DRBD is a linux kernel module designed to replicate data over a network. Linux users frequently use DRBD to replicate VMs in order to minimize downtime and eliminate data-loss durin


Für DRBD 8.4 raten die DRBD-Entwickler bereits für die Mehrzahl der Fälle von entsprechenden Setups ab; der einzige legitime Einsatzzweck ist demnach der kurzzeitige parallele Betrieb im Dual-Primary-Modus zum Zwecke der Live-Migration virtueller Maschinen. DRBD is a linux kernel module designed to replicate data over a network. Linux users frequently use DRBD to replicate VMs in order to minimize downtime and eliminate data-loss during server . Xen + DRBD == Live migration! Time to introduce Xen and DRBD to eachother. First we’ll enable live migration on our resource by adding this to the resource config /etc/drbd.d/test.res: resource test {net {allow-two-primaries;} # Leave the rest as before.} Next run your drbd-sync-cfg script. Xen Live Migration with DRBD on Debian Jessie: Part 3 – DRBD Posted on 24/04/2016 by Tomas The following is part 3 of a 3 part series that goes over installation and configuration of Xen live migration with DRBD. migration we’re only going to go dual primary when needed for the migration. relatively easy fairly simple and straightforward and if you bear with me real quickly I’ll quickly jump on some test VM’s and demonstrate that for you. Continuous Mirroring / Replication (1) First of all Live Migration is not a HA solution, if your primary machine dies , there is no way to initiate a Live Migration anymore, as Live migration requires the home node to be still active, it can be used to migrate workloads away during maintenance slots etc , or to spread load, but not for HA. (2 . Xen Live Migration with DRBD on Debian Jessie: Part 1 – Dom0 Posted on 21/04/2016 by Tomas We have two Debian Jessie servers which we are going to configure as Xen hosts (domain 0) and implement live migration via DRBD. Berardi sassuolo juventus streaming. Together with modern cluster managers such as Pacemaker and Libvirt, this configuration can be used to provide genuine, enterprise-grade live migration capabilities. The drawback of this solution is that DRBD restricts migration to two nodes, at least until DRBD 9 is mature enough for use in a production environment. I discovered drbd only a couple of months ago and I’m doing my tests on citrix xenserver free. Why don’t you update o renew this blog post at nowadays maybe giving it this title “DRBD 8.3.8.1 brings full live migration for XenServer 5.6 on DRBD” Radio gila tavira online timer. DRBD 8.0.6 brings full live migration for Xen on DRBD Please note: since I first posted this entry, documentation on this subject has evolved considerably. Please check out the corresponding section in the DRBD User’s Guide for more details. Maddi mehringer football. Did a small experiment to make PVE stop migration if trying to online migrate a DRBD based VM. If migration is offline moving the VM is allowed. However a warning is printed telling if DRBD is not running Primary/Primary. The code uses grep and gawk - I should probably sit down and learn a bit of Perl in stead ;-). Minecraft skins net boy.

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Drbd Live Migration

  • Go Live » ADMIN Magazine
  • Livemigration für virtuelle Maschinen
  • DRBD 8.0.6 brings full live migration for Xen on DRBD ...
  • chr.istoph, der Blog » Blog Archive » drbd: storage live ...
  • Go Live » ADMIN Magazine

    Together with modern cluster managers such as Pacemaker and Libvirt, this configuration can be used to provide genuine, enterprise-grade live migration capabilities. The drawback of this solution is that DRBD restricts migration to two nodes, at least until DRBD 9 is mature enough for use in a production environment. Active/Active cluster, with DRBD in dual-primary mode tgo allow live migration. Stonith is enabled, using IPMI, to poweroff offending nodes. Ping resources are used to restrict guests to run on nodes with outside network connectivity. One guest has a block device attached, used as a disk for web content. Hardware Partner. No matter which industry you are located in, LINBIT keeps your critical applications and databases available. LINBIT prides itself on being flexible so naturally we work in a range of industries. Contact us to find out how we can build the perfect HA/DR storage replication solution for you.

    [CentOS-virt] Live migration and DRBD - Grokbase

    Continuous Mirroring / Replication (1) First of all Live Migration is not a HA solution, if your primary machine dies , there is no way to initiate a Live Migration anymore, as Live migration requires the home node to be still active, it can be used to migrate workloads away during maintenance slots etc , or to spread load, but not for HA. (2 ... Files Created spacewalk.res # for DRBD spacewalk.crm # DRBD/LVM configs to load into crm configure spacewalk-vd.crm # KVM VirtualDomain configs to load into crm configure DRBD Manage Storage Driver Description. This driver allows for highly available storage using DRBD9 + DRBD Manage in OpenNebula. Development. To contribute bug patches or new features, you can use the github Pull Request model.

