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Troubleshooting local libvirt envs

NOTE there is _deploy.log and _deploy_nice.log produced for inspection if the deployment results. It is also persisted by the given OOOQ_PATH.

If the undercloud VM refuses to start (permission deinied) on Ubuntu, try to disable apparmor for libvirt and reconfigure qemu as well:

# echo "dynamic_ownership = 0" >> /etc/libvirt/qemu.conf
# echo 'group = "root"' >> /etc/libvirt/qemu.conf
# echo 'user = "root"' >> /etc/libvirt/qemu.conf
# echo 'security_driver = "none"' >> /etc/libvirt/qemu.conf
# sudo systemctl restart libvirt-bin || sudo systemctl restart libvirtd
# sudo systemctl restart qemu-kvm

If libguestfs-test-tool fails, try to adjust SUPERMIN_KERNEL, SUPERMIN_KERNEL_VERSION, SUPERMIN_MODULES and LIBGUESTFS_BACKEND. Or only unset LIBGUESTFS_BACKEND_SETTINGS, then quickstart picks up safe (and very slow) defaults.

More sysctl adjustments may be required to fix inter-VMs connectivity:

# sysctl net.bridge.bridge-nf-call-ip6tables=0
# sysctl net.bridge.bridge-nf-call-iptables=0
# sysctl net.bridge.bridge-nf-call-arptables=0
# sysctl net.ipv4.ip_forward=1

And some more optional magic for PXE boot issue on libvirt

# sysctl net.ipv4.conf.default.proxy_arp=1
# sysctl net.ipv4.conf.brovc.proxy_arp=1
# brctl stp brovc off #default on
# brctl setfd brovc 0.1 #default 15
# iptables -I FORWARD -m physdev --physdev-is-bridged -j ACCEPT