Replace multi-role checks with action plugin

This approach should make it easier to add new checks without having to
write lots of YAML and doing things against Ansible (e.g.
ignore_errors).

A single action plugin determines what checks to run per each host,
including arguments to the check. A check is implemented as a class with
a run method, with the same signature as an action plugin and module,
and is normally backed by a regular Ansible module.

Each check is implemented as a separate Python file. This allows whoever
adds a new check to focus solely in a single Python module, and
potentially an Ansible module within library/ too.

All checks are automatically loaded, and only active checks that are
requested by the playbook get executed.

1 files changed, 43 insertions, 0 deletions

diff --git a/roles/openshift_health_checker/README.md b/roles/openshift_health_checker/README.md
new file mode 100644
index 000000000..745e45b50
--- /dev/null
+++ b/roles/openshift_health_checker/README.md
@@ -0,0 +1,43 @@
+OpenShift Health Checker
+========================
+
+This role detects common problems with OpenShift installations or with
+environments prior to install.
+
+Requirements
+------------
+
+* Ansible 2.2+
+
+Role Variables
+--------------
+
+None
+
+Dependencies
+------------
+
+- openshift_facts
+
+Example Playbook
+----------------
+
+```yaml
+---
+- hosts: OSEv3
+  name: run OpenShift health checks
+  roles:
+    - openshift_health_checker
+  post_tasks:
+    - action: openshift_health_check
+```
+
+License
+-------
+
+Apache License Version 2.0
+
+Author Information
+------------------
+
+Customer Success team (dev@lists.openshift.redhat.com)