    Livemigration für virtuelle Maschinen

    Bereits die Migration von einer VM, die auf einem 32-Bit-Host läuft, auf einen 64-Bit-Hypervisor ist eine Herausforderung. 64-Bit-VMs können auf 32-Bit-CPUs gar nicht ordentlich laufen. Wer plant, Architekturen in Virtualisierungs-Setups zu kombinieren, muss sich also mit dem kleinsten gemeinsamen Nenner abfinden, nicht selten also mit 32-Bit-Systemen. Die Live-Migration bildet in diesem Fall ein wenig die Ausnahme, da während dem Vorgang der Live-Migration die Inhalte der Konfigurationsdatei mit übertragen werden, jedoch nicht die Datei selbst. Somit hätte man spätestens nach einem Absturz auf dem neuen Server das Problem, dass XEN nicht weiß, mit welchen Parametern die VM zu starten ist.

    Live Migration and Synchronous Replicated Storage With Xen ...

    Xen LVM & DRBD Overview The Xen Hypervisor provides a great deal of flexibility and high availability options when it comes to deploying virtual machines. One of the most attractive features it offers is called live migration. Live migration is the ability to take a running virtual machine (“domU”) and move it from one Xen … In einem KVM DRBD Setup hatte sich auf Dauer eine Menge wait I/O angesammelt.. Zunächst habe ich herausgefunden, dass die einzelnen VMs sehr viel write barriers erzeugen. Dies konnte ich bei den VMs, bei denen ich root Zugang habe, mit der Option barrier=0 in der /etc/fstab einstellen. Bei den VMs, bei denen ich keinen root Zugang habe, ging das leider nur auf der DRBD Schicht.

    KVM Live Migration with Virt Manager

    Simple demonstration showing live migration between two servers using KVM/QEMU managed by libvirt and Virt Manager. Storage is DRBD (Distributed Replicated Block Device). qemu-kvm v1.1.1 libvirt ... Xen is one of the most advanced open source virtualization technology. Using virtualization allows easier server deployment and, starting, enhance application availability. Thanks to Live migration, admins can easily empty an host server (AKA Dom0) so that they can fix hardware issue, or perform updates, without the need of shutting down virtual machines.

    Xen Live Migration with DRBD on Debian Jessie ... - Lisenet

    Xen Live Migration with DRBD on Debian Jessie: Part 1 – Dom0 Posted on 21/04/2016 by Tomas We have two Debian Jessie servers which we are going to configure as Xen hosts (domain 0) and implement live migration via DRBD. It is being made available to the DRBD community by LINBIT, the project’s sponsor company, free of charge and in the hope that it will be useful.The guide is constantly being updated. We try to add information about new DRBD features simultaneously with the corresponding DRBD releases. Migration von VMs auf DRBD Live-Migration von VMs theoretisch einfach: – Daten liegen auf beiden Hosts Aber: Während der Migration Lesezugriff nötig => Migration auf Sekundär-Node nicht möglich => Dual-Primary-Mode notwendig – Split-Brain-Gefahr! – Software zur Durchführung nötig: Ganeti

    DRBD: Live Virtual Machine Migration Demo

    DRBD is a linux kernel module designed to replicate data over a network. Linux users frequently use DRBD to replicate VMs in order to minimize downtime and eliminate data-loss during server ... Es empfiehlt sich, anders als bei anderen Ressourcen, die Timeouts für Start, Stop und Migration deutlich zu erhöhen. Ich habe sie auf 240 Sekunden gesetzt. Auch die virtuellen Maschinen haben wieder Abhängigkeiten, und zwar auf die DRBD-Partitionen, die sie benutzen. Per Rechtsklick auf jede DRBD-Ressource definieren wir diese wie gewohnt ... - Live Migration support - Support for shared/floating virtual IP address to export iSCSI LUNs - Automatic promoting of DRBD resources on pool Master - Automatic demoting of DRBD resources on pool Slave - Manual mode allows for host upgrade and reboots with no storage downtime. - Management of iSCSI service

    DRBD 8.0.6 brings full live migration for Xen on DRBD ...

