January 2022 - Users - oVirt List Archives

Important changes to the oVirt Terraform Provider
by Janos Bonic 09 Mar '22

09 Mar '22

Dear oVirt community, We are making sweeping and backwards-incompatible changes to the oVirt Terraform provider. *We want your feedback before we make these changes.* Here’s the short list what we would like to change, please read the details below. 1. The current master branch will be renamed to legacy. The usage of this provider will be phased out within Red Hat around the end / beginning of next year. If you want to create a fork, we are happy to add a link to your fork to the readme. 2. A new main branch will be created and a *new Terraform provider* written from scratch on the basis of go-ovirt-client <https://github.com/ovirt/go-ovirt-client>. (Preview here <https://github.com/haveyoudebuggedit/terraform-provider-ovirt>) This provider will only have limited functionality in its first release. 3. This new provider will be released to the Terraform registry, and will have full test coverage and documentation. This provider will be released as version v2.0.0 when ready to signal that it is built on the Terraform SDK v2. 4. A copy of this new Terraform provider will be kept in the v1 branch and backported to the Terraform SDK v1 for the benefit of the OpenShift Installer <https://github.com/openshift/installer>. We will not tag any releases, and we will not release this backported version in binary form. 5. We are hosting a *community call* on the 14th of October at 13:00 UTC on this link <https://bluejeans.com/476587312/8047>. Please join to provide feedback and suggest changes to this plan. Why are we doing this? The original Terraform provider <https://github.com/EMSL-MSC/terraform-provider-ovirt> for oVirt was written four years ago by @Maigard <https://github.com/Maigard> at EMSL-MSC <http://github.com/EMSL-MSC/terraform-provider-ovirt>. The oVirt fork of this provider is about 2 years old and went through rapid expansion, adding a large number of features. Unfortunately, this continuous rapid growth came at a price: the original test infrastructure deteriorated and certain resources, especially the virtual machine creation ballooned to a size we feel has become unmaintainable. If you tried to contribute to the Terraform provider recently, you may have noticed that our review process has become extremely slow. We can no longer run the original tests, and our end to end test suite is not integrated outside of the OpenShift CI system. Every change to the provider requires one of only 3 people to review the code and also run a manual test suite that is currently only runable on one computer. We also noticed an increasing number of bugs reported on OpenShift on oVirt/RHV related to the Terraform provider. Our original plan was that we would fix the test infrastructure and then subsequently slowly transition API calls to go-ovirt-client, but that resulted in a PR that is over 5000 lines in code <https://github.com/oVirt/terraform-provider-ovirt/pull/277> and cannot in good conscience be merged in a single piece. Splitting it up is difficult, and would likely result in broken functionality where test coverage is not present. What are we changing for you, the users? First of all, documentation. You can already preview the documentation here <https://registry.terraform.io/providers/haveyoudebuggedit/ovirt/latest/docs>. You will notice that the provider currently only supports a small set of features. You can find the full list of features <https://github.com/haveyoudebuggedit/terraform-provider-ovirt/milestone/1> we are planning for the first release on GitHub. However, if you are using resources like cluster creation, etc. these will currently not work and we recommend sticking to the old provider for the time being. The second big change will be how resources are treated. Instead of creating large resources that need to call several of the oVirt APIs to create, we will create resources that are only calling one API. This will lead to fewer bugs. For example: - ovirt_vm will create the VM, but not attach any disks or network interfaces to it. - ovirt_disk_attachment or ovirt_disk_attachments will attach a disk to the VM. - ovirt_nic will create a network interface. - ovirt_vm_start will start the virtual machine when provisioned, stop it when deprovisioned. You can use the depends_on <https://www.terraform.io/docs/language/meta-arguments/depends_on.html> meta-argument to make sure disks and network interfaces are attached before you start the VM. Alternatively, you can hot-plug network interfaces later. For example: resource "ovirt_vm" "test" { cluster_id = "some-cluster-id" template_id = "some-template-id" } resource "ovirt_disk" "test" { storagedomain_id = "some-storage-domain-id" format = "cow" size = 512 alias = "test" sparse = true } resource "ovirt_disk_attachment" "test" { vm_id = ovirt_vm.test.id disk_id = ovirt_disk.test.id disk_interface = "virtio_scsi" } resource "ovirt_vm_start" "test" { vm_id = ovirt_vm.test.id depends_on = [ovirt_disk_attachment.test] } The next change is the availability of the provider on the Terraform Registry. You will no longer have to download the binary. Instead, you will be able to simply pull in the provider like this: terraform { required_providers { ovirt = { source = "ovirt/ovirt" version = "..." } } } provider "ovirt" { # Configuration options } The configuration options for the provider itself have also been greatly expanded, see the preliminary documentation <https://registry.terraform.io/providers/haveyoudebuggedit/ovirt/latest/docs> for details. What’s changing behind the scenes? The new Terraform provider is a complete rewrite based on the go-ovirt-client <https://github.com/ovirt/go-ovirt-client> library. The single biggest advantage of this library is that it has built-in mocks for all resources it supports. Having mocks allows us to run tests without needing to spin up an oVirt instance. We have already configured GitHub Actions <https://github.com/haveyoudebuggedit/terraform-provider-ovirt/actions> on the new provider and all changes are automatically checked against these mocks. We may decide to add an end-to-end test later, but for the foreseeable future we will trust the correctness of the mocks to test community contributions. This means that we will be able to merge changes much quicker. On the OpenShift side we will also switch to using the new provider, since this is the primary motivation for the change. The OpenShift Installer uses the legacy version 1 of the Terraform SDK, so we will maintain a version 1-compatible copy in the v1 branch, which the installer can pull in. It is important to note, however, that the v1 branch will be a pure backport, we will not develop it separately. Development will be focused on the version in main that is being released to the Terraform Registry. What does this mean to you, the contributors? The current Terraform provider has several pull requests open <https://github.com/oVirt/terraform-provider-ovirt/pulls>. Unfortunately, we currently do not have the capacity to properly vet and and run our internal test suite against these changes. In contrast to the new Terraform provider, we do not have working tests, linting, and the code structure that make merging changes easier. We are very sorry to say that *these patches are unlikely to be merged*. We know that this is a terrible thing, you have put in effort into writing them. Unfortunately, we do not see an alternative as there already numerous bugs on our radar and adding more code would not make the problem go away. We want to hear your opinion As the owners of the original Terraform provider we haven’t been keeping up with reviewing your contributions and issues. Some are several months old and haven’t received answers for a long time. We want to change that, we want to hear from you. Please join our community round table around the Terraform provider on the 14th of October at 13:00 UTC on this link <https://bluejeans.com/476587312/8047>. *We want to know: Which resources are the most important to you? How does this change impact you? Can we make the transition smoother for you? Would you do anything differently in the light of the issues described above?*

