Include number of expected runners in reconciliation metric

[cbartz]

Applicable spec: n/a

Overview & Rationale

Adaptions for canonical/github-runner-manager#28

Update "Runners after reconciliation" dashboard panel to include expected number of runners

Note that the number of expected runners is not available for reactive runners, so you may need to filter out reactive runners in the application filter to get a more meaningful visualisation.

Update "Available runners" dashboard panel to visualise max expected number of runners.

Juju Events Changes

Module Changes

runner_manager: Change LXD runner manager to issue the metric.

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).
• The changelog is updated with changes that affects the users of the charm.
• The changes do not introduce any regression in code or tests related to LXD runner mode.

[jdkandersson]

Could we also add it to the chart with the green horizontal bars that show the available runners? Perhaps as a vertical stack or something?

[cbartz]

Could we also add it to the chart with the green horizontal bars that show the available runners? Perhaps as a vertical stack or something?

Updated.

[github-actions]

Test coverage for 1d6a934

Name                         Stmts   Miss Branch BrPart  Cover   Missing
------------------------------------------------------------------------
src/charm.py                   630    166    140     27    70%   247-249, 315-334, 352-354, 355->359, 385-389, 463-465, 474, 481-483, 504-509, 526-532, 553, 565-571, 586-587, 606-607, 616, 621, 651-652, 654->663, 658->663, 668-674, 708, 712-717, 768-773, 782->785, 808-820, 824-825, 853-880, 893-898, 917-927, 942-944, 991-992, 994-995, 997-998, 1077->1079, 1144-1145, 1183-1185, 1193-1199, 1277-1310, 1324-1329, 1344-1387, 1395-1396, 1418
src/charm_state.py             450     17     82      3    95%   274-286, 505-509, 631-632, 687-688, 1123->1126, 1130-1131, 1178
src/errors.py                   25      0      0      0   100%
src/event_timer.py              52      6      0      0    88%   105-106, 143-144, 160-161
src/firewall.py                 51     18     10      0    67%   42-43, 66-69, 111-185
src/github_client.py            23      2      4      0    93%   71-72
src/logrotate.py                43      0      2      0   100%
src/lxd_type.py                 35      0      0      0   100%
src/runner_manager_type.py      39      0      0      0   100%
src/runner_type.py              38      0      0      0   100%
src/shared_fs.py                98     17     10      1    83%   60-61, 132-133, 162-163, 171-172, 178-179, 210, 213-214, 226-227, 270-271
src/utilities.py                32      4      6      2    79%   66-69, 111
------------------------------------------------------------------------
TOTAL                         1516    230    254     33    83%

Static code analysis report

Run started:2024-10-25 09:21:07.754036

Test results:
  No issues identified.

Code scanned:
  Total lines of code: 5049
  Total lines skipped (#nosec): 2
  Total potential issues skipped due to specifically being disabled (e.g., #nosec BXXX): 6

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):