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[ovirt 4.2]The snapshot is deleted after restoring the snapshot
by liuweijie＠sunyainfo.com 03 Sep '20

03 Sep '20

Dear All: I used ovirt api (POST /ovirt-engine/api/vms/{vm:id}/snapshots) to create several snapshots. When I call the snapshot recovery api (POST /ovirt-engine/api/vms/{vm:id }/snapshots/{snapshot:id}/restore) to restoe the first snapshot, I found that the next few snapshots were deleted, and it was normal when I restored the last snapshot. Why does the snapshot with the earlier recovery time delete the subsequent snapshot? The vm's os is centos. Hope get help from you soon, Thank you. Yours sincerely， Evelyn

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Ovirt Host Crashed
by Darin Schmidt 02 Sep '20

02 Sep '20

I am running this as an all in one system for a test bed at home. The system crashed which lead me to have to reinstall the OS (CentOS 8) and I imported the data stores but I cannot find any way to import the VM's that were in the DATA store. I havent had a chance to backup/export the VMs. I havent been able to find anything in the documentation on how to import these VMs. Any suggestions or links to what Im looking for? I had to create a new DATA store as the option for importing a local data store wasnt an option, I assume its because the host was down. THen I imported the old data store.

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Mellanox OFED with oVirt
by Vinícius Ferrão 02 Sep '20

02 Sep '20

Hello, Anyone had success using Mellanox OFED with oVirt? Already learned some things: 1. I can’t use oVirt Node. 2. Mellanox OFED cannot be installed with mlnx-ofed-all since it breaks dnf. We need to rely on the upstream RDMA implementation. 3. The way to go is running: dnf install mlnx-ofed-dpdk-upstream-libs But after the installation I ended up with broken dnf: [root@c4140 ~]# dnf update Updating Subscription Management repositories. Last metadata expiration check: 0:03:54 ago on Tue 01 Sep 2020 11:52:41 PM -03. Error: Problem: both package mlnx-ofed-all-user-only-5.1-0.6.6.0.rhel8.2.noarch and mlnx-ofed-all-5.1-0.6.6.0.rhel8.2.noarch obsolete glusterfs-rdma - cannot install the best update candidate for package glusterfs-rdma-6.0-37.el8.x86_64 - package ovirt-host-4.4.1-4.el8ev.x86_64 requires glusterfs-rdma, but none of the providers can be installed - package mlnx-ofed-all-5.1-0.6.6.0.rhel8.2.noarch obsoletes glusterfs-rdma provided by glusterfs-rdma-6.0-37.el8.x86_64 - package glusterfs-rdma-3.12.2-40.2.el8.x86_64 requires glusterfs(x86-64) = 3.12.2-40.2.el8, but none of the providers can be installed - package glusterfs-rdma-6.0-15.el8.x86_64 requires glusterfs(x86-64) = 6.0-15.el8, but none of the providers can be installed - package glusterfs-rdma-6.0-20.el8.x86_64 requires glusterfs(x86-64) = 6.0-20.el8, but none of the providers can be installed - cannot install both glusterfs-3.12.2-40.2.el8.x86_64 and glusterfs-6.0-37.el8.x86_64 - cannot install both glusterfs-6.0-15.el8.x86_64 and glusterfs-6.0-37.el8.x86_64 - cannot install both glusterfs-6.0-20.el8.x86_64 and glusterfs-6.0-37.el8.x86_64 - cannot install the best update candidate for package ovirt-host-4.4.1-4.el8ev.x86_64 - cannot install the best update candidate for package glusterfs-6.0-37.el8.x86_64 (try to add '--allowerasing' to command line to replace conflicting packages or '--skip-broken' to skip uninstallable packages or '--nobest' to use not only best candidate packages) That are the packages installed: [root@c4140 ~]# rpm -qa *mlnx* mlnx-dpdk-19.11.0-1.51066.x86_64 mlnx-ofa_kernel-devel-5.1-OFED.5.1.0.6.6.1.rhel8u2.x86_64 mlnx-ethtool-5.4-1.51066.x86_64 mlnx-dpdk-devel-19.11.0-1.51066.x86_64 mlnx-ofa_kernel-5.1-OFED.5.1.0.6.6.1.rhel8u2.x86_64 mlnx-dpdk-doc-19.11.0-1.51066.noarch mlnx-dpdk-tools-19.11.0-1.51066.x86_64 mlnx-ofed-dpdk-upstream-libs-5.1-0.6.6.0.rhel8.2.noarch kmod-mlnx-ofa_kernel-5.1-OFED.5.1.0.6.6.1.rhel8u2.x86_64 mlnx-iproute2-5.6.0-1.51066.x86_64 And finally this is the repo that I’m using: [root@c4140 ~]# cat /etc/yum.repos.d/mellanox_mlnx_ofed.repo # # Mellanox Technologies Ltd. public repository configuration file. # For more information, refer to http://linux.mellanox.com # [mlnx_ofed_latest_base] name=Mellanox Technologies rhel8.2-$basearch mlnx_ofed latest baseurl=http://linux.mellanox.com/public/repo/mlnx_ofed/latest/rhel8.2/$bas… enabled=1 gpgkey=http://www.mellanox.com/downloads/ofed/RPM-GPG-KEY-Mellanox gpgcheck=1 So anyone had success with this?

