Re: [CentOS-virt] Need Help with Xen Please
Brett Worth wrote: Jason Taylor wrote: Can anyone suggest what the next course of action would be? The server has a single physical NIC and 1 IP. Will I need to request an additional IP address to use with the new guest I create? Jason, AFAIK you will need another IP address for the VM. This can be done either via DHCP or hard wired in the configuration file. Domain 0 can NAT for guest domains. With some scripting you could create another bridge device (e.g. br1) and use either Dom0 or a VM as a masquerading gateway device but that is left as an exercise for the reader. :-) ... or just use vif-script vif-nat in xend-config.sxp. -- Christopher G. Stach II ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] Need Help with Xen Please
On Thu, Nov 27, 2008 at 3:52 AM, Jason Taylor [EMAIL PROTECTED] wrote: Brett: Thank you for your help. It has been a few days since I was able to give this a try. However I installed Cygwin on my Windows desktop and SSH'd to the headless machine. I then ran virt-install without the graphics support. Doing this I was able to get past where it was stuck before. Glad that worked for you. Just to be clear, if you use 'ssh -Y target', you can use the graphical virt tools, I do this all the time. Brett ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
RE: [CentOS-virt] Need Help with Xen Please
Hello Kai: Thank you for your feedback. I apologize for not using the right terminology. As mentioned I followed the tutorial at http://www.howtoforge.com/centos_5.0_xen so that shows all the commands I used. When I tried to install a guest/domU I get the previous mentioned error. Virt-install doesnt seem to work as it seems to require a console which I do not have. All I have is root access to the server via SSH (not in same physical location as server) Jason -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Kai Schaetzl Sent: Sunday, November 16, 2008 4:31 A To: centos-virt@centos.org Subject: Re: [CentOS-virt] Need Help with Xen Please Jason Taylor wrote on Sat, 15 Nov 2008 17:00:46 -0700: One thing to note is that the base Xen installs fine it seems but when trying to create the virtual instance (domU) it says it cannot connect to the console. Then try without making it connect to the console. (I may have misunderstood what you mean by create, note, create means *starting* an existing VM. see below.) I looked at the how-to, it uses virt-install. That works very well. What exactly did you install as a domU? What where your commands? And when do you get that error, when you run virt-install and it wants to attach to the console or once it's finished and you start the VM up? One thing: you want to use the Xen 3.2 rpms provided by xen.org for serious production work on CentOS and not the one coming with CentOS. Suggest you read the archives of the list for all tips and caveats. Kai -- Kai Schätzl, Berlin, Germany Get your web at Conactive Internet Services: http://www.conactive.com ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] Need Help with Xen Please
On Tue, Nov 18, 2008 at 01:20:16AM -0700, Jason Taylor wrote: Hello Kai: what don't you use http://wiki.centos.org/HowTos/Xen/InstallingCentOSDomU and related links instead of howtoforge ? Tru -- Tru Huynh (mirrors, CentOS-3 i386/x86_64 Package Maintenance) http://pgp.mit.edu:11371/pks/lookup?op=getsearch=0xBEFA581B pgpGZlzQRjnHT.pgp Description: PGP signature ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] Need Help with Xen Please
Tru Huynh wrote on Tue, 18 Nov 2008 09:41:10 +0100: what don't you use http://wiki.centos.org/HowTos/Xen/InstallingCentOSDomU This tutorial is much more complicated than using virt-install. There is no need for installation kernels and such. You just run virt-install and off you go. Kai -- Kai Schätzl, Berlin, Germany Get your web at Conactive Internet Services: http://www.conactive.com ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] Need Help with Xen Please
Jason, I'm surely not going to read the whole tutorial. Tell what exact virt-install command you used and any preparation steps if you did any. (e.g. what did you install to get xen on the system.) Kai -- Kai Schätzl, Berlin, Germany Get your web at Conactive Internet Services: http://www.conactive.com ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] Need Help with Xen Please
