##### 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

"""Get any additional options needed when delegating tests to a docker container.
        :rtype: list[str]
        """
        if self.managed and self.vmware_test_platform != 'worldstream':
            return ['--link', self.DOCKER_SIMULATOR_NAME]
        return []
    def cleanup(self):
        """Clean up the cloud resource and any temporary configuration files after tests complete."""
        if self.vmware_test_platform == 'worldstream':
            if self.aci:
                self.aci.stop()
        if self.container_name:
            docker_rm(self.args, self.container_name)
        super(VcenterProvider, self).cleanup()
    def _setup_dynamic_simulator(self):
        """Create a vcenter simulator using docker."""
        container_id = get_docker_container_id()
        if container_id:
            display.info('Running in docker container: %s' % container_id, verbosity=1)
        self.container_name = self.DOCKER_SIMULATOR_NAME
        results = docker_inspect(self.args, self.container_name)
        if results and not results[0].get('State', {}).get('Running'):
            docker_rm(self.args, self.container_name)
            results = []
        if results: