# Local image testing with QEMU / libvirt

To create local testing clusters using QEMU, some prerequisites have to be met:

- [qcow2 constellation image](/image/README.md)
- [libvirt setup](#setup-libvirt)
- [qemu-metadata-api container image](/hack/qemu-metadata-api/README.md)

## Setup libvirt

<details>
<summary>Ubuntu</summary>

### Install required packages

[General reference](https://ubuntu.com/server/docs/virtualization-libvirt)

```shell-session
sudo apt install qemu-kvm libvirt-daemon-system xsltproc
sudo systemctl enable libvirtd
sudo usermod -a -G libvirt $USER
# reboot
```

### Setup emulated TPM

Using a virtual TPM (vTPM) with QEMU only works if swtpm is version 0.7 or newer!
Ubuntu 22.04 currently ships swtpm 0.6.3, so you need to install swtpm [from launchpad](https://launchpad.net/~stefanberger/+archive/ubuntu/swtpm-jammy/).

1. Uninstall current version of swtpm (if installed)

    ```shell-session
    sudo apt remove swtpm swtpm-tools
    ```

2. Add ppa (this command shows the ppa for Ubuntu 22.04 jammy but others are available)

    ```shell-session
    sudo add-apt-repository ppa:stefanberger/swtpm-jammy
    sudo apt update
    ```

3. Install swtpm

    ```shell-session
    sudo apt install swtpm swtpm-tools
    ```

4. Patch configuration under `/etc/swtpm_setup.conf`

    ```shell-session
    # Program invoked for creating certificates
    create_certs_tool = /usr/bin/swtpm_localca
    ```

5. Patch ownership of `/var/lib/swtpm-localca`

   ```shell-session
   sudo chown -R swtpm:root /var/lib/swtpm-localca
   ```

</details>

<details>
<summary>Fedora</summary>

```shell-session
sudo dnf install -y dnf-plugins-core
sudo dnf -y install qemu-kvm libvirt-daemon-config-network libvirt-daemon-kvm xsltproc swtpm
sudo usermod -a -G libvirt $USER
# reboot
```

</details>

## Update libvirt settings

Open `/etc/libvirt/qemu.conf` and change the following settings:

```shell-session
security_driver = "none"
```

Then restart libvirt

```shell-session
sudo systemctl restart libvirtd
```

## Misc

- List all domains: `virsh list --all`
- Destroy domain with nvram: `virsh undefine --nvram <name>`