inital pass at adding terraform for the k8s charms

[asbalderson]

Applicable spec: https://docs.google.com/document/d/1EG71A2pJ244PQRaGVzGj7Mx2B_bzE4U_OSqx4eeVI1E/edit?tab=t.0

Overview

Adds basic terraform modules for the k8s charms

Rationale

Enable deploying canonical k8s with terraform

Juju Events Changes

N/A

Module Changes

N/A

Library Changes

N/A

Checklist

• The charm style guide was applied
• The contributing guide was applied
• The changes are compliant with ISD054 - Managing Charm Complexity
• The documentation is generated using src-docs
• The documentation for charmhub is updated
• The PR is tagged with appropriate label (urgent, trivial, complex)

[louiseschmidtgen]

Did a first pass on the templates, thank you so much for your work! I believe these should find a separate repo to live in.

[asbalderson]

Adjusted from feedback

Also made some adjustments getting from the test deployment on prodstack like fixing the names of the endpoints

[louiseschmidtgen]

Thanks @asbalderson for addressing my comments! Some more little nits and questions then we should be good to go.

Bonus points if you could add some module and functional tests. Else, we can create those later on.

[addyess]

@asbalderson before you push another commit here, please pull to get in sync with this branch

[asbalderson]

Comments from review

[louiseschmidtgen]

LGTM, one little nit to the Readme. Confirmed things are deploying on my end as well.
Awesome work, thank you so much!

[github-actions]

Test coverage for 4c2de99

coverage-report: install_deps /home/runner/work/k8s-operator/k8s-operator/charms/worker/k8s> python -I -m pip install 'coverage[toml]'
coverage-report: commands[0] /home/runner/work/k8s-operator/k8s-operator/charms/worker/k8s> coverage report
Name                                    Stmts   Miss  Cover
-----------------------------------------------------------
lib/charms/k8s/v0/k8sd_api_manager.py     278     29    90%
src/charm.py                              497    250    50%
src/cloud_integration.py                   80      3    96%
src/config/extra_args.py                   29      2    93%
src/containerd.py                         140     16    89%
src/cos_integration.py                     33     12    64%
src/events/update_status.py                51     10    80%
src/inspector.py                           40      4    90%
src/kube_control.py                        39     31    21%
src/literals.py                            21      0   100%
src/protocols.py                           26      5    81%
src/reschedule.py                          77      4    95%
src/snap.py                               185     26    86%
src/token_distributor.py                  181    109    40%
src/upgrade.py                            105     48    54%
-----------------------------------------------------------
TOTAL                                    1782    549    69%
coverage-report: OK (1.24=setup[1.02]+cmd[0.22] seconds)
congratulations :) (1.29 seconds)

Static code analysis report

Run started:2024-12-13 20:10:18.902288

Test results:
  No issues identified.

Code scanned:
  Total lines of code: 3818
  Total lines skipped (#nosec): 3
  Total potential issues skipped due to specifically being disabled (e.g., #nosec BXXX): 0

Run metrics:
  Total issues (by severity):
  	Undefined: 0
  	Low: 0
  	Medium: 0
  	High: 0
  Total issues (by confidence):
  	Undefined: 0
  	Low: 0
  	Medium: 0
  	High: 0
Files skipped (0):