Jason Taylor wrote: Kai: I used yum to install xen and xen-kernel I then edited the grub config and rebooted the server. Using uname -r I verified I was in the right kernel. I proceeded to use virt-install (and later virt-install --nographics and virt-install --vnc) and none of them will install the guest. It always fails saying that there is no console and to reconnect. When you connect to the Centos server from your remote console you said before that you're using ssh. Is this from another Linux system? You need to ensure that you have access to your local graphical interface from the remote server i.e. that you have a valid DISPLAY variable set. If echo $DISPLAY returns an empty string then maybe you just need to do ssh -X centos_server when connecting so that ssh will forward the X11 back to your display. Then virt-manager should work. Then again I might be misunderstanding the problem. Brett ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] Need Help with Xen Please
On Tue, Nov 18, 2008 at 6:41 AM, Brett Worth [EMAIL PROTECTED] wrote: Jason Taylor wrote: When you connect to the Centos server from your remote console you said before that you're using ssh. Is this from another Linux system? You need to ensure that you have access to your local graphical interface from the remote server i.e. that you have a valid DISPLAY variable set. If echo $DISPLAY returns an empty string then maybe you just need to do ssh -X centos_server when connecting so that ssh will forward the X11 back to your display. Then virt-manager should work. Sometimes ssh -Y works when ssh -X doesn't. Over time I've started using ssh -Y as it always works. If the server is setup correctly, it will not allow you to ssh as root, you'll need to ssh -Y as yourself and then su -. When you use the su command you might loose the DISPLAY variable, in this case simply re-establish it and all should work. If you workstation is Linux, you have an X-Display running. If it is Windows, you can use Cygwin as your X-Server. Brett ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] Need Help with Xen Please
Jason Taylor wrote on Tue, 18 Nov 2008 03:47:09 -0700: I proceeded to use virt-install (and later virt-install --nographics and virt-install --vnc) and none of them will install the guest. It always fails saying that there is no console and to reconnect. Ok, sorry, I expected to get a complete virt-install command line where I could derive the OS you want to install from. My mistake. You want to run virt-install without any parameter and answer all the questions. In that case I need to ask what OS you want to install. And, although you don't want to, have a look at man virt-install and then try an install that uses the command -line parameters instead of asking questions. Also, earlier you wrote: Xend does start and I can do everything listed in the tutorial until I get to the virt-manager part. So, is your problem now with virt-install or with virt-manager? Does your VM get created? Can you start it with xm create name of vm? Do you see it running in xm list? The main point here is that it's not clear from the beginning if virt-install cannot connect to the console and thus you cannot install the OS or if it all creates just fine and you later cannot attach to the running domU console. Kai -- Kai Schätzl, Berlin, Germany Get your web at Conactive Internet Services: http://www.conactive.com ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
RE: [CentOS-virt] Need Help with Xen Please
On Sat, 2008-11-15 at 19:18 -0700, Jason Taylor wrote:
Michael:
I was following the tutorial at http://www.howtoforge.com/centos_5.0_xen I
was not aware that virt-manager is GUI only.
Xend does start and I can do everything listed in the tutorial until I get
to the virt-manager part.
What command line do you use to create a virtual server with virtsh? I am
running as root, so that shouldn't be the issue.
The hardware does support virtualization and that is switched on in the
BIOS.
You can use `virt-install` to install a guest. To my knowledge, you
don't need any processor extensions to run Xen as it is a modified
kernel for para-virtualisation.
For Xen management I just use `xm ${command}` and I've heard that you
don't want to mix management with `xm` and `virsh`, so choose one and
stick with it. `xm create ${domain}` will start the specified 'domain'
with the config file of the same name in /etc/xen.
