cloudify custom workflow missing cloudify_agent runtime information - workflow

Question

I want to develop my own workflow named "backup" in cloudify with my own plugin, but when i ran that workflow, the below error occured
'backup' workflow execution failed: RuntimeError: Workflow failed: Task failed 'script_runner.tasks.run' -> Missing cloudify_agent runtime information. This most likely means that the Compute node never started successfully
I don't understand why, anybody can solved me this problem?
Here is my main blueprint code and plugin code
My main blueprint
tosca_definitions_version: cloudify_dsl_1_2
imports:
- plugins/backup.yaml
- types/types.yaml
node_templates:
mynode:
type: cloudify.nodes.Compute
properties:
ip: "ip"
agent_config:
install_method: none
user: "user"
key: "key_uri"
myapp:
type: cloudify.nodes.ApplicationModule
interfaces:
test_platform_backup:
backup:
implementation: scripts/backup.sh
inputs:
port: 6969
post_backup:
implementation: scripts/post_backup.sh
relationships:
- type: cloudify.relationships.contained_in
target: mynode
My plugin code:
from cloudify.decorators import workflow
from cloudify.workflows import ctx
from cloudify.workflows.tasks_graph import forkjoin
#workflow
def backup(operation, type_name, operation_kwargs, is_node_operation, **kwargs):
graph = ctx.graph_mode()
send_event_starting_tasks = {}
send_event_done_tasks = {}
for node in ctx.nodes:
if type_name in node.type_hierarchy:
for instance in node.instances:
send_event_starting_tasks[instance.id] = instance.send_event('Starting to run operation')
send_event_done_tasks[instance.id] = instance.send_event('Done running operation')
for node in ctx.nodes:
if type_name in node.type_hierarchy:
for instance in node.instances:
sequence = graph.sequence()
if is_node_operation:
operation_task = instance.execute_operation(operation, kwargs=operation_kwargs)
else:
forkjoin_tasks = []
for relationship in instance.relationships:
forkjoin_tasks.append(relationship.execute_source_operation(operation))
forkjoin_tasks.append(relationship.execute_target_operation(operation))
operation_task = forkjoin(*forkjoin_tasks)
sequence.add(
send_event_starting_tasks[instance.id],
operation_task,
send_event_done_tasks[instance.id])
for node in ctx.nodes:
for instance in node.instances:
for rel in instance.relationships:
instance_starting_task = send_event_starting_tasks.get(instance.id)
target_done_task = send_event_done_tasks.get(rel.target_id)
if instance_starting_task and target_done_task:
graph.add_dependency(instance_starting_task, target_done_task)
return graph.execute()

Answer 1

It seems that your VM did not start.
From your code I can't understand what you are trying to do.
You don't install and agent and you don't have a fabric connection to the VM, yet you are trying to run operations on the VM.
You should either install an agent, E.g remove the "install_method: none", or add a fabric connection to the VM and run the operations with it.