- Users - oVirt List Archives

Re: oVirt and Containers
by Jan Zmeskal 26 Dec '19

26 Dec '19

Okay, so this topic is quite vast, but I believe I can at the very least give you a few pointers and maybe others might chime in as well. Firstly, there's the Kubevirt project. It enables you to manage both application containers and virtual machines workloads (that cannot be easily containerized) in a shared environment. Another benefit is getting advantages of the powerful Kubernetes scheduler. I myself am not too familiar with Kubevirt, so I can only offer this high-level overview. More info here: https://kubevirt.io/ Then there is another approach which I am more familiar with. You might want to use oVirt as an infrastructure layer on top of which you run containerized workflow. This is achieved by deploying either OpenShift <https://www.openshift.com/> or the upstream project OKD <https://www.okd.io/> in the oVirt virtual machines. In that scenario, oVirt VMs are considered by OpenShift as compute resources and are used for scheduling containers. There are some advantages to this setup and two come into mind. Firstly, you can scale such OpenShift cluster up or down by adding/removing oVirt VMs according to your needs. Secondly, you don't need to set up all of this yourself. For OpenShift 3, Red Hat provides detailed guide on how to go about this. Part of that guide are Ansible playbooks that automate the deployment for you as long as you provide required variables. More info here: https://docs.openshift.com/container-platform/3.11/install_config/configuri… When it comes to OpenShift 4, there are two types of deployment. There's UPI - user provisioned infrastructure. In that scenario, you prepare all the resources for OpenShift 4 beforehand and deploy it in that existing environment. And there's also IPI - installer provisioned infrastructure. This means that you just give the installer access to your environment (e.g. AWS public cloud) and the installer provisions resources for itself based on recommendations and best practices. At this point, neither UPI nor IPI is supported for oVirt. However there is a GitHub repository <https://github.com/sa-ne/openshift4-rhv-upi> that can guide you through UPI installation on oVirt and also provides automation playbooks for that. I have personally followed the steps from the repository and deployed OpenShift 4.2 on top of oVirt without any major issues. As far as I remember, I might have needed occasional variable here and there but the process worked. Hope this helps! Jan On Tue, Dec 24, 2019 at 8:21 PM Robert Webb <rwebb(a)ropeguru.com> wrote: > Hi Jan, > > Honestly, I didn't have anything specific in mind, just what is being used > out there today and what may be more prevalent. > > Just getting my oVIrt set up and want to know what might be recommended. > Would probably be mostly deploying images like Homeassistent, piHole, etc.. > for now. > > I guess if there is good oVirt direct integration, it would be nice to > keep it all in a single interface. > > Thanks.. > > ________________________________________ > From: Jan Zmeskal <jzmeskal(a)redhat.com> > Sent: Tuesday, December 24, 2019 1:54 PM > To: Robert Webb > Cc: users > Subject: Re: [ovirt-users] oVirt and Containers > > Hi Robert, > > there are different answers based on what you mean by integrating oVirt > and containers. Do you mean: > > - Installing container management (Kubernetes or OpenShift) on top of > oVirt and using oVirt as infrastructure? > - Managing containers from oVirt interface? > - Running VM workloads inside containers? > - Something different? > > I can elaborate more based on your specific needs > > Best regards > Jan > > On Tue, Dec 24, 2019 at 3:52 PM Robert Webb <rwebb(a)ropeguru.com<mailto: > rwebb(a)ropeguru.com>> wrote: > I was searching around to try and figure out the best way to integrate > oVirt and containers. > > I have found some sites that discuss it but all of them are like 2017 and > older. > > Any recommendations? > > Just build VM’s to host containers or is there some direct integration? > > Here are a couple of the old sites > > https://fromanirh.github.io/containers-in-ovirt.html > > > https://kubernetes.io/docs/setup/production-environment/on-premises-vm/ovir… > > > https://www.ovirt.org/develop/release-management/features/integration/conta… > _______________________________________________ > Users mailing list -- users(a)ovirt.org<mailto:users@ovirt.org> > To unsubscribe send an email to users-leave(a)ovirt.org<mailto: > users-leave(a)ovirt.org> > Privacy Statement: https://www.ovirt.org/site/privacy-policy/ > oVirt Code of Conduct: > https://www.ovirt.org/community/about/community-guidelines/ > List Archives: > https://lists.ovirt.org/archives/list/users@ovirt.org/message/7BIW2Z3ILBSAG… > > > -- > > Jan Zmeskal > > Quality Engineer, RHV Core System > > Red Hat <https://www.redhat.com> > > [ > https://marketing-outfit-prod-images.s3-us-west-2.amazonaws.com/f5445ae0c9d… > ]<https://www.redhat.com> > > -- Jan Zmeskal Quality Engineer, RHV Core System Red Hat <https://www.redhat.com> <https://www.redhat.com>

