Issues with Centos/ version 3.* Kernels

[TomSweeneyRedHat]

Pinesh Shah Reports as a reply to the buildah blog:

Hi Tom,

It was really a nice and simple article to have a quick view of buildah at work.

Although i tried setting up buildah on centos, the buildah command is up and now i am able to see the buildah version information

$buildah --version
buildah version 0.3 (image-spec 1.0.0, runtime-spec 1.0.0)

Although when i try a simple buildah from for eg.
$buildah from centos
ERRO[0000] driver not supported
driver not supported

Not sure why did you face something similar to this or any idea where i should start exploring on this.

Thanks & Regards,
Pinesh Shah

In addition I tried myself and received a kernel age error. I suspect that Pinesh's issue is due to runc being older than buildah is expecting. I'm not as sure about the error that I received, it may be a configuration issue as I threw the vm together pretty quickly.

buildah from centos

ERRO[0000] kernel too old to provide multiple lowers feature for overlay: driver not supported
kernel too old to provide multiple lowers feature for overlay: driver not supported

cat /etc/*release

CentOS Linux release 7.3.1611 (Core)
NAME="CentOS Linux"
VERSION="7 (Core)"
ID="centos"
ID_LIKE="rhel fedora"
VERSION_ID="7"
PRETTY_NAME="CentOS Linux 7 (Core)"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:centos:centos:7"
HOME_URL="https://www.centos.org/"
BUG_REPORT_URL="https://bugs.centos.org/"

CENTOS_MANTISBT_PROJECT="CentOS-7"
CENTOS_MANTISBT_PROJECT_VERSION="7"
REDHAT_SUPPORT_PRODUCT="centos"
REDHAT_SUPPORT_PRODUCT_VERSION="7"

CentOS Linux release 7.3.1611 (Core)
CentOS Linux release 7.3.1611 (Core)
[root@localhost buildah]# rpm -qa | grep runc
runc-1.0.0-6.gite800860.el7.x86_64

[rhatdan]

buildah --storage-driver=devicemapper ...

Should fix his issue. There is a change I just got merged into containers/storage that was forcing overlay on CentOS and RHEL, which is causing these issues, I believe.

[TomSweeneyRedHat]

Thanks Dan. I found the issue that I was having. You need to update the kernel in order to get overlayfs to work. It requires version 4.0+ and CentOS 7 is at:

# uname -a
Linux localhost.localdomain 3.10.0-514.el7.x86_64 #1 SMP Tue Nov 22 16:42:41 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
The latest kernel is:
# uname -a
Linux localhost.localdomain 4.12.4-1.el7.elrepo.x86_64 #1 SMP Thu Jul 27 20:03:28 EDT 2017 x86_64 x86_64 x86_64 GNU/Linux

To update  the kernel (per https://www.ostechnix.com/install-linux-kernel-4-12-centos-ubuntu/): 
rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org
rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-2.el7.elrepo.noarch.rpm
yum install yum-plugin-fastestmirror
yum --enablerepo=elrepo-kernel install kernel-ml

Reboot and select the 4.* variant kernel on the console.

# buildah from centos
Getting image source signatures
Copying blob sha256:7b6bb4652a1be64d39920f7d8c12c5f0bd8abfc10820177109e73817357c07e3
 67.22 MiB / 67.22 MiB [=======================================================]
Copying config sha256:36540f359ca3b021d4b6a37815e9177b6c2bb3817598979ea55aee7ecc5c2c1f
 0 B / 1.79 KiB [--------------------------------------------------------------]
Writing manifest to image destination
Storing signatures
centos-working-container

# buildah containers
CONTAINER ID  BUILDER  IMAGE ID     IMAGE NAME                       CONTAINER NAME
eab40069a941     *     cd3de852a969 docker.io/library/centos:latest  centos-working-container
# buildah images
IMAGE ID             IMAGE NAME                                               CREATED AT             SIZE
cd3de852a969         docker.io/library/centos:latest                          Jul 5, 2017 21:04      183.6 MB

[rhatdan]

Right we need to start requiring 7.4 or later kernels for all of the tools rather then dealing with systems that do not support overlay file system.

[boaz0]

I guess mentioning this in README.md is good enough for closing this ticket, unless you have a better idea.

[TomSweeneyRedHat]

#372 should fix this.

[TomSweeneyRedHat]

Closing, fixed with #372