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Testing image transfer and backup with OST environment
by Nir Soffer 08 Nov '20

08 Nov '20

I want to share useful info from the OST hackathon we had this week. Image transfer must work with real hostnames to allow server certificate verification. Inside the OST environment, engine and hosts names are resolvable, but on the host (or vm) running OST, the names are not available. This can be fixed by adding the engine and hosts to /etc/hosts like this: $ cat /etc/hosts 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6 192.168.200.2 engine 192.168.200.3 lago-basic-suite-master-host-0 192.168.200.4 lago-basic-suite-master-host-1 It would be if this was automated by OST. You can get the details using: $ cd src/ovirt-system-tests/deployment-xxx $ lago status OST keeps the deployment directory in the source directory. Be careful if you like to "git clean -dxf' since it will delete all the deployment and you will have to kill the vms manually later. The next thing we need is the engine ca cert. It can be fetched like this: $ curl -k 'https://engine/ovirt-engine/services/pki-resource?resource=ca-certificate&f…' > ca.pem I would expect OST to do this and put the file in the deployment directory. To upload or download images, backup vms or use other modern examples from the sdk, you need to have a configuration file like this: $ cat ~/.config/ovirt.conf [engine] engine_url = https://engine username = admin@internal password = 123 cafile = ca.pem With this uploading from the same directory where ca.pem is located will work. If you want it to work from any directory, use absolute path to the file. I created a test image using qemu-img and qemu-io: $ qemu-img create -f qcow2 test.qcow2 1g To write some data to the test image we can use qemu-io. This writes 64k of data (b"\xf0" * 64 * 1024) to offset 1 MiB. $ qemu-io -f qcow2 -c "write -P 240 1m 64k" test.qcow2 Since this image contains only 64k of data, uploading it should be instant. The last part we need is the imageio client package: $ dnf install ovirt-imageio-client To upload the image, we need at least one host up and storage domains created. I did not find a way to prepare OST, so simply run this after run_tests completed. It took about an hour. To upload the image to raw sparse disk we can use: $ python3 /usr/share/doc/python3-ovirt-engine-sdk4/examples/upload_disk.py -c engine --sd-name nfs --disk-sparse --disk-format raw test.qcow2 [ 0.0 ] Checking image... [ 0.0 ] Image format: qcow2 [ 0.0 ] Disk format: raw [ 0.0 ] Disk content type: data [ 0.0 ] Disk provisioned size: 1073741824 [ 0.0 ] Disk initial size: 1073741824 [ 0.0 ] Disk name: test.raw [ 0.0 ] Disk backup: False [ 0.0 ] Connecting... [ 0.0 ] Creating disk... [ 36.3 ] Disk ID: 26df08cf-3dec-47b9-b776-0e2bc564b6d5 [ 36.3 ] Creating image transfer... [ 38.2 ] Transfer ID: de8cfac9-ead2-4304-b18b-a1779d647716 [ 38.2 ] Transfer host name: lago-basic-suite-master-host-1 [ 38.2 ] Uploading image... [ 100.00% ] 1.00 GiB, 1.79 seconds, 571.50 MiB/s [ 40.0 ] Finalizing image transfer... [ 44.1 ] Upload completed successfully I uploaded this before I added the hosts to /etc/hosts, so the upload was done via the proxy. Yes, it took 36 seconds to create the disk. To download the disk use: $ python3 /usr/share/doc/python3-ovirt-engine-sdk4/examples/download_disk.py -c engine 5ac63c72-6296-46b1-a068-b1039c8ecbd1 downlaod.qcow2 [ 0.0 ] Connecting... [ 0.2 ] Creating image transfer... [ 1.6 ] Transfer ID: a99e2a43-8360-4661-81dc-02828a88d586 [ 1.6 ] Transfer host name: lago-basic-suite-master-host-1 [ 1.6 ] Downloading image... [ 100.00% ] 1.00 GiB, 0.32 seconds, 3.10 GiB/s [ 1.9 ] Finalizing image transfer... We can verify the transfers using checksums. Here we create a checksum of the remote disk: $ python3 /usr/share/doc/python3-ovirt-engine-sdk4/examples/checksum_disk.py -c engine 26df08cf-3dec-47b9-b776-0e2bc564b6d5 { "algorithm": "blake2b", "block_size": 4194304, "checksum": "a79a1efae73484e0218403e6eb715cdf109c8e99c2200265b779369339cf347b" } And checksum of the downloaded image - they should match: $ python3 /usr/share/doc/python3-ovirt-engine-sdk4/examples/checksum_image.py downlaod.qcow2 { "algorithm": "blake2b", "block_size": 4194304, "checksum": "a79a1efae73484e0218403e6eb715cdf109c8e99c2200265b779369339cf347b" } Same upload to iscsi domain, using qcow2 format: $ python3 /usr/share/doc/python3-ovirt-engine-sdk4/examples/upload_disk.py -c engine --sd-name iscsi --disk-sparse --disk-format qcow2 test.qcow2 [ 0.0 ] Checking image... [ 0.0 ] Image format: qcow2 [ 0.0 ] Disk format: cow [ 0.0 ] Disk content type: data [ 0.0 ] Disk provisioned size: 1073741824 [ 0.0 ] Disk initial size: 458752 [ 0.0 ] Disk name: test.qcow2 [ 0.0 ] Disk backup: False [ 0.0 ] Connecting... [ 0.0 ] Creating disk... [ 27.8 ] Disk ID: e7ef253e-7baa-4d4a-a9b2-1a6b7db13f41 [ 27.8 ] Creating image transfer... [ 30.0 ] Transfer ID: 88328857-ac99-4ee1-9618-6b3cd14a7db8 [ 30.0 ] Transfer host name: lago-basic-suite-master-host-0 [ 30.0 ] Uploading image... [ 100.00% ] 1.00 GiB, 0.31 seconds, 3.28 GiB/s [ 30.3 ] Finalizing image transfer... [ 35.4 ] Upload completed successfully Again, creating the disk is very slow, not sure why. Probably having a storage server on a nested vm is not a good idea. We can compare the checksum with the source image since checksum are computed from the guest content: [nsoffer@ost ~]$ python3 /usr/share/doc/python3-ovirt-engine-sdk4/examples/checksum_disk.py -c engine e7ef253e-7baa-4d4a-a9b2-1a6b7db13f41 { "algorithm": "blake2b", "block_size": 4194304, "checksum": "a79a1efae73484e0218403e6eb715cdf109c8e99c2200265b779369339cf347b" } Finally, we can try real images using virt-builder: $ virt-builder fedora-32 Will create a new Fedora 32 server image in the current directory. See --help for many useful options to create different format, set root password, or install packages. Uploading this image is much slower: $ python3 /usr/share/doc/python3-ovirt-engine-sdk4/examples/upload_disk.py -c engine --sd-name nfs --disk-sparse --disk-format raw fedora-32.img [ 0.0 ] Checking image... [ 0.0 ] Image format: raw [ 0.0 ] Disk format: raw [ 0.0 ] Disk content type: data [ 0.0 ] Disk provisioned size: 6442450944 [ 0.0 ] Disk initial size: 6442450944 [ 0.0 ] Disk name: fedora-32.raw [ 0.0 ] Disk backup: False [ 0.0 ] Connecting... [ 0.0 ] Creating disk... [ 36.8 ] Disk ID: b17126f3-fa03-4c22-8f59-ef599b64a42e [ 36.8 ] Creating image transfer... [ 38.5 ] Transfer ID: fe82fb86-b87a-4e49-b9cd-f1f4334e7852 [ 38.5 ] Transfer host name: lago-basic-suite-master-host-0 [ 38.5 ] Uploading image... [ 100.00% ] 6.00 GiB, 99.71 seconds, 61.62 MiB/s [ 138.2 ] Finalizing image transfer... [ 147.8 ] Upload completed successfully At the current state of OST, we should avoid such long tests. Using backup_vm.py and other examples should work in the same way. I posted this patch to improve nfs performance, please review: https://gerrit.ovirt.org/c/112067/ Nir

