Xen users - Jun 2008 - Re: unable to access Linux HVM via xm console - Couldnot read tty from store: No such file or directory

HVM = fully virtualized.  The question is, why are you using fully virtualized
domUs?  Why not paravirtualized (PV)?
>>> On 2008/06/16 at 16:07, Rudi Ahlers <Rudi@SoftDux.com> wrote:
Itamar - IspBrasil wrote:
> why you''re using hvm ? its slow
>
>
>
> Rudi Ahlers wrote:
>> Hi all
>>
>> I''m running CentOS 5.1 x64 + Xen 3.0 & I have setup a
CentOS 5.1 x64
>> domU as a HMV. For the setup I used VNC, but I would prefer to be 
>> able to access it via "xm console cPanel" via SSH directly.
>>
>> Here''s the output cPanel HVM:
>>
>> [root@pc-00059 ~]# more /etc/xen/cPanel
>> name = "cPanel"
>> uuid = "ff940501-507d-04ca-e590-831e79ba0397"
>> maxmem = 6144
>> memory = 6144
>> vcpus = 2
>> builder = "hvm"
>> kernel = "/usr/lib/xen/boot/hvmloader"
>> boot = "c"
>> pae = 1
>> acpi = 0
>> apic = 0
>> on_poweroff = "destroy"
>> on_reboot = "restart"
>> on_crash = "restart"
>> device_model = "/usr/lib64/xen/bin/qemu-dm"
>> sdl = 0
>> vnc = 0
>> vncunused = 2
>> #disk = [ 
>>
"phy:/dev/data/cPanel,hda,w","file:/data/storage/CentOS-5.1-x86_64-bin-1of7.iso,ioemu:hdc:cdrom,r"
>> ]
>> disk = [ "phy:/dev/data/cPanel,hda,w" ]
>> vif = [ "mac=00:16:3e:4e:9b:48,bridge=xenbr0,type=ioemu" ]
>> serial = "pty"
>> usb = 1
>> usbdevice = ''tablet''
>>
>>
>> When I try and connect to it via console, I get the following:
>> [root@pc-00059 ~]# xm console cPanel
>> xenconsole: Could not read tty from store: No such file or directory
>> [root@pc-00059 ~]#
>>
>>
>>
>> Reading through all the email archives, I found a few similar 
>> problems, but the suggested fixes doesn''t help. Does anyone
know how
>> to get xm console to work for HVM type domU''s ?
>>
>>
>
>
>
mmm, now that I think of it. I setup fully virtualized hosts, not HVM - 
my bad.....

-- 

Kind Regards
Rudi Ahlers
CEO, SoftDux

Web:   http://www.SoftDux.com 
Check out my technical blog, http://blog.softdux.com for Linux or other
technical stuff, or visit http://www.WebHostingTalk.co.za for Web Hosting stuff





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Nick Couchman wrote:
> HVM = fully virtualized.  The question is, why are you using fully 
> virtualized domUs?  Why not paravirtualized (PV)?
>
> >>> On 2008/06/16 at 16:07, Rudi Ahlers <Rudi@SoftDux.com>
wrote:
> Itamar - IspBrasil wrote:
> > why you''re using hvm ? its slow
> >
> >
> >
> > Rudi Ahlers wrote:
> >> Hi all
> >>
> >> I''m running CentOS 5.1 x64 + Xen 3.0 & I have setup a
CentOS 5.1 x64
> >> domU as a HMV. For the setup I used VNC, but I would prefer to be
> >> able to access it via "xm console cPanel" via SSH
directly.
> >>
> >> Here''s the output cPanel HVM:
> >>
> >> [root@pc-00059 ~]# more /etc/xen/cPanel
> >> name = "cPanel"
> >> uuid = "ff940501-507d-04ca-e590-831e79ba0397"
> >> maxmem = 6144
> >> memory = 6144
> >> vcpus = 2
> >> builder = "hvm"
> >> kernel = "/usr/lib/xen/boot/hvmloader"
> >> boot = "c"
> >> pae = 1
> >> acpi = 0
> >> apic = 0
> >> on_poweroff = "destroy"
> >> on_reboot = "restart"
> >> on_crash = "restart"
> >> device_model = "/usr/lib64/xen/bin/qemu-dm"
> >> sdl = 0
> >> vnc = 0
> >> vncunused = 2
> >> #disk = [
> >> 
>
"phy:/dev/data/cPanel,hda,w","file:/data/storage/CentOS-5.1-x86_64-bin-1of7.iso,ioemu:hdc:cdrom,r"
>
> >> ]
> >> disk = [ "phy:/dev/data/cPanel,hda,w" ]
> >> vif = [ "mac=00:16:3e:4e:9b:48,bridge=xenbr0,type=ioemu"
]
> >> serial = "pty"
> >> usb = 1
> >> usbdevice = ''tablet''
> >>
> >>
> >> When I try and connect to it via console, I get the following:
> >> [root@pc-00059 ~]# xm console cPanel
> >> xenconsole: Could not read tty from store: No such file or
directory
> >> [root@pc-00059 ~]#
> >>
> >>
> >>
> >> Reading through all the email archives, I found a few similar
> >> problems, but the suggested fixes doesn''t help. Does
anyone know how
> >> to get xm console to work for HVM type domU''s ?
> >>
> >>
> >
> >
> >
> mmm, now that I think of it. I setup fully virtualized hosts, not HVM -
> my bad.....
>
> -- 
>
ok, so I had the right words :)

