First we set up the 2nd disk by copying the partition tables whilst enabling a degraded raid on it, then copy data over with custom initrd. Assume, that weve some data saved to logical volume, which is created with raid 10. May 09, 2019 the xenserver host computer is dedicated entirely to the task of running xenserver hosting vms and is not used for other applications. Xenserver uses this partition for temporary space during upgrades devsda3.
Xenserver release notes cover new features in xenserver 7. To learn more and to read the entire article at its source, please refer to the following page, configure xenserver 5. Jul 29, 2015 the alternative to this problem is configuring the system in software raid1. Cumulative update 2, released 12 december 2018, is the most recent update to the 7.
Asked by cmendoza 0 points na posted on 03062012 for those who have a dedicated server with two hdd, the common idea is to put them in a raid via software, but when you use it with a xen server, a problem will occur. When configuring a physical server in raid1 an exacto copy is created of the existing information in the hard disc to other with the same capacity. The disk io performance loss in xen vms xenserver 5. Honestly, you are wasting your time with software raid 5, unless this is just for a home lab to educate yourself. How to install mdadm to xenserver 7 petr benas bl0g. Historically xenserver does not support software raid outthebox, and this is unchanged in the latest 6. Having said that, this post contains lots of info on getting xenserver 7 to use mdadm based raid in this case, raid 1 which you will have to adapt to raid.
Sep 20, 2016 dear, we are trying to install a new xenserver 7 on a dedicated server. Would quite like to get the rest of the servers onto 7. The esxi is not working with software raid, so i want to switch to proxmox or citrix xenserver. I got one more problem i have built a raid1 on over to disks on a dell s software raid controller. There is experimental support for software raid 1 since the last version. Having said that, this post contains lots of info on getting xenserver 7 to use mdadm based raid in this case, raid 1 which you will have to adapt to raid 5. Minimum two number of disks are allowed to create raid 1, but you can add more disks by using twice as 2, 4, 6, 8. Xenserver doesnt really support fakeraid or software raid. Xenserver is an open source virtualization platform and constitute a good choice for be adopted by developments groups. Advanced micro devices amd sb7x0sb8x0sb9x0 sata controller. That will be many hundreds of dollars and no faster than software raid. The first step is to disable the bios raid and configure the two sata. Once the xenserver host comes up at the top of the installation method, the subsequent modules needed for fakeraid ought to be mechanically loaded. To assemble the array at boot i use those commands in my rc.
All the processing is done by your cpu and is similar to software raid in that regard. Actually we have two disk on that server, so we need to configure him on raid 1. Due to the fact that the standard update is a xenserver installation of the new xenserver with virtual machines preservation, with the loss of all the changes that were made manually on the server installed software, changing adding settings through the console, etc. Instructions for switching to raid 1 for xenserver 6. Someone have installed already that enviroment xen7 raid 1 grub, successfully. To add more disks, your system must have a raid physical adapter hardware card. Install the xenserver host software system with its storage repository over the third disk, the individual one.
For example, a software raid of devhda and devhdb might be accessed through an md device named devmd0. In raid 10, we need minimum of 4 disks, the first 2 disks for raid 0 and other 2 disks for raid 1. Raid, xenserver 93 responses to xenserver with software raid1 installation 6. Upvote if you found this answer helpful or interesting. Yes, idea of raid1 is that one disk is a copy of another, but this is software raid and it based on partitions. To make this work, you need to drives in your system. Stop here and reboot your xenserver box to pick up the new partition changes. I have a spare supermicro laying around, will test the setup on that machine now to see if things are different there.
There are plenty of them in the internet, but the bottom point is this. I have written previously about how to convert citrix xenserver 6. Before you get started, go through the steps to disable gpt. A problem i have encountered is that the xenserver 5. Xenserver documentation xenserver documentation shipped with this release includes. But, i tested it, by shutting down the server and i removed devsda, i fired the server up, but it hungs on the xenserver boot screen with the progress bar.
Here we will use both raid 0 and raid 1 to perform a raid 10 setup with minimum of 4 drives. If you are new to the ltsr program and did not deploy the initial 7. This happens because the initrd tries to activate the raid device inappropriately. Although citrix recommends against using software raid with xenserver due to performance issues, ive had some pretty awful experiences with hardware raid cards over the last few years.
