One of the things I miss in Proxmox is when I use the KVM is there is no dynamic disk option, know that in professional virtualization systems such as the Proxmox, XenServer, VMware indicated this is not something to be done, however some often ends up being a necessity for the future do not have to resize the disks manually, having to stop production systems to make that change.
Dynamic disk size in KVM
- Thread starter Tacioandrade
- Start date
Hi,
and how this should be work?
the resizing have to parts
Part 1 resize the container. Ok this is no problem and can be done by the host.
Part 2 resize the fs what is owned be the vm and the host can have no access to this if the vm is running.
the only possibility would be to have a client installed on each Vm what do the job.
and how this should be work?
the resizing have to parts
Part 1 resize the container. Ok this is no problem and can be done by the host.
Part 2 resize the fs what is owned be the vm and the host can have no access to this if the vm is running.
the only possibility would be to have a client installed on each Vm what do the job.
Theoretically there could be a VM/client daemon that calls PVE API to request disk resize and then later reacts to handle the internal fs resize too.
Tricky, hacky and disaster waiting to happen - but doable. I personally do not feel that this kind of daemon should be offered by PVE itself.
Tricky, hacky and disaster waiting to happen - but doable. I personally do not feel that this kind of daemon should be offered by PVE itself.
Resizing disks is also very important in a customer for example had created a 120GB disk and needed to increase the same to 250GB due to the expansion of the logs of an application, in VMWare the problem would be easily solved in Proxmox had to clone the HD with Clonezilla.
However what I wanted with the topic was asking for dynamic sized disks, as in Virtualbox which create a 500GB disk, however it will only use the storage space occupied by the files within the qcow2 or RAW, for example a vitual disk 500GB would only occupy 4 GB after installing Debian 8 with PostgreSQL and other software, thus spare room for other VMs to disk.
However what I wanted with the topic was asking for dynamic sized disks, as in Virtualbox which create a 500GB disk, however it will only use the storage space occupied by the files within the qcow2 or RAW, for example a vitual disk 500GB would only occupy 4 GB after installing Debian 8 with PostgreSQL and other software, thus spare room for other VMs to disk.
all what you describe here is working since a long time with Proxmox VE, all on the GUI.
so what do you miss?
@Tacio: I've recently updated https://pve.proxmox.com/wiki/Resize_disks
Here you have step by steps instructions on how to do online resizing of a disk of a Linux Guest.
Here you have step by steps instructions on how to do online resizing of a disk of a Linux Guest.
