similar to: best practices in using shared storage for XEN Virtual Machines and auto-failover?

Hi all, Can anyone pleas tell me what would be best practice to use shared storage with virtual machines, especially when it involved high availability / automated failover between 2 XEN servers? i.e. if I setup 2x identical XEN servers, each with say 16GB RAM, 4x 1GB NIC''s, etc. Then I need the xen domU''s to auto failover between the 2 servers if either goes down (hardware

Hi all, Is it possible to reload the dom0 / host node's kernel with a newer one, without rebooting the server? I know kexec can do something like this for security patches, but I don't know much about kexec, and I don't want to mess up a production server either. So, has anyone done something like this before? I need to load a new kernel for one of the domU's iptables to work, but

Hi all, Can anyone please tell me, from experience, if it's possible to upgrade the hard drives in a RAID 10 system from 250GB HDD's to 500GB / 750GB HDD's, while the server is running? The server runs CentOS 5.5 x64. Our hardware vendors simply always say no, so we never actually tried doing this, and when a client needed an upgrade like this we had to build a new server with the

Hi, Does anyone know how to configure Postfix to use SMTP authentication on a relay host? i.e. I have a Linux server, running PostFix on an ADSL line with a dynamic IP. Thus I can't just send out emails from this server but need to relay it via our ISP's SMTP server, which is very unreliable. Now I want to relay the email via another SMTP server where a user account with the same domain

Hi, Does anyone know if "Red Hat Store" will be available in CentOS? Have a look here: http://www.redhat.com/products/storage-server/ I'm not referring to the "Red Hat Cluster Suite" which is already available. -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Cell: 082 554 7532 Fax: 086 268 8492

Hi, I would like to get some input from people who have used these options for mounting a remote server to a local server. Basically, I need to replicate / backup data from one server to another, but over the internet (i.e. insecure channels) Currently we have been mounting an SMB share over SSH, but it's got it's own set of problems. And I don't know if this is optimal, or if I

Hi all I hope anyone can help me with this. I'm trying to get vmware to play along nicely on CentOS 5.1 x64, but I get errors when I try and start a vmx image, or list them. This the the error: [root at backup vmware-mui-distrib]# vmware-cmd -l Use of uninitialized value in string eq at /usr/lib64/perl5/site_perl/5.8.8/x86_64-linux-thread-multi/VMware/VmPerl.pm line 114.

Hi all If I do a "dig mydomain.co.za" from a Linux server, how do I know which DNS nameserver returns the queries? I seem to have a faulty DNS server, but can't see which one, so I want to find out which nameserver (if there's 4 - ns1.myserver, ns2.myserver, ns3.myserver & ns4.myserver) returns the queries? -- Kind Regards Rudi Ahlers CEO, SoftDux Web:

Hi all, I need to setup a real bare minimum CentOS Virtual Machine, but with normal internet / network access. i.e. I need SSH, Mutt, Links, lynx, ping, tracert, dig, iptables, etc. Does anyone know where (if?) I can get a list of applications which gets installed with CentOS 6 if every option is deselected in the installer so that I can see what I can remove which isn't really necessary

Hi, I want to setup a central installation server, but haven't done this before, so I want to find out what would be best practices for this? The server I have already runs as a central repo, which is updated from one or our local centos mirrors, and the other CentOS servers (both i386 & x64), as well as CentOS VPS's get their updates from this server. But, now I want to allow a

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

You can register on this site if you use linux on your desktop, to prove that we have at least more than 1% market share today :-) http://www.dudalibre.com/gnulinuxcounter?lang=en -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532

Hi all, Has anyone managed to get CentOS 6 domU (i.e. guest) working on a Debian 6 do0? Both OS''s are 32bit and I''m running XEN 4.0.1 with HVM support. A CentOS 5.6 domU works fine on this very same server though. When I start CentOS 6, I get the following error: newusaxen:~# xm create -c /xen/genocide.cfg Using config file "/xen/genocide.cfg". xenconsole: Could

Hi, Does anyone know of a stable / working "2way authentication" system for SSH, and even web authentication services? Most of the banks in South Africa have a system that, when you want to make a payment, they send you an SMS and you need to verify the action with a secret code which was SMS'd to you. gmail also has this. Does anyone know of a "universal" plugin /

Hi all, I'm just curios and would like some input from the community on this one. We're busy budgeting for a couple of new servers and I thought it would be good to try out the Core i7 CPU's, but see the majority of them don't offer VT-d, but just VT-x. Looking at the LGA1366 range, only the "Intel lga1366 i7 980XE" (from the list of what our suppliers stock) have VT-d,

Hi All, I recently got some IBM Xseries 335 servers 2nd hand, and noticed they don't have any graphics card. Some google searched indicate they only have an uplink port, which you could connect to another (other model) IBM server and use that as the head node. But, I don't have one available. It has 2x GB NIC's, and what looks like a management port, but I can't figure out how to

Hi all, Has anyone seen something like this before: I want to use a laptop as a KVM console. Basically when a technician goes to one of our datacentres, or clients he has to look for a free LCD, keyboard & mouse to connect to a server (no network access, reinstall, troubleshoot failed kernel / HDD, etc). And then hopefully there's an open power socker in that cabinet. So I'm

Hi all I've been thinking about using CentOS on a Dell R200 server and turn it into a firewall / network monitor / traffic shaper in our datacentre, instead of using a dedicated firewall device. One of the devices that I have been looking at, with my limited budget, is the D-Link DFL 860 - http://www.netdefend.eu/Product.aspx?m=15&ref=DFL-860 It provides AV, SPI, VPN, DOS, P2P, etc

Hi Where can I get documentation for Xen3.2? I see the Xen site only has for Xen 3.0 -- 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 stugg _______________________________________________ Xen-users mailing list

On Mon, Jan 10, 2011 at 12:08 PM, Rudi Ahlers <Rudi at softdux.com> wrote: > On Mon, Jan 10, 2011 at 11:49 AM, compdoc <compdoc at hotrodpc.com> wrote: >> I love realtek - the resources they use tend not to conflict with other >> cards or hardware, they don't use much cpu time, the drivers are mature, and >> they don't cost much. What could be better? There