as far as I understand, HVM is the only way to get Windows, or rather 
unmodified OS'',  installed onto Linux, right? Or is there another way?
I
setup Windows like this, and simply copied the Windows HMV 
(/etc/xen/windows2003) to a new one for Linux (/etc/xen/cPanel) and 
installed Linux onto it.

Should I rather have used a non-virtualized (is this referred to as 
paravirtualized ?) installation? But would I then be able to install say 
Ubuntu onto CentOS as a PV? Doesn''t Ubuntu use a different kernel than 
the Red Hat family (Red Hat, Fedora Core, CentOS)?

-- 

Kind Regards
Rudi Ahlers
CEO, SoftDux

Web:   http://www.SoftDux.com
Check out my technical blog, http://blog.softdux.com for Linux or other
technical stuff, or visit http://www.WebHostingTalk.co.za for Web Hosting stuff


_______________________________________________
Xen-users mailing list
Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users

Yes, HVM - a hardware virtual machine - is the way to run unmodified guest O/Ss
on Xen.  If your O/S has a modified kernel available, though, you should use
that.  CentOS 5.1 definitely has a PV (modified) kernel available, so is there
some reason you want to run your CentOS 5.1 domU in an HVM (unmodified), or
maybe you should switch over to the modified kernel for that domU?
>>> On 2008/06/16 at 22:20, Rudi Ahlers <Rudi@SoftDux.com> wrote:
Nick Couchman wrote:
> HVM = fully virtualized.  The question is, why are you using fully 
> virtualized domUs?  Why not paravirtualized (PV)?
>
> >>> On 2008/06/16 at 16:07, Rudi Ahlers <Rudi@SoftDux.com>
wrote:
> Itamar - IspBrasil wrote:
> > why you''re using hvm ? its slow
> >
> >
> >
> > Rudi Ahlers wrote:
> >> Hi all
> >>
> >> I''m running CentOS 5.1 x64 + Xen 3.0 & I have setup a
CentOS 5.1 x64
> >> domU as a HMV. For the setup I used VNC, but I would prefer to be
> >> able to access it via "xm console cPanel" via SSH
directly.
> >>
> >> Here''s the output cPanel HVM:
> >>
> >> [root@pc-00059 ~]# more /etc/xen/cPanel
> >> name = "cPanel"
> >> uuid = "ff940501-507d-04ca-e590-831e79ba0397"
> >> maxmem = 6144
> >> memory = 6144
> >> vcpus = 2
> >> builder = "hvm"
> >> kernel = "/usr/lib/xen/boot/hvmloader"
> >> boot = "c"
> >> pae = 1
> >> acpi = 0
> >> apic = 0
> >> on_poweroff = "destroy"
> >> on_reboot = "restart"
> >> on_crash = "restart"
> >> device_model = "/usr/lib64/xen/bin/qemu-dm"
> >> sdl = 0
> >> vnc = 0
> >> vncunused = 2
> >> #disk = [
> >> 
>
"phy:/dev/data/cPanel,hda,w","file:/data/storage/CentOS-5.1-x86_64-bin-1of7.iso,ioemu:hdc:cdrom,r"
>
> >> ]
> >> disk = [ "phy:/dev/data/cPanel,hda,w" ]
> >> vif = [ "mac=00:16:3e:4e:9b:48,bridge=xenbr0,type=ioemu"
]
> >> serial = "pty"
> >> usb = 1
> >> usbdevice = ''tablet''
> >>
> >>
> >> When I try and connect to it via console, I get the following:
> >> [root@pc-00059 ~]# xm console cPanel
> >> xenconsole: Could not read tty from store: No such file or
directory
> >> [root@pc-00059 ~]#
> >>
> >>
> >>
> >> Reading through all the email archives, I found a few similar
> >> problems, but the suggested fixes doesn''t help. Does
anyone know how
> >> to get xm console to work for HVM type domU''s ?
> >>
> >>
> >
> >
> >
> mmm, now that I think of it. I setup fully virtualized hosts, not HVM -
> my bad.....
>
> -- 
>
ok, so I had the right words :)

