diff --git a/README.rst b/README.rst
index fa5f93cda..cdc20779a 100644
--- a/README.rst
+++ b/README.rst
@@ -38,6 +38,7 @@ Validations that are run on a fresh machine *before* the undercloud is
 installed.
 
 - `undercloud-ram.yaml`: Verify the undercloud fits the RAM requirements
+- `undercloud-cpu.yaml`: Verify undercloud fits the CPU core requirements
 
 Pre Introspection
 ~~~~~~~~~~~~~~~~~
@@ -46,6 +47,7 @@ Validations that are run when the undercloud is ready to perform hardware
 introspection.
 
 - `undercloud-ram.yaml`: Verify the undercloud fits the RAM requirements
+- `undercloud-cpu.yaml`: Verify undercloud fits the CPU core requirements
 
 Pre Deployment
 ~~~~~~~~~~~~~~
diff --git a/validations/undercloud-cpu.yaml b/validations/undercloud-cpu.yaml
new file mode 100644
index 000000000..cda16cefd
--- /dev/null
+++ b/validations/undercloud-cpu.yaml
@@ -0,0 +1,17 @@
+---
+- hosts: undercloud
+  vars:
+    metadata:
+      name: Verify undercloud fits the CPU core requirements
+      description: >
+        Make sure that the undercloud has enough CPU cores.
+
+        https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux_OpenStack_Platform/7/html/Director_Installation_and_Usage/sect-Undercloud_Requirements.html
+      groups:
+        - prep
+        - pre-introspection
+    min_undercloud_cpu_count: 8
+  tasks:
+  - name: Verify the number of CPU cores
+    fail: msg="There are {{ ansible_processor_vcpus }} cores in the system, but there should be at least {{ min_undercloud_cpu_count }}"
+    failed_when: "{{ ansible_processor_vcpus|int }} < {{ min_undercloud_cpu_count|int }}"