32 Bit Xen Guest On X86_64 EL5 Node
Oct 18, 2009
Let's make this straight,
I have this vps,which is pending cancellation in a few days.
Hardware Node = EL 5 x86_64,
Vz = Xen
I asked my provider for 32 bit centos, I even rebuilt it, but my "uname --all" still
Quote:
Linux xxx.xxx.com 2.6.18-128.1.10.el5xen #1 SMP Thu May 7 11:07:18 EDT 2009 x86_64 x86_64 x86_64 GNU/Linux
so I opened a ticket asking about the vps arch.
The provider have told me that to run a vps 32 bit guest, what you have to do is (?)
+++++++++++++++++++++++++
yum clean all
echo i686-redhat-linux > /etc/rpm/platform
+++++++++++++++++++++++++
so yum will exclude any x86_64 packages.
The provider has told me also that my "uname" display x86_64 because the hardware node is 64 bit. Is this true ?
I'm no linux or vps guru, but that's doesnt feel right at all.
This has cause me some issues especially with kernel-headers and some program failed to compile.
So, is it possible to run a 32 bit OS as xen guest inside 64 bit node?
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Dec 20, 2008
i386 or x86_64 ?
When i go CentOS website, it have 2 versions.
i386 and x86_64. May i know which version should I download?
Quote:
Dual Core Intel Xeon Processor X3110
2Gb (1 x 2Gb) DDR2 DIMM Memory
1 x 320Gb Serial ATA Hard Drive
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Apr 11, 2015
We have one Cloud Server hardware node that exists only as the backup location for containers and VMs in Cloud Server/PVA (it hosts no virtual servers). Can it also serve as a Backup Server Node?
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Feb 9, 2007
I'm wondering if there are special notes on compiling sever softwares under x86_64 (CentOS 4.4 64bit, Pentium D)? Are there any specific flags for extra optimizations? Or the regular "./configure" will compile things in x86_64 by default?
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Apr 27, 2009
Which CentOS distribution i386 or x86_64 do I need for intel core 2 duo 32bit desktop.
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Oct 28, 2008
if its actually possible to properly run a 32bit guest under a 64 bit xen host.
I'm using hypervm.
64 bit guests work perfectly, no problems.
32bit guests boot, but when i try for example, yum update, it will try and install 64 bit packages and fail.
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Mar 15, 2009
I have been using Linux for the past 3 or so years, either running it for workstations or servers, and now I want to set up a server for Virtualization. I have been doing a fair bit of research about the different ways of doing this, and I have decided to go with KVM. I usually use CentOS, but will have to use Debian to use KVM. I just have a few questions about the best way of setting it up.
We have a pretty powerful server* which we are planning on collocating to a data centre and running web servers from the VMs. Virtualization seems like the best way to allow for simpler administration, and also allow us get the most out of our server's resources.
*Intel Xeon X3230 Quad Core, 8GB Ram, 4x 15k 147gb SAS (RAID 6)
What is the best way to set this up then? I was thinking we could install Debian as the Host/Hypervisor over the whole drive, and give it a 16GB swap partition. Then I guess when the VMs are installed they live on the Debian drive as a file, or do they need their own partitions?
Are the guest OS's capable of using the Host's swap space? Its bad enough losing 16GB as a swap partition to the host OS, but please don't tell me I need to supply the VMs with their own swap partition aswell - im curious as to if the server will ever need to use swap space as it has alot of ram, let alone require extra swap for each VM too?
KVM is still very new, but does anyone know any good books/resources out there? The virtualization books I have seen don't seem to cover KVM, just Xen and others.
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Aug 7, 2008
For all of you who are ordering / have ordered VPS systems, what do you think about having Windows vs Linux available from your provider?
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Sep 9, 2007
I was surprised when hypervm brought in a 64bit guest os. Maybe it's me..but...is this a good idea? Maybe it works fine.. it just does not *seem* like it would.