2 5

NFS Synology NAS (DSM 7)
by Maton, Brett 08 Mar '22

08 Mar '22

Hi List, I can't get oVirt 4.4.8.5-1.el8 (running on oVirt Node hosts) to connect to an NFS share on a Synology NAS. I gave up trying to get the hosted engine deployed and put that on an iscsi volume instead... The directory being exported from NAS is owned by vdsm / kvm (36:36) perms I've tried: 0750 0755 0777 Tried auto / v3 / v4_0 As others have mentioned regarding NFS, if I connect manually from the host with mount nas.mydomain.com:/volume1/ov_nas It connects and works just fine. If I try to add the share as a domain in oVirt I get Operation Cancelled Error while executing action Add Storage Connection: Permission settings on the specified path do not allow access to the storage. Verify permission settings on the specified storage path. When tailing /var/log/messages on When tailing /var/log/messages on the oVirt host, I see this message appear (I changed the domain name for this post so the dots might be transcoded in reality): Aug 27 17:36:07 ov001 systemd[1]: rhev-data\x2dcenter-mnt-nas.mydomain.com:_volume1_ov__nas.mount: Succeeded. The NAS is running the 'new' DSM 7, /etc/exports looks like this: /volume1/ov_nas x.x.x.x(rw,async,no_root_squash,anonuid=36,anongid=36) (reloaded with exportfs -ra) Any suggestions appreciated. Regards, Brett

