Both kubedns and dnsmasq modes are long not maintained. We should run dns_late steps at the end because sshd makes DNS lookups during Ansible run and has 2s timeouts for each failed lookup trying to connect to coredns before it is ready.
* Fix bootstrap_os/ubuntu idempotency * Update bastion role * move container_engine in sub-roles * requires ansible 2.5 * ubuntu18 as first CI job