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回复:Re: Host's status how to change to UP when I execute Management--> Active command
by 李伏琼 05 Nov '20

05 Nov '20

thanks very much --------------原始邮件-------------- 发件人："Liran Rotenberg "<lrotenbe(a)redhat.com>; 发送时间：2020年11月5日(星期四) 晚上11:52 收件人："lifuqiong(a)sunyainfo.com" <lifuqiong(a)sunyainfo.com>; 抄送："users "<users(a)ovirt.org>;"devel "<devel(a)ovirt.org>; 主题：[ovirt-devel] Re: Host's status how to change to UP when I execute Management--> Active command ----------------------------------- Hi,The engine will monitor that host. Once it's reachable and we can get information from it the status will change accordingly. Please check out the HostMonitoring class. On Thu, Nov 5, 2020 at 11:57 AM lifuqiong(a)sunyainfo.com <lifuqiong(a)sunyainfo.com> wrote: Hi,      I checkout ovirt-engine's code with branch 4.2;  When execute Host's Management --> Active  command,  ovirt engine just set vds's status to "Unassigned" but how the vds's status changed to "UP" in ovirt-engine?  The code in ActiveVdsCommand.executeCommand() as follows: protected void executeCommand() {         final VDS vds = getVds();         try (EngineLock monitoringLock = acquireMonitorLock("Activate host")) {             executionHandler.updateSpecificActionJobCompleted(vds.getId(), ActionType.MaintenanceVds, false);             setSucceeded(setVdsStatus(VDSStatus.Unassigned).getSucceeded());             if (getSucceeded()) {                 TransactionSupport.executeInNewTransaction(() -> {                     // set network to operational / non-operational                     List<Network> networks = networkDao.getAllForCluster(vds.getClusterId());                     networkClusterHelper.setStatus(vds.getClusterId(), networks);                     return null;                 });                 // Start glusterd service on the node, which would haven been stopped due to maintenance                 if (vds.getClusterSupportsGlusterService()) {                     runVdsCommand(VDSCommandType.ManageGlusterService,                             new GlusterServiceVDSParameters(vds.getId(), Arrays.asList("glusterd"), "restart"));                     // starting vdo service                     GlusterStatus isRunning = glusterUtil.isVDORunning(vds.getId());                     switch (isRunning) {                     case DOWN:                         log.info("VDO service is down in host : '{}' with id '{}', starting VDO service",                                 vds.getHostName(),                                 vds.getId());                         startVDOService(vds);                         break;                     case UP:                         log.info("VDO service is up in host : '{}' with id '{}', skipping starting of VDO service",                                 vds.getHostName(),                                 vds.getId());                            break;                     case UNKNOWN:                         log.info("VDO service is not installed host : '{}' with id '{}', ignoring to start VDO service",                                 vds.getHostName(),                                 vds.getId());                         break;                     }                 }             }         }     } Your Sincerely Mark Lee _______________________________________________ Devel mailing list -- devel(a)ovirt.org To unsubscribe send an email to devel-leave(a)ovirt.org Privacy Statement: https://www.ovirt.org/privacy-policy.html oVirt Code of Conduct: https://www.ovirt.org/community/about/community-guidelines/ List Archives: https://lists.ovirt.org/archives/list/devel@ovirt.org/message/36745S77NLH3K…

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Re: Host's status how to change to UP when I execute Management--> Active command
by Liran Rotenberg 05 Nov '20

