##### 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 = self.current_vm_obj.Rename_Task(self.params['name'])
            self.wait_for_task(task)
            if task.info.state == 'error':
                return {'changed': self.change_applied, 'failed': True, 'msg': task.info.error.msg, 'op': 'rename'}
        
        if self.params['is_template'] and not self.current_vm_obj.config.template:
            try:
                self.current_vm_obj.MarkAsTemplate()
                self.change_applied = True
            except vmodl.fault.NotSupported as e:
                self.module.fail_json(msg="Failed to mark virtual machine [%s] "
                                          "as template: %s" % (self.params['name'], e.msg))
        
        elif not self.params['is_template'] and self.current_vm_obj.config.template:
            resource_pool = self.get_resource_pool()
            kwargs = dict(pool=resource_pool)
            if self.params.get('esxi_hostname', None):
                host_system_obj = self.select_host()
                kwargs.update(host=host_system_obj)
            try:
                self.current_vm_obj.MarkAsVirtualMachine(**kwargs)
                self.change_applied = True
            except vim.fault.InvalidState as invalid_state:
                self.module.fail_json(msg="Virtual machine is not marked"
                                          " as template : %s" % to_native(invalid_state.msg))
            except vim.fault.InvalidDatastore as invalid_ds:
                self.module.fail_json(msg="Converting template to virtual machine"
                                          " operation cannot be performed on the"
                                          " target datastores: %s" % to_native(invalid_ds.msg))
            except vim.fault.CannotAccessVmComponent as cannot_access: