Add workflow for building runner image

[yhaliaw]

Overview

The runner image is built within the charm on a schedule.

Rationale

Building the runner images allow for pre-loading packages, and modifying configurations.

This PR will enable SCTP support which should be included in the e2e test.

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)

WIP

[github-actions]

license-eye has totally checked 104 files.

Valid	Invalid	Ignored	Fixed
48	1	55	0

Click to see the invalid file list

• scripts/build-image.sh

[cbartz]

Could you please update the PR description, as it seems in this PR no workflow is used to build the images on a daily basis and push them to github, but the images are built in the charm itself periodically.

[jdkandersson]

Do we need any updates to the documentation here please? Perhaps to the architecture to explain that the image is built now and re-used?

[cbartz]

LGTM

[yhaliaw]

Do we need any updates to the documentation here please? Perhaps to the architecture to explain that the image is built now and re-used?

Updated the docs

[github-actions]

Test coverage for ae68a59

Name                         Stmts   Miss Branch BrPart  Cover   Missing
------------------------------------------------------------------------
src/charm.py                   432     98    107     25    75%   79-80, 86-88, 112-113, 117-119, 155-157, 168->180, 178, 221-229, 241-245, 276, 358-363, 384, 401-402, 411-434, 452-454, 462-465, 472, 475-476, 492, 496-501, 546->549, 562-563, 565-566, 600-607, 631-632, 644-646, 661-662, 687-688, 690-691, 693-694, 768->770, 831-832, 848, 866-868, 872
src/charm_state.py              75      6     10      0    91%   90-97
src/errors.py                   34      0      0      0   100%
src/event_timer.py              42      8      4      0    74%   94-97, 117-120
src/firewall.py                 43     25     10      0    38%   38-42, 64-67, 75-149
src/github_client.py            50      6     24      2    84%   116, 138, 150-157
src/github_type.py              36      0      0      0   100%
src/lxd_type.py                 37      0      2      0   100%
src/metrics.py                  67      2     10      1    96%   60->63, 150-151
src/runner.py                  315     64     92     23    74%   44->46, 129, 256-257, 298-307, 331-336, 341, 361, 365-375, 424->427, 430-432, 439, 453, 463, 467, 469, 484, 510-515, 531-544, 555-587, 592, 630, 676-678, 682, 700, 735, 761, 766-778, 792, 797->799
src/runner_manager.py          245     33     82      7    85%   117, 162-164, 177-178, 190-192, 198-203, 207-208, 218-219, 238, 367, 386-390, 415, 498, 606-609, 613-620
src/runner_manager_type.py      30      0      6      0   100%
src/runner_metrics.py          112      5     22      2    95%   133-134, 146, 215-216
src/runner_type.py              45      0     10      0   100%
src/shared_fs.py                80     10     12      0    89%   73-74, 160-161, 166-167, 173-174, 196-197
src/utilities.py                68      6     20      8    84%   74->76, 78->84, 89-91, 121, 135, 173, 226
------------------------------------------------------------------------
TOTAL                         1711    263    411     68    82%

Static code analysis report

Run started:2023-12-08 09:58:38.236017

Test results:
  No issues identified.

Code scanned:
  Total lines of code: 3802
  Total lines skipped (#nosec): 0
  Total potential issues skipped due to specifically being disabled (e.g., #nosec BXXX): 12

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):