05 Nov '20

Hi, The engine will monitor that host. Once it's reachable and we can get information from it the status will change accordingly. Please check out the HostMonitoring class. On Thu, Nov 5, 2020 at 11:57 AM lifuqiong(a)sunyainfo.com < lifuqiong(a)sunyainfo.com> wrote: > > Hi, > I checkout ovirt-engine's code with branch 4.2; When execute Host's > Management --> Active command, ovirt engine just set vds's status to > "Unassigned" but how the vds's status changed to "UP" in ovirt-engine? The > code in ActiveVdsCommand.executeCommand() as follows: > protected void executeCommand() { > > final VDS vds = getVds(); > try (EngineLock monitoringLock = acquireMonitorLock("Activate > host")) { > executionHandler.updateSpecificActionJobCompleted(vds.getId(), > ActionType.MaintenanceVds, false); > > setSucceeded(setVdsStatus(VDSStatus.Unassigned).getSucceeded()); > > if (getSucceeded()) { > TransactionSupport.executeInNewTransaction(() -> { > // set network to operational / non-operational > List<Network> networks = > networkDao.getAllForCluster(vds.getClusterId()); > networkClusterHelper.setStatus(vds.getClusterId(), > networks); > return null; > }); > > // Start glusterd service on the node, which would haven > been stopped due to maintenance > if (vds.getClusterSupportsGlusterService()) { > runVdsCommand(VDSCommandType.ManageGlusterService, > new GlusterServiceVDSParameters(vds.getId(), > Arrays.asList("glusterd"), "restart")); > // starting vdo service > GlusterStatus isRunning = > glusterUtil.isVDORunning(vds.getId()); > switch (isRunning) { > case DOWN: > log.info("VDO service is down in host : '{}' with > id '{}', starting VDO service", > vds.getHostName(), > vds.getId()); > startVDOService(vds); > break; > case UP: > log.info("VDO service is up in host : '{}' with > id '{}', skipping starting of VDO service", > vds.getHostName(), > vds.getId()); > break; > case UNKNOWN: > log.info("VDO service is not installed host : > '{}' with id '{}', ignoring to start VDO service", > vds.getHostName(), > vds.getId()); > break; > } > > } > } > } > } > > > Your Sincerely > Mark Lee > _______________________________________________ > Devel mailing list -- devel(a)ovirt.org > To unsubscribe send an email to devel-leave(a)ovirt.org > Privacy Statement: https://www.ovirt.org/privacy-policy.html > oVirt Code of Conduct: > https://www.ovirt.org/community/about/community-guidelines/ > List Archives: > https://lists.ovirt.org/archives/list/devel@ovirt.org/message/36745S77NLH3K… >

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Building lago from source
by Nir Soffer 05 Nov '20

05 Nov '20

I'm trying to test with ost: https://github.com/lago-project/lago/pull/815 So clone the project on the ost vm and built rpms: make make rpm The result is: lago-1.0.2-1.el8.noarch.rpm python3-lago-1.0.2-1.el8.noarch.rpm But the lago version installed by setup_for_ost.sh is: $ rpm -q lago lago-1.0.11-1.el8.noarch I tried to install lago from master, and then lago_init fail: $ lago_init /usr/share/ost-images/el8-engine-installed.qcow2 -k /usr/share/ost-images/el8_id_rsa Using images ost-images-el8-host-installed-1-202011021248.x86_64, ost-images-el8-engine-installed-1-202011021248.x86_64 containing ovirt-engine-4.4.4-0.0.master.20201031195930.git8f858d6c01d.el8.noarch vdsm-4.40.35.1-1.el8.x86_64 usage: lago [-h] [-l {info,debug,error,warning}] [--logdepth LOGDEPTH] [--version] [--out-format {default,flat,json,yaml}] [--prefix-path PREFIX_PATH] [--workdir-path WORKDIR_PATH] [--prefix-name PREFIX_NAME] [--ssh-user SSH_USER] [--ssh-password SSH_PASSWORD] [--ssh-tries SSH_TRIES] [--ssh-timeout SSH_TIMEOUT] [--libvirt_url LIBVIRT_URL] [--libvirt-user LIBVIRT_USER] [--libvirt-password LIBVIRT_PASSWORD] [--default_vm_type DEFAULT_VM_TYPE] [--default_vm_provider DEFAULT_VM_PROVIDER] [--default_root_password DEFAULT_ROOT_PASSWORD] [--lease_dir LEASE_DIR] [--reposync-dir REPOSYNC_DIR] [--ignore-warnings] VERB ... lago: error: unrecognized arguments: --ssh-key /home/nsoffer/src/ovirt-system-tests/deployment-basic-suite-master /home/nsoffer/src/ovirt-system-tests/basic-suite-master/LagoInitFile Do we use a customized lago version for ost? Where is the source? Nir

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Host's status how to change to UP when I execute Management--> Active command
by lifuqiong＠sunyainfo.com 05 Nov '20

