Add allowUnsafeConfig database setting

We overrode the PXC resource values in order for functional tests
in minikube to work.  Restore the defaults and set an override in
the functional tests.

Change-Id: Id0560d9089f03ddcb116dccec0b424b811186d65

doc/source/index.rst

@@ -320,6 +320,15 @@ verbatim):
 
             The key name in the secret should be ``dburi``.
 
+         .. attr:: allowUnsafeConfig
+            :default: False
+
+            If you are running in a resource constrained environment
+            (such as minikube), the requested resource values for the
+            Percona XtraDB may be too large.  Set this to True to
+            override the default values and construct the cluster
+            regardless.  Only use this for testing.
+
       .. attr:: zookeeper
 
          This is not required unless you want to manage the ZooKeeper

playbooks/zuul-operator-functional/run.yaml

@@ -16,6 +16,8 @@
       include_tasks: tasks/apply_cr.yaml
       vars:
         spec:
+          database:
+            allowUnsafeConfig: true
           executor:
             count: 1
             sshkey:

playbooks/zuul-operator-functional/test.yaml

@@ -75,6 +75,8 @@
         - include_tasks: tasks/apply_cr.yaml
           vars:
             spec:
+              database:
+                allowUnsafeConfig: true
               executor:
                 count: 1
                 sshkey:

zuul_operator/zuul.py

@@ -124,8 +124,8 @@ class Zuul:
         if not self.manage_db:
             self.log.info("DB is externally managed")
             return
-        # TODO: get this from spec
-        small = True
+
+        small = self.spec.get('database', {}).get('allowUnsafeConfig', False)
 
         self.log.info("DB is internally managed")
         self.pxc = pxc.PXC(self.api, self.namespace, self.log)