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diff --git a/roles/openshift_sanitize_inventory/tasks/main.yml b/roles/openshift_sanitize_inventory/tasks/main.yml
new file mode 100644
index 000000000..e327ee9f5
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+++ b/roles/openshift_sanitize_inventory/tasks/main.yml
@@ -0,0 +1,56 @@
+---
+# We should print out deprecations prior to any failures so that if a play does fail for other reasons
+# the user would also be aware of any deprecated variables they should note to adjust
+- include: deprecations.yml
+
+- name: Abort when conflicting deployment type variables are set
+  when:
+    - deployment_type is defined
+    - openshift_deployment_type is defined
+    - openshift_deployment_type != deployment_type
+  fail:
+    msg: |-
+      openshift_deployment_type is set to "{{ openshift_deployment_type }}".
+      deployment_type is set to "{{ deployment_type }}".
+      To avoid unexpected results, this conflict is not allowed.
+      deployment_type is deprecated in favor of openshift_deployment_type.
+      Please specify only openshift_deployment_type, or make both the same.
+
+- name: Standardize on latest variable names
+  set_fact:
+    # goal is to deprecate deployment_type in favor of openshift_deployment_type.
+    # both will be accepted for now, but code should refer to the new name.
+    # TODO: once this is well-documented, add deprecation notice if using old name.
+    deployment_type: "{{ openshift_deployment_type | default(deployment_type) | default | string }}"
+    openshift_deployment_type: "{{ openshift_deployment_type | default(deployment_type) | default | string }}"
+
+- name: Abort when deployment type is invalid
+  # this variable is required; complain early and clearly if it is invalid.
+  when: openshift_deployment_type not in known_openshift_deployment_types
+  fail:
+    msg: |-
+      Please set openshift_deployment_type to one of:
+      {{ known_openshift_deployment_types | join(', ') }}
+
+- name: Normalize openshift_release
+  set_fact:
+    # Normalize release if provided, e.g. "v3.5" => "3.5"
+    # Currently this is not required to be defined for all installs, and the
+    # `openshift_version` role can generally figure out the specific version
+    # that gets installed (e.g. 3.5.0.1). So consider this the user's expressed
+    # intent (if any), not the authoritative version that will be installed.
+    openshift_release: "{{ openshift_release | string | regex_replace('^v', '') }}"
+  when: openshift_release is defined
+
+- name: Abort when openshift_release is invalid
+  when:
+    - openshift_release is defined
+    - not openshift_release | match('\d+(\.\d+){1,3}$')
+  fail:
+    msg: |-
+      openshift_release is "{{ openshift_release }}" which is not a valid version string.
+      Please set it to a version string like "3.4".
+
+- include: unsupported.yml
+  when:
+    - not openshift_enable_unsupported_configurations | default(false) | bool