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How can Gluster be a HCI default, when it's hardly ever working?
by thomas＠hoberg.net 02 Sep '20

02 Sep '20

I've just tried to verify what you said here. As a base line I started with the 1nHCI Gluster setup. From four VMs, two legacy, two Q35 on the single node Gluster, one survived the import, one failed silently with an empty disk, two failed somewhere in the middle of qemu-img trying to write the image to the Gluster storage. For each of those two, this always happened at the same block number, a unique one per machine, not in random places, as if qemu-img reading and writing the very same image could not agree. That's two types of error and a 75% failure rate I created another domain, basically using an NFS automount export from one of the HCI nodes (a 4.3 node serving as 4.4 storage) and imported the very same VMs (source all 4.3) transported via a re-attached export domain to 4.4. Three of the for imports worked fine, no error with qemu-img writing to NFS. All VMs had full disk images and launched, which verified that there is nothing wrong with the exports at least. But there was still one, that failed with the same qemu-img error. I then tried to move the disks from NFS to Gluster, which internally is also done via qemu-img, and I had those fail every time. Gluster or HCI seems a bit of a Russian roulette for migrations, and I am wondering how much it is better for normal operations. I'm still going to try moving via a backup domain (on NFS) and moving between that and Gluster, to see if it makes any difference. I really haven't done a lot of stress testing yet with oVirt, but this experience doesn't build confidence.

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HP blade G7, with be2net.
by Remulo 01 Sep '20

01 Sep '20

Hello I have some blades with 10GE interface that have / need the Emulex be2net driver, however it is no longer available on Redhat8 / Centos8. Is there any way to install ovirt to work on these machines? Here are some links to problems with Redhat. Emulex NIC using be2net driver https://access.redhat.com/solutions/1229853 https://access.redhat.com/solutions/514353 I did a lot of research and couldn't get a functional driver for ovirt. Thank you. -- Atenciosamente, Rêmulo Ferreira.

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Problem installing Windows VM on 4.4.1
by fgarat＠gmail.com 01 Sep '20

01 Sep '20

Hi, I'm having problem after I upgraded to 4.4.1 with Windows machines. The installation sees no disk. Even IDE disk doesn't get detected and installation won't move forward no matter what driver i use for the disk. Any one else having this issue?. Regards, Facundo

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How can you avoid breaking 4.3.11 legacy VMs imported in 4.4.1 during a migration?
by thomas＠hoberg.net 01 Sep '20