5 5

VM hanging at sustained high throughput
by David Johnson 07 Mar '22

07 Mar '22

Hi ovirt gurus, This is an interesting issue, one I never expected to have. When I push high volumes of writes to my NAS, I will cause VM's to go into a paused state. I'm looking at this from a number of angles, including upgrades on the NAS appliance. I can reproduce this problem at will running a centos 7.9 VM on Ovirt 4.5. *Questions:* 1. Is my analysis of the failure (below) reasonable/correct? 2. What am I looking for to validate this? 3. Is there a configuration that I can set to make it a little more robust while I acquire the hardware to improve the NAS? *Reproduction:* Standard test of file write speed: [root@cen-79-pgsql-01 ~]# dd if=/dev/zero of=./test bs=512k count=4096 oflag=direct 4096+0 records in 4096+0 records out 2147483648 bytes (2.1 GB) copied, 1.68431 s, 1.3 GB/s Give it more data [root@cen-79-pgsql-01 ~]# dd if=/dev/zero of=./test bs=512k count=12228 oflag=direct 12228+0 records in 12228+0 records out 6410993664 bytes (6.4 GB) copied, 7.22078 s, 888 MB/s The odds are about 50/50 that 6 GB will kill the VM, but 100% when I hit 8 GB. *Analysis:* What I think appears to be happening is that the intent cache on the NAS is on an SSD, and my VM's are pushing data about three times as fast as the SSD can handle. When the SSD gets queued up beyond a certain point, the NAS (which places reliability over speed) says "Whoah Nellie!", and the VM chokes. *David Johnson*

4 7

ovirt-4.4 morrors failing
by Ayansh Rocks 02 Mar '22

02 Mar '22

Hi All, Maximum mirrors are failing of ovirt-4.4 dependencies....what can be done here ? Error: Failed to download metadata for repo 'ovirt-4.4-centos-gluster8': Cannot prepare internal mirrorlist: No URLs in mirrorlist Errors during downloading metadata for repository 'ovirt-4.4-openstack-victoria': - Status code: 404 for http://mirror.centos.org/centos/8/cloud/x86_64/openstack-victoria/repodata/… (IP: 54.169.224.98) Error: Failed to download metadata for repo 'ovirt-4.4-openstack-victoria': Cannot download repomd.xml: Cannot download repodata/repomd.xml: All mirrors were tried Errors during downloading metadata for repository 'ovirt-4.4-centos-nfv-openvswitch': - Status code: 404 for http://mirror.centos.org/centos/8/nfv/x86_64/openvswitch-2/repodata/repomd.… (IP: 13.231.175.254) Error: Failed to download metadata for repo 'ovirt-4.4-centos-nfv-openvswitch': Cannot download repomd.xml: Cannot download repodata/repomd.xml: All mirrors were tried [root@iondelsvr12 yum.repos.d]# dnf install ovirt-hosted-engine-setup -y Ceph packages for x86_64 0.0 B/s | 0 B 00:00 Errors during downloading metadata for repository 'ovirt-4.4-centos-ceph-pacific': - Curl error (7): Couldn't connect to server for http://mirror.centos.org/centos/8/storage/x86_64/ceph-pacific/repodata/repo… [Failed to connect to mirror.centos.org port 80: Connection refused] Error: Failed to download metadata for repo 'ovirt-4.4-centos-ceph-pacific': Cannot download repomd.xml: Cannot download repodata/repomd.xml: All mirrors were tried

11 17

Unable to migrate VMs to a newly upgraded Ovirt node host
by Giulio Casella 25 Feb '22

