Install and enable QEMU Guest Agent on pfSense on boot

install-qemu-agent.sh

#!/bin/sh

# Install qemu-guest-agent
pkg update
pkg install -y qemu-guest-agent

# Enable it in rc.conf.local
cat > /etc/rc.conf.local << EOF
qemu_guest_agent_enable="YES"
qemu_guest_agent_flags="-d -v -l /var/log/qemu-ga.log"
EOF

# Create a startup script
#
# Adding a delayed startup script in /usr/local/etc/rc.d/ helps circumvent 
# boot services failing to auto-start after pfSense updates
cat > /usr/local/etc/rc.d/qemu-agent.sh << EOF
#!/bin/sh
sleep 5
service qemu-guest-agent start
EOF

# Make it executable
chmod +x /usr/local/etc/rc.d/qemu-agent.sh

# Reboot
reboot