##### SUMMARY

The following snippet from https://github.com/ansible/ansible/blob/devel/test/integration/targets/vmware_guest/tasks/create_d1_c1_f0.yml uses `autoselect_datastore: True`.

```yaml
- name: create new VMs
  vmware_guest:
    validate_certs: False
    hostname: "{{ vcenter_hostname }}"
    username: "{{ vcenter_username }}"
    password: "{{ vcenter_password }}"
    name: newvm_1
    #template: "{{ item|basename }}"
    guest_id: centos64Guest
    datacenter: "{{ dc1 }}"
    hardware:
        num_cpus: 1
        num_cpu_cores_per_socket: 1
        memory_mb: 256
        hotadd_memory: true
        hotadd_cpu: false
        max_connections: 10
    disk:
        - size: 1gb
          type: thin
          autoselect_datastore: True
    state: poweredoff
    folder: F0
```

One of my two datastores is dedicated to the ISO image and so, is readOnly. But it still get selected consistently. I use the following hack to avoid the problem:

```diff
diff --git a/lib/ansible/modules/cloud/vmware/vmware_guest.py b/lib/ansible/modules/cloud/vmware/vmware_guest.py
index 6a63e97798..3648e3e87f 100644
--- a/lib/ansible/modules/cloud/vmware/vmware_guest.py
+++ b/lib/ansible/modules/cloud/vmware/vmware_guest.py
@@ -1925,6 +1925,15 @@ class PyVmomiHelper(PyVmomi):
 
                 datastore_freespace = 0
                 for ds in datastores:
+                    is_readonly = False
+                    for h in ds.host:
+                        if h.mountInfo.accessMode == 'readOnly':
+                            is_readonly = True
+                            break
+
+                    if is_readonly:
+                        continue
+
                     if (ds.summary.freeSpace > datastore_freespace) or (ds.summary.freeSpace == datastore_freespace and not datastore):
                         # If datastore field is provided, filter destination datastores
                         if 'datastore' in self.params['disk'][0] and \
```
<!--- Explain the problem briefly below -->

##### ISSUE TYPE
- Bug Report

##### COMPONENT NAME
<!--- Write the short name of the module, plugin, task or feature below, use your best guess if unsure -->

vmware_guest

except ValueError:
                    self.module.fail_json(msg="hardware.mem_reservation or hardware.memory_reservation should be an integer value.")
                memory_allocation.reservation = mem_reservation
                if vm_obj is None or \
                        memory_allocation.reservation != vm_obj.config.memoryAllocation.reservation:
                    rai_change_detected = True
            if 'cpu_limit' in self.params['hardware']:
                cpu_limit = None
                try:
                    cpu_limit = int(self.params['hardware'].get('cpu_limit'))
                except ValueError:
                    self.module.fail_json(msg="hardware.cpu_limit attribute should be an integer value.")
                cpu_allocation.limit = cpu_limit
                if vm_obj is None or cpu_allocation.limit != vm_obj.config.cpuAllocation.limit:
                    rai_change_detected = True
            if 'cpu_reservation' in self.params['hardware']:
                cpu_reservation = None
                try:
                    cpu_reservation = int(self.params['hardware'].get('cpu_reservation'))
                except ValueError:
                    self.module.fail_json(msg="hardware.cpu_reservation should be an integer value.")
                cpu_allocation.reservation = cpu_reservation
                if vm_obj is None or \
                        cpu_allocation.reservation != vm_obj.config.cpuAllocation.reservation:
                    rai_change_detected = True
        if rai_change_detected:
            self.configspec.memoryAllocation = memory_allocation
            self.configspec.cpuAllocation = cpu_allocation
            self.change_detected = True
    def configure_cpu_and_memory(self, vm_obj, vm_creation=False):