perf(CI): RHICOMPL-3878 enable caching of yum packages between stages

[skateman]

The RUN command in the Dockerfile suppors a two-way overlayed cache mount, i.e. all changes are stored both inside the container and outside the file after the build finishes. In our case this can be utilized to speed up the installation process of the packages in $deps for the second stage. The first stage is explicitly configured to store RPMs and other metadata under /var/cache/yum and doesn't clear the cache upon a successful build. By mounting the same cache for the second stage, there are zero packages downloaded when installing. The microdnf clean all command at the end of the second stage clears both the container's and the host's cache, so the container size remains small and the host will not leak cached RPMs to other test runs.

The whole build process is ~20 seconds faster:

# Before
podman build .  257.70s user 71.00s system 132% cpu 4:08.86 total
# After
podman build .  237.44s user 67.19s system 134% cpu 3:45.85 total

Secure Coding Practices Checklist GitHub Link

• https://github.com/RedHatInsights/secure-coding-checklist

Secure Coding Checklist

• Input Validation
• Output Encoding
• Authentication and Password Management
• Session Management
• Access Control
• Cryptographic Practices
• Error Handling and Logging
• Data Protection
• Communication Security
• System Configuration
• Database Security
• File Management
• Memory Management
• General Coding Practices

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

📢 Thoughts on this report? Let us know!

[skateman]

Seems like podman version on some of our jenkins nodes is too old for this, we need at least 4.1.0

[vkrizan]

Nice!