CORD-1151
Make cord_dir and cord_profile_dir local to config node
use head_* and config_* prefixes to avoid hardcoding paths
config-side ssh key generation+
fix frontend & mock builds
[build] group in inventory
fix inventory strangeness
raise privs when creating ssh_pki_dir
move admin-openrc.sh.j2 to cord-profile
add copy-cord-playbook.yml, clarify where it runs
fix paths for head_cord_profile_dir with mock/frontend
use /opt/cord_profile/admin-openrc.sh rather than ~/admin-openrc.sh
install pki
make comment in do-enlist-compute-node accurate, set correct interface
remove hardcoded credential path
logging and ssh key fixes

Change-Id: Ie7560c911dce1558e09806c9997884dfbd475e9c
diff --git a/roles/compute-node-config/defaults/main.yml b/roles/compute-node-config/defaults/main.yml
index 70507cc..dffca62 100644
--- a/roles/compute-node-config/defaults/main.yml
+++ b/roles/compute-node-config/defaults/main.yml
@@ -1,10 +1,14 @@
 ---
 # compute-node-config/defaults/main.yml
 
-cord_profile_dir: "{{ ansible_user_dir + '/cord_profile' }}"
+# location of cord_profile on head node
+head_cord_profile_dir: /opt/cord_profile
+
+# name of the external interface on compute nodes. Should have the ansible_ prefix.
+# `fabric` is default in R-CORD
+compute_external_interface: ansible_fabric
 
 # service configs referenced here are likely located in cord-profile/templates
-
 # used in openstack-compute-vtn.yaml.j2, referencing network in management-net.yaml.j2
 use_management_hosts: False
 vtn_management_host_net_interface: veth3
@@ -12,3 +16,4 @@
 # used in openstack-compute-vtn.yaml.j2, referencing service in fabric.yaml.j2
 use_fabric: False
 
+