Re: Clusters run virtual machines or Red Hat Gluster Storage Servers
OVirt + Gluster is called 'Hyperconverged' setup and it supports only replica3 or a 'replica3 arbiter1' volumes. Vmware VSAN is another popular Hyperconverged Setup but requires a lot of licenses. The CPU and Disk resources are plenty on virtualization Hosts and this setup allows you to save space by removal of the iSCSI/NFS/SAN dedicated system. The setup is quite popular and it works quite well, but requires a 10G network (as load balancing smaller NICs is very hard ) - if performance is required, while even a 1 gbit/s NIC is possible to be used. Note: 1gbit/s will provide no more than 87 MB/s on gluster level for all your VMs , which is very poor. If you have 4 hosts -> one of them will not be in the gluster setup, or you will have 2 separate gluster volumes like this: oVirt1- Replica for volume A oVirt2- Replica for volume A , arbiter for volume B oVirt3 - Replica for volume B,arbiter for volume A oVirt4 - Replica for volume B Then you add them as hosts in your oVirt setup. Best Regards, Strahil NikolovOn Jun 10, 2019 05:29, xilazz@126.com wrote:
Hi, everybody. When I was looking at the administrator's manual, it prompted Clusters run virtual machines or Red Hat Gluster Storage Servers. These two purposes are mad exclusive: Virtualization and storage hosts together. When I configured the cluster, I said that the glusterfs and virt I saw were alternatives to the two checkboxes. I would like to ask what happens when glusterfs and virt are in the same cluster? How can I use hosted engine when I have four nodes? Thank you very much for your reply. _______________________________________________ Users mailing list -- users@ovirt.org To unsubscribe send an email to users-leave@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/CZR73TNWNRE5LO...
Thank you very much for your reply. Configuring two glusterfs volumes is a great solution. The scheme I tested so far is that three machines do glusterfs, the fourth machine only does virt, and four machines are in a cluster. There is a problem at present, according to the theory, the maximum number of downtime can be two, as the ovirt4 node of virt is no problem, and then one of ovirt1-3 is down, and the glusterfs volume can no longer be used. Only after removing ovirt4 from the gluster cluster (gluster peer detach ovirt4) can the volume be used. May I ask if my plan is ok? Ovirt4 does not participate in glusterfs xilazz@126.com From: Strahil Date: 2019-06-10 12:00 To: xilazz; users Subject: Re: [ovirt-users] Clusters run virtual machines or Red Hat Gluster Storage Servers OVirt + Gluster is called 'Hyperconverged' setup and it supports only replica3 or a 'replica3 arbiter1' volumes. Vmware VSAN is another popular Hyperconverged Setup but requires a lot of licenses. The CPU and Disk resources are plenty on virtualization Hosts and this setup allows you to save space by removal of the iSCSI/NFS/SAN dedicated system. The setup is quite popular and it works quite well, but requires a 10G network (as load balancing smaller NICs is very hard ) - if performance is required, while even a 1 gbit/s NIC is possible to be used. Note: 1gbit/s will provide no more than 87 MB/s on gluster level for all your VMs , which is very poor. If you have 4 hosts -> one of them will not be in the gluster setup, or you will have 2 separate gluster volumes like this: oVirt1- Replica for volume A oVirt2- Replica for volume A , arbiter for volume B oVirt3 - Replica for volume B,arbiter for volume A oVirt4 - Replica for volume B Then you add them as hosts in your oVirt setup. Best Regards, Strahil NikolovOn Jun 10, 2019 05:29, xilazz@126.com wrote:
Hi, everybody. When I was looking at the administrator's manual, it prompted Clusters run virtual machines or Red Hat Gluster Storage Servers. These two purposes are mad exclusive: Virtualization and storage hosts together. When I configured the cluster, I said that the glusterfs and virt I saw were alternatives to the two checkboxes. I would like to ask what happens when glusterfs and virt are in the same cluster? How can I use hosted engine when I have four nodes? Thank you very much for your reply. _______________________________________________ Users mailing list -- users@ovirt.org To unsubscribe send an email to users-leave@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/CZR73TNWNRE5LO...
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