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QEMU Support

The Packer and Terraform support QEMU. To enable this libvirt and virt-mananer are needed. Below will show to set them up

Linux - Yum package manager

  • Using Linux OSes with the yum package manager you will only be able to build x86 images.
sudo dnf install @virt virt-top libguestfs-tools virt-install
sudo systemctl enable --now libvirtd
sudo dnf install virt-manager

# Add this line to your .bashrc or .zshrc
export PKR_VAR_qemu_kvm="true" # this ensures the packer uses the qemu-kvm exectuable

Linux - Apt package manager

  • Using Linux OSes with the apt package manager you will be able to make both x86 and aarch64 images. However, the version of the binaries provided through apt for QEMU are too outdated and don't work well. So due to this we need to manually build and install a new version of QEMU. To do this follow section QEMU 0.8.3.

QEMU 0.8.3

QEMU 0.8.3 is a known good version to work with the Packer code so it will be the version instructed to download. Currently we focus on installing inside of a machine with the apt package manager, but something similar may be able to be done with yum. However, yum's default version allows for x86 to be built perfectly fine. So, the only reason for doing this on a yum machine would be so that the aarch versions can be built.

Prereqs

sudo wget -qO /usr/local/bin/ninja.gz https://github.com/ninja-build/ninja/releases/latest/download/ninja-linux.zip
sudo gunzip /usr/local/bin/ninja.gz
sudo chmod a+x /usr/local/bin/ninja

sudo apt install \
    qemu-kvm \
    libvirt-daemon-system \
    libvirt-clients \
    bridge-utils \
    pkg-config \
    virt-manager \
    build-essential \
    libcairo2-dev \
    libpango1.0-dev \
    libjpeg-dev \
    libgif-dev \
    librsvg2-dev \
    flex \
    bison \
    slirp \
    libslirp0 \
    libslirp-dev \
    sshpass \
    xsltproc

# To use terraform this need set
sudo sed -ie 's|#security_driver = "selinux"|security_driver = "none"|' /etc/libvirt/qemu.conf
sudo systemctl restart libvirtd

Download & Install QEMU

wget https://download.qemu.org/qemu-8.0.3.tar.xz
tar -xvJf qemu-8.0.3.tar.xz
cd qemu-8.0.3
./configure
sudo make install

sudo vim /etc/apparmor.d/abstractions/libvirt-qemu
# Add below lines after line with "Site-specific additions and overrides",  without the # infront
# /usr/local/bin/* rmix,
# /usr/local/share/qemu/* r,

sudo vim /etc/apparmor.d/usr.sbin.libvirtd
# Add below lines after line with "Site-specific additions and overrides", without the # infront
# /usr/local/bin/* PUx,

sudo systemctl restart apparmor.service