Add a Prometheus metric to track host certificate expiry

[nvazquez]

Description

This PR adds a new metric for Prometheus which tracks host certificate expiry

Types of changes

• Breaking change (fix or feature that would cause existing functionality to change)
• New feature (non-breaking change which adds functionality)
• Bug fix (non-breaking change which fixes an issue)
• Enhancement (improves an existing feature and functionality)
• Cleanup (Code refactoring and cleanup, that may add test cases)
• Build/CI
• Test (unit or integration test code)

Feature/Enhancement Scale or Bug Severity

Feature/Enhancement Scale

• Major
• Minor

Bug Severity

• BLOCKER
• Critical
• Major
• Minor
• Trivial

Screenshots (if appropriate):

How Has This Been Tested?

How did you try to break this feature and the system with this change?

[nvazquez]

@blueorangutan package

[blueorangutan]

@nvazquez a [SL] Jenkins job has been kicked to build packages. It will be bundled with KVM, XenServer and VMware SystemVM templates. I'll keep you posted as I make progress.

[codecov]

Codecov Report

❌ Patch coverage is 54.54545% with 10 lines in your changes missing coverage. Please review.
✅ Project coverage is 16.27%. Comparing base (a0f35a1) to head (842e96a).

Files with missing lines	Patch %	Lines
...che/cloudstack/metrics/PrometheusExporterImpl.java	54.54%	10 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               4.20   #12613      +/-   ##
============================================
- Coverage     16.27%   16.27%   -0.01%     
+ Complexity    13433    13431       -2     
============================================
  Files          5662     5662              
  Lines        500033   500137     +104     
  Branches      60717    60718       +1     
============================================
+ Hits          81368    81373       +5     
- Misses       409591   409690      +99     
  Partials       9074     9074              

Flag	Coverage Δ
uitests	4.15% <ø> (ø)
unittests	17.12% <54.54%> (-0.01%)	⬇️

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[DaanHoogland]

nice

[blueorangutan]

Packaging result [SF]: ✔️ el8 ✔️ el9 ✔️ el10 ✔️ debian ✔️ suse15. SL-JID 16750

[nvazquez]

@blueorangutan package

[blueorangutan]

@nvazquez a [SL] Jenkins job has been kicked to build packages. It will be bundled with KVM, XenServer and VMware SystemVM templates. I'll keep you posted as I make progress.

[blueorangutan]

Packaging result [SF]: ✔️ el8 ✔️ el9 ✔️ el10 ✔️ debian ✔️ suse15. SL-JID 16765

[nvazquez]

@blueorangutan test

[blueorangutan]

@nvazquez a [SL] Trillian-Jenkins test job (ol8 mgmt + kvm-ol8) has been kicked to run smoke tests

[DaanHoogland]

clgtm