I hope that helps you out a bit :)
--Caitlyn
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Re: [CentOS-virt] Need Help with Xen Please
Michael Hall wrote: One thing: you want to use the Xen 3.2 rpms provided by xen.org for serious production work on CentOS and not the one coming with CentOS. Suggest you read the archives of the list for all tips and caveats. On the downloads page at xen.org I can only see source tarballs for 3.3. Am I looking in the wrong place? given that you are starting out with Xen now and getting into it, I would higly recommend you dont waste your time looking at the xensource / citrix package. Work with whats in the distro, its well tested as a unit, the tools just work and there is plenty of docs and help around to help when you need it. Fix the problems you come up against, and if one of them needs an upgrade out of the distro packages - consider it at the time. -- Karanbir Singh : http://www.karan.org/ : [EMAIL PROTECTED] ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] Need Help with Xen Please
Jason Taylor wrote on Sat, 15 Nov 2008 17:00:46 -0700: One thing to note is that the base Xen installs fine it seems but when trying to create the virtual instance (domU) it says it cannot connect to the console. Then try without making it connect to the console. (I may have misunderstood what you mean by create, note, create means *starting* an existing VM. see below.) I looked at the how-to, it uses virt-install. That works very well. What exactly did you install as a domU? What where your commands? And when do you get that error, when you run virt-install and it wants to attach to the console or once it's finished and you start the VM up? One thing: you want to use the Xen 3.2 rpms provided by xen.org for serious production work on CentOS and not the one coming with CentOS. Suggest you read the archives of the list for all tips and caveats. Kai -- Kai Schätzl, Berlin, Germany Get your web at Conactive Internet Services: http://www.conactive.com ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] Need Help with Xen Please
One thing: you want to use the Xen 3.2 rpms provided by xen.org for serious production work on CentOS and not the one coming with CentOS. Suggest you read the archives of the list for all tips and caveats. I've been using the stock Xen (2.6.18) that comes with the latest CentOS 5.2 in production without major issue. At one time I had to restart xend occasionally to be able to properly reboot guest OSes from virt-manager, but even that has stabilized. What specifically is better about 3.2 that you are recommended it over 2.6.18? My experience to date with CentOS is it tends to run the latest, proven stable version of each package, which would make me hesitant to run downloaded packages. As far as virt-manager, use ssh -X or ssh -Y to connect to the DomU then start up virt-manager, this should reflect the GUI back to the originating workstation. Brett ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] Need Help with Xen Please
One thing: you want to use the Xen 3.2 rpms provided by xen.org for serious production work on CentOS and not the one coming with CentOS. Suggest you read the archives of the list for all tips and caveats. When installing the xen.org RPMs, are existing VMs and config files etc dealt with gracefully? ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] Need Help with Xen Please
Michael Hall wrote on Sun, 16 Nov 2008 21:59:35 +0930: On the downloads page at xen.org I can only see source tarballs for 3.3. There are no 3.3 rpms provided by xen.org. The fiels for 3.2 are in the archive: http://www.xen.org/download/dl_32rhel5.html Again: before you use it, skim this group for the few patches you want to install and some other hints. Kai -- Kai Schätzl, Berlin, Germany Get your web at Conactive Internet Services: http://www.conactive.com ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] Need Help with Xen Please
Brett Serkez wrote on Sun, 16 Nov 2008 07:16:45 -0500: I've been using the stock Xen (2.6.18) that comes with the latest CentOS 5.2 in production without major issue. At one time I had to restart xend occasionally to be able to properly reboot guest OSes from virt-manager, but even that has stabilized. What specifically is better about 3.2 that you are recommended it over 2.6.18? AFAIK, you cannot run 32bit guests on 64bit hosts and the HVM support also lacks in the stock CentOS version (which is a 3.0.3/3.1 mix). As I'm not using both I can only reflect what others say. The latest version in 5.2 may also have some patches that Xen 3.2 has and thus works better. You are also getting the xenstore and it's functionality and better networking scripts (the virtual network interface structure changed significantly) with it. There were a lot of improvements from 3.0.3/3.1 to 3.2. My experience to date with CentOS is it tends to run the latest, proven stable version of each package, which would make me hesitant to run downloaded packages. That specific package from xen.org runs really well, but you also have to add two or three patches. Kai -- Kai Schätzl, Berlin, Germany Get your web at Conactive Internet Services: http://www.conactive.com ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] Need Help with Xen Please
Michael Hall wrote on Sun, 16 Nov 2008 21:34:25 +0930: When installing the xen.org RPMs, are existing VMs and config files etc dealt with gracefully? yes. Kai -- Kai Schätzl, Berlin, Germany Get your web at Conactive Internet Services: http://www.conactive.com ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] Need Help with Xen Please
I was following the tutorial at http://www.howtoforge.com/centos_5.0_xen I was not aware that virt-manager is GUI only. Xend does start and I can do everything listed in the tutorial until I get to the virt-manager part. What command line do you use to create a virtual server with virtsh? I am running as root, so that shouldn't be the issue. The hardware does support virtualization and that is switched on in the BIOS. I just looked at 'man virt-manager', I think it's safe to say it is a GUI-only tool. AFAIK, virsh is a general purpose RedHat virtualisation tool which can manage Xen but will also manage KVM when that goes mainstream. xm on the other hand is a Xen-specific tool. Both can be used to do much the same thing, but are reasonably involved, so your best bet at this stage is 'man virsh' and 'man xm'. Sorry but as I said, I'm a Xen newbie myself and have only used the GUI tool to date. ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
