Stephen Harris wrote:> I'm wondering what the best way of building a UML image is; I tried the
> following based on documents I found on the web for FC2
>
> mkdir -p $T/etc $T/dev $T/proc $T/sys $T/var/tmp $T/var/cache/yum \
> $T/var/lock/rpm $T/var/cache/yum/update/headers \
> $T/var/cache/yum/update/packages
>
> touch $T/etc/fstab
> mknod $T/dev/null c 1 3
> chmod 666 $T/dev/null
> mount --bind /proc $T/proc
> mount --bind /sys $T/sys
>
> rpm --root $T -Uvh --nodeps --force
$UML/RPM/centos-release-4-4.2.i386.rpm \
> $UML/RPM/yum-2.4.3-1.c4.noarch.rpm
>
> yum -y -C --installroot=$T groupinstall "Base"
>
>
> ($T is a temp directory; $UML is where I'm storing my software)
>
> Unfortunately yum fails to run, complaining about repomd.xml files being
> missing.
>
>
>
> + rpm --root /var/tmp/bld.13824 -Uvh --nodeps --force
/usr/local/uml/RPM/centos-release-4-4.2.i386.rpm
/usr/local/uml/RPM/yum-2.4.3-1.c4.noarch.rpm
> warning: /usr/local/uml/RPM/centos-release-4-4.2.i386.rpm: V3 DSA
signature: NOKEY, key ID 443e1821
> Preparing... ###########################################
[100%]
> 1:yum ########################################### [
50%]
> error: %post(yum-2.4.3-1.c4.noarch) scriptlet failed, exit status 255
> 2:centos-release ###########################################
[100%]
> + yum -y -C --installroot=/var/tmp/bld.13824 groupinstall Base
> Setting up Group Process
> Setting up repositories
> Cannot open/read repomd.xml file for repository: update
> Cannot find repomd.xml file for update
> Error: Cannot find repomd.xml file for update
>
>
>
> (The yum rpm install problem is because chkconfig doesn't exist; not
> a problem.)
>
> Any ideas?
>
I think I've seen this when I have a repository listed in
/etc/yum.repos.d that I don't have access to. For example, I tried
mirroring a CentOS mirror and left [centosplus] in my local.repo file,
but didn't mirror the centosplus tree. Of course it didn't find
repomd.xml for centosplus, so it just quit. So check the [update] repo
pathing in your /etc/yum.repos.d/ file that you're actually using first.
I should mention that when I first saw the FC4 Xen howto that used yum
to create a core filesystem, it worked for me when creating a UML
rootfs. I'd consider that some of the newer Xen scripts in FC6 might
also prove useful for creating UML root filesystems, too.
http://uml.jfdi.org/uml/Wiki.jsp?page=BuildingRootFileSystems
http://uml.jfdi.org/uml/Wiki.jsp?page=UMLRootFilesystems
Jed