Persist DNS configuration for nodes for openstack provider

* Firstly, provision a Heat stack with given public resolvers.
* After the DNS node configured as an authoritative server,
  switch the Heat stack's Neutron subnet to that resolver
  (private_dns_server) the way it to become the first entry pushed
  into the  hosts /etc/resolv.conf. It will be serving the cluster
  domain requests for OpenShift nodes and workloads.
* Drop post-provision /etc/reslov.conf nameserver hacks as not
  needed anymore.
* Fix dns floating IPs output and add the priv IPs output as well.
* Update docs, clarify localhost vs servers requirements, add
  required Network Manager setup step.
* Use post-provision task names instead of comments.

Signed-off-by: Bogdan Dobrelya <bdobreli@redhat.com>

1 files changed, 9 insertions, 14 deletions

diff --git a/roles/openstack-stack/templates/heat_stack.yaml.j2 b/roles/openstack-stack/templates/heat_stack.yaml.j2
index 00a46896c..8bf76b57c 100644
--- a/roles/openstack-stack/templates/heat_stack.yaml.j2
+++ b/roles/openstack-stack/templates/heat_stack.yaml.j2
@@ -61,18 +61,13 @@ outputs:
         - dns
         - name
 
-  dns_floating_ip:
-    description: Floating IP of the DNS
-    value:
-      get_attr:
-        - dns
-        - addresses
-        - str_replace:
-            template: openshift-ansible-cluster_id-net
-            params:
-              cluster_id: {{ stack_name }}
-        - 1
-        - addr
+  dns_floating_ips:
+    description: Floating IPs of the DNS
+    value: { get_attr: [ dns, floating_ip ] }
+
+  dns_private_ips:
+    description: Private IPs of the DNS
+    value: { get_attr: [ dns, private_ip ] }
 
 resources:
 
@@ -111,9 +106,9 @@ resources:
               params:
                 subnet_24_prefix: {{ subnet_prefix }}
       dns_nameservers:
-      {% for nameserver in dns_nameservers %}
+{% for nameserver in dns_nameservers %}
         - {{ nameserver }}
-      {% endfor %}
+{% endfor %}
 
   router:
     type: OS::Neutron::Router