Hi,
today I wanted to test cloudmin but I encountered this problem:
This system cannot be a Xen host : The required command xm does not exist. Perhaps the Xen software is not installed? Virtual systems cannot be created or added until this is fixed.
I searched and found this:
Xen-4.4 and libxl Note: All versions of Xen before version 4.4 had xm and xend enabled by default. The xen-4.4.1 (and newer) rpms instead enable xl support and no longer use xend. Please see /MigratingToXl for details on how to migrate from em rpms older than 4.4.1 to the new version
Host is latest CentOS + XEN. How can I fix this?
All versions of Xen before version 4.4 had xm and xend enabled by default. The xen-4.4.1 (and newer) rpms instead enable xl support and no longer use xend.
xend is deprecated but still works, all you have to do is (on CentOS):
chkconfig xend on
service xend start
[root@localhost /]# chkconfig xend on error reading information on service xend: No such file or directory
[root@localhost /]# service xend start xend: unrecognized service
What distro are you running and where did you get Xen from? I'm using Xen 4 CentOS 6 from the CentOS-Virt SIG, and it works fine. See https://wiki.centos.org/HowTos/Xen/Xen4QuickStart. Can you post output from:
rpm -qi xen
uname -a
I'm using : CentOS release 6.7 (Final). i already followed those steps, but xen didn't boot. So I installed cloudmin. - it boots into xen kernel and everything looks god. Only thing is that cloudmin shows this message: "This system cannot be a Xen host : The required command xm does not exist. Perhaps the Xen software is not installed? Virtual systems cannot be created or added until this is fixed."
[root@localhost /]# rpm -qi xen package xen is not installed (I assume that this is'nt right)
[root@localhost /]# uname -a Linux localhost.localdomain 3.18.21-1.el6xen.x86_64 #1 SMP Wed Sep 2 17:38:26 AEST 2015 x86_64 x86_64 x86_64 GNU/Linux
Yeah, looks like you installed the xen-enabled kernel but not Xen its self. Not sure how you ended up there. The instructions on the Xen 4 quick start say to run "yum install xen", I guess something went wrong at that step.
Once you get the xen package installed, you should be able to enable xend and then Cloudmin should work fine.
oh.., [root@localhost xen]# yum install xen Loaded plugins: fastestmirror, security Setting up Install Process Loading mirror speeds from cached hostfile * base: mirrors.pidginhost.com * extras: mirrors.uav.ro * kernel-xen: us2.mirror.crc.id.au * updates: mirrors.uav.ro Package xen-4.4.3-1.el6.x86_64 is obsoleted by xen44-4.4.2-2.el6.x86_64 which is already installed Nothing to do
You've ended up with Xen from http://xen.crc.id.au/
Maybe Cloudmin installed it for you? I don't know, I always get Xen working before installing Cloudmin
I would try uninstalling that version and follow the quick start guide for Xen 4 CentOS 6, that has xend support and works with Cloudmin (we have dozens of servers with this configuration working perfectly)
Yup - cloudmin instaled it. After clean install I run: yum update yum groupinstall base yum install centos-release-xen yum install xen chkconfig xend on
After that I tried to boot xen kernel, but with no luck.
Issue is that xen < 4.5 is not supported for CentOS 7. So, at this time it seems that either CM needs to be updated to use xl with xen 4.5 or use CentOS 6 with Xen 4.2.
I'm hoping that if we rally enough requests for xl, we can move onto Xen on CentOS 7.