The sr raid set is on a separate intel raid adapter with separate sas drives. Xenserver 7 raid1 mdadm after install running system. If you want to update, try it on a box that has nothing important on it first. I wish that i had his name so i could give him credit but its not here on the stuff i printed out.
Raid 1 for two drives mdadm create devmd0 l 1 n 2 devsda3 devsdb3 raid 10 for four drives mdadm create devmd0 l 10 n 4 devsda3 devsdb3 devsdc3 devsdd3. The installation of any third party software directly on the xenserver host i. Set up one raid during install and then create the other one postinstall from the console. I used the notes from some guy on the citrix forums. Sep 14, 2009 xenserver doesnt really support fakeraid or software raid. Following this guide i was able to successfully migrate my running xenserver installation to a software based raid 1, with a few tweaks. Sep 20, 2016 someone here has already installer xenserver 7. You need not rewrite mbr again after rebuild arrays. This new landing page provides links to citrix hypervisor content and resources available on and developer. Xenserver 7 and software raid configuration howtoforge linux. Linux software raid is damn good and it beats low end raid controllers and usually matches performance of midend ones. The alternative to this problem is configuring the system in software raid1. Convert xenserver installation to software raid1 technicus.
However their xenserver 7 install is hard raid only but its 7. Import software raid and storage repository on it maybe reinstall software raid. Basically after that we have setup the raid, following that thread its look that there is no official documentation. Download the driver disk directly to the xenserver host to be updated citrix recommends storing it in the tmp directory, or first download the file to an internetconnected computer, and burn the iso image to a cd. Raid 10 is a combination of raid 0 and raid 1 to form a raid 10. I would not assume this would be an issue, since this whole setup is to provide a raid solution so when 1 disks fails, the xenserver still can boot.
I recently did some performance tests for a couple virtualization technologies. If we need to extended the raid group, we must increase the disk by minimum 4 disks. We need to install too, but at this time we are stucked on raid software, mdadm configuration. If the initrd is then regenerated for example, by installing a hotfix, xenserver subsequently fails to boot. Zfs, lvm or any device mapper based solution, md, btrfs.
And as i said in the blog, running software raid is good for a cheap testing box, but for a production box is certainly not a good idea. Especially because i use uefi with nvme ssd i ended up with no raid. On the steps to follow, devsda are used for the disc where the instalation was made and devsdb for the second disc with the same size. We need to replicate the same partition structure across each of your drives and the software raid volume will span the across the third partition on each disk. Use xencenter to access the xenserver hosts console, or log in directly using ssh. Xenserver 7 raid1 mdadm after install running system server. That post also explains an optional adjustment to get a larger root. The second partition is used for backups during a xenserver upgrade.
Ive installed xenserver on a usb device plugged directly in the motherboard, i used two 1t hdd in raid 1 using mdadm for the sr storage repository. Its look like that the only procedure public, on that matters is described on that thread. Feb 16, 2016 raid5 via software no citrix xenserver. Sep 02, 2011 a problem i have encountered is that the xenserver 5. Basically, since xenserver 7 is based on centos 7, you should follow the centos 7 raid conversion guide. In addition, the price of software raid makes it a very desirable solution. Dec 18, 2015 if a disk has a software raid signature, the xenserver activates it during boot. The xenserver host computer is dedicated entirely to the task of running xenserver hosting vms and is not used for other applications. Software volume management evms, lvm and software raid md wrap hardware and other software block devices and give them new names as part of the interface of adding functionality to the storage they manage. Advanced micro devices amd fch sata controller ahci mode sata.
Mark this reply as best answer, if it answered your question. If the host doesnt support software raid, you can use software raid from the guest os. Setting up raid 1 mirroring using two disks in linux part 3. Once the server comes back from the reboot, start up a software raid volume with mdadm. Xenserver quick start guide provides an introduction for new users to the xenserver environment and components. Here were using software raid not a hardware raid, if your system has an inbuilt physical hardware raid card you can access it from its utility. How to configure raid 5 after installing xenserver 7. Jan 06, 2020 a xenserver ltsr is currently available for version 7. This document describes how to install xenserver 6. Xenserver 7 and software raid configuration howtoforge. Dear, we are trying to install a new xenserver 7 on a dedicated server.
1 933 1066 542 1641 1680 800 607 1115 1638 128 473 510 1543 777 429 1412 560 83 885 1016 1187 98 1239 804 438 839 1484 665 169