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Sep 8, 2007
OKay here is the set up:
I have a CENTOS 64bit running, with 1 guest OS (WinXP) in a VMWare Server. I have tried the following: I have 6 public IP's attached to my 1 Ethernet card in the CENTOS host.
Try 1:
The Guest OS is set to use "Bridged" Networking. This allows full use of the internet, in both directions. Not exactly optimal, but it does work. I can reach the Guest via RD, which is a requirement for this client. The guest OS is mainly assigned one of the 6 public IP's (x.x.x.118). The problem with this setup is the Guest OS can not reach the host. For example the host has a mail server on it, and when the Guest tries to reach the host, it times out.
Try 2:
The Guest OS is set up to use "NAT" and gets 192.168.100.128 as its IP via DHCP inside of VMWare. The nat config file for VMWare is set to open port 3389 (RD port). Guest OS can reach the host with out any problem, and can reach the internet with out any problem, however I can not RD in to the Guest OS.
I prefer setup number 2 for all the obvious reasons, but I just can not get my IPTables rules to work. This is what I thought should work, but does not:
iptables -t nat -I PREROUTING -d x.x.x.118 -j DNAT --to-destination=192.168.100.128
iptables -t nat -I POSTROUTING -s 192.168.100.128 -j SNAT --to-source=x.x.x.118
I realize that would have done all traffic, and defeated the benefits of NAT,but since forwarding only 3389 was not working I tried forwarding everything.
Any suggestions?
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Jul 16, 2008
After a yum update on a centos 5.2 box (including an update to the latest version of xen) my guests don't have a network connection anymore (nor windows, nor linux VMs).
The windows VM does see an unknown PCI device (great, no drivers and no internet), of which I guess is the network card seeing there are no other network cards listed in the VM.
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Mar 23, 2007
I've just downloaded Microsoft Virtual PC and the Internet Explorer 6 Application Compatibility VPC Image containing an XP installation for testing sites with IE6 [url].
Everything works fine, I chose VPC Shared Networking (NAT) and I can access the internet from the VPC as well as my Apache development server which runs on the host OS (Win XP) by going to the host's IP address which is [url] in my case. And here I have 2 problems:
1. I want to access [url]on VPC just by typing [url]. I added the following line to the hosts file:
192.168.52.141 localhost
But this doesn't work. Interestingly, any name other than localhost works fine, for example:
192.168.52.141 localhost.localhost
or
192.168.52.141 local
This is not a major problem but I'd prefer localhost. Any ideas how to do that?
2. And the more important issue: on my host OS I have some development sites which I have set up to be accessed by subdomains, for example [url], in httpd.conf:
Code:
<VirtualHost 127.0.0.3>
ServerName perfekt.localhost
DocumentRoot C:wwwperfekt
DirectoryIndex index.php index.html
</VirtualHost>
and in hosts file:
Code:
127.0.0.3 perfekt perfekt.localhost
And now I want to access this site from my VPC too by using subdomains like this! How can I do that? The address 127.0.0.3 seems to be local to the OS and VPC can't see it. I have tried setting other IP addesses in httpd.conf but nothing outside the 127.x.x.x range works on either OS. I suppose I need to make each of my sites to be seen under a different IP from the outside network so that VPC (which is "outside" the host OS) can access them - then I just set up the appropriate subdomain names in VPC hosts file -
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Apr 26, 2009
How do I run a virtual instance of Windows server 2008 on my Linux dedi? Do I need to partition the server and create a VPS for this or can I run it on something like VMware? (Please look at my other thread here [url]t=857377 to learn more about my server, its resources and current config.)
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Since my research shows I **can** do this on Centos 5, the responses that would be most useful to me would be those that focus on how I can do this successfully (even if it seems complicate; I can figure it out with help and/or direction) and what to consider or avoid when creating this virtual guest OS on my Linux dedi.
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Jul 27, 2008
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When trying to install a Paravirtualized guest, I had to use the debootstrap method, but can't get it to boot up.
