Re: [ovirt-users] Advise needed: building cheap HA oVirt cluster with just 2 physical servers

2017-11-08 Thread Artem Tambovskiy
Hi, Can anyone share their experience on deploying hosted-engine with GlusterFS cluster? I managed to setup a GlusterFS cluster and started to deploy hosted engine. At first stage I was beaten by firewall rules - the deployment process interrupted at GlusterFS config stage. After fixing the

Re: [ovirt-users] Advise needed: building cheap HA oVirt cluster with just 2 physical servers

2017-11-03 Thread Martin Sivak
Hi, cockpit is enabled by default when you use ovirt-node. You will probably have to install the necessary cockpit packages yourself on pure CentOS - you will need cockpit and ovirt + gdeploy cockpit plugins (sadly I do not recall the exact package names). With regards to arbiter and the

Re: [ovirt-users] Advise needed: building cheap HA oVirt cluster with just 2 physical servers

2017-11-03 Thread Artem Tambovskiy
Thanks for an article, Martin! Any chance to configure a third cost to act as GlusterFS Arbitr only using this wizard? And stupid question - how to make this wizard up and running? I've everything installed and nothing is runnin on port 9090 :) Regards, Artem On Fri, Nov 3, 2017 at 12:49 PM,

Re: [ovirt-users] Advise needed: building cheap HA oVirt cluster with just 2 physical servers

2017-11-03 Thread Martin Sivak
Hi, you should take a look at the hyper converged way of installing oVirt. We have a cockpit wizard that does almost everything for you: https://www.ovirt.org/documentation/gluster-hyperconverged/chap-Deploying_Hyperconverged/ It uses three hosts and collocates the VMs together with Gluster

Re: [ovirt-users] Advise needed: building cheap HA oVirt cluster with just 2 physical servers

2017-11-03 Thread Kai Wagner
Nevertheless you could end up with a split brain situation because you've no quorum. So it doesn't matter which kind of cluster you want to build, but you'll need a third node as a tiebreaker. I know that a 2 node cluster with drbd would work, but not in all cases, so do yourself a favor and get

Re: [ovirt-users] Advise needed: building cheap HA oVirt cluster with just 2 physical servers

2017-11-03 Thread Eduardo Mayoral
Exporting the VMs to an export storage domain on the first server, copying the files to another export storage domain on the second server and importing it should work. What kind of problem did you find? As for the order of doing things, my first oVirt lab was a 3-node setup with gluster (oVirt

Re: [ovirt-users] Advise needed: building cheap HA oVirt cluster with just 2 physical servers

2017-11-03 Thread Johan Bernhardsson
On drbd you have one master and use iscsi to share the storage. If the master fails it will fail over to the other. You have one up that will act as the iscsi storage and jump between the hosts. If you run drbd master master ... Then you might get split brain and that is not fun :) On

Re: [ovirt-users] Advise needed: building cheap HA oVirt cluster with just 2 physical servers

2017-11-03 Thread Artem Tambovskiy
Good point! Need to focus on this first Thanks, Artem On Fri, Nov 3, 2017 at 10:50 AM, Karli Sjöberg wrote: > On fre, 2017-11-03 at 10:39 +0300, Artem Tambovskiy wrote: > > Thanks Eduardo! > > > > I think I can find a third server to build a glusterFS storage. So > > the

Re: [ovirt-users] Advise needed: building cheap HA oVirt cluster with just 2 physical servers

2017-11-03 Thread Eduardo Mayoral
Just genuinely curious, how do you avoid split-brain situations with a 2-node setup (be it drbd, gluster or anything else)? Eduardo Mayoral Jimeno (emayo...@arsys.es) Administrador de sistemas. Departamento de Plataformas. Arsys internet. +34 941 620 145 ext. 5153 On 03/11/17 08:40, Johan

Re: [ovirt-users] Advise needed: building cheap HA oVirt cluster with just 2 physical servers

2017-11-03 Thread Karli Sjöberg
On fre, 2017-11-03 at 10:39 +0300, Artem Tambovskiy wrote: > Thanks Eduardo! > > I think I can find a third server to build a glusterFS storage. So > the first step will be to install a self-hosted engine on the new > server and start building a glusterFS storage. You´ll need to build the

Re: [ovirt-users] Advise needed: building cheap HA oVirt cluster with just 2 physical servers

2017-11-03 Thread Johan Bernhardsson
Check on drbd. I have used that to build a cluster for two servers. It need some more work than a three node gluster conf but works well. I even think they have a white paper on how to do it for virtualization. /Johan On November 3, 2017 08:11:04 Artem Tambovskiy

Re: [ovirt-users] Advise needed: building cheap HA oVirt cluster with just 2 physical servers

2017-11-03 Thread Artem Tambovskiy
Thanks Eduardo! I think I can find a third server to build a glusterFS storage. So the first step will be to install a self-hosted engine on the new server and start building a glusterFS storage. IS there any easy way to migrate existing 5 VM's running on the second bare-metal oVirt host, right?

Re: [ovirt-users] Advise needed: building cheap HA oVirt cluster with just 2 physical servers

2017-11-03 Thread Eduardo Mayoral
For HA you will need some kind of storage available to all the compute nodes in the cluster. If you have no external storage and few nodes, I think your best option for storage is gluster , and the minimum number of nodes you will need for HA is 3 (the third gluster node can be metadata-only, but

[ovirt-users] Advise needed: building cheap HA oVirt cluster with just 2 physical servers

2017-11-03 Thread Artem Tambovskiy
Looking for a design advise on oVirt provisioning. I'm running a PoC lab on single bare-metal host (suddenly it was setup with just Local Storage domain) and no I'd like to rebuild the setup by making a cluster of 2 physical servers, no external storage array available. That are the options here?