disk_availability check: include submount storage

Fixes bug 1491566
https://bugzilla.redhat.com/show_bug.cgi?id=1491566

In order to determine how much storage is under a path, include any
mounts that are below it in addition to the path itself.

1 files changed, 12 insertions, 1 deletions

diff --git a/roles/openshift_health_checker/openshift_checks/disk_availability.py b/roles/openshift_health_checker/openshift_checks/disk_availability.py
index 7956559c6..87e6146d4 100644
--- a/roles/openshift_health_checker/openshift_checks/disk_availability.py
+++ b/roles/openshift_health_checker/openshift_checks/disk_availability.py
@@ -1,6 +1,7 @@
 """Check that there is enough disk space in predefined paths."""
 
 import tempfile
+import os.path
 
 from openshift_checks import OpenShiftCheck, OpenShiftCheckException
 
@@ -121,11 +122,21 @@ class DiskAvailability(OpenShiftCheck):
 
         return {}
 
+    def find_ansible_submounts(self, path):
+        """Return a list of ansible_mounts that are below the given path."""
+        base = os.path.join(path, "")
+        return [
+            mount
+            for mount in self.get_var("ansible_mounts")
+            if mount["mount"].startswith(base)
+        ]
+
     def free_bytes(self, path):
         """Return the size available in path based on ansible_mounts."""
+        submounts = sum(mnt.get('size_available', 0) for mnt in self.find_ansible_submounts(path))
         mount = self.find_ansible_mount(path)
         try:
-            return mount['size_available']
+            return mount['size_available'] + submounts
         except KeyError:
             raise OpenShiftCheckException(
                 'Unable to retrieve disk availability for "{path}".\n'