Staging: reduce concurrent builds from 3 to 2

[krusche]

Summary

• Reduced concurrent build size from 3 to 2 for all staging build agents

Motivation

The staging build agents only have 4 CPUs and 4GB RAM, which is insufficient to run the Artemis Spring server plus 3 concurrent builds simultaneously.

This was causing Docker daemon freezes due to resource exhaustion, leading to:

• Build timeouts
• Stale build jobs that had to be force-cancelled
• Failed builds

Changes

• artemis_staging1.yml: concurrent_build_size 3 → 2
• artemis_staging2.yml: concurrent_build_size 3 → 2
• artemis_staging_localci_nodes_buildagent.yml: concurrent_build_size 3 → 2

Testing

Already applied manually to staging1 build agents and verified working via the REST API:

staging1agent01: maxConcurrent=2
staging1agent02: maxConcurrent=2
staging1agent03: maxConcurrent=2

Summary by CodeRabbit

• Chores
  • Reduced concurrent build capacity in staging environments from 3 to 2, which may impact build queue throughput and processing times.

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📝 Walkthrough

Walkthrough

Three staging environment configuration files have been updated to reduce the concurrent_build_size parameter from 3 to 2 under their local CI settings, decreasing the number of allowed parallel builds.

Changes

Cohort / File(s)	Summary
Local CI Configuration Updates group_vars/artemis_staging1.yml, group_vars/artemis_staging2.yml, group_vars/artemis_staging_localci_nodes_buildagent.yml	Decreased concurrent_build_size from 3 to 2 under continuous_integration.localci across three staging environment configurations.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Poem

🐰 Three builds once danced with vigor and pace,
But two's the tempo that wins the race!
From staging to staging, the reduction flows,
A leaner pipeline—configuration glows! ✨

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'Staging: reduce concurrent builds from 3 to 2' directly and accurately summarizes the main change across all three modified staging configuration files.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch fix/staging-concurrent-builds

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