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ovirt 3.6: hosted engine migration to glusterfs
by Fedele Stabile 16 Sep '16

16 Sep '16

Hello, I have just upgraded my ovirt cluster from 3.5 to 3.6 and now I have HostedEngine on the LocalStorage of the node. I have executed the command hosted-engine --deploy on other nodes, actually I have the HE image on a nfs filesystem mounted on 5 nodes but I would migrate the HE image to glusterfs. What are the steps to begin this operation? Is it possible just move the disk on the glusterfs? .. alternatively, I have to install HE again but on glusterfs, restoring the db as if I have to restore from a corrupted storage. In that case I suppose that a VM named HostedEngine will appear in a down state and is not possible to delete it by WebUI because is not handled by the new engine: the only possibility is to delete it from psql working on engine-db. Can you suggest me the easiest way? Fedele Stabile

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Associate IP addresses to MAC addresses (anti-spoofing rules)
by André Gustavo 16 Sep '16

16 Sep '16

Aloha, I'm using oVirt 4 in my hosting. However, easily a customer can change the IP to another client (IP spoofing) In vNIC profiles, altered Network Filter from "VDSM-on-mac-spoofing" to "no-ip-spoofing" It worked partially, but if the client power off 'vm' and turn on the 'vm', he can perform the change in IP I tried to use eptables, but also had problems http://ebtables.netfilter.org/examples/basic.html#ex_anti-spoof What is the best option? -- --- André Gustavo Timermann Curitiba/PR - Brasil

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vlan tagging issue
by cmc 15 Sep '16

15 Sep '16

Hi, I have modified my VM network to have multiple tagged networks. It used to be an untagged network and it worked fine, but I needed to add more networks on the host. The switch it is connected to has the port configured as a trunk port with these VLANs. When a VM sends traffic out (to get a DHCP address for instance), it reaches the server but does not get the DHCP offer that the server sends. I did a tcpdump on the node that hosts the VM and the packets going out do not have a VLAN tag. I assume the VM host interface would should not have the tag present, but that the p2p1.91 interface should put the VLAN tag on. The relevant interface configuration on the node that the VM host is on looks like: 27: sohonet_DMZ: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP link/ether a0:36:9f:2a:63:20 brd ff:ff:ff:ff:ff:ff 29: p2p1.91@p2p1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master vmnet state UP link/ether a0:36:9f:2a:63:20 brd ff:ff:ff:ff:ff:ff 30: vmnet: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP link/ether a0:36:9f:2a:63:20 brd ff:ff:ff:ff:ff:ff inet6 fe80::a236:9fff:fe2a:6320/64 scope link valid_lft forever preferred_lft forever 31: vnet0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master vmnet state UNKNOWN qlen 500 link/ether fe:1a:4a:16:01:58 brd ff:ff:ff:ff:ff:ff inet6 fe80::fc1a:4aff:fe16:158/64 scope link valid_lft forever preferred_lft forever 32: vnet1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master vmnet state UNKNOWN qlen 500 link/ether fe:1a:4a:16:01:5c brd ff:ff:ff:ff:ff:ff inet6 fe80::fc1a:4aff:fe16:15c/64 scope link valid_lft forever preferred_lft forever where vnet1 is the VM interface, and p2p1.91 is the VLAN'd interface for the network. The network the VM nic is on is vmnet, and the physical interface is p2p1 Configuring an address manually does not help, nor does dropping the firewall on the host. I've run the vmnet interface in promiscuous mode to see if I can see anything coming back, but the return traffic does not appear. Any ideas as to why the network is not working? Thanks for any help. -Cam

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Add more hosts
by Davide Ferrari 15 Sep '16

15 Sep '16

Hello again as I said I'm a beginner with OVirt and I was playing with a proof-of-concept cluster with OVirt 4.0 + GlusterFS 3.8, following this guide http://www.ovirt.org/blog/2016/03/up-and-running-with-ovirt-3-6/ (it works smoothly with 4.0 too) I've created the cluster and the engine is running as an higly available VM in the cluster itself with hosted-engine --deploy but now I want to add a fourth machine to the cluster but I get this error: Cannot automatically add the host to cluster Default: Cannot add Host. There is no available server in the cluster to probe the new server. both if I try to add an host from Ovirt AAdmin GUI or if I try to run "hosted-engine --deploy" on the new machine. Is it possible to have this cluster conf (with the engine running as a VM) with 4 or more machines? What thing should I have to do? Thanks in advance -- Davide Ferrari Senior Systems Engineer