25 Feb '22

Hi guys, I just faced a problem after updating a host. I cannot migrate VM to updated host. Here's the error I see trying to migrate a VM to that host. Dec 16 10:13:11 host01.ovn.di.unimi.it systemd[1]: Starting Network Manager Script Dispatcher Service... Dec 16 10:13:11 host01.ovn.di.unimi.it libvirtd[5667]: Unable to read from monitor: Connection reset by peer Dec 16 10:13:11 host01.ovn.di.unimi.it libvirtd[5667]: internal error: qemu unexpectedly closed the monitor: 2021-12-16T10:13:00.447480Z qemu-kvm: -numa node,nodeid=0,cpus=0-15,mem=8192: warning: Parameter -numa node,mem is deprecated, use -numa node,memdev instead 2021-12-16T10:13:11.158057Z qemu-kvm: Failed to load pckbd:kbd 2021-12-16T10:13:11.158114Z qemu-kvm: error while loading state for instance 0x0 of device 'pckbd' 2021-12-16T10:13:11.158744Z qemu-kvm: load of migration failed: No such file or directory Dec 16 10:13:11 host01.ovn.xx.xxxxx.it kvm[35663]: 0 guests now active Instead I can start VM on that host, and migrate away VM from that host. Rolling back to ovirt-node-ng-4.4.9.1-0.20211207.0+1 via host console restores full functionality. The affected version is ovirt-node-ng-4.4.9.3-0.20211215.0+1 (and also previous one, I don't remember precisely, it was another async release). Any ideas? TIA, gc

3 2

Install hosted engine using fcoe
by kyles＠aasteel.com 22 Feb '22

22 Feb '22

We're building a new cluster, but it utilizes fcoe for our storage. Is there a way to install the hosted engine using fcoe? I am unable to see our LUNs in the ovirt node currently as fcoe isn't enabled.

2 1

Deploy ovirt-csi in the kubernetes cluster
by ssarang520＠gmail.com 11 Feb '22

11 Feb '22

Hi, I want to deploy ovirt-csi in the kubernetes cluster. But the guide only has how to deploy to openshift. How can I deploy the ovirt-csi in the kubernetes cluster? Is there any way to do that?

5 5

how to search event not matching a user
by Gianluca Cecchi 07 Feb '22

07 Feb '22

Hello, every event in Advanced view has a field "User". I'm trying to compose a search in web admin of events with user different from myuser@internal It seems I'm not able to get what I want. I also tried to base attempts on an old 2019 thread (on 4.3.6) where this queries worked: Disks: name=engine* or name=host* Disks: alias=engine* or alias=host* but now on 4.4.8 gives nothing even if matched. Any hint and also documentation reference about the correct syntax to use in 4.4.x? Thanks, Gianluca

3 3

What happened to oVirt engine-setup?
by Richard W.M. Jones 07 Feb '22

07 Feb '22

A while back I had oVirt 4.4.7 installed which I used for testing. For some reason that installation has died in some way, so I'm trying to install a fresh new oVirt 4.4.10. Last time I installed ovirt, it was very easy - I provisioned a couple of machines, ran engine-setup in one, answered a few questions and after a few minutes the engine was installed. Somehow this has changed and now it's really far more complicated, involving some ansible things and wanting to create VMs and ssh everywhere. Can I go back to the old/easy way of installing oVirt engine? And if so, what happened to the instructions for that? Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com libguestfs lets you edit virtual machines. Supports shell scripting, bindings from many languages. http://libguestfs.org

4 6

Host needs to be reinstalled after configuring power management
by Andrew DeMaria 02 Feb '22

02 Feb '22

Hi, I am running ovirt 4.3 and have found the following action item immediately after configuring power management for a host: Host needs to be reinstalled as important configuration changes were applied on it. The thing is - I've just freshly installed this host and it seems strange that I need to reinstall it. Is there a better way to install a host and configure power management without having to reinstall it after? Thanks, Andrew

4 3