adds ability to have hosts with no floating ips on terraform/openstack (+8 squashed commits)

Squashed commits:
[f9355ea] Swap order in which we reload docker/socket
[2ca6819] Reload docker.socket after installing flannel on coreos

Workaround for #569
[9f976e5] Vagrantfile: setup proxy inside virtual machines

In corporate networks, it is good to pre-configure proxy variables.
[9d7142f] Vagrantfile: use Ubuntu 16.04 LTS

Use recent supported version of Ubuntu for local development setup
with Vagrant.
[50f77cc] Add CI test layouts

* Drop Wily from test matrix
* Replace the Wily cases dropped with extra cases to test separate
  roles deployment

Signed-off-by: Bogdan Dobrelya <bdobrelia@mirantis.com>
[03e162b] Update OWNERS
[c7b00ca] Use tar+register instead of copy/slurp for distributing tokens and certs

Related bug: https://github.com/ansible/ansible/issues/15405

Uses tar and register because synchronize module cannot sudo on the
remote side correctly and copy is too slow.

This patch dramatically cuts down the number of tasks to process
for cert synchronization.
[2778ac6] Add new var skip_dnsmasq_k8s

If skip_dnsmasq is set, it will still not set up dnsmasq
k8s pod. This enables independent setup of resolvconf section
before kubelet is up.

contrib/terraform/openstack/group_vars/all.yml

@@ -1,9 +1,14 @@
+# Valid bootstrap options (required): xenial, coreos, none
+bootstrap_os: "none" 
+
 # Directory where the binaries will be installed
 bin_dir: /usr/local/bin
 
 # Where the binaries will be downloaded.
 # Note: ensure that you've enough disk space (about 1G)
 local_release_dir: "/tmp/releases"
+# Random shifts for retrying failed ops like pushing/downloading
+retry_stagger: 5
 
 # Uncomment this line for CoreOS only.
 # Directory where python binary is installed
@@ -28,6 +33,8 @@ kube_users:
 
 # Kubernetes cluster name, also will be used as DNS domain
 cluster_name: cluster.local
+# Subdomains of DNS domain to be resolved via /etc/resolv.conf
+ndots: 5
 
 # For some environments, each node has a pubilcally accessible
 # address and an address it should bind services to.  These are
@@ -51,6 +58,16 @@ cluster_name: cluster.local
 # but don't know about that address themselves.
 # access_ip: 1.1.1.1
 
+# Etcd access modes:
+# Enable multiaccess to configure clients to access all of the etcd members directly
+# as the "http://hostX:port, http://hostY:port, ..." and ignore the proxy loadbalancers.
+# This may be the case if clients support and loadbalance multiple etcd servers  natively.
+etcd_multiaccess: false
+
+# Assume there are no internal loadbalancers for apiservers exist and listen on
+# kube_apiserver_port (default 443)
+loadbalancer_apiserver_localhost: true
+
 # Choose network plugin (calico, weave or flannel)
 kube_network_plugin: flannel
 
@@ -89,10 +106,12 @@ kube_apiserver_insecure_port: 8080 # (http)
 # You still must manually configure all your containers to use this DNS server,
 # Kubernetes won't do this for you (yet).
 
+# Do not install additional dnsmasq
+skip_dnsmasq: false
 # Upstream dns servers used by dnsmasq
-upstream_dns_servers:
-  - 8.8.8.8
-  - 8.8.4.4
+#upstream_dns_servers:
+#  - 8.8.8.8
+#  - 8.8.4.4
 #
 # # Use dns server : https://github.com/ansibl8s/k8s-skydns/blob/master/skydns-README.md
 dns_setup: true
@@ -109,21 +128,6 @@ dns_server: "{{ kube_service_addresses|ipaddr('net')|ipaddr(2)|ipaddr('address')
 # like you would do when using nova-client before starting the playbook.
 # cloud_provider:
 
-# For multi masters architecture:
-# kube-proxy doesn't support multiple apiservers for the time being so you'll need to configure your own loadbalancer
-# This domain name will be inserted into the /etc/hosts file of all servers
-# configuration example with haproxy :
-# listen kubernetes-apiserver-https
-#   bind 10.99.0.21:8383
-#    option ssl-hello-chk
-#    mode tcp
-#    timeout client 3h
-#    timeout server 3h
-#    server master1 10.99.0.26:443
-#    server master2 10.99.0.27:443
-#    balance roundrobin
-# apiserver_loadbalancer_domain_name: "lb-apiserver.kubernetes.local"
-
 ## Set these proxy values in order to update docker daemon to use proxies
 # http_proxy: ""
 # https_proxy: ""
@@ -134,3 +138,7 @@ dns_server: "{{ kube_service_addresses|ipaddr('net')|ipaddr(2)|ipaddr('address')
 ## An obvious use case is allowing insecure-registry access
 ## to self hosted registries like so:
 docker_options: "--insecure-registry={{ kube_service_addresses }}"
+
+# default packages to install within the cluster
+kpm_packages: []
+#  - name: kube-system/grafana