01 Sep '20

Testing the 4.3 to 4.4 migration... what I describe here is facts is mostly observations and conjecture, could be wrong, just makes writing easier... While 4.3 seems to maintain a default emulated machine type (pc-i440fx-rhel7.6.0 by default), it doesn't actually allow setting it in the cluster settings: Could be built-in, could be inherited from the default template... Most of my VMs were created with the default on 4.3. oVirt 4.4 presets that to pc-q35-rhel8.1.0 and that has implications: 1. Any VM imported from an export on a 4.3 farm, will get upgraded to Q35, which unfortunately breaks things, e.g. network adapters getting renamed as the first issue I stumbled on some Debian machines 2. If you try to compensate by lowering the cluster default from Q35 to pc-i44fx the hosted-engine will fail, because it was either built or came as Q35 and can no longer find critical devices: It evidently doesn't take/use the VM configuration data it had at the last shutdown, but seems to re-generate it according to some obscure logic, which fails here. I've tried creating a bit of backward compatibility by creating another template based on pc-i440fx, but at the time of the import, I cannot switch the template. If I try to downgrade the cluster, the hosted-engine will fail to start and I can't change the template of the hosted-engine to something Q35. Currently this leaves me in a position where I can't separate the move of VMs from 4.3 to 4.4 and the upgrade of the virtual hardware, which is a different mess for every OS in the mix of VMs. Recommendations, tips anyone? P.S. A hypervisor reconstructing the virtual hardware from anywhere but storage at every launch, is difficult to trust IMHO.

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Upgrade Doc typo.
by carl langlois 01 Sep '20

01 Sep '20

Hi, Not sure if this is relevant but in the ovirt doc in the 4.2 to 4.3 upgrade the repo rpm is specified with 4,4 rpm . Thanks Carl [image: image.png]

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Re: Promiscuous Mode
by thomas＠hoberg.net 31 Aug '20

31 Aug '20

Not sure it will actually do that, but if you create a new network profile, you can select a 'port mirroring' option: It is my understanding that is what you need. You may also want to deselect the filtering rules in the same place.

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can't mount an export domain with 4K block size (VDO) as PosixFS (xfs)
by thomas＠hoberg.net 31 Aug '20

