Unless CloudStack has a way to automatically attach iSCSI storage to each virtual machine directly then a clustered filesystem (C-LVM or OCFS2) is needed to store the VM data as it is the only way to have all compute hosts to have access to the same data for live migrations and HA when using iSCSI SANs. At least that's my understanding.
I was comparing clustered file systems on Hyper-V (CSV) and Linux (C-LVM or OCFS2) and why Hyper-V has excellent support for it. One of the reasons we use Hyper-V Server is this feature but to us a hypervisor is replaceable, the reliability of the virtual machines within is not. Thank you Pieter On 4 March 2021 at 20:51, Andrija Panic <andrija.pa...@gmail.com> wrote: Struggling to understand why you are mentioning a clustered filesystem on Linux? (but I do agree all of them are to be avoided, 99% of the time) On Tue, 2 Mar 2021 at 17:25, Pieter Koorts <pieter.koo...@me.com.invalid> wrote: We currently use Hyper-V with an iSCSI SAN since Hyper-V does excellent at fast shared storage with Windows CSV. The system is reliable but very inflexible to changes in strategies when deploying workloads. Moving to Linux as a hypervisor isn't too much of an issue as we do use Ubuntu 20.x for many of our workloads just that the only clustered storage options for Linux is either Clustered LVM or OCFS2 Never used any "modern" form of OCFS2 deployment so cannot say anything regarding it's performance or reliability but past experiences with Clustered LVM makes me shudder. Had a few machines silently corrupt with Clustered LVM. Thank you Pieter On 2 March 2021 at 15:38, Andrija Panic <andrija.pa...@gmail.com> wrote: It goes without saying that once a big company get's interest in i.e. Hyper-V and sponsors the needed development - that is usually a time when such a huge feature goes in ACS. Do you need any recommendations from real-life on what to go with, in the CloudStack world? Best, On Tue, 2 Mar 2021 at 14:06, Pieter Koorts <pieter.koo...@me.com.invalid> wrote: That is a pity. Hyper-V Server 2019 for example is excellent with great enterprise software support like backup facilities, clustered filesystem (iSCSI SAN's, etc). Suppose unless there is traction like with OpenStack (with Hyper-V support), getting the time and developers to deal with it in CloudStack will be hard. Will continue my CloudStack research and the options available. Thank you Pieter On 2 March 2021 at 12:49, Andrija Panic <andrija.pa...@gmail.com> wrote: Unfortunately, I don't thinking CloudStack actually supports (in reality) hyper-v any more - there was the original implementation for Hyper V 2012, but not sure it works any more, at all (and the "VM import" option is available only for VMware, not any other hypervisor, atm) Best, On Wed, 24 Feb 2021 at 11:16, Pieter Koorts <pieter.koo...@me.com.invalid> wrote: Been searching a myriad of places but can't find any concrete information about this. From what I understand CloudStack can be implemented on top of an existing vSphere installation and machines imported into CloudStacks control. Is the same thing possible on a Hyper-V cluster by chance? Thank you Pieter -- Andrija Panić -- Andrija Panić -- Andrija Panić