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[ANN] oVirt 4.0.4 Third Release Candidate is now available
by Sandro Bonazzola 15 Sep '16

15 Sep '16

The oVirt Project is pleased to announce the availability of the Third Release Candidate of oVirt 4.0.4 for testing, as of September 15th, 2016. This release is available now for: * Fedora 23 (tech preview) * Red Hat Enterprise Linux 7.2 or later * CentOS Linux (or similar) 7.2 or later This release supports Hypervisor Hosts running: * Red Hat Enterprise Linux 7.2 or later * CentOS Linux (or similar) 7.2 or later * Fedora 23 (tech preview) * oVirt Next Generation Node 4.0 This is pre-release software. Please take a look at our community page[1] to know how to ask questions and interact with developers and users. All issues or bugs should be reported via oVirt Bugzilla[2]. This pre-release should not to be used in production. This update is the third release candidate of the fourth in a series of stabilization updates to the 4.0 series. 4.0.4 brings 13 enhancements and 127 bugfixes, including 48 high or urgent severity fixes, on top of oVirt 4.0 series See the release notes [3] for installation / upgrade instructions and a list of new features and bugs fixed. Notes: * A new oVirt Live ISO is available. [4] * A new oVirt Next Generation Node is available [4]. * A new oVirt Engine Appliance is available for Red Hat Enterprise Linux and CentOS Linux (or similar) * Mirrors[5] might need up to one day to synchronize. Additional Resources: * Read more about the oVirt 4.0.4 release highlights: http://www.ovirt.org/release/4.0.4/ * Get more oVirt Project updates on Twitter: https://twitter.com/ovirt * Check out the latest project news on the oVirt blog: http://www.ovirt.org/blog/ [1] https://www.ovirt.org/community/ [2] https://bugzilla.redhat.com/enter_bug.cgi?classification=oVirt [3] http://www.ovirt.org/release/4.0.4/ [4] http://resources.ovirt.org/pub/ovirt-4.0-pre/iso/ [5] http://www.ovirt.org/Repository_mirrors#Current_mirrors -- Sandro Bonazzola Better technology. Faster innovation. Powered by community collaboration. See how it works at redhat.com

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mrtg/rrdtool graphs
by Bill Bill 15 Sep '16

15 Sep '16

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oVirt on a single server
by zero four 15 Sep '16

15 Sep '16

My current understanding is that oVirt no longer supports any single-server configuration since the All-In-One install was removed in 3.6. While the hosted-engine install was supposed to replace it, it requires either networked storage (nfs, iscsi) or Glusterfs. To my knowledge nfs/iscsi exported to localhost is not supported, so I would need at least 2 machines. Furthermore Gluster requires at least 3 sources of storage for quorum (it would be great if there was an option to acknowledge the risks and continue), meaning a single machine is not practical. I understand and acknowledge that oVirt is not targeted towards homelab setups, or at least small homelab setups. However I believe that having a solid configuration for such use cases would be a benefit to the project as a whole. It allows oVirt to be much more visible in the homelab community, and more accessible to testing which in turn yields more people who have experience with oVirt. As it stands most other virtualization products allow for usage (not just a livecd) in a single server environment, although not all features can be used of course. vSphere, Xenserver, Proxmox, FIFO, and Nutanix all allow an installation on a single server. It appears that oVirt/RHV is the odd-one out - and it honestly shows when you look at what people talk about online - there is a huge gap between even Proxmox and oVirt when it comes to mindshare in the tech community, and it does not favor oVirt.

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Host installation failed. Command returned failure code 1 during SSH session 'root@ovirt.vmz'.
by Vitor Mazuco 15 Sep '16

15 Sep '16

Hi, how can I install a host machine in a CentOS 6.4 using a Ovirt 3.6? I'm use a Centos in a VirtualBox, because I use Ubuntu in my real machine. Is not possible to use a Ovirt in a CentOs in a VirtualBox? Thanks in advanced.

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Limit DWH database size
by nicolas＠devels.es 15 Sep '16

15 Sep '16

Hi, Since we upgraded to 4.0.x, DWH's PostgreSQL database is getting really huge. Is there a clean way to limit its size, like setting a maximal retention time for DWH data? Thanks.

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Promiscuous mode
by qinglong.dong＠horebdata.cn 15 Sep '16

15 Sep '16

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