Exception when matching on a node's group

[jcstanaway]

Using image 3.1.0.

Created scenario:

apiVersion: powerfulseal.io/v1
kind: Scenario
metadata:
  name: default-node-death
  namespace: kube-system
spec:
  name: default-node-death
  description: "default nodegroup: kill a single node"
  steps:
    - nodeAction:
        matches:
          - property:
              name: group
              value: default
          - property:
              name: group
              negative: true
              value: master
          - property:
              name: group
              negative: true
              value: etcd
        filters:
          - probability: 0.1
          - randomSample:
              ratio: 0.34
          - randomSample:
              size: 1
        actions:
          - stop:
              autoRestart: false

Loaded the scenario and when seal attempted to execute the scenario, it threw an uncaught exception and exited:

2021-03-30 00:02:10 INFO scenario.default-node-de Starting scenario 'default-node-death' (1 steps)
Traceback (most recent call last):
  File "/usr/local/bin/powerfulseal", line 8, in <module>
    sys.exit(start())
  File "/usr/local/lib/python3.7/site-packages/powerfulseal/cli/__main__.py", line 656, in start
    main(sys.argv[1:])
  File "/usr/local/lib/python3.7/site-packages/powerfulseal/cli/__main__.py", line 630, in main
    metric_collector=metric_collector
  File "/usr/local/lib/python3.7/site-packages/powerfulseal/policy/policy_runner.py", line 112, in run
    ret = scenario.execute()
  File "/usr/local/lib/python3.7/site-packages/powerfulseal/policy/scenario.py", line 60, in execute
    ret = action_method(schema=step.get(action_name))
  File "/usr/local/lib/python3.7/site-packages/powerfulseal/policy/scenario.py", line 95, in action_nodes
    return self.execute_action(action)
  File "/usr/local/lib/python3.7/site-packages/powerfulseal/policy/scenario.py", line 82, in execute_action
    ret_val = action.execute()
  File "/usr/local/lib/python3.7/site-packages/powerfulseal/policy/action_nodes_pods.py", line 51, in execute
    initial_set = self.match()
  File "/usr/local/lib/python3.7/site-packages/powerfulseal/policy/action_nodes.py", line 48, in match
    if self.match_property(node, match):
  File "/usr/local/lib/python3.7/site-packages/powerfulseal/policy/action_nodes_pods.py", line 80, in match_property
    value = getattr(candidate, name)
AttributeError: 'Node' object has no attribute 'group'

I suspect it's an issue of "group" vs. "groups". When in interactive mode:

(seal) $ nodes
[node no=166 id=REDACTED ip=REDACTED extIp=REDACTED az=nope groups=['2', 'Standard_D4s_v3', 'amd64', 'default', 'REDACTED', 'e9ae415dc7b6ac569ada5eef11dde1dbb162a674868aef209c826bea00c820', 'eastus', 'eastus-3', 'linux', 'node'] name=REDACTED state=UNKNOWN]
[...]

[emyes]

Hello everyone,

Can we get some assistance on this issue. We are also facing similar issue while running powerful incluster deployment on kubeseal.