as far as I understand, HVM is the only way to get Windows, or rather 
unmodified OS'',  installed onto Linux, right? Or is there another way?
I
setup Windows like this, and simply copied the Windows HMV 
(/etc/xen/windows2003) to a new one for Linux (/etc/xen/cPanel) and 
installed Linux onto it.

Should I rather have used a non-virtualized (is this referred to as 
paravirtualized ?) installation? But would I then be able to install say 
Ubuntu onto CentOS as a PV? Doesn''t Ubuntu use a different kernel than 
the Red Hat family (Red Hat, Fedora Core, CentOS)?

-- 

Kind Regards
Rudi Ahlers
CEO, SoftDux

Web:   http://www.SoftDux.com 
Check out my technical blog, http://blog.softdux.com for Linux or other
technical stuff, or visit http://www.WebHostingTalk.co.za for Web Hosting stuff



This e-mail may contain confidential and privileged material for the sole use of
the intended recipient.  If this email is not intended for you, or you are not
responsible for the delivery of this message to the intended recipient, please
note that this message may contain SEAKR Engineering (SEAKR)
Privileged/Proprietary Information.  In such a case, you are strictly prohibited
from downloading, photocopying, distributing or otherwise using this message,
its contents or attachments in any way.  If you have received this message in
error, please notify us immediately by replying to this e-mail and delete the
message from your mailbox.  Information contained in this message that does not
relate to the business of SEAKR is neither endorsed by nor attributable to
SEAKR.


_______________________________________________
Xen-users mailing list
Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users

