##### 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

network_devices = list()
        
        for network in self.params['networks']:
            if 'name' not in network and 'vlan' not in network:
                self.module.fail_json(msg="Please specify at least a network name or"
                                          " a VLAN name under VM network list.")
            if 'name' in network and self.cache.get_network(network['name']) is None:
                self.module.fail_json(msg="Network '%(name)s' does not exist." % network)
            elif 'vlan' in network:
                dvps = self.cache.get_all_objs(self.content, [vim.dvs.DistributedVirtualPortgroup])
                for dvp in dvps:
                    if hasattr(dvp.config.defaultPortConfig, 'vlan') and \
                            isinstance(dvp.config.defaultPortConfig.vlan.vlanId, int) and \
                            str(dvp.config.defaultPortConfig.vlan.vlanId) == str(network['vlan']):
                        network['name'] = dvp.config.name
                        break
                    if 'dvswitch_name' in network and \
                            dvp.config.distributedVirtualSwitch.name == network['dvswitch_name'] and \
                            dvp.config.name == network['vlan']:
                        network['name'] = dvp.config.name
                        break
                    if dvp.config.name == network['vlan']:
                        network['name'] = dvp.config.name
                        break
                else:
                    self.module.fail_json(msg="VLAN '%(vlan)s' does not exist." % network)
            if 'type' in network:
                if network['type'] not in ['dhcp', 'static']:
                    self.module.fail_json(msg="Network type '%(type)s' is not a valid parameter."
                                              " Valid parameters are ['dhcp', 'static']." % network)