Displaying 20 results from an estimated 30000 matches similar to: "CentOS 6 KVM guest on CentOS 5 host"
2011 Apr 23
1
KVM, virsh attach-disk problems
Greetings, list!
I hope you forgive cross-posting - I only now found this list.
I am in the process of configuring a KVM stack of about 8 vms. Mostly I
am concerned about performance, as there will be a lot of I/O.
My last problem is this: I try to add a fresh, unformatted disk
partition to a KVM guest. I follow the directions given here:
2010 Jul 21
4
Fsck on mdraid array
Something seems to be wrong with my file systems, and I want to fsck
everything. But I cannot.
The setup consists of 2 hds, carrying 3 raid1 (ext3) file systems (boot,
/, swap). OS is up-to-date CentOS 5.
So I boot from CentOS 5.3 dvd in rescue mode, do not mount the file
systems, and try to run
fsck -y /dev/md0
fsck -y /dev/md1
fsck -y /dev/md2
For each try I get an error message:
2011 Apr 11
1
KVM resources?
Later this week I will have to install a serious KVM setup, and I am
looking for background material.
I found a nice how-to:
http://wiki.centos.org/HowTos/KVM
...but it is probably partly outdated by now.
Then there is a fine virtualization manual:
http://www.centos.org/docs/5/html/5.2/Virtualization/
...but it seems to be only for xen.
I plan to use either CentOS 5.6 or Scientific Linux
2009 Dec 16
5
Old hd, new machine
What should I do to make an existing CentOS (5.4) disc boot up on a new
computer?
I just made on CentOS 5.3 installation on that machine, so I know the
hardware is compatible.
Would it be enough to boot with a DVD in rescue mode, or boot with
another hd, and install grub?
- Jussi
--
Jussi Hirvi * Green Spot
Topeliuksenkatu 15 C * 00250 Helsinki * Finland
Tel. +358 9 493 981 * Mobile +358
2010 Jan 04
2
Sendmail error: auxpropfunc error invalid parameter supplied
I just noticed this error in my messages log after restarting sendmail.
The only change I have made is
1) manual fix in /usr/share/spamassassin/72_active.conf
2) sa-update (several times)
Now the mail is not running ok, my mail queue keeps growing.
Regards,
Jussi Hirvi
2011 Apr 22
2
KVM, virsh attach-disk error
I try to add a fresh, unformatted disk partition to a KVM guest. I
follow the directions given here:
http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5/html-single/Virtualization/index.html#proc-Virtualization-Adding_storage_devices_to_guests-Adding_physical_block_devices_to_virtualized_guests
First I check that the module acpiphp is present on the guest. It is.
On the host I write:
2010 Aug 13
1
Retrieving POP mail from server to server
I need to transfer a client's email inbox from another mail server to
our mail server (Centos 5). This is needed once only (or maybe a couple
of times).
What is the best command-line tool? Fetchmail?
I did this once before, with another tool, but have forgotten.
- Jussi
--
Jussi Hirvi * Green Spot
Topeliuksenkatu 15 C * 00250 Helsinki * Finland
Tel. +358 9 493 981 * Mobile +358 40 771
2010 Oct 30
2
Xen guest not starting automatically
I have a xen system with four guest OS's, (see list below). When I
reboot the host, other guests autostart normally, but mail2 does not. I
have found no explanation for this.
The host and all guests are CentOS 5.5.
[root at farm1 xen]# ls -l /etc/xen/auto
total 0
lrwxrwxrwx 1 root root 8 Dec 11 2009 dawit -> ../dawit
lrwxrwxrwx 1 root root 8 May 5 21:10 mail2 -> ../mail2
lrwxrwxrwx
2011 Mar 31
3
Migrating standalone systems to KVM
A while ago I got great instructions from Pasi for migrating standalone
systems to *xen*. However, now I have decided to use KVM instead, which
raises a new question:
How to migrate a standalone system to *KVM*?
I know a two-step way to do it:
standalone system -> xen pv guest
xen pv guest -> KVM pv guest
I read that xen -> KVM migration is trivially easy.
But is there an easier
2010 Feb 03
1
Changing size of a xen guest filesystem
It should be easy, but I have not yet found a solution. Only some
methods involving use of dd, but that sounds a little scary to me on a
production server.
I wish there would be a command "virt-resize", but no... Maybe
"virt-clone", with the option --file=DISKFILE, could be bended to do this?
- Jussi Hirvi
--
Jussi Hirvi * Green Spot
Topeliuksenkatu 15 C * 00250 Helsinki
2011 Apr 27
2
Where is my qemu command?
