Configure Confluent Control Center base image with Jemalloc

c3-jemalloc.md

Configure Control Center with Jemalloc

Create the Dockerfile (vim Dockerfile):

FROM confluentinc/cp-enterprise-control-center:7.5.2
USER root
RUN dnf install -y https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm && dnf install -y jemalloc-devel
USER appuser
ENV LD_PRELOAD=/usr/lib64/libjemalloc.so

Build the Dockerfile:

docker build . -t alexjbleasdale/cp-enterprise-control-center-jemalloc:7.5.2
docker push alexjbleasdale/cp-enterprise-control-center-jemalloc:7.5.2

Test:

cd confluent-dockerfiles/simple-broker-kraft-c3jemalloc-sr
docker compose up

SSH into C3 instance:

docker compose exec control-center bash

Find the process id:

ps aux

If you want to see the full command, you can run:

echo "$(ps aux)"

You should see the PID:

USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
appuser      1 19.5  4.6 9478020 1341780 ?     Ssl  15:39   4:01 java -cp /usr/share/java/acl/*:/usr/share/java/confluent-control-center/*

Run pmap -x 1

pmap -x 1 | grep jemalloc

You should see:

[appuser@control-center lib64]$ pmap -x 1 | grep jemalloc
00007f79ebe00000     528     384       0 r-x-- libjemalloc.so.2
00007f79ebe84000    2044       0       0 ----- libjemalloc.so.2
00007f79ec083000      24      24      16 r---- libjemalloc.so.2
00007f79ec089000       4       4       4 rw--- libjemalloc.so.2