Quote:
xm create anya_zanet
Using config file "/etc/xen/anya_zanet".
Error: (2, 'Invalid kernel', 'xc_dom_find_loader: no loader found
')
This is the xen configuration:
Code:
kernel = "/boot/vmlinuz-2.6.23.1-42.fc8"
ramdisk = "/boot/initrd-2.6.23.1-42.fc8.img"
builder='linux'
memory = 256
name = "anya_zanet"
vcpus = 1
vif = [ 'bridge=xenbr0' ]
disk = [ 'phy:/dev/System/anya_zanet,hda1,w' , 'phy:/dev/System/anya_zanet,hda2,w' ]
root = "/dev/hda1 ro"
on_poweroff = 'destroy'
on_reboot = 'restart'
on_crash = 'restart'
how to get Ubuntu working on a CentOS / Fedora Core XEN server?
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Nov 7, 2009
i'm a vps provider and i'm using this server for vps host
Code:
Dual CPU Xeon 5420, 24GB Ram, 1TB HDD
24GB of Ram
and now i see the used ram is un normal
Code:
[root@216-19-200-162 ~]# free -m
total used free shared buffers cached
Mem: 24064 23865 199 0 541 19509
-/+ buffers/cache: 3813 20251
Swap: 4094 0 4094
[root@216-18-201-162 ~]#
the free ram us 199 of 24GB!
every time when i reboot the server the used ram back normal but after per hours the issues back again
i have contacted the DC and they say that there is no problem with there hardware
the number of vpses in that node is 7 and all the vps have a limit ram.
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Mar 6, 2009
I want to build a VPS Node using Quad Socket Tyan Motherboards and AMD Opteron 2376 Shanghai 2.3 GHz Processor (Quad Core).
I am in doubt since I notice that some providers (at least two rather big provider which I have account) are using Dual Core AMD Opteron 2212.
Is there any specific reason why those providers is not using 2376 AMD Processors? .. is it because the Dual Core AMD Opteron 2212 supports Virtualization Technology, while the 2376 is not?
I will use Xen Hypervisor, usually I use Intel 54xx Processors but looking for *cheaper* solution , so I am really new in AMD Base Server.
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Oct 22, 2009
I build raid10 for VPS nodes. Now, I will use SAN, so all VPS will be created in SAN. With the host server, I assume that I don't need fast disk array, because all the disk requests have been processed in SAN already?
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Oct 18, 2009
For a quad core processor with 16-32GB RAM and SAS raid 10, would 30 VPS's be a lot?
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Am I just making an uninformed bad assumption? So far, performance on my VPS has been fine.
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Aug 7, 2007
which one do i have to choose?? and why?
my server is P4 3.6GHz HTT with 2GB RAM
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Mar 6, 2009
Well the age old question for virtual servers, would you rather a host put all his eggs into one basket "monster node" or several smaller ones. From a provider standpoint one server is easier to manage than several, although if that one goes down, all your customers do with it. Lower costs for the provider, s/he can then pass the savings along.
Example Package:"2GB Ram Packages, 500GB bandwidth, and 20GB space."
The "EXAMPLE" Specs.
All in one
Max Clients: 126
4U Rackmount,
4 Quad Cores, "16 total cores"
256GB DDR2,
8 600GB SAS 10k,
RAID10
Several Server setup:
Max Clients: 14
1U Rackmounts,
Single Quad Core, "4 cores"
32GB DDR2,
2 300GB SAS 10k,
RAID1
If you could tell me why you picked either or.
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Oct 16, 2009
i have a very high load in my node every time i monitor the load i see load average: 8.19 and some times it's go up to 60 - 80
i'm using this server
Intel Core2Quad Q9650
Ram 8GB
Bandwidth: 10000gb
Hypervm Control Panel
and there is only 6 vpses ....