    DRBD 8.0.6 brings full live migration for Xen on DRBD Please note: since I first posted this entry, documentation on this subject has evolved considerably. Please check out the corresponding section in the DRBD User’s Guide for more details. virsh migrate --live tc-vsrv-1 qemu+ssh://lin-kvm-drbd1/system Not only the migration hangs also when i execute "drbd-overview" on the Server 2 from which the migration is, it hangs. On Server 1 there is no Problem and

    DRBD live migration when not connected | Proxmox Support Forum

    Did a small experiment to make PVE stop migration if trying to online migrate a DRBD based VM. If migration is offline moving the VM is allowed. However a warning is printed telling if DRBD is not running Primary/Primary. The code uses grep and gawk - I should probably sit down and learn a bit of Perl in stead ;-). Wer nämlich auf die Live-Migration nicht verzichten will, muss auf “Shared Storage” zurückgreifen. Dabei hat man die Wahl zwischen einer Lösung wie NFS (was man für VMs nicht unbedingt haben möchte), oder aber einem gemeinsamen Blockdevice (SAN, DRBD, iSCSI) mit einem Cluster-Filesystem wie GFS2 oder OCFS2. Bei vielen Knoten bieten ...

    Xen, DRBD and live migration « BenV's notes

    Xen + DRBD == Live migration! Time to introduce Xen and DRBD to eachother. First we’ll enable live migration on our resource by adding this to the resource config /etc/drbd.d/test.res: resource test {net {allow-two-primaries;} # Leave the rest as before.} Next run your drbd-sync-cfg script. hinterher (hier kann optional auch die Backports-Version verwendet werden). Nun benötigen wir Partitionen für DRBD, und zwar eine pro virtueller Maschine. Eine Live-Migration der VMs ist nur möglich, wenn jede DRBD-Partition im Dual-Primary-Modus betrieben wird - eine Änderung gegenüber dem früheren Setup. Nun könnte man sich die Frage ... By the way, drbd-km package is built with the current version of kernel, so if you will update kernel in the future, then you need to re-build DRBD again with the version of kernel.

    Live-Migration von VMs mit KVM » ADMIN-Magazin

    Auch die Hochverfügbarkeit von Services kann mit Hilfe von Live-Migration einfacher realisiert werden. Live-Migration bedeutet dabei, dass die virtuellen Maschinen, abgesehen von einer möglichst kurzen Zeitspanne, weiterlaufen. Im Idealfall merken Client-Rechner, die eine VM als Server verwenden, von einer Migration nichts. Erfahrungsbericht - Distributed Shared Storage Einsatz. Feb 10, 2017 • Andreas Germeroth • SiteOS hat im Rahmen des RZ Betriebs den Einsatz von Distributed Shared Storage Lösungen erprobt.

    Xen Live Migration with DRBD on Debian Jessie ... - Lisenet

    Xen Live Migration with DRBD on Debian Jessie: Part 3 – DRBD Posted on 24/04/2016 by Tomas The following is part 3 of a 3 part series that goes over installation and configuration of Xen live migration with DRBD. Cookies help us deliver our services. By using our services, you agree to our use of cookies. More information Live Migration . Seit DRBD v8.0.6 unterstützt drbd für Xen Live Migration. Dabei wird eine DomU fast ohne Unterbrechung zwischen zwei Hosts verschoben. Normalerweise geht das nur wenn beide Hosts über ein geteiltes Laufwerk (iSCSI/FC Disk) verfügen. Aber mit einer DRBD Active/Active Konfiguration geht das nun auch.

    DRBD: Live Virtual Machine Migration Demo - Cloudhost Blog

    migration we’re only going to go dual primary when needed for the migration. relatively easy fairly simple and straightforward and if you bear with me real quickly I’ll quickly jump on some test VM’s and demonstrate that for you. live migration with DRBD devices. Hi all, I want to do live migration of domains using DRBD block devices for synchronisation between the two Xen hosts with Xen 2.0.7. I've written a script (... Ideally, clients using the VM as a server will not even notice the migration. Live migration is implemented by some sophisticated technologies intended to ensure that, on one hand, the interruption to service is as short as possible and, on the other hand, that the state of the migrated machine exactly corresponds to that of the original ...

