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122 lines
3.3 KiB
Markdown
122 lines
3.3 KiB
Markdown
# Auotmated local image testing with QEMU / libvirt / terraform
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## Usage
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Prerequisite:
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- [qcow2 constellation image](/image/README.md)
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- [setup](#setup-libvirt--terraform)
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- [qemu-metadata-api](/hack/qemu-metadata-api/README.md)
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Optional: Write a `terraform.tfvars` file in the terraform workspace (`terraform/libvirt`), defining required variables and overriding optional variables.
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See [variables.tf](./variables.tf) for a description of all available variables.
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```tfvars
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constellation_coreos_image="/path/to/image.qcow2"
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# optional other vars, uncomment and change as needed
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# control_plane_count=3
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# worker_count=2
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# vcpus=2
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# memory=2048
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# state_disk_size=10
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# ip_range_start=100
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# machine="q35"
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```
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Create terraform resources from within terraform workspace (`terraform/libvirt`):
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```shell-session
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cd terraform/libvirt
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terraform init
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terraform plan
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terraform apply
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# set CONST_DIR to your constellation workspace
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export TF_DIR=$(pwd)
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export CONST_DIR=$(pwd)
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go run ../../hack/terraform-to-state/create-state.go "${TF_DIR}" "${CONST_DIR}"
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# use constellation (everything after constellation create)
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constellation config generate qemu
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# run cdbg if using a debug image
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cdbg deploy
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constellation init
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# cleanup
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rm constellation-state.json constellation-mastersecret.base64 constellation-admin.conf wg0.conf
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terraform destroy
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```
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## Setup libvirt & Terraform
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<details>
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<summary>Ubuntu</summary>
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[General reference](https://ubuntu.com/server/docs/virtualization-libvirt)
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```shell-session
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# Install Terraform
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curl -fsSL https://apt.releases.hashicorp.com/gpg | sudo apt-key add -
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sudo apt-add-repository "deb [arch=amd64] https://apt.releases.hashicorp.com $(lsb_release -cs) main"
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sudo apt-get update && sudo apt-get install terraform
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# install libvirt, KVM and tools
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sudo apt install qemu-kvm libvirt-daemon-system xsltproc
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sudo systemctl enable libvirtd
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sudo usermod -a -G libvirt $USER
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# reboot
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```
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</details>
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<details>
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<summary>Fedora</summary>
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```shell-session
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sudo dnf install -y dnf-plugins-core
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sudo dnf config-manager --add-repo https://rpm.releases.hashicorp.com/fedora/hashicorp.repo
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sudo dnf -y install terraform qemu-kvm libvirt-daemon-config-network libvirt-daemon-kvm xsltproc
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sudo usermod -a -G libvirt $USER
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# reboot
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```
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</details>
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## Change libvirt settings (on Ubuntu)
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Open `/etc/libvirt/qemu.conf` and change the following settings:
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```
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security_driver = "none"
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```
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Then restart libvirt
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```shell-session
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sudo systemctl restart libvirtd
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```
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## Setup emulated TPM (on Ubuntu)
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Only works if swtpm is version 0.7 or newer!
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Ubuntu currently ships swtpm 0.6.3 so you need to install swtpm [from launchpad](https://launchpad.net/~stefanberger/+archive/ubuntu/swtpm-jammy/).
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1. Uninstall current version of swtpm (if installed)
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```
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sudo apt remove swtpm swtpm-tools
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```
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2. Add ppa (this command shows the ppa for Ubuntu 22.04 jammy but others are available)
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```
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sudo add-apt-repository ppa:stefanberger/swtpm-jammy
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sudo apt update
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```
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3. Install swtpm
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```
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sudo apt install swtpm swtpm-tools
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```
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4. Patch configuration under `/etc/swtpm_setup.conf`
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```
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# Program invoked for creating certificates
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create_certs_tool = /usr/bin/swtpm_localca
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```
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5. Patch ownership of `/var/lib/swtpm-localca`
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```shell-session
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sudo chown -R swtpm:root /var/lib/swtpm-localca
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```
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## Misc
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- List all domains: `virsh list --all`
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- Destroy domain with nvram: `virsh undefine --nvram <name>`
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