Nick Couchman wrote:
> Yes, HVM - a hardware virtual machine - is the way to run unmodified 
> guest O/Ss on Xen.  If your O/S has a modified kernel available, 
> though, you should use that.  CentOS 5.1 definitely has a PV 
> (modified) kernel available, so is there some reason you want to run 
> your CentOS 5.1 domU in an HVM (unmodified), or maybe you should 
> switch over to the modified kernel for that domU?
>
> >>> On 2008/06/16 at 22:20, Rudi Ahlers <Rudi@SoftDux.com>
wrote:
> Nick Couchman wrote:
> > HVM = fully virtualized.  The question is, why are you using fully
> > virtualized domUs?  Why not paravirtualized (PV)?
> >
> > >>> On 2008/06/16 at 16:07, Rudi Ahlers
<Rudi@SoftDux.com> wrote:
> > Itamar - IspBrasil wrote:
> > > why you''re using hvm ? its slow
> > >
> > >
> > >
> > > Rudi Ahlers wrote:
> > >> Hi all
> > >>
> > >> I''m running CentOS 5.1 x64 + Xen 3.0 & I have
setup a CentOS 5.1 x64
> > >> domU as a HMV. For the setup I used VNC, but I would prefer
to be
> > >> able to access it via "xm console cPanel" via SSH
directly.
> > >>
> > >> Here''s the output cPanel HVM:
> > >>
> > >> [root@pc-00059 ~]# more /etc/xen/cPanel
> > >> name = "cPanel"
> > >> uuid = "ff940501-507d-04ca-e590-831e79ba0397"
> > >> maxmem = 6144
> > >> memory = 6144
> > >> vcpus = 2
> > >> builder = "hvm"
> > >> kernel = "/usr/lib/xen/boot/hvmloader"
> > >> boot = "c"
> > >> pae = 1
> > >> acpi = 0
> > >> apic = 0
> > >> on_poweroff = "destroy"
> > >> on_reboot = "restart"
> > >> on_crash = "restart"
> > >> device_model = "/usr/lib64/xen/bin/qemu-dm"
> > >> sdl = 0
> > >> vnc = 0
> > >> vncunused = 2
> > >> #disk = [
> > >>
> > 
>
"phy:/dev/data/cPanel,hda,w","file:/data/storage/CentOS-5.1-x86_64-bin-1of7.iso,ioemu:hdc:cdrom,r"
>
> >
> > >> ]
> > >> disk = [ "phy:/dev/data/cPanel,hda,w" ]
> > >> vif = [
"mac=00:16:3e:4e:9b:48,bridge=xenbr0,type=ioemu" ]
> > >> serial = "pty"
> > >> usb = 1
> > >> usbdevice = ''tablet''
> > >>
> > >>
> > >> When I try and connect to it via console, I get the
following:
> > >> [root@pc-00059 ~]# xm console cPanel
> > >> xenconsole: Could not read tty from store: No such file or
directory
> > >> [root@pc-00059 ~]#
> > >>
> > >>
> > >>
> > >> Reading through all the email archives, I found a few similar
> > >> problems, but the suggested fixes doesn''t help. Does
anyone know how
> > >> to get xm console to work for HVM type domU''s ?
> > >>
> > >>
> > >
> > >
> > >
> > mmm, now that I think of it. I setup fully virtualized hosts, not HVM
-
> > my bad.....
> >
> > --
> >
>
> ok, so I had the right words :)
>
> as far as I understand, HVM is the only way to get Windows, or rather
> unmodified OS'',  installed onto Linux, right? Or is there another
way? I
> setup Windows like this, and simply copied the Windows HMV
> (/etc/xen/windows2003) to a new one for Linux (/etc/xen/cPanel) and
> installed Linux onto it.
>
> Should I rather have used a non-virtualized (is this referred to as
> paravirtualized ?) installation? But would I then be able to install say
> Ubuntu onto CentOS as a PV? Doesn''t Ubuntu use a different kernel
than
> the Red Hat family (Red Hat, Fedora Core, CentOS)?
>
> -- 
>
No, no reason why I want to run CentOS unmodified. It was just easy to 
setup :) I copied the one HVM config file to a new one and it was up. So 
I guess I''ll setup a new paravirtualized centos then :)

-- 

Kind Regards
Rudi Ahlers
CEO, SoftDux

Web:   http://www.SoftDux.com
Check out my technical blog, http://blog.softdux.com for Linux or other
technical stuff, or visit http://www.WebHostingTalk.co.za for Web Hosting stuff



_______________________________________________
Xen-users mailing list
Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users

I highly recommend the Xen graphical management tools - Google virt-manager and
virtinstall - these tools help out a lot in trying to get domUs installed and
are able for a lot of them to choose PV or HVM depending on whether a modified
kernel is available or not.

