##### 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 all host system managed object
        Args:
            cluster_name: Name of Cluster
            esxi_host_name: Name of ESXi server
        Returns: A list of all host system managed objects, else empty list
        """
        host_obj_list = []
        if not self.is_vcenter():
            hosts = get_all_objs(self.content, [vim.HostSystem]).keys()
            if hosts:
                host_obj_list.append(list(hosts)[0])
        else:
            if cluster_name:
                cluster_obj = self.find_cluster_by_name(cluster_name=cluster_name)
                if cluster_obj:
                    host_obj_list = [host for host in cluster_obj.host]
                else:
                    self.module.fail_json(changed=False, msg="Cluster '%s' not found" % cluster_name)
            elif esxi_host_name:
                if isinstance(esxi_host_name, str):
                    esxi_host_name = [esxi_host_name]
                for host in esxi_host_name:
                    esxi_host_obj = self.find_hostsystem_by_name(host_name=host)
                    if esxi_host_obj:
                        host_obj_list.append(esxi_host_obj)
                    else:
                        self.module.fail_json(changed=False, msg="ESXi '%s' not found" % host)
        return host_obj_list
    def host_version_at_least(self, version=None, vm_obj=None, host_name=None):