Hi Jimmy, Compute offerings are either fixed or custom (constrained / unconstrained). Fixed offerings do not allow manipulation of the VM specs once it has been assigned. You can, however, change the offering by using the scaleVirtualMachine API command[1]. If you wish, you can also use custom constrained or unconstrained offerings. These allow for the modification of VM specs (within bounds). When you use createServiceOffering[2] and if you pass customized=true you can make an unconstrained custom offering. If you pass mincpunumber, maxcpunumber, miniops, maxiops, minmemory and maxmemory you constrain the offering to your min/max specifications. These parameters are also configured in the UI at "Compute Offering Type". For more info see the API docs. When you enable dynamic scaling you can live scale a VM. This does however require the kernel to be aware of this[4][5]. This can be scripted.
You can add a NIC to a VM without any issue. My knowledge of this is limited to KVM. I expect this to also work in other environments. See addNicToVirtualMachine[3]. This is can also be done in the UI: Compute -> Instances -> select an instance -> NICs -> Add network to VM. [1] https://cloudstack.apache.org/api/apidocs-4.18/apis/scaleVirtualMachine.html [2] https://cloudstack.apache.org/api/apidocs-4.18/apis/createServiceOffering.html [3] https://cloudstack.apache.org/api/apidocs-4.18/apis/addNicToVirtualMachine.html [4] https://docs.kernel.org/core-api/cpu_hotplug.html [5] https://www.kernel.org/doc/html/next/admin-guide/mm/memory-hotplug.html Met vriendelijke groet / Kind regards, Ruben Bosch CLDIN > On 3 Nov 2023, at 17:50, Jimmy Huybrechts <ji...@linservers.com> wrote: > > Hi, > > Since I have both my system vm’s running now I can test with other things > like the instances and such. > > I noticed a few things though which maybe I cannot find or maybe is by design? > > - If I create a compute offering I can’t adjust most of it afterwards without > deleting and recreating it. > - On one occasion I wanted to add a nic to an instance and noticed this is > not possible? That’s a real bummer since that would mean such a simple thing > as adding a nic is not possible without completely recreating the instance, > or am I missing something? > > -- > Jimmy