-Nick
>>> On Tue, Jun 17, 2008 at  9:39 AM, Rudi Ahlers
<Rudi@SoftDux.com> wrote:
Nick Couchman wrote:
> Yes, HVM - a hardware virtual machine - is the way to run unmodified
> guest O/Ss on Xen.  If your O/S has a modified kernel available,
> though, you should use that.  CentOS 5.1 definitely has a PV
> (modified) kernel available, so is there some reason you want to run
> your CentOS 5.1 domU in an HVM (unmodified), or maybe you should
> switch over to the modified kernel for that domU?
>
> >>> On 2008/06/16 at 22:20, Rudi Ahlers <Rudi@SoftDux.com>
wrote:
> Nick Couchman wrote:
> > HVM = fully virtualized.  The question is, why are you using fully
> > virtualized domUs?  Why not paravirtualized (PV)?
> >
> > >>> On 2008/06/16 at 16:07, Rudi Ahlers
<Rudi@SoftDux.com> wrote:
> > Itamar - IspBrasil wrote:
> > > why you''re using hvm ? its slow
> > >
> > >
> > >
> > > Rudi Ahlers wrote:
> > >> Hi all
> > >>
> > >> I''m running CentOS 5.1 x64 + Xen 3.0 & I have
setup a CentOS 5.1 x64
> > >> domU as a HMV. For the setup I used VNC, but I would prefer
to be
> > >> able to access it via "xm console cPanel" via SSH
directly.
> > >>
> > >> Here''s the output cPanel HVM:
> > >>
> > >> [root@pc-00059 ~]# more /etc/xen/cPanel
> > >> name = "cPanel"
> > >> uuid = "ff940501-507d-04ca-e590-831e79ba0397"
> > >> maxmem = 6144
> > >> memory = 6144
> > >> vcpus = 2
> > >> builder = "hvm"
> > >> kernel = "/usr/lib/xen/boot/hvmloader"
> > >> boot = "c"
> > >> pae = 1
> > >> acpi = 0
> > >> apic = 0
> > >> on_poweroff = "destroy"
> > >> on_reboot = "restart"
> > >> on_crash = "restart"
> > >> device_model = "/usr/lib64/xen/bin/qemu-dm"
> > >> sdl = 0
> > >> vnc = 0
> > >> vncunused = 2
> > >> #disk = [
> > >>
> >
>
"phy:/dev/data/cPanel,hda,w","file:/data/storage/CentOS-5.1-x86_64-bin-1of7.iso,ioemu:hdc:cdrom,r"
>
> >
> > >> ]
> > >> disk = [ "phy:/dev/data/cPanel,hda,w" ]
> > >> vif = [
"mac=00:16:3e:4e:9b:48,bridge=xenbr0,type=ioemu" ]
> > >> serial = "pty"
> > >> usb = 1
> > >> usbdevice = ''tablet''
> > >>
> > >>
> > >> When I try and connect to it via console, I get the
following:
> > >> [root@pc-00059 ~]# xm console cPanel
> > >> xenconsole: Could not read tty from store: No such file or
directory
> > >> [root@pc-00059 ~]#
> > >>
> > >>
> > >>
> > >> Reading through all the email archives, I found a few similar
> > >> problems, but the suggested fixes doesn''t help. Does
anyone know how
> > >> to get xm console to work for HVM type domU''s ?
> > >>
> > >>
> > >
> > >
> > >
> > mmm, now that I think of it. I setup fully virtualized hosts, not HVM
-
> > my bad.....
> >
> > --
> >
>
> ok, so I had the right words :)
>
> as far as I understand, HVM is the only way to get Windows, or rather
> unmodified OS'',  installed onto Linux, right? Or is there another
way? I
> setup Windows like this, and simply copied the Windows HMV
> (/etc/xen/windows2003) to a new one for Linux (/etc/xen/cPanel) and
> installed Linux onto it.
>
> Should I rather have used a non-virtualized (is this referred to as
> paravirtualized ?) installation? But would I then be able to install say
> Ubuntu onto CentOS as a PV? Doesn''t Ubuntu use a different kernel
than
> the Red Hat family (Red Hat, Fedora Core, CentOS)?
>
> --
>
No, no reason why I want to run CentOS unmodified. It was just easy to
setup :) I copied the one HVM config file to a new one and it was up. So
I guess I''ll setup a new paravirtualized centos then :)

--

Kind Regards
Rudi Ahlers
CEO, SoftDux

Web:   http://www.SoftDux.com
Check out my technical blog, http://blog.softdux.com for Linux or other
technical stuff, or visit http://www.WebHostingTalk.co.za for Web Hosting stuff





This e-mail may contain confidential and privileged material for the sole use of
the intended recipient.  If this email is not intended for you, or you are not
responsible for the delivery of this message to the intended recipient, please
note that this message may contain SEAKR Engineering (SEAKR)
Privileged/Proprietary Information.  In such a case, you are strictly prohibited
from downloading, photocopying, distributing or otherwise using this message,
its contents or attachments in any way.  If you have received this message in
error, please notify us immediately by replying to this e-mail and delete the
message from your mailbox.  Information contained in this message that does not
relate to the business of SEAKR is neither endorsed by nor attributable to
SEAKR.


_______________________________________________
Xen-users mailing list
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