[mistral] lists and dict via CLI or dashboard not possible?

10 Feb 2023


      Hello,

I spent 2 hours of testing the "example" workflow "create_instance" that was created by mistral-db-manage populate.

Mistral 15.0.0 (including commit: 475c5cf34588fb88f2531883c957097ada5a5fb9 Fix sorting error when type is different)

I tested with the CLI (python-mistralclient 4.5.0 as well as 3.7.0) and with the horizon mistral-dashboard (including this fix: 

mistraldashboard/workflows/forms.py

@@ -56,7 +56,7 @@ class ExecuteForm(forms.SelfHandlingForm):

    def handle(self, request, data):
        try:
-            data['workflow_id'] = data.pop('workflow_name')
+           data['wf_identifier'] = data.pop('workflow_name')
            data['workflow_input'] = {}
            for param in self.workflow_parameters:
                value = data.pop(param)


Now it looks like mistral and the mistral-dashboard are working.

But: How to enter a list or a dict to any input field?

The definition of "create_instance" looks like:

---
version: '2.0'

create_instance:
  type: direct

  description: |
    Creates VM and waits till VM OS is up and running.

  input:
    - name
    - image_id
    - flavor_id
    - ssh_username: null
    - ssh_password: null

    # Name of previously created keypair to inject into the instance.
    # Either ssh credentials or keypair must be provided.
    - key_name: null

    # Security_groups: A list of security group names
    - security_groups: null

    # An ordered list of nics to be added to this server, with information about connected networks, fixed IPs, port etc.
    # Example: nics: [{"net-id": "27aa8c1c-d6b8-4474-b7f7-6cdcf63ac856"}]
    - nics: null

  task-defaults:
    on-error:
      - delete_vm

  output:
    ip: <% $.vm_ip %>
    id: <% $.vm_id %>
    name: <% $.name %>
    status: <% $.status %>

  tasks:
    create_vm:
      description: Initial request to create a VM.
      action: nova.servers_create name=<% $.name %> image=<% $.image_id %> flavor=<% $.flavor_id %>
      input:
        key_name: <% $.key_name %>
        security_groups: <% $.security_groups %>
        nics: <% $.nics %>
      publish:
        vm_id: <% task(create_vm).result.id %>
      on-success:
        - search_for_ip
...




But eg, "nics" (mandatory) expects a dict:

https://docs.openstack.org/python-novaclient/rocky/reference/api/novaclient....

nics – An ordered list of nics (dicts) to be added to this server, with information about connected networks, fixed IPs, port etc. Beginning in microversion 2.37 this field is required and also supports a single string value of ‘auto’ or ‘none’. The ‘auto’ value means the Compute service will automatically allocate a network for the project if one is not available. This is the same behavior as not passing anything for nics before microversion 2.37. The ‘none’ value tells the Compute service to not allocate any networking for the server.

and "security_groups" a list:

security_groups – A list of security group names

I tried all possible notations... and gave up after 2 hours.


Is it possible to use that workflow from the CLI and the mistral-dashboard?
How? Could anybody please provide some examples for "nics" and "security_groups"?

All the best,
Florian

    

Engelmann Florian

Engelmann Florian

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