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https://github.com/stuffo/scaleway-ubuntukernel

Simply run Ubuntu default or mainline kernels on Scaleway x86_64 Ubuntu instances
https://github.com/stuffo/scaleway-ubuntukernel

kexec mainline-kernel scaleway ubuntu ubuntu-kernel

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Simply run Ubuntu default or mainline kernels on Scaleway x86_64 Ubuntu instances

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README 

        
Run standard Ubuntu Kernels on Scaleway x86_64 Ubuntu instances

===============================================================



Scaleway is great but I've grown tired of theier old home-brewed kernels with

missing modules and features. Why not use standard Ubuntu kernels instead? 

With this package you can use standard Ubuntu kernels on your Scaleway x86_64

instances by the magic of KEXEC. 



Be aware that you don't need all of this if you are using the newer Scaleway

locally booted instances (eg. START1). This instances use the distributions 

kernel anyhow.



Requirements

============

Just make sure your current Scaleway kernel has KEXEC support. 

E.g. 4.9.20 std #1 bootscript. You can adjust this via the 

bootscript setting in the Advanced section of the cloud.scaleway.com interface.



Install

=======

1. Make sure your system is up-to-date and get the Ubuntu package:  

   ``curl -LO https://github.com/stuffo/scaleway-ubuntukernel/releases/download/v1.2/scaleway-ubuntukernel_1.2-1_amd64.deb ``

2. You can skip this step if you already installed any kernel package providing linux-image. 

   Otherwise, get some Ubuntu kernel. E.g. current mainline kernels from http://kernel.ubuntu.com/~kernel-ppa/mainline:  

   ``curl -LO http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.10.3/linux-image-4.10.3-041003-generic_4.10.3-041003.201703142331_amd64.deb``  

   ``apt install ./linux-image-4.10.3-041003-generic_4.10.3-041003.201703142331_amd64.deb ``  

   Ignore/dismiss all Grub related setup messages, you don't need it.

3. Install this package:  

   ``apt install ./scaleway-ubuntukernel_1.2-1_amd64.deb ``  

   Say No when asked about using Kexec reboot, it will interfere with this kexec service.

4. Make sure Ubuntu kexec service is disabled. Required as Ubuntu will kexec too early and leave a dirty filesystem.

   `` systemctl disable kexec ``

5. Reboot. That's it. Your system will kexec into your Ubuntu kernel on startup.

   

Uninstall

=========

Either remove the package or just disable the service:

``systemctl disable scaleway-ubuntukernel``



Troubleshooting

===============

You can run ubuntukernel-load.sh manually as root. It is quite verbose. Be 

aware that your system will reboot (kexec) if all went fine.



If your initrd or kernel is bad you can get stuck with a non booting system.

Add a server tag in the Scaleway webui with the name `ubuntukernel_disabled`

and kexec won't be executed on bootup anymore.  



Other usefull Scaleway related tags are `INITRD_POST_SHELL=1` which will drop 

you in a shell after the whole initrd shebang is done so you can tinker with 

your filesystem. Also consider `INITRD_VERBOSE=1` to make initrd more verbose.

`INITRD_DEBUG=1` is maximum verbose and will trace all commands that get 

executed in initrd.



Build

=====

Make sure you have devscripts package installed.



1. clone repo ``git clone https://github.com/stuffo/scaleway-ubuntukernel.git``

2. run debuild to build debian package  

   ``debuild -i -us -uc -b``



TODO

====

* account scaleway initrd version for automatic initrd regeneration on change