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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/scripts/demo-buildpacks-memory.sh
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#!/usr/bin/env bash
# The buildpacks image under common container memory limits. The Paketo memory calculator runs
# before the JVM and refuses to launch if its fixed regions do not fit.
# -> docs/output/buildpacks-memory.txt
set -uo pipefail
source "$(dirname "$0")/env.sh"
run() { # label, docker args...
local label="$1"; shift
local name="bpm-$$"; docker rm -f "$name" > /dev/null 2>&1
docker run -d --name "$name" "$@" sbd/docker-images:buildpacks > /dev/null
for _ in $(seq 1 100); do
docker logs "$name" 2>&1 | grep -qE 'Started ImagesApplication|failed to launch' && break; sleep 0.1
done
echo "## $label"
docker logs "$name" 2>&1 | grep -E 'Calculated JVM Memory|unable to calculate|fixed memory regions|failed to launch|Started ImagesApplication' \
| sed -E 's/^[0-9T:.-]+Z +INFO 1 --- \[docker-images\] \[ +main\] com.ankurm.images.ImagesApplication +: //; s/\x1b\[[0-9;]*m//g' | cut -c1-230
echo "state: $(docker inspect -f '{{.State.Status}} (exit {{.State.ExitCode}})' "$name")"
echo
docker rm -f "$name" > /dev/null
}
{
run "docker run -m 512m" -m 512m
run "docker run -m 768m" -m 768m
run "docker run -m 512m -e BPL_JVM_THREAD_COUNT=50" -m 512m -e BPL_JVM_THREAD_COUNT=50
} | tee "$OUT/buildpacks-memory.txt"