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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/buildpacks-memory.txt
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## docker run -m 512m
unable to calculate memory configuration
fixed memory regions require 595872K which is greater than 512M available for allocation: -XX:MaxDirectMemorySize=10M, -XX:MaxMetaspaceSize=83872K, -XX:ReservedCodeCacheSize=240M, -Xss1M * 250 threads
ERROR: failed to launch: exec.d: failed to execute exec.d file at path '/layers/paketo-buildpacks_bellsoft-liberica/helper/exec.d/memory-calculator': exit status 1
state: exited (exit 82)
## docker run -m 768m
Calculated JVM Memory Configuration: -XX:MaxDirectMemorySize=10M -Xmx190559K -XX:MaxMetaspaceSize=83872K -XX:ReservedCodeCacheSize=240M -Xss1M (Total Memory: 768M, Thread Count: 250, Loaded Class Count: 12394, Headroom: 0%)
Started ImagesApplication in 3.884 seconds (process running for 4.423)
state: running (exit 0)
## docker run -m 512m -e BPL_JVM_THREAD_COUNT=50
Calculated JVM Memory Configuration: -XX:MaxDirectMemorySize=10M -Xmx133215K -XX:MaxMetaspaceSize=83872K -XX:ReservedCodeCacheSize=240M -Xss1M (Total Memory: 512M, Thread Count: 50, Loaded Class Count: 12394, Headroom: 0%)
Started ImagesApplication in 3.846 seconds (process running for 4.353)
state: running (exit 0)