Re: [ovirt-users] Put the engine inside hosts after installation
Are you trying to use glusterFS as your hosted engine storage?? What problems are you having with the up and running tutorial? I have been loosely following it, and have not run into anything that is not solvable. Hosted-Engine is really the way to go, having your management machine HA is a super huge plus. Can I after that install change my mind and so move the engine as a vm in the cluster? Or can I install a new engine in the cluster and powerdown the first engine When you install a new engine the only problem I can think of off the top of my head is the database… when you install the engine, you setup a database, and if this database was on a vm in the cluster I suppose you could have as many engines as you like I have not tried this, so please correct me if I am wrong. Donny D cloudspin.me From: users-boun...@ovirt.org [mailto:users-boun...@ovirt.org] On Behalf Of Mario Giammarco Sent: Friday, January 16, 2015 2:40 AM To: users@ovirt.org Subject: [ovirt-users] Put the engine inside hosts after installation Hello, I would like to try ovirt with hosted engine installation. I had so many problems (I have written them in another thread) so I will not try anymore hosted installation (up and running with ovirt 3.5 tutorial) But now I would try this approach: I install the engine on a dedicated server or as a virtual machine in another kvm based virtualizator. Now I create an ovirt cluster and use it. Can I after that install change my mind and so move the engine as a vm in the cluster? Or can I install a new engine in the cluster and powerdown the first engine? Thanks in advance for help, Mario ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
Re: [ovirt-users] Put the engine inside hosts after installation
- Original Message - From: Donny Davis do...@cloudspin.me To: Mario Giammarco mgiamma...@gmail.com, users@ovirt.org Sent: Saturday, January 17, 2015 8:55:57 PM Subject: Re: [ovirt-users] Put the engine inside hosts after installation When you install a new engine the only problem I can think of off the top of my head is the database… when you install the engine, you setup a database, and if this database was on a vm in the cluster I suppose you could have as many engines as you like I have not tried this, so please correct me if I am wrong. This is currently not supported. See also [1]. [1] http://www.ovirt.org/Features/Engine_High_Availability Best, -- Didi ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
Re: [ovirt-users] Put the engine inside hosts after installation
On 16/01/15 19:26, Mario Giammarco wrote: 2015-01-16 12:37 GMT+01:00 Simone Tiraboschi stira...@redhat.com mailto:stira...@redhat.com: HA capability is provided for other VMs by oVirt engine. But who provide it if the engine itself is on a VM on the host that it's managing? HA for the Engine VM needs to be managed by the hosts and not the Engine itself: so we have ovirt-hosted-engine-ha that ensure HA for the engine VM, the engine cloud than provide HA for other VMs. I am surprised. I supposed that HA was self provided by the cluster like in xenserver. So you tell me that is the engine that checks if servers and vms are on like in cloudstack? This is just how any VM self-hosted setup would work. The 'engine/management' VM has to have HA managed by something other than the engine itself - otherwise if the engine is down how would it know or be able to restart itself? In VMWare or Xenserver there would have to be a separate system other than that in the engine VM to make sure that the management engine VM is a) running on at least one host on the cluster and b) *cannot* be running on more than one host to avoid screwing its own storage volume (ie heartbeat/fencing). Then this managed engine only has to take care of keeping its own VMs up. Logically I cannot see any other way this could possibly work - see chicken and egg! Cheers Alex ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
Re: [ovirt-users] Put the engine inside hosts after installation
- Original Message - From: Mario Giammarco mgiamma...@gmail.com To: users@ovirt.org Sent: Friday, January 16, 2015 10:39:44 AM Subject: [ovirt-users] Put the engine inside hosts after installation Hello, I would like to try ovirt with hosted engine installation. I had so many problems (I have written them in another thread) so I will not try anymore hosted installation (up and running with ovirt 3.5 tutorial) oVirt 3.5.1 RC1 will be published today so, if everything runs as expected, oVirt 3.5.1 will be out in a few days. oVirt 3.5.1 should solve the issue you reported. But now I would try this approach: I install the engine on a dedicated server or as a virtual machine in another kvm based virtualizator. Now I create an ovirt cluster and use it. Can I after that install change my mind and so move the engine as a vm in the cluster? As far as you maintain the same host name and a compatible network topology it should work without any hassle. Keep present that hosted-engine also installs and configures ovirt-hosted-engine-ha daemon to ensure HA capabilities restarting the engine VM if the host witch runs the VM goes down. In the setup you are proposing you are loosing that capability. Or can I install a new engine in the cluster and powerdown the first engine? Thanks in advance for help, Mario ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
Re: [ovirt-users] Put the engine inside hosts after installation
2015-01-16 11:16 GMT+01:00 Simone Tiraboschi stira...@redhat.com: oVirt 3.5.1 RC1 will be published today so, if everything runs as expected, oVirt 3.5.1 will be out in a few days. oVirt 3.5.1 should solve the issue you reported. Ok I will wait 3.5.1 and try again. Keep present that hosted-engine also installs and configures ovirt-hosted-engine-ha daemon to ensure HA capabilities restarting the engine VM if the host witch runs the VM goes down. In the setup you are proposing you are loosing that capability. I supposed the ha capability was offered by ovirt cluster. I need to investigate. ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
Re: [ovirt-users] Put the engine inside hosts after installation
- Original Message - From: Mario Giammarco mgiamma...@gmail.com To: Simone Tiraboschi stira...@redhat.com Cc: users@ovirt.org Sent: Friday, January 16, 2015 12:12:34 PM Subject: Re: [ovirt-users] Put the engine inside hosts after installation 2015-01-16 11:16 GMT+01:00 Simone Tiraboschi stira...@redhat.com: oVirt 3.5.1 RC1 will be published today so, if everything runs as expected, oVirt 3.5.1 will be out in a few days. oVirt 3.5.1 should solve the issue you reported. Ok I will wait 3.5.1 and try again. Great, please help us reporting any other issue or strange thing. Keep present that hosted-engine also installs and configures ovirt-hosted-engine-ha daemon to ensure HA capabilities restarting the engine VM if the host witch runs the VM goes down. In the setup you are proposing you are loosing that capability. I supposed the ha capability was offered by ovirt cluster. I need to investigate. HA capability is provided for other VMs by oVirt engine. But who provide it if the engine itself is on a VM on the host that it's managing? HA for the Engine VM needs to be managed by the hosts and not the Engine itself: so we have ovirt-hosted-engine-ha that ensure HA for the engine VM, the engine cloud than provide HA for other VMs. ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
Re: [ovirt-users] Put the engine inside hosts after installation
2015-01-16 12:37 GMT+01:00 Simone Tiraboschi stira...@redhat.com: HA capability is provided for other VMs by oVirt engine. But who provide it if the engine itself is on a VM on the host that it's managing? HA for the Engine VM needs to be managed by the hosts and not the Engine itself: so we have ovirt-hosted-engine-ha that ensure HA for the engine VM, the engine cloud than provide HA for other VMs. I am surprised. I supposed that HA was self provided by the cluster like in xenserver. So you tell me that is the engine that checks if servers and vms are on like in cloudstack? ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
