We are starting to move one VMWare environment to use Terraform for VM creation. What is the best practice for OS disks in this environment when guest is Linux?
We have a need to increase disk sizes every now and then, and it must be automated also. We are using Ansible for the actual OS + software configuration part.
Centos uses LVM by default for disk partitioning. I can clone our Linux template just fine to a new VM with Terraform, but the process for increasing disk size is a bit complex. And if we do it the same way as before, we have already two /dev/sdaX partitions for LVM root group when the machine is newly installed, and this doesn’t sound a best practice.
Current LVM disk size increase process
- Make the vmdisk bigger
- Add a new primary partition to /dev/sda
- Add that partition to the LVM + assign to correct volume group etc.
- Increase the size used by the filesystem
So, should we do it like this and then just increase the disk size in Terraform + create an automation to do the rest in Ansible?
In Azure things work much easier regarding this.