    flashcache + drbd + two node kvm cluster - GitHub

    When using flachcache + drbd in the configuration mentioned below I get a corrupted KVM Virtual Machine Image file after using virsh live migration. This is noticed after repeatedly live migrating the VM between two host servers. The VM host OS is Windows 7 x86 . Without flashcache I get no corrupted VM image file (tested 2000+ live migrations ... • Introduction to Ganeti • Latest features • Using Ganeti in practice • How Ganeti is deployed at Google What can it do? • Manage clusters of physical machines • Deploy Xen/KVM/lxc virtual machines on them • Live migration • Resiliency to failure (data redundancy over DRBD, or RBD) • Cluster balancing • Ease of repairs and ...

    chr.istoph, der Blog » Blog Archive » drbd: storage live ...

    drbd: storage live migration Um VMs zwischen HDD und SSD zu migrieren wäre ein „lvmove“ äquivalent ganz praktisch. Dies kann es aber nicht geben, da der Pfad zum lv dann auch angepasst werden muss. environment for live migration is a cluster of host machines interconnected by a fast, lowlatenc- y network (such as a high-speed LAN), and in this setting VMs may be migrated with very little application level down time. In this section, we discuss various aspects and relevance of executing live VM migration beyond this target

    DRBD 8.0.6 brings full live migration for Xen on DRBD ...

    I discovered drbd only a couple of months ago and I’m doing my tests on citrix xenserver free. Why don’t you update o renew this blog post at nowadays maybe giving it this title “DRBD 8.3.8.1 brings full live migration for XenServer 5.6 on DRBD” Questions tagged [live-migration] Ask Question Support the re-hosting of systems, applications and services with limited (or preferably no) unavailability apparent to users.

    DRBD – Wikipedia

    Für DRBD 8.4 raten die DRBD-Entwickler bereits für die Mehrzahl der Fälle von entsprechenden Setups ab; der einzige legitime Einsatzzweck ist demnach der kurzzeitige parallele Betrieb im Dual-Primary-Modus zum Zwecke der Live-Migration virtueller Maschinen. Live Migration: Some visualization hyper-visors require a cluster file system to support live migration. If you are using Citrix Xenserver we already did a lot of work for you. Look at DRBD binaries for Xenserver and our tech-guide Deploying DRBD with Citrix XenServer. Installation And Setup Guide For DRBD, OpenAIS, Pacemaker + Xen On OpenSUSE 11.1. Written by Adam Gandelman. The following will install and configure DRBD, OpenAIS, Pacemaker and Xen on OpenSUSE 11.1 to provide highly-available virtual machines.

    Mailing List Archive: VirtualDomain/DRBD live migration ...

    because the VM resources is dependent on the DRBD resource, and it has trouble figuring out stacked resources without restarting them? Or - does anyone know another way to manually live migrate a pacemaker/VirtualDomain managed VM (with DRBD) without having to reboot the VM after the live migrate? Thanks in advance for any clues!! BTW, I am ... Configure DRBD after installing. This example is based on the environment like follows.

    KVM Cluster with DRBD/GFS | Crunch Tools

    To use live migration, both nodes of an HA cluster must have access to a live copy of the same virtual machine data files. This is traditionally done with a SAN, but we use GFS2 over DRBD to gain the advantages of having no shared hardware/software at a lower cost. We implement RAID1 over Ethernet using a Primary/Primary configuration with DRBD protocol C. Notice again how the prompt changes, this time to indicate that we’re no longer looking at the live cluster. cib crm (live) # cib new drbd INFO: drbd shadow CIB created crm (drbd) # Now we can create our DRBD clone and display the revised configuration. crm (drbd) # configure primitive WebData ocf:linbit:drbd params drbd_resource=wwwdata \ op monitor interval= 60s crm (drbd) # configure ms ...

    DRBD9 live migration problems | Proxmox Support Forum

    I've setup a 3 node DRBD cluster server names vm1, vm2 and vm3. I created DRBD storage with replication set to 2: drbd: drbd2 redundancy 2 content images,rootdir I created a DRBD disk for VM 110, The disk is created and is using servers VM1 and VM2... Administratoren, die auf der Suche nach zuverlässiger Virtualisierung mit Live-Migration und Scale-out-Funktionalität sind, sollten für neue Setups Ceph (, ) mit in ihre Planungen einbeziehen. Denn deren Komponenten, die für ein solches Setup notwendig sind, gelten nach Meinung der Autoren der Umgebung mittlerweile als stabil und eignen ...

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