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Jun 19, 2009
i'm using hypervm/openvz
and i have the main package of ips which i have received from datacenter
i orderd other package ips (13) ips
i have add them to ip pools in hypervm and it didn't working
Note : netmask are different for the first ips and the second ips
when i create vps i can't login and when i ping ip it didn't ping ( requested timed out )
i have one server from softlayer and the other from limestonenetworks
when i order additonal ips from softlayer it works proberly .. now when i orderd those ips from limestonenetworks ; i think it must be modified manually
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Apr 14, 2009
i have node 16 cpu AMD 64 gb ram HDD sas 15 with raid 10 /hypervm + openvz i host 10 vps
my problem when any vps load go over 2 the Node load go to 30 - 40 some time 100 i set CPU UNITS , Number Of CPUS and Cpu Usage for every vps but the load in node is go up
how i can set limit in vps and prevent from effect on load Node?
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Jul 21, 2007
I figure while I am twiddling my thumbs here waiting for my host to tell me what the heck happened for the second time in two or three months why they have to do an entire VPS hard restart, which of course causes another hour of fck delays, that I'd ask some of the more skilled and experience folks here, how?
Just before it happened, as I was watching, the load shotup over 1, 2, 4, 20, 30 boom. (I opened a ticket at 4)
Shouldn't virtuozzo always guarantee a certain amount of cpu and bandwidth to the node root? Why do they have to hard reboot and not access it directly and stop the badly behaving vps? Better yet, why isn't the badly behaving vps stopped automatically by virtuozzo?
(oh and am I an idiot for putting up with over two hours of downtime?)
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Sep 22, 2009
I'm reseller vps, and now i decided to run own node, and sell vps, i choosed VDSMANAGER control panel, because virtuzzo is expensive.
Please help me to choose best options to run best and quality node,
VDSManager or VEportal ? (good optios&security&support&...)
XEN or OPENVZ ? (uutil now OPENVZ best for run static and dynamic site, but on xen can be run vpn & shoutcast & windows & linux & ...)
RAM GB ?
CPU ?
Hard ?
can i use load balancing for vps node ?
how many vps can be run on this node ?
Ex:
VDSmanager
XEN
Core2Quad Q9300
8 GB RAM
500 GB HDD
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I want to know if there is a set of tools or a linux distro that I can use to create several Virtual Machines and make them use up all their allocated Memory/CPU to the max to see how much the VPS Node will hold.
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Jun 29, 2009
I had 3 IP pools in HyperVM node. I removed (deleted) 2 pools completely because I had an error trying to create a VPS, told me the IP was being used by someone else. So I deleted the pools completely and I see they still ping. I did a tracert and the IPs come to my server so i know nobody else is using them or that they were assigned to somone else. I rebooted the server and while it was in the process I tried to ping the ips and they didn't respond. When node came up, the ips started pinging again. How can I manually remove the IPs so that my server doesn't respond to the pings and I can add them to the pool and use them correctly.
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May 18, 2009
My main node load average is:
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Apr 9, 2009
My VPS wen't down around 9am (Pacific) this morning, send a ticket in and have not heard anything back. Trying to start it from HyperVM results in:
Alert: no_kernel_support_for_openvz_check_if_right_kernel
Not sure if this is an issue on my side or on the entire node, haven't seen any threads regarding it yet so thought I'd make one. It's been about 4 hours now and my ticket hasen't even been updated yet. Just wondering whats going on...
Ryans usually been on top of everything whenever something happened so I'm going to wait a few more hours before calling them.
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Apr 30, 2008
I mistakenly ran ELS script [url]inside the NODE in root mode instead of inside the vps container I was intending to run the script in, and everything basically stopped working - even after a hard reboot.
No vps's load, no sites work. The vzagent is not pinging. Cannot connect via VZMC as a result.
Quote:
The following error(s) were detected:
Code
Description
1
Most likely your service Virtual Private Server is down or you have entered invalid host address.
I stopped the ELS script at the mytop install yes/no step. I selected yes for all previous install options EXCLUDING apf and bfd. I did a yes on sysctl.conf hardening, disable register globals, chmod dangerous file folder (which probably caused the problem).
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