proxmox_kvm: 500 error args parameter (#1783) (#1832)

* don't add args if set to 'no_defaults'

* never add force even if false, will require archive parameter other which is not implemented

* remove trailing whitespace

* add changelog fragment

* Update changelogs/fragments/1783-proxmox-kvm-fix-args-500-error.yaml

Co-authored-by: Felix Fontein <felix@fontein.de>

Co-authored-by: Felix Fontein <felix@fontein.de>
(cherry picked from commit 5aac81bdd1)

Co-authored-by: almdudler777 <43605831+almdudler777@users.noreply.github.com>

changelogs/fragments/1783-proxmox-kvm-fix-args-500-error.yaml

@@ -0,0 +1,3 @@
+bugfixes:
+  - proxmox_kvm - do not add ``args`` if ``proxmox_default_behavior`` is set to no_defaults  (https://github.com/ansible-collections/community.general/issues/1641).
+  - proxmox_kvm - stop implicitly adding ``force`` equal to ``false``. Proxmox API requires not implemented parameters otherwise, and assumes ``force`` to be ``false`` by default anyways (https://github.com/ansible-collections/community.general/pull/1783).

plugins/modules/cloud/misc/proxmox_kvm.py

@@ -31,6 +31,9 @@ options:
     description:
       - Pass arbitrary arguments to kvm.
       - This option is for experts only!
+      - If I(proxmox_default_behavior) is set to C(compatiblity) (the default value), this
+        option has a default of C(-serial unix:/var/run/qemu-server/<vmid>.serial,server,nowait).
+        Note that the default value of I(proxmox_default_behavior) changes in community.general 4.0.0.
     type: str
   autostart:
     description:
@@ -925,9 +928,9 @@ def create_vm(module, proxmox, vmid, newid, node, name, memory, cpu, cores, sock
         if searchdomains:
             kwargs['searchdomain'] = ' '.join(searchdomains)
 
-    # -args and skiplock require root@pam user
+    # -args and skiplock require root@pam user - but can not use api tokens
     if module.params['api_user'] == "root@pam" and module.params['args'] is None:
-        if not update:
+        if not update and module.params['proxmox_default_behavior'] == 'compatibility':
             kwargs['args'] = vm_args
     elif module.params['api_user'] == "root@pam" and module.params['args'] is not None:
         kwargs['args'] = module.params['args']
@@ -1118,7 +1121,6 @@ def main():
             cores=1,
             cpu='kvm64',
             cpuunits=1000,
-            force=False,
             format='qcow2',
             kvm=True,
             memory=512,