05 Nov '20

Hi, I checkout ovirt-engine's code with branch 4.2; When execute Host's Management --> Active command, ovirt engine just set vds's status to "Unassigned" but how the vds's status changed to "UP" in ovirt-engine? The code in ActiveVdsCommand.executeCommand() as follows: protected void executeCommand() { final VDS vds = getVds(); try (EngineLock monitoringLock = acquireMonitorLock("Activate host")) { executionHandler.updateSpecificActionJobCompleted(vds.getId(), ActionType.MaintenanceVds, false); setSucceeded(setVdsStatus(VDSStatus.Unassigned).getSucceeded()); if (getSucceeded()) { TransactionSupport.executeInNewTransaction(() -> { // set network to operational / non-operational List<Network> networks = networkDao.getAllForCluster(vds.getClusterId()); networkClusterHelper.setStatus(vds.getClusterId(), networks); return null; }); // Start glusterd service on the node, which would haven been stopped due to maintenance if (vds.getClusterSupportsGlusterService()) { runVdsCommand(VDSCommandType.ManageGlusterService, new GlusterServiceVDSParameters(vds.getId(), Arrays.asList("glusterd"), "restart")); // starting vdo service GlusterStatus isRunning = glusterUtil.isVDORunning(vds.getId()); switch (isRunning) { case DOWN: log.info("VDO service is down in host : '{}' with id '{}', starting VDO service", vds.getHostName(), vds.getId()); startVDOService(vds); break; case UP: log.info("VDO service is up in host : '{}' with id '{}', skipping starting of VDO service", vds.getHostName(), vds.getId()); break; case UNKNOWN: log.info("VDO service is not installed host : '{}' with id '{}', ignoring to start VDO service", vds.getHostName(), vds.getId()); break; } } } } } Your Sincerely Mark Lee

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Re: [ovirt-users] Re: Removal of dpdk
by Dominik Holler 04 Nov '20

04 Nov '20

Hi Florian, thanks for your thoughts! On Tue, Nov 3, 2020 at 3:21 PM Florian Schmid via Users <users(a)ovirt.org> wrote: > Hi Ales, > > what do you mean with "not maintained for a long time"? > The oVirt integration of dpdk was not maintained. > DPDK is heavily developed and make the linux network extremely fast. > > I don't think, that SR-IOV can replace it, > The removal of dpdk is about removing the dpdk support from oVirt hosts only. We wonder if there is someone using dpdk to attach oVirt VMs to physical NICs. We are aware that many users use SR-IOV, especially for scenarios of enabling a high count of Ethernet frames for VMs or requiring a low latency, but we are not aware of users using dpdk to connect the oVirt VMs to the physical NICs of the host. > because packets must be still processed by the kernel, which is really > slow and CPU demanding. > In SR-IOV the packets might be processed by the guest kernel, not but the host kernel. oVirt is focused on the host kernel, while the guest OS is managed by the user of oVirt. Did this explanation address your concerns? BR Florian > > ------------------------------ > *Von: *"Ales Musil" <amusil(a)redhat.com> > *An: *"Nir Soffer" <nsoffer(a)redhat.com> > *CC: *"users" <users(a)ovirt.org>, "devel" <devel(a)ovirt.org> > *Gesendet: *Dienstag, 3. November 2020 13:56:12 > *Betreff: *[ovirt-users] Re: Removal of dpdk > > > > On Tue, Nov 3, 2020 at 1:52 PM Nir Soffer <nsoffer(a)redhat.com> wrote: > >> On Tue, Nov 3, 2020 at 1:07 PM Ales Musil <amusil(a)redhat.com> wrote: >> >>> Hello, >>> we have decided to remove dpdk in the upcoming version of oVirt namely >>> 4.4.4. Let us know if there are any concerns about this. >>> >> >> Can you give more info why we want to remove this feature, and what is >> the replacement for existing users? >> >> Nir >> > > Sure, > the feature was only experimental and not maintained for a long time. The > replacement is to use SR-IOV > which is supported by oVirt. > > Thanks, > Ales > > > -- > > Ales Musil > > Software Engineer - RHV Network > > Red Hat EMEA <https://www.redhat.com> > > amusil(a)redhat.com IM: amusil > <https://red.ht/sig> > > _______________________________________________ > Users mailing list -- users(a)ovirt.org > To unsubscribe send an email to users-leave(a)ovirt.org > Privacy Statement: https://www.ovirt.org/privacy-policy.html > oVirt Code of Conduct: > https://www.ovirt.org/community/about/community-guidelines/ > List Archives: > https://lists.ovirt.org/archives/list/users@ovirt.org/message/3FHIRQKEEKLGW… > _______________________________________________ > Users mailing list -- users(a)ovirt.org > To unsubscribe send an email to users-leave(a)ovirt.org > Privacy Statement: https://www.ovirt.org/privacy-policy.html > oVirt Code of Conduct: > https://www.ovirt.org/community/about/community-guidelines/ > List Archives: > https://lists.ovirt.org/archives/list/users@ovirt.org/message/ZCAYTHVZPOZF3… > >

