warewulf-testenv

Terraform template for setting up a virtual warewulf test cluster. It pull an OS appliance and install warewulf on it. You can login to the nodes as root with the password linux.

[!WARNING] This is only for testing purpose as weak passwords are set and ssh keys are handled not securely. Also the warewulf rpm package is installed without gpg check.

Prerequisites

Terraform must be installed, the user must be part of the libvirt group and terraform init has to run.

Usage

Simply run

terraform apply

what will create the instance ww4-host (172.16.?.250) and per default 4 nodes called n[01-04] on the the 172.16.?.0 virtual network, where '?' is a random number, what allows to have several workspaces at the same time. The keys of the file ~/.ssh/authorized_keys are exported to the root account on ww4-host. The root account has the password linux. Also the according warewulf package is installed, but not further configured. The default base OS is a openSUSE Leap 15.5, but following other base OS for ww4-host can be selected by setting the command line variable distribution:

• leap (openSUSE Leap 15.5)
• tw (openSUSE Tumbleweed)
• local-zypp (use local.qcow2 and zypper for installation)

Now you can login to the ww4-host and check if warewulf.conf got the right network configuration. After that configure warewulf with following command

systemctl enable --now warewulfd
wwctl configure -a

and add the nodes with

wwctl node add n[01-04] -I 172.16.?.101

From this point on you should check the warewulf documentation on how to set up the cluster.

After the test you have to remove the virtual machines with

terraform destroy

Configure number of nodes

terraform apply -var="nr_nodes=2"

Don't install warewulf

terraform apply -var="packages=fortune"

known errors

The key in ~/.ssh/authorized_keys are copied over to ww4-host. If there is more than one key, cloud-init fails.