Hello,
I'm new to CentOS and looking for any useful instructions/documentation to read up on.
I would like to learn about how the rootfs has been generated for CentOS.
The Alternative Architecture Centos SIG already prepared a tar archive containing a CentOS 7 userland for ARM64 server boards:
curl -sSL -o CentOS-7-aarch64-rootfs-7.3.1611.tar.xz http://mirror.centos.org/altarch/7/isos/aarch64
Could someone provide instructions on the steps take to build this exact image?
Thanks, Scott
I generate the rootfs with the livemedia-creator tool, and the kickstart included in the README. You could do something similar with a command something like:
livemedia-creator --no-virt --make-disk --project "My Custom Build" --releasever "7" --image-name "MyCustomRootFS" --ks MyKickstart.ks
On 06/28/2017 01:35 PM, Scott Branden wrote:
Hi Jim,
Thanks for the pointer (I know nothing about CentOS).
I assume the ReadMe.txt you are referring to is here:
http://mirror.centos.org/altarch/7/isos/aarch64/ReadMe.txt
Is there a getting started page somewhere I am missing?
Where do I get the livemedia-creator tool from?
Do I download CentOS-7-aarch64-Everything.iso or what is it used for?
Thanks,
Scott
On 17-06-28 03:06 PM, Jim Perrin wrote:
I may have read your initial email incorrectly, so lets back up and look at what your goals are so that I can help appropriately.
Are you wanting to install CentOS on a currently supported aarch64 server, or are you trying to get CentOS working on a new (unsupported) SoC?
On 06/28/2017 05:47 PM, Scott Branden wrote:
Hi Jim,
Yes, we wish to add support for new (currently CentOS unsupported) Arm64 SoCs.
Currently we have a Yocto based distribution that builds ATF (with UEFI), Kernel+DTBs, Host tools+utilities (such as signing+flashing type tools), RootFS, and RPMs.
I took the prebuilt CentOS Rootfs and it boots on our platform to the shell. So that is a great start. But we use a different kernel versions so I was thinking we need to rebuild against our kernel headers to ensure 100% API compatibility. Or, do you think that is not necessary (we are working on 4.12 kernel right now)?
We also have kernel modules built inside and outside of the kernel tree that need to be installed in lib/modules. And firmware in lib/firmware. And we need to install our kernel headers for native development on platform. How should these be integrated with CentOS?
We also have RPMs built in Yocto that we would like to install - need to learn mechanism of how to add new RPMs in CentOS. One thing that may need to be resolved is shared libraries?
Last item I can think of right now is recommended runtime method from RPM install. We use DNF server with Yocto Distribution. We need to add our RPMs to whatever CentOS uses.
So the answer to your question is yes we would like to add CentOS support for our SoCs.
Thanks,
Scott
On 17-06-29 08:31 AM, Jim Perrin wrote:
On 06/29/2017 09:58 AM, Scott Branden wrote:
I'd like to work with you to support the SoC in the distribution itself. If all the required kernel changes are upstream in the mainline linux kernel, we should be able to make this happen reasonably easily.
I'm happy to work through this with you off-list, or setup a call where we can talk over requirements etc.
-
Jim Perrin -
Scott Branden