KVM virtualization is full of wonders. :-/
I would need to attach an USB disk to a vm, but how?
The command "qemu" would provide a way:
[root at a134-224 yum.repos.d]# man qemu-kvm
> QEMU(1)
> NAME
> qemu-doc - QEMU Emulator User Documentation
>
> SYNOPSIS
> usage: qemu [options] [disk_image]
(...)
> -usbdevice devname
> Add the
2011 Apr 21
1
KVM virt-install on disk image - "no space"
I guess I need the list again.
I try to install my first KVM guest. Here is what I do, and finally,
what I stumble on.
First I created a qcow2 img:
# qemu-img create -f qcow2 /var/lib/libvirt/images/test1.img 15G
And I created a network bridge (not essential here)
To get a text-based install, I followed this how-to:
2010 May 26
1
Xen guest does not autostart
I have a virtual machine stack which was purely Centos 5.4 the last time
I rebooted and experienced this problem: one of the guests does not
start automatically after reboot.
[root at farm1 xen]# pwd
/etc/xen
[root at farm1 xen]# ls -l auto
total 0
lrwxrwxrwx 1 root root 8 Dec 11 17:25 name1 -> ../name1
lrwxrwxrwx 1 root root 8 May 5 21:10 name2 -> ../name2
lrwxrwxrwx 1 root root 8 Nov
2007 Jan 19
2
Installing 4.4 - problem on 386
I tried installing with several options (noacpi noapm; noprobe; noprobe
skipddc noacpi noapm nodma). Always I get the same error.
BUT this is not in fac a CentOS problem at all, because I get the same error
always when I boot from hd (Fedora Core), IF there is a CD in the CD-ROM
drive. (I tried with CentOS 1/4, CentOS 2/4 and a HP printer software CD.)
It must be something with the CD drive!
2008 Aug 21
3
Disk quotas for Sendmail
Hi,
CentOS 5.x, Sendmail 8.13.8.
I would like to start using disk quotas on my Sendmail server, and optimally
they should be configurable by user or group. How can this be done? (I tried
to google, but no success.)
- Jussi
--
Jussi Hirvi * Green Spot
Topeliuksenkatu 15 C * 00250 Helsinki * Finland
Tel. & fax +358 9 493 981 * Mobile +358 40 771 2098 (only sms)
jussi.hirvi at greenspot.fi *
2008 Aug 15
1
Hard disk, format, filesystem
Ok, I give up... I have to ask. This is CentOS 5.
I switched one of my raid1 disks, and I already thought I had succeeded. But
now it seems that something is very wrong with the first partition on the
new disk. Luckily my system is fully bootable with the other disk.
Here's some info. The new disk is sdb.
// I removed all partitions with parted, and created the first one again.
// parted
2010 Oct 12
2
Openwebmail emergency (Perl)
After system update yesterday, Openwebmail now gives an error:
> Undefined subroutine &Compress::Zlib::memGzip called at /var/www/cgi-bin/openwebmail/shares/ow-shared.pl line 1175.
I tried to do
perl -MCPAN -e shell
install Compress::Zlib
But it says Compress::Zlib is up-to-date. What do to?? I cannot find an
answer by googling.
- Jussi
--
Jussi Hirvi * Green Spot
Topeliuksenkatu 15
2011 Mar 29
4
VMware vSphere Hypervisor (free ESXi) and mdraid
Can I combine VMWare ESXi (free version) virtualization and CentOS
mdraid level 1? Any pointers how to do it? I never used VMWare before.
- Jussi
--
Jussi Hirvi * Green Spot
Topeliuksenkatu 15 C * 00250 Helsinki * Finland
Tel. +358 9 493 981 * Mobile +358 40 771 2098 (only sms)
jussi.hirvi at greenspot.fi * http://www.greenspot.fi
2010 Jul 02
1
File sharing solution
I would like to offer my isp clients a solution for sharing (big) files,
basically on one-to-one basis. This is how I imagine it:
- an anonymous or registered user can upload a file
- on response (s)he will get a file-specific (or batch-specific)
username/password
- (s)he can send a link and un/pw by email
- the receiver can download the file
- the file will be automatically deleted from the
2008 Oct 30
3
[OT] List of all email users
This is not CentOS-specific, hence OT.
I need a list of all email users on my system (there are hundreds of them).
The list could be extracted from /etc/aliases and the virtusertable.
Does anyone know of a script that would do this automatically? It would have
to
- exclude commented-out lines (of course)
- exclude duplicates
- produce a list of usernames (or maybe unresolved email addresses for