I read the VMWare page. AFAICT they are not saying that a VM can be spread across multiple physical hosts. A "resource pool" appears to be a quota pool. They are using a quota model somewhat like the kube-arbitrator <https://github.com/kubernetes-incubator/kube-arbitrator>, where quota is a guaranteed minimum (rather than a maximum like Kubernetes ResourceQuota), and they're saying that if there is unused quota in some pool, then it becomes available to other pools on a temporary basis. So a VM may be drawing resources (quota) from multiple resource (quota) pools, but the VM is only actually running on a single physical host.
At least, that's my reading of the page. On Thu, Feb 15, 2018 at 9:16 AM, 'Tim Hockin' via Kubernetes user discussion and Q&A <kubernetes-users@googlegroups.com> wrote: > I don't know VMWare either, but that seems disastrous from a > predictability point of view. > > On Wed, Feb 14, 2018 at 8:02 PM, Warren Strange > <warren.stra...@gmail.com> wrote: > > > > AFAIK you can not split a pod between more than one node. > > > > I know nothing about VMware, but I am guessing they can split VM > processes > > across nodes, which is pretty much equivalent to what Kubernetes does > with > > pods (VM process == a pod, roughly speaking). > > > > > > > > On Wednesday, February 14, 2018 at 8:04:30 PM UTC-7, chez wrote: > >> > >> Folks, > >> Looks like VMware with vsphere (and vcenter?) is able to allocate > >> resources (vcpu for instance) across hosts for a single VM ? Is this > >> possible with kubernetes for containers ? > >> Can kubernetes pool vcpu between multiple hosts/nodes for one container > ? > >> > >> https://pubs.vmware.com/vsphere-4-esx-vcenter/index. > jsp?topic=/com.vmware.vsphere.intro.doc_41/c_hosts_clusters_ > and_resource_pools.html > >> > >> I am really intrigued by this statement - > >> "You can dynamically change resource allocation policies. For example, > at > >> year end, the workload on Accounting increases, and which requires an > >> increase in the Accounting resource pool reserve of 4GHz of power to > 6GHz. > >> You can make the change to the resource pool dynamically without > shutting > >> down the associated virtual machines." > >> > >> Each physical host is 4Ghz, but this doc says it can pull 2Ghz out of > the > >> second host. Is it because of ESXi ? > >> > >> thanks > >> > > -- > > You received this message because you are subscribed to the Google Groups > > "Kubernetes user discussion and Q&A" group. > > To unsubscribe from this group and stop receiving emails from it, send an > > email to kubernetes-users+unsubscr...@googlegroups.com. > > To post to this group, send email to kubernetes-users@googlegroups.com. > > Visit this group at https://groups.google.com/group/kubernetes-users. > > For more options, visit https://groups.google.com/d/optout. > > -- > You received this message because you are subscribed to the Google Groups > "Kubernetes user discussion and Q&A" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to kubernetes-users+unsubscr...@googlegroups.com. > To post to this group, send email to kubernetes-users@googlegroups.com. > Visit this group at https://groups.google.com/group/kubernetes-users. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Kubernetes user discussion and Q&A" group. To unsubscribe from this group and stop receiving emails from it, send an email to kubernetes-users+unsubscr...@googlegroups.com. To post to this group, send email to kubernetes-users@googlegroups.com. Visit this group at https://groups.google.com/group/kubernetes-users. For more options, visit https://groups.google.com/d/optout.
