A test image for memory limit. e.g., to test k8s resource quota.
docker run -e INCREASE=10 -e INITIAL=100 memory-hole
INCREASE=10 means increase 10MB every 1 second. 0 means no increasing.
INITIAL=100 means starts with 100MB.
JVM itself consumes memory so the initial heap is at least 50MB.
JVM allocate memory in batch, so the heap allocation will not be accurate as 1MB per second.
Note, this test application will respect the container limit, you can verify this by
docker run -m 300MB openjdk:17 java -XX:MaxRAMPercentage=100 -XshowSettings:VM -versionliveness: GET /health/liveness
readiness: GET /health/readiness
To toggle a probe to on/off
curl -sv -X PUT http://localhost:8080/health/liveness\?status\=false
or
curl -sv -X PUT http://localhost:8080/health/liveness\?status\=true
./gradlew clean build
docker built -t memory-hole .
Will rewrite it in C when I have spare time.