🌱 In-tree test operator

[perdasilva]

Description

Adds the scaffolding for the test-operator in versions v1 and v2 using operator-sdk. The test-operator is a basic echo service.

The test-operator supports AllNamespaces, SingleNamespace, and OwnNamespace install modes.
v1 has validating and mutating webhooks
v2 has validating, mutating and conversion webhooks

TODO

• test/test-operator/Makefile: tie in the building of the controllers, bundles, and catalog
• test/test-operator/test-operator-catalog.json: test-operator package catalog
• either remove validating and mutating webhooks for v1, or from v2 to reduce complexity (don't need them in both)

Thing we should feel confident in doing in the future

• Producing different kinds of bundles: helm, registry+v2, etc.
• Adding more bundles (though we probably want to keep the general number low)

Risks

• Dependency (CRD) between v1 and v2, i.e. cha

v1

A reconciled test-operator v1 resource would look like this:

apiVersion: testolm.operator-framework.io/v1
kind: TestOperator
metadata:
  name: test-operator
spec:
  message: "hello"
status:
  echo: "hello"

The v1 operator also includes a validating and mutating webhook. The validating webhook validates .spec.message against a keyword and rejects admission if its found. The mutating webhook is used as a "defaulting" webhook that sets .spec.message to the default message of Echo.

v2

A reconciled test-operator v2 resource would look like this:

apiVersion: testolm.operator-framework.io/v2
kind: TestOperator
metadata:
  name: test-operator
spec:
  echoMessage: "hello"
status:
  echo: "hello"

The same webhooks are available for v2 apis + a conversion webhook to support the CRD upgrade.

Reviewer Checklist

• API Go Documentation
• Tests: Unit Tests (and E2E Tests, if appropriate)
• Comprehensive Commit Messages
• Links to related GitHub Issue(s)

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 73.31%. Comparing base (22a990c) to head (665d459).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2070      +/-   ##
==========================================
- Coverage   74.66%   73.31%   -1.36%     
==========================================
  Files          81       77       -4     
  Lines        7365     7056     -309     
==========================================
- Hits         5499     5173     -326     
- Misses       1528     1542      +14     
- Partials      338      341       +3     

Flag	Coverage Δ
e2e	44.98% <ø> (+0.92%)	⬆️
experimental-e2e	51.25% <ø> (+1.16%)	⬆️
unit	58.27% <ø> (-1.97%)	⬇️

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