##### 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

task = None
        
        network_changes = False
        for nw in self.params['networks']:
            for key in nw:
                
                if key not in ('device_type', 'mac', 'name', 'vlan', 'type', 'start_connected'):
                    network_changes = True
                    break
        if len(self.params['customization']) > 1 or network_changes or self.params.get('customization_spec'):
            self.customize_vm(vm_obj=self.current_vm_obj)
        try:
            task = self.current_vm_obj.CustomizeVM_Task(self.customspec)
        except vim.fault.CustomizationFault as e:
            self.module.fail_json(msg="Failed to customization virtual machine due to CustomizationFault: %s" % to_native(e.msg))
        except vim.fault.RuntimeFault as e:
            self.module.fail_json(msg="failed to customization virtual machine due to RuntimeFault: %s" % to_native(e.msg))
        except Exception as e:
            self.module.fail_json(msg="failed to customization virtual machine due to fault: %s" % to_native(e.msg))
        self.wait_for_task(task)
        if task.info.state == 'error':
            return {'changed': self.change_applied, 'failed': True, 'msg': task.info.error.msg, 'op': 'customize_exist'}
        if self.params['wait_for_customization']:
            set_vm_power_state(self.content, self.current_vm_obj, 'poweredon', force=False)
            is_customization_ok = self.wait_for_customization(self.current_vm_obj)
            if not is_customization_ok:
                return {'changed': self.change_applied, 'failed': True, 'op': 'wait_for_customize_exist'}
        return {'changed': self.change_applied, 'failed': False}
    def wait_for_task(self, task, poll_interval=1):