2 1

Overt-Engine Down | Host Unresponsive
by Vijay Sachdeva 26 Dec '19

26 Dec '19

Dear Team, I have one question, if Ovirt-engine goes down for some reason. Will it impact my host to go un-responsive and all VMs down? I just faced a situation where my host was in un-responsive status and all VMs were down. I restart the ovirt-engine service and host got activated. Can anyone let me know this situation? Thanks Vijay Sachdeva

2 1

oVirt on a dedicated server with a single NIC and IP
by alexcustos＠gmail.com 26 Dec '19

26 Dec '19

Hi, My goal is to set up the latest oVirt on a dedicated server (Hetzner) with a single NIC and IP. Then using a Reverse Proxy and/or VPN (on the same host) to manage connections to VMs. I expected I could add a subnet as an alias to the main interface, or set it up on VLAN, or using vSwitch at the last resort, but all my attempts failed. Some configurations work until the first reboot, then VDSM screw up the main interface and I lost connection to the server, or Hosted Engine doesn't start from global maintenance. I've run out of good ideas already. I'm extremely sorry if this question already been discussed somewhere, but I found nothing helpful. I would be very appreciated for any hint on how to achieve this or at least a confirmation that the desired configuration is viable.

2 2

Overt Node | Non-Responsive
by Vijay Sachdeva 26 Dec '19

26 Dec '19

Dear Team, I have a host on which I am using local storage for my VMs. Now I rebooted my host because it was shifted to another location, right now in vdsm logs I see errors like: Where in host I can see my mounted LVM volume is perfectly fine. I started VSDM services and libvirtd, but host is not leaving Non-Responsive state. Any help ..!! Vijay Sachdeva

1 0

Re: [ovirt 4.2]vdsm host was shutdown unexpectly, configure of some vms was changed or lost when host was re-powered on and vm was started
by Strahil 25 Dec '19

25 Dec '19

Hi, If the VMs are starting properly and they don't use cloudinit - then the issue is not oVirt specific, but guest specific (Linux/Windows depending on guest OS). So your should check: 1. Does your host have any Netwprks out of sync (Host's network tab) If yes - put the server into maintenance and fix the issue (host's network tab) 2. Check each VM's configuration if it is defined to use CloudInit -> if yes, verify that cloudinit's service is running on the guest 3. Verify each problematic guest's network settings. If needed, set a static IP and try to ping another IP from the same subnet/Vlan . Best Regards, Strahil NikolovOn Dec 25, 2019 11:41, lifuqiong(a)sunyainfo.com wrote: >> >> >>> Dear All: >>> My ovirt engine managed two vdsms with nfs storage on another nfs server, it worked fine about three months. >>> One of host (host_1.3; ip:172.18.1.3) was created about 16 vms, but the host_1.3 was shutdown unexpectly about 2019-12-23 16:11, when re-started host and vms; half of the vms was lost some configure or changed , such as lost theirs ip etc.(the vm name is 'zzh_Chain49_ACG_M' in the vdsm.log) >>> >>> the vm zzh_Chain49_ACG_M was create by rest API through vm's templated . the template is 20.1.1.161; the vm zzh_Chain49_ACG_M was created by ovirt rest api and changed the ip to 20.1.1.219 >>> by ovirt rest api. But the ip was changed to templated ip when the accident happened. >>> >>> the vm's os is centos. >>> >>> Hope get help from you soon, Thank you. >>> >>> Mark >>> Sincerely.

1 0

[ovirt 4.2]vdsm host was shutdown unexpectly, configure of some vms was changed or lost when host was re-powered on and vm was started
by lifuqiong＠sunyainfo.com 25 Dec '19

25 Dec '19

Dear All: My ovirt engine managed two vdsms with nfs storage on another nfs server, it worked fine about three months. One of host (host_1.3; ip:172.18.1.3) was created about 16 vms, but the host_1.3 was shutdown unexpectly about 2019-12-23 16:11, when re-started host and vms; half of the vms was lost some configure or changed , such as lost theirs ip etc.(the vm name is 'zzh_Chain49_ACG_M' in the vdsm.log) the vm zzh_Chain49_ACG_M was create by rest API through vm's templated . the template is 20.1.1.161; the vm zzh_Chain49_ACG_M was created by ovirt rest api and changed the ip to 20.1.1.219 by ovirt rest api. But the ip was changed to templated ip when the accident happened. the vm's os is centos. Hope get help from you soon, Thank you. Mark Sincerely.

1 0

Re: Subscribe to mailing list and install oVirt with freeIPA
by Yedidyah Bar David 25 Dec '19

25 Dec '19

On Wed, Dec 25, 2019 at 10:45 AM Kien Pham <ptkcc(a)outlook.com> wrote: > > Dear oVirt team, > > I have post a thread on forum but I got problem with mailing list. How can I subscribe the mailing list. > > This is the question. > > Dear all, > > I am installing oVirt but I got an error when running engine-setup and get the following notification: > > [ INFO ] Restarting httpd > [ ERROR ] Failed to execute stage 'Closing up': Failed to start service 'httpd' > [ INFO ] Stage: Clean up > Log file is located at /var/log/ovirt-engine/setup/ovirt-engine-setup-20191224111455-ppsefr.log > [ INFO ] Generating answer file '/var/lib/ovirt-engine/setup/answers/20191224111745-setup.conf' > [ INFO ] Stage: Pre-termination > [ INFO ] Stage: Termination > [ ERROR ] Execution of setup failed > > I think that the problem is freeIPA. I installed freeIPA to manage user authetication. But IPA is currently using port 80 so httpd service cannot start. Right. This isn't supported, for exactly this reason. The ovirt-engine rpm conflicts with ipa-server. How did you install it? I now see that there is also a package python2-ipaserver, and in fedora and el8 also python3-ipaserver. Now pushed a patch to conflict with them as well: https://gerrit.ovirt.org/105935 Anyway, you'll have to set them up on two different machines. Thanks for the report, and sorry for the failure... Good luck and best regards, -- Didi

1 0

Re: oVirt and Containers
by Jan Zmeskal 24 Dec '19

24 Dec '19

Hi Robert, there are different answers based on what you mean by integrating oVirt and containers. Do you mean: - Installing container management (Kubernetes or OpenShift) on top of oVirt and using oVirt as infrastructure? - Managing containers from oVirt interface? - Running VM workloads inside containers? - Something different? I can elaborate more based on your specific needs Best regards Jan On Tue, Dec 24, 2019 at 3:52 PM Robert Webb <rwebb(a)ropeguru.com> wrote: > I was searching around to try and figure out the best way to integrate > oVirt and containers. > > > > I have found some sites that discuss it but all of them are like 2017 and > older. > > > > Any recommendations? > > > > Just build VM’s to host containers or is there some direct integration? > > > > Here are a couple of the old sites > > > > https://fromanirh.github.io/containers-in-ovirt.html > > > > > https://kubernetes.io/docs/setup/production-environment/on-premises-vm/ovir… > > > > > https://www.ovirt.org/develop/release-management/features/integration/conta… > _______________________________________________ > Users mailing list -- users(a)ovirt.org > To unsubscribe send an email to users-leave(a)ovirt.org > Privacy Statement: https://www.ovirt.org/site/privacy-policy/ > oVirt Code of Conduct: > https://www.ovirt.org/community/about/community-guidelines/ > List Archives: > https://lists.ovirt.org/archives/list/users@ovirt.org/message/7BIW2Z3ILBSAG… > -- Jan Zmeskal Quality Engineer, RHV Core System Red Hat <https://www.redhat.com> <https://www.redhat.com>

2 1

Subscribe to mailing list and install oVirt with freeIPA
by Kien Pham 24 Dec '19

24 Dec '19

Dear oVirt team, I have post a thread on forum but I got problem with mailing list. How can I subscribe the mailing list. This is the question. Dear all, I am installing oVirt but I got an error when running engine-setup and get the following notification: [ INFO ] Restarting httpd [ ERROR ] Failed to execute stage 'Closing up': Failed to start service 'httpd' [ INFO ] Stage: Clean up Log file is located at /var/log/ovirt-engine/setup/ovirt-engine-setup-20191224111455-ppsefr.log [ INFO ] Generating answer file '/var/lib/ovirt-engine/setup/answers/20191224111745-setup.conf' [ INFO ] Stage: Pre-termination [ INFO ] Stage: Termination [ ERROR ] Execution of setup failed I think that the problem is freeIPA. I installed freeIPA to manage user authetication. But IPA is currently using port 80 so httpd service cannot start. Is there any suggest. Thank for all reply. Best regards. Kimloai.