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Libvirt driver iothread property for virtio-scsi disks
by Nir Soffer 04 Nov '20

04 Nov '20

The docs[1] say: - The optional iothread attribute assigns the disk to an IOThread as defined by the range for the domain iothreads value. Multiple disks may be assigned to the same IOThread and are numbered from 1 to the domain iothreads value. Available for a disk device target configured to use "virtio" bus and "pci" or "ccw" address types. Since 1.2.8 (QEMU 2.1) Does it mean that virtio-scsi disks do not use iothreads? I'm experiencing a horrible performance using nested vms (up to 2 levels of nesting) when accessing NFS storage running on one of the VMs. The NFS server is using scsi disk. My theory is: - Writing to NFS server is very slow (too much nesting, slow disk) - Not using iothreads (because we don't use virtio?) - Guest CPU is blocked by slow I/O Does this make sense? [1] https://libvirt.org/formatdomain.html#hard-drives-floppy-disks-cdroms Nir

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Re: [ovirt-users] Re: Removal of dpdk
by Ales Musil 03 Nov '20

03 Nov '20

On Tue, Nov 3, 2020 at 3:17 PM Florian Schmid <fschmid(a)ubimet.com> wrote: > Hi Ales, > > what do you mean with "not maintained for a long time"? > DPDK is heavily developed and make the linux network extremely fast. > > I don't think, that SR-IOV can replace it, because packets must be still > processed by the kernel, which is really slow and CPU demanding. > > BR Florian > > ------------------------------ > *Von: *"Ales Musil" <amusil(a)redhat.com> > *An: *"Nir Soffer" <nsoffer(a)redhat.com> > *CC: *"users" <users(a)ovirt.org>, "devel" <devel(a)ovirt.org> > *Gesendet: *Dienstag, 3. November 2020 13:56:12 > *Betreff: *[ovirt-users] Re: Removal of dpdk > > > The dpdk inside oVirt is not maintained, of course that dpdk as technology/project is still developed. > > On Tue, Nov 3, 2020 at 1:52 PM Nir Soffer <nsoffer(a)redhat.com> wrote: > >> On Tue, Nov 3, 2020 at 1:07 PM Ales Musil <amusil(a)redhat.com> wrote: >> >>> Hello, >>> we have decided to remove dpdk in the upcoming version of oVirt namely >>> 4.4.4. Let us know if there are any concerns about this. >>> >> >> Can you give more info why we want to remove this feature, and what is >> the replacement for existing users? >> >> Nir >> > > Sure, > the feature was only experimental and not maintained for a long time. The > replacement is to use SR-IOV > which is supported by oVirt. > > Thanks, > Ales > > > -- > > Ales Musil > > Software Engineer - RHV Network > > Red Hat EMEA <https://www.redhat.com> > > amusil(a)redhat.com IM: amusil > <https://red.ht/sig> > > _______________________________________________ > Users mailing list -- users(a)ovirt.org > To unsubscribe send an email to users-leave(a)ovirt.org > Privacy Statement: https://www.ovirt.org/privacy-policy.html > oVirt Code of Conduct: > https://www.ovirt.org/community/about/community-guidelines/ > List Archives: > https://lists.ovirt.org/archives/list/users@ovirt.org/message/3FHIRQKEEKLGW… > -- Ales Musil Software Engineer - RHV Network Red Hat EMEA <https://www.redhat.com> amusil(a)redhat.com IM: amusil <https://red.ht/sig>

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Removal of dpdk
by Ales Musil 03 Nov '20

03 Nov '20

Hello, we have decided to remove dpdk in the upcoming version of oVirt namely 4.4.4. Let us know if there are any concerns about this. Thank you. Regards, Ales Musil -- Ales Musil Software Engineer - RHV Network Red Hat EMEA <https://www.redhat.com> amusil(a)redhat.com IM: amusil <https://red.ht/sig>

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ovirt-engine has been tagged (ovirt-engine-4.4.3.10)
by Tal Nisan 02 Nov '20

02 Nov '20

1 0