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Add docker-images: one Spring Boot 4 service packaged nine ways

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Companion code for "Dockerizing Spring Boot 4: Layered Jars, Buildpacks,
Distroless and Image Size Benchmarks". Fat jar on JDK and JRE, layered jar
on Debian, Alpine and distroless, jlink, the JDK 25 AOT cache, Paketo
buildpacks and Jib, each measured for size on disk and pushed, rebuild
delta, startup, user and shell. Also PID 1 and signal handling, the jdeps
module gap, AOT cache mismatches and buildpacks memory calculation.
Transcripts in docs/output/, regenerated by scripts/run-all.sh.

Co-Authored-By: Claude Opus 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01C3TETMrqVUWeFkNtz3Jbo3
This commit is contained in:
asmhatre
2026-09-11 17:11:46 +00:00
co-authored by Claude Opus 5
parent 86246dc860
commit 644da9e65e
52 changed files with 1308 additions and 1 deletions
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docker-images/docs/output/jlink-metrics.txt
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# jlink modules chosen by jdeps alone:
java.base java.compiler java.datatransfer java.desktop java.instrument java.logging java.management java.naming java.net.http java.prefs java.scripting java.security.jgss java.security.sasl java.sql java.transaction.xa java.xml jdk.jfr jdk.unsupported
# WARN lines at startup of the jdeps-only image:
i.m.c.i.binder.jvm.JvmGcMetrics : GC notifications will not be available because com.sun.management.GarbageCollectionNotificationInfo is not present
i.m.c.i.binder.jvm.JvmGcMetrics : GC notifications will not be available because no GarbageCollectorMXBean of the JVM provides any. GCs=[G1 Young Generation, G1 Concurrent GC, G1 Old Generation]
# Metric names: full JRE 61, jdeps-only 46, jdeps + jdk.management 58
# Present with the full JRE, missing from the jdeps-only image:
jvm_gc_concurrent_phase_time_seconds_count
jvm_gc_concurrent_phase_time_seconds_max
jvm_gc_concurrent_phase_time_seconds_sum
jvm_gc_live_data_size_bytes
jvm_gc_max_data_size_bytes
jvm_gc_memory_allocated_bytes_total
jvm_gc_memory_promoted_bytes_total
jvm_gc_pause_seconds_count
jvm_gc_pause_seconds_max
jvm_gc_pause_seconds_sum
process_cpu_time_ns_total
process_cpu_usage
process_files_max_files
process_files_open_files
system_cpu_usage
# Missing from jdeps + jdk.management: 3
jvm_gc_concurrent_phase_time_seconds_count
jvm_gc_concurrent_phase_time_seconds_max
jvm_gc_concurrent_phase_time_seconds_sum
# (jvm_gc_concurrent_phase_time_* is registered lazily, after the first G1 concurrent cycle -
# whether it appears within a few seconds of startup varies run to run, in either image.)