1 0

Re: ovirt 4.3.7 + Gluster in hyperconverged (production design)
by Strahil 24 Dec '19

24 Dec '19

On Dec 24, 2019 02:18, Jayme <jaymef(a)gmail.com> wrote: > > If you can afford it I would definitely do raid. Being able to monitor and replace disks at the raid level is much easier than brick. With raid I’d do a gluster arbiter setup so your aren’t losing too much space. > > Keep an eye on libgfapi. It’s not default setting due to a few bugs but I’ve been testing it in my ssd hci cluster and have been seeing up to 5x io improvement. Also jumbo frames on those 10Gbps switches. > > Someone else will probably chime in re the other questions. I believe the GUI can only deploy a three sever cluster then you have to add the remaining hosts afterward. > > On Mon, Dec 23, 2019 at 5:56 PM <adrianquintero(a)gmail.com> wrote: >> >> Hi, >> After playing a bit with oVirt and Gluster in our pre-production environment for the last year, we have decided to move forward with a our production design using ovirt 4.3.7 + Gluster in a hyperconverged setup. >> >> For this we are looking get answers to a few questions that will help out with our design and eventually lead to our production deployment phase: >> >> Current HW specs (total servers = 18): >> 1.- Server type: DL380 GEN 9 >> 2.- Memory: 256GB >> 3.-Disk QTY per hypervisor: >> - 2x600GB SAS (RAID 0) for the OS I would pick Raid1 and split that between OS and brick for engine 's gluster volume >> - 9x1.2TB SSD (RAID[0, 6..]..? ) for GLUSTER. If you had bigger NICs I would preffer RAID0. Have you considered JBOD approach (each disk is presented as a standalone LUN from the raid array) ? Raid 6 is waste for your SSDs (when you already have replica 3 volumes). Ask HPE to provide SSDs from different manufacturing batches. I think that with SSD thee best compromise will be RAID 5 with replica3 for faster reads. As the SSDs will be overwritten with the same ammount of data, there could be a situation where all 3 from a replica set will be in predictive failiure (which is not nice) - that's why a raid 5 is a good option. >> 4.-Network: >> - Bond1: 2x10Gbps >> - Bond2: 2x10Gbps (for migration and gluster) Do not use Active-Backup bond as you will loose bandwidth. LACP (with hashing on layer 3+ layer4) is a good option, but it depends if your machines will be in the same LAN segment (communicating over layer 2 and no gateway inbetween). >> Our plan is to build 2x9 node clusters, however the following questions come up: >> >> 1.-Should we build 2 separate environments each with its own engine? or should we do 1 engine that will manage both clusters? If you decide to split - you have less fault tollerance - for example loosing 3 ot of 18 is better than loosing 3 out of 9 nodes :) >> 2.-What would be the best gluster volume layout for #1 above with regards to RAID configuration: >> - JBOD or RAID6 or…?. RAID6 wastes alot of space >> - what is the benefit or downside of using JBOD vs RAID 6 for this particular scenario? >> 3.-Would you recommend Ansible-based deployment (if supported)? If yes where would I find the documentation for it? or should we just deploy using the UI?. There is a topic in the mailing list about issues with ansible.It's up to you. >> - I have reviewed the following and in Chapter 5 it only mentions Web UI https://access.redhat.com/documentation/en-us/red_hat_hyperconverged_infras… >> - Also looked at https://github.com/gluster/gluster-ansible/tree/master/playbooks/hc-ansible… but could not get it to work properly. >> >> 4.-what is the recommended max server qty in a hyperconverged setup with gluster, 12, 15, 18...? I don't remmember but I think it was 9 nodes for Hyperconverged setup in RHV. >> Thanks, >> >> Adrian Best Regards, Strahil Nikolov

1 0