pre-upgrade health checks (#98)

Fixes: #97
Signed-off-by: Prajyot Parab <[email protected]>

playbooks/roles/ocp-upgrade/tasks/main.yaml

@@ -1,5 +1,23 @@
 ---
 
+- name: Fetch cluster operators details
+  shell: "oc get co"
+  register: oplog
+  until: "'AVAILABLE' in oplog.stdout"
+  retries: 3
+  delay: 3
+
+- name: Process cluster operators details
+  shell: |
+    echo "{{ oplog.stdout }}" | awk '/PROGRESSING/,EOF {print $4}' | grep 'True' | wc -l
+    echo "{{ oplog.stdout }}" | awk '/DEGRADED/,EOF {print $5}' | grep 'True' | wc -l
+  register: opcount
+
+- name: Fail upgrade process incase cluster state is unhealthy
+  fail:
+    msg: The current cluster state is unhealthy, upgrading it is not recommended. Please run 'oc get co' command for more details or try upgrade after sometime.
+  when: opcount.stdout_lines[0]|int > 0 or opcount.stdout_lines[1]|int > 0
+
 - name: Upgrade ocp to a stable version
   block:
      - name: Set upgrade channel