add new field status for policy config crd

[waleedhammam]

Related: #141

What changed?

• add new field status for policy config crd

Why was this change made?

• As a feature request for add new field status for policy config crd to determine if the policies in the config all exist in the cluster or not, that way we can easily display warnings to the user

How was this change implemented?

• By updating the CRD to have a status field to indicate the health of the policy config policies with a list of strings for the policies ids that doesn't exist on the cluster.
• Updating the controller to watch/reconcile this list if any change is done on policy or policy config

How did you validate the change?

• Manual test
• unit test

Release notes

Documentation Changes

Examples with status OK and Warning

➜  waleed k get policyconfig my-config -o yaml
apiVersion: pac.weave.works/v2beta2
kind: PolicyConfig
metadata:
  annotations:
    kubectl.kubernetes.io/last-applied-configuration: |
      {"apiVersion":"pac.weave.works/v2beta2","kind":"PolicyConfig","metadata":{"annotations":{},"name":"my-config"},"spec":{"config":{"weave.policies.containers-minimum-replica-count":{"parameters":{"replica_count":3}}},"match":{"namespaces":["dev","prod"]}}}
  creationTimestamp: "2023-02-13T09:51:11Z"
  generation: 2
  name: my-config
  resourceVersion: "1401"
  uid: 9b3e05bf-d9c2-4baa-9461-885a6d35c3a0
spec:
  config:
    weave.policies.containers-minimum-replica-count:
      parameters:
        replica_count: 3
  match:
    namespaces:
    - dev
    - prod
status:
  status: OK


➜  waleed k get policyconfig my-app-config -o yaml
apiVersion: pac.weave.works/v2beta2
kind: PolicyConfig
metadata:
  annotations:
    kubectl.kubernetes.io/last-applied-configuration: |
      {"apiVersion":"pac.weave.works/v2beta2","kind":"PolicyConfig","metadata":{"annotations":{},"name":"my-app-config"},"spec":{"config":{"weave.policies.policy-1":{"parameters":{"replica_count":3}},"weave.policies.policy-2":{"parameters":{"run_as_root":true}}},"match":{"resources":[{"kind":"Deployment","name":"my-deployment","namespace":"default"}]}}}
  creationTimestamp: "2023-02-13T09:51:19Z"
  generation: 11
  name: my-app-config
  resourceVersion: "11591"
  uid: a72d57ec-e778-465d-bf26-4fea78282290
spec:
  config:
    weave.policies.policy-1:
      parameters:
        replica_count: 3
    weave.policies.policy-2:
      parameters:
        run_as_root: true
  match:
    resources:
    - kind: Deployment
      name: my-deployment
      namespace: default
status:
  missingPolicies:
  - weave.policies.policy-2
  - weave.policies.policy-1
  status: Warning

[codecov]

Codecov Report

Merging #142 (f137d7e) into dev (12e8e0c) will decrease coverage by 1.35%.
The diff coverage is 50.84%.

❗ Current head f137d7e differs from pull request most recent head a2b964c. Consider uploading reports for the commit a2b964c to get more accurate results

@@            Coverage Diff             @@
##              dev     #142      +/-   ##
==========================================
- Coverage   80.86%   79.52%   -1.35%     
==========================================
  Files          14       14              
  Lines         831      884      +53     
==========================================
+ Hits          672      703      +31     
- Misses        120      137      +17     
- Partials       39       44       +5     

Flag	Coverage Δ
unit	79.52% <50.84%> (-1.35%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
controllers/policy_controller.go	71.87% <ø> (+2.17%)	⬆️
controllers/policyconfig_controller.go	62.72% <50.84%> (-6.37%)	⬇️

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[serboctor]

LGTM