Fix error where pod has error and no containers

(cherry picked from commit 865430e3e0)

changelogs/fragments/49299-openshift-inventory-plugin-empty-pods-and-serialization.yaml

@@ -0,0 +1,4 @@
+---
+bugfixes:
+- Convert hostvars data in OpenShift inventory plugin to be serializable by ansible-inventory
+- Fix error in OpenShift inventory plugin when a pod has errored and is empty

lib/ansible/module_utils/k8s/inventory.py

@@ -127,6 +127,9 @@ class K8sInventoryHelper(K8sAnsibleMixin):
             else:
                 pod_labels = {}
 
+            if not pod.status.containerStatuses:
+                continue
+
             for container in pod.status.containerStatuses:
                 # add each pod_container to the namespace group, and to each label_value group
                 container_name = '{0}_{1}'.format(pod.metadata.name, container.name)