Claude
03bdf7ee87
Companion module for the rewritten ankurm.com Prometheus/Grafana monitoring post. Verified against a real running grafana/otel-lgtm container (not mocked): 8 real requests produce a real orders_placed_total metric queried back from the bundled Prometheus-compatible API with zero management.otlp.* properties, auto-wired entirely by Boot's Docker Compose service-connection detection. Two real findings surfaced along the way and documented rather than smoothed over: @Observed silently produces no span without an explicit ObservedAspect bean (AspectJ weaving alone is not sufficient, despite Micrometer Tracing being active), and OTEL_EXPORTER_OTLP_ENDPOINT already worked on Boot 4.0 via Micrometer's own OtlpConfig fallback -- what's actually new in 4.1 is the rest of the standard OTEL_* surface (verified with OTEL_METRIC_EXPORT_INTERVAL against identical source compiled on both Boot 4.0.8 and 4.1.1). Also fixes the root README's module table, which was missing a row for resilience4j-circuit-breaker (added in a previous commit but never indexed here).
38 lines
1.6 KiB
Bash
Executable File
38 lines
1.6 KiB
Bash
Executable File
#!/usr/bin/env bash
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# Rebuilds and runs the env-var-proof/boot40 vs boot41 experiment described in
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# docs/03-otel-env-vars.md, and regenerates docs/output/04-otel-env-vars-4.0-vs-4.1.txt.
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# Requires JDK 25 and network access (each module resolves its own Boot parent POM).
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set -euo pipefail
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cd "$(dirname "$0")/.."
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ROOT="$(pwd)"
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mkdir -p env-var-proof/stub-receiver/out
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javac env-var-proof/stub-receiver/StubOtlpReceiver.java -d env-var-proof/stub-receiver/out
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(cd env-var-proof/boot40 && mvn -q -DskipTests package)
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(cd env-var-proof/boot41 && mvn -q -DskipTests package)
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run_case() {
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local label="$1" jar="$2" port="$3"
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shift 3
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local log="/tmp/otel-proof-${label}.log"
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rm -f "$log"
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java -cp env-var-proof/stub-receiver/out StubOtlpReceiver "$port" "$log" &
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local receiver_pid=$!
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sleep 1
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echo "=== $label ==="
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env "$@" timeout 30 java -jar "$jar" | grep -E "Publishing metrics" || true
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kill "$receiver_pid" 2>/dev/null || true
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echo "--- receiver log ($label) ---"
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cat "$log"
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}
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run_case "boot41-env-vars" "env-var-proof/boot41/target/otel-env-proof-41-1.0.0.jar" 24318 \
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OTEL_EXPORTER_OTLP_ENDPOINT="http://localhost:24318" OTEL_METRIC_EXPORT_INTERVAL=2000
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run_case "boot40-env-vars" "env-var-proof/boot40/target/otel-env-proof-40-1.0.0.jar" 24319 \
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OTEL_EXPORTER_OTLP_ENDPOINT="http://localhost:24319" OTEL_METRIC_EXPORT_INTERVAL=2000
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run_case "boot40-management-props" "env-var-proof/boot40/target/otel-env-proof-40-1.0.0.jar" 24320 \
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MANAGEMENT_OTLP_METRICS_EXPORT_URL="http://localhost:24320/v1/metrics" MANAGEMENT_OTLP_METRICS_EXPORT_STEP=2s
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echo "Compare the three receiver logs above against docs/output/04-otel-env-vars-4.0-vs-4.1.txt"
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