reclass: Multiarch support for arch specific param

Introduce a simple mechanism that simulates an 'if-arch-then' cond
for reclass models:
- add new <all-mcp-ocata-common> class hierarchy;
- at runtime (via <salt.sh>) make 'all-mcp-ocata-common.arch' point
  to 'all-mcp-ocata-common.$(uname -i)' dynamically;
- inherit new 'arch' class in all cluster models;
- factor out current x86_64 default for "salt_control_xenial_image";
- add AArch64 default for param "salt_control_xenial_image";

Change-Id: I3b239b28d0fd1cc2ced8579e2e93b764eb71ffc3
Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>

1 files changed, 23 insertions, 0 deletions

diff --git a/mcp/reclass/classes/cluster/README.rst b/mcp/reclass/classes/cluster/README.rst
new file mode 100644
index 000000000..3fec9b0f2
--- /dev/null
+++ b/mcp/reclass/classes/cluster/README.rst
@@ -0,0 +1,23 @@
+.. This work is licensed under a Creative Commons Attribution 4.0 International License.
+.. http://creativecommons.org/licenses/by/4.0
+.. (c) 2017 Mirantis Inc., Enea AB and others.
+
+Fuel@OPNFV Cluster Reclass Models
+=================================
+
+Overview
+--------
+
+#. Common classes (baremetal + virtual)
+
+   - all-mcp-ocata-common
+
+#. Common classes (specific to either baremetal or virtual deploys)
+
+   - baremetal-mcp-ocata-common
+   - virtual-mcp-ocata-common
+
+#. Cluster specific classes
+
+   - baremetal-mcp-ocata-*
+   - virtual-mcp-ocata-*