31 Aug '20

After this (https://devconfcz2020a.sched.com/event/YOtG/ovirt-4k-teaching-an-old-dog-ne…) I sure do not expect this (log below): Actually I am trying to evaluate just how portable oVirt storage is and this case I had prepared a USB3 HDD with VDO, which I could literally move between farms to transport VMs. Logical disks are typically large for simplicity within the VMs, QCOW2 and VDO assumed to compensate for this 'lack of planning' while the allocated storage easily fits the HDD. Once I got beyond the initial issues, I came across this somewhat unexpected issue: VDO storage uses 4k blocks all around, but evidently when you mount an export domain (or I guess any domain) as POSIX, 512byte blocks are assumed somewhere and 4k blocks rejected. I'd say that is a bug in VDSM, right? Or is there anything in the mount options to fix this? 020-08-31 18:44:40,424+0200 INFO (periodic/0) [vdsm.api] START repoStats(domains=()) from=internal, task_id=7a293dec-85b3-4b82-92b7-4e7d03b40343 (api:48) 2020-08-31 18:44:40,425+0200 INFO (periodic/0) [vdsm.api] FINISH repoStats return={'9992dc21-edf2-4951-9020-7c78f1220e02': {'code': 0, 'lastCheck': '1.6', 'delay': '0.00283651', 'valid': True, 'version': 5, 'acquired': True, 'actual': True}, '25d95783-44df-4fda-b642-55fe09162149': {'code': 0, 'lastCheck': '2.2', 'delay': '0.00256944', 'valid': True, 'version': 5, 'acquired': True, 'actual': True}, '148d9e9e-d7b8-4220-9ee8-057da96e608c': {'code': 0, 'lastCheck': '2.2', 'delay': '0.00050217', 'valid': True, 'version': 5, 'acquired': True, 'actual': True}} from=internal, task_id=7a293dec-85b3-4b82-92b7-4e7d03b40343 (api:54) 2020-08-31 18:44:41,121+0200 INFO (jsonrpc/7) [jsonrpc.JsonRpcServer] RPC call Host.ping2 succeeded in 0.00 seconds (__init__:312) 2020-08-31 18:44:41,412+0200 INFO (jsonrpc/0) [jsonrpc.JsonRpcServer] RPC call Host.ping2 succeeded in 0.00 seconds (__init__:312) 2020-08-31 18:44:41,414+0200 INFO (jsonrpc/2) [vdsm.api] START repoStats(domains=['9992dc21-edf2-4951-9020-7c78f1220e02']) from=::1,44782, task_id=657c820e-e2eb-4b1d-b2fb-1772b3af6f32 (api:48) 2020-08-31 18:44:41,414+0200 INFO (jsonrpc/2) [vdsm.api] FINISH repoStats return={'9992dc21-edf2-4951-9020-7c78f1220e02': {'code': 0, 'lastCheck': '2.6', 'delay': '0.00283651', 'valid': True, 'version': 5, 'acquired': True, 'actual': True}} from=::1,44782, task_id=657c820e-e2eb-4b1d-b2fb-1772b3af6f32 (api:54) 2020-08-31 18:44:41,414+0200 INFO (jsonrpc/2) [jsonrpc.JsonRpcServer] RPC call Host.getStorageRepoStats succeeded in 0.00 seconds (__init__:312) 2020-08-31 18:44:41,965+0200 INFO (jsonrpc/3) [IOProcessClient] (Global) Starting client (__init__:308) 2020-08-31 18:44:41,984+0200 INFO (ioprocess/87332) [IOProcess] (Global) Starting ioprocess (__init__:434) 2020-08-31 18:44:42,006+0200 INFO (jsonrpc/3) [storage.StorageDomainCache] Removing domain fe9fb0db-2743-457a-80f0-9a4edc509e9d from storage domain cache (sdc:211) 2020-08-31 18:44:42,006+0200 INFO (jsonrpc/3) [storage.StorageDomainCache] Invalidating storage domain cache (sdc:74) 2020-08-31 18:44:42,006+0200 INFO (jsonrpc/3) [vdsm.api] FINISH connectStorageServer return={'statuslist': [{'id': '00000000-0000-0000-0000-000000000000', 'status': 0}]} from=::ffff:192.168.0.87,40378, flow_id=05fe72ef-c8ac-4e03-8453-5171e5fc5f8b, task_id=b92d4144-a9db-4423-ba6b-35934d4f9200 (api:54) 2020-08-31 18:44:42,008+0200 INFO (jsonrpc/3) [jsonrpc.JsonRpcServer] RPC call StoragePool.connectStorageServer succeeded in 3.11 seconds (__init__:312) 2020-08-31 18:44:42,063+0200 INFO (jsonrpc/5) [vdsm.api] START getStorageDomainsList(spUUID='00000000-0000-0000-0000-000000000000', domainClass=3, storageType='', remotePath='/dev/mapper/vdo1', options=None) from=::ffff:192.168.0.87,40378, flow_id=eff548f9-b663-45dd-b8a5-5854f9b5dde8, task_id=98ca66a5-edee-40d4-9253-6a46409241cc (api:48) 2020-08-31 18:44:42,063+0200 INFO (jsonrpc/5) [storage.StorageDomainCache] Refreshing storage domain cache (resize=True) (sdc:80) 2020-08-31 18:44:42,063+0200 INFO (jsonrpc/5) [storage.ISCSI] Scanning iSCSI devices (iscsi:442) 2020-08-31 18:44:42,101+0200 INFO (jsonrpc/1) [jsonrpc.JsonRpcServer] RPC call Host.ping2 succeeded in 0.00 seconds (__init__:312) 2020-08-31 18:44:42,128+0200 INFO (jsonrpc/5) [storage.ISCSI] Scanning iSCSI devices: 0.06 seconds (utils:390) 2020-08-31 18:44:42,129+0200 INFO (jsonrpc/5) [storage.HBA] Scanning FC devices (hba:60) 2020-08-31 18:44:42,182+0200 INFO (jsonrpc/6) [jsonrpc.JsonRpcServer] RPC call Host.ping2 succeeded in 0.00 seconds (__init__:312) 2020-08-31 18:44:42,184+0200 INFO (jsonrpc/4) [vdsm.api] START repoStats(domains=['9992dc21-edf2-4951-9020-7c78f1220e02']) from=::1,44782, task_id=7b3f1eb8-f7e3-4467-93a1-27ef9721c90c (api:48) 2020-08-31 18:44:42,184+0200 INFO (jsonrpc/4) [vdsm.api] FINISH repoStats return={'9992dc21-edf2-4951-9020-7c78f1220e02': {'code': 0, 'lastCheck': '3.4', 'delay': '0.00283651', 'valid': True, 'version': 5, 'acquired': True, 'actual': True}} from=::1,44782, task_id=7b3f1eb8-f7e3-4467-93a1-27ef9721c90c (api:54) 2020-08-31 18:44:42,184+0200 INFO (jsonrpc/4) [jsonrpc.JsonRpcServer] RPC call Host.getStorageRepoStats succeeded in 0.00 seconds (__init__:312) 2020-08-31 18:44:42,277+0200 INFO (jsonrpc/5) [storage.HBA] Scanning FC devices: 0.15 seconds (utils:390) 2020-08-31 18:44:42,309+0200 INFO (jsonrpc/5) [storage.Multipath] Resizing multipath devices (multipath:104) 2020-08-31 18:44:42,312+0200 INFO (jsonrpc/5) [storage.Multipath] Resizing multipath devices: 0.00 seconds (utils:390) 2020-08-31 18:44:42,312+0200 INFO (jsonrpc/5) [storage.StorageDomainCache] Refreshing storage domain cache: 0.25 seconds (utils:390) 2020-08-31 18:44:42,418+0200 INFO (tmap-569/0) [IOProcessClient] (_dev_mapper_vdo1) Starting client (__init__:308) 2020-08-31 18:44:42,445+0200 INFO (tmap-569/1) [IOProcessClient] (glusterSD/nucvirt.mtk.hoberg.net:_data) Starting client (__init__:308) 2020-08-31 18:44:42,449+0200 INFO (ioprocess/87496) [IOProcess] (_dev_mapper_vdo1) Starting ioprocess (__init__:434) 2020-08-31 18:44:42,457+0200 INFO (tmap-569/2) [IOProcessClient] (glusterSD/nucvirt.mtk.hoberg.net:_vmstore) Starting client (__init__:308) 2020-08-31 18:44:42,465+0200 INFO (ioprocess/87508) [IOProcess] (glusterSD/nucvirt.mtk.hoberg.net:_data) Starting ioprocess (__init__:434) 2020-08-31 18:44:42,478+0200 INFO (tmap-569/3) [IOProcessClient] (glusterSD/nucvirt.mtk.hoberg.net:_engine) Starting client (__init__:308) 2020-08-31 18:44:42,486+0200 INFO (ioprocess/87516) [IOProcess] (glusterSD/nucvirt.mtk.hoberg.net:_vmstore) Starting ioprocess (__init__:434) 2020-08-31 18:44:42,514+0200 INFO (ioprocess/87533) [IOProcess] (glusterSD/nucvirt.mtk.hoberg.net:_engine) Starting ioprocess (__init__:434) 2020-08-31 18:44:42,522+0200 INFO (jsonrpc/5) [IOProcessClient] (fe9fb0db-2743-457a-80f0-9a4edc509e9d) Starting client (__init__:308) 2020-08-31 18:44:42,553+0200 INFO (ioprocess/87552) [IOProcess] (fe9fb0db-2743-457a-80f0-9a4edc509e9d) Starting ioprocess (__init__:434) 2020-08-31 18:44:42,582+0200 ERROR (jsonrpc/5) [storage.HSM] Unexpected error (hsm:2843) Traceback (most recent call last): File "/usr/lib/python3.6/site-packages/vdsm/storage/hsm.py", line 2829, in getStorageDomainsList dom = sdCache.produce(sdUUID=sdUUID) File "/usr/lib/python3.6/site-packages/vdsm/storage/sdc.py", line 115, in produce domain.getRealDomain() File "/usr/lib/python3.6/site-packages/vdsm/storage/sdc.py", line 51, in getRealDomain return self._cache._realProduce(self._sdUUID) File "/usr/lib/python3.6/site-packages/vdsm/storage/sdc.py", line 139, in _realProduce domain = self._findDomain(sdUUID) File "/usr/lib/python3.6/site-packages/vdsm/storage/sdc.py", line 156, in _findDomain return findMethod(sdUUID) File "/usr/lib/python3.6/site-packages/vdsm/storage/nfsSD.py", line 146, in findDomain return NfsStorageDomain(NfsStorageDomain.findDomainPath(sdUUID)) File "/usr/lib/python3.6/site-packages/vdsm/storage/fileSD.py", line 390, in __init__ manifest.block_size, storage_block_size) File "/usr/lib/python3.6/site-packages/vdsm/storage/sd.py", line 939, in _validate_storage_block_size raise se.StorageDomainBlockSizeMismatch(block_size, storage_block_size) vdsm.storage.exception.StorageDomainBlockSizeMismatch: Block size does not match storage block size: 'block_size=512, storage_block_size=4096' 2020-08-31 18:44:42,582+0200 INFO (jsonrpc/5) [vdsm.api] FINISH getStorageDomainsList return={'domlist': []} from=::ffff:192.168.0.87,40378, flow_id=eff548f9-b663-45dd-b8a5-5854f9b5dde8, task_id=98ca66a5-edee-40d4-9253-6a46409241cc (api:54) 2020-08-31 18:44:42,582+0200 INFO (jsonrpc/5) [jsonrpc.JsonRpcServer] RPC call Host.getStorageDomains succeeded in 0.52 seconds (__init__:312) 2020-08-31 18:44:42,801+0200 INFO (jsonrpc/7) [vdsm.api] START disconnectStorageServer(domType=6, spUUID='00000000-0000-0000-0000-000000000000', conList=[{'password': '********', 'vfs_type': 'xfs', 'port': '', 'mnt_options': 'rw,relatime,seclabel,attr2,inode64,noquota,_netdev,x-systemd.device-timeout=0', 'iqn': '', 'connection': '/dev/mapper/vdo1', 'ipv6_enabled': 'false', 'id': 'b4a73d6a-344c-446b-a33d-7b665e78578d', 'user': '', 'tpgt': '1'}], options=None) from=::ffff:192.168.0.87,40378, flow_id=6678917a-b29c-416c-aa2d-5abc1d5351a3, task_id=3d0cf36e-427d-4000-8857-a8a2af641b10 (api:48) 2020-08-31 18:44:42,801+0200 INFO (jsonrpc/7) [storage.Mount] unmounting /rhev/data-center/mnt/_dev_mapper_vdo1 (mount:215) 2020-08-31 18:44:42,806+0200 INFO (jsonrpc/0) [vdsm.api] START disconnectStorageServer(domType=6, spUUID='00000000-0000-0000-0000-000000000000', conList=[{'password': '********', 'vfs_type': 'xfs', 'port': '', 'mnt_options': 'rw,relatime,seclabel,attr2,inode64,noquota,_netdev,x-systemd.device-timeout=0', 'iqn': '', 'connection': '/dev/mapper/vdo1', 'ipv6_enabled': 'false', 'id': 'b4a73d6a-344c-446b-a33d-7b665e78578d', 'user': '', 'tpgt': '1'}], options=None) from=::ffff:192.168.0.87,40378, flow_id=bb449405-5b78-4b65-a352-e2e94a269df9, task_id=09783e0a-933c-448d-b0ca-1b5d351eb042 (api:48) 2020-08-31 18:44:42,806+0200 INFO (jsonrpc/0) [storage.Mount] unmounting /rhev/data-center/mnt/_dev_mapper_vdo1 (mount:215) 2020-08-31 18:44:42,821+0200 ERROR (jsonrpc/0) [storage.HSM] Could not disconnect from storageServer (hsm:2528) Traceback (most recent call last): File "/usr/lib/python3.6/site-packages/vdsm/storage/hsm.py", line 2524, in disconnectStorageServer conObj.disconnect() File "/usr/lib/python3.6/site-packages/vdsm/storage/storageServer.py", line 201, in disconnect self._mount.umount(True, True) File "/usr/lib/python3.6/site-packages/vdsm/storage/mount.py", line 217, in umount umount(self.fs_file, force=force, lazy=lazy, freeloop=freeloop) File "/usr/lib/python3.6/site-packages/vdsm/common/supervdsm.py", line 56, in __call__ return callMethod() File "/usr/lib/python3.6/site-packages/vdsm/common/supervdsm.py", line 54, in <lambda> **kwargs) File "<string>", line 2, in umount File "/usr/lib64/python3.6/multiprocessing/managers.py", line 772, in _callmethod raise convert_to_error(kind, result) vdsm.storage.mount.MountError: Command ['/usr/bin/umount', '-f', '-l', '/rhev/data-center/mnt/_dev_mapper_vdo1'] failed with rc=32 out=b'' err=b'umount: /rhev/data-center/mnt/_dev_mapper_vdo1: not mounted.\n' 2020-08-31 18:44:42,821+0200 INFO (jsonrpc/0) [storage.StorageDomainCache] Refreshing storage domain cache (resize=False) (sdc:80)

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