hard reboot on that.
  1. 30.07.2017 04:07:03
  2. # 20
Chance Korte Accepted Answer
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No, I have not tried it that way. I have so much data on this server now that I would just rather the issue get resolved.
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