IMPORTANT: Instructions for installing Terraform with KVM support can be found here.
This cookiecutter enables creation of kvm virtual machines on linux using terraform's libvirt plugin.
Go to the directory you want to keep all terraform provisioning recipes (e.g.
/storage/kvm/terraform), and from there run cookiecutter pointing to this
repository (remotely or locally). E.g. locally: cookiecutter /storage/src/terraform-kvm-cookiecutter
Then, enter the folder with the vm_name you specified and run:
$ make network-create
$ make create
Terraform will then provision the vm on kvm through libvirt.
After finished, run make ssh to ssh into the instance. You can see the other
available commands typing make. To interact with libvirt through virsh
command, check my cheatsheet
here.
IMPORTANT: On my devops repo here at github there is a pure shellscript implementation to another wrapper to kvm. This cookiecutter was based on that.
IMPORTANT: That is now done automatically on the VM creation, but it will be kept here for future reference.
Some images you download will probably not have much space left on disk so that you can install everything you need. Then, you may need to resize their qcow2 disk. Below are the steps to do that:
-
Open virt-manager. Search the vm you want to resize there, and stop it if it is running.
-
Open a terminal to resize the qcow2 disk of the image you want:
$ sudo su
$ cd /storage/kvm/storage_pools/[vm-name]
$ qemu-img resize [vm-name].qcow2 +SIZE
$ # (e.g. 10G for 10 gibibytes).
-
Download gparted live ISO image
-
Open Virt-Manager and stop the VM if it is running. Then, go to the menu at "Edit => Virtual Machine Details". There, click "Show details of virtual hardware". Click the "Add Hardware" button at the lower left corner. Select "Storage", on "Device Type" choose "CDROM Device" and add the gparted ISO file. Click "Finish". Then, go to "Initialization Options", enable the "IDE CDROM" and move it to the top. Then, click "Apply". Then, click the "Play" icon to boot the VM, click the monitor icon (show graphical console), boot from gparted there and use it to resize the partition to its full size. After finished, poweroff from the gparted ISO, go to "Initialization Options" again, move the "IDE CDROM" below the virtual disk and disable it. You're done. Now you must powerup your VM on the CLI through virsh or on Virt Manager. :)
IMPORTANT: the image you use must have cloud-init installed so that it can be provisioned on first boot. If you are not sure, you can download it locally, bind mount and chroot into it. Then, you can check to through the package manager if it is installed. If not, you can install it.
- Terraform provisioning:
/storage/kvm/terraform - Images [^1]:
/storage/kvm/local_images - Virtual Machines:
/storage/kvm/storage_pools - Virtual Machine Backup:
/storage/kvm/backups
[^1] You can use remote ones, but if you prefer not to download each time you can store them locally.