Comment 8 for bug 1878639

With the vsphere config machine-4:

May 14 16:43:18 juju-60990d-4 cloud-init[1562]: + /bin/systemctl enable /etc/systemd/system/juju-clean-shutdown.service
May 14 16:43:18 juju-60990d-4 cloud-init[1562]: Failed to enable unit: Connection timed out

The systectl command failed, causing cloud-init to fail and exit before jujud-machine-4.service cloud be enabled on that machine.