00-custom-cloudbees-core-cm-with-external-logs.md

This is a Dockerfile and docker-compose.yml to run a custom CloudBees Core Traditional Client Master that has the /var/jenkins_support as an exposed volume

docker-compose.yml

version: "2.4"

services:
  cm:
    container_name: cm
    image: darinpope/cloudbees-core-cm:2.176.4.3
    restart: unless-stopped
    ports:
      - "8080:8080"
      - "50000:50000"
    ulimits:
      core:
        soft: -1
        hard: -1
      fsize:
        soft: -1
        hard: -1
      nofile:
        soft: 4096
        hard: 8192
      nproc:
        soft: 30654
        hard: 30654
    healthcheck:
      test: curl -sS http://localhost:8080/ha/health-check | grep "Running as primary" || exit 1
      interval: 10s
      timeout: 2s
      retries: 3
      start_period: 60s
    mem_limit: 6144m
    mem_reservation: 4300m
    environment:
      JAVA_OPTS: "
        -Xms4300m
        -Xmx4300m
        -Dcb.BeekeeperProp.noFullUpgrade=true
        -Dcom.cloudbees.jenkins.ha=false
        -Dhudson.TcpSlaveAgentListener.hostName=<hostname of the machine here>
        -Dhudson.TcpSlaveAgentListener.port=50000
        -Djenkins.model.Jenkins.logStartupPerformance=true
        -Dhudson.udp=-1
        -Dhudson.DNSMultiCast.disabled=true
        -Dorg.apache.commons.jelly.tags.fmt.timeZone=America/New_York
        -Duser.timezone=America/New_York
        -Djava.awt.headless=true
        -XX:+AlwaysPreTouch
        -XX:+HeapDumpOnOutOfMemoryError
        -XX:HeapDumpPath=/var/jenkins_support
        -XX:ErrorFile=/var/jenkins_support/hs_err_%p.log
        -XX:+UseG1GC
        -XX:+UseStringDeduplication
        -XX:+ParallelRefProcEnabled
        -XX:+DisableExplicitGC
        -XX:+UnlockDiagnosticVMOptions
        -XX:+UnlockExperimentalVMOptions
        -verbose:gc
        -Xloggc:/var/jenkins_support/gc-%t.log
        -XX:NumberOfGCLogFiles=2
        -XX:+UseGCLogFileRotation
        -XX:GCLogFileSize=100m
        -XX:+PrintGC
        -XX:+PrintGCDateStamps
        -XX:+PrintGCDetails
        -XX:+PrintHeapAtGC
        -XX:+PrintGCCause
        -XX:+PrintTenuringDistribution
        -XX:+PrintReferenceGC
        -XX:+PrintAdaptiveSizePolicy
        -XX:+LogVMOutput
        -XX:LogFile=/var/jenkins_support/jvm.log
        "
    volumes:
      - ./data/cm/jenkins_home:/var/jenkins_home
      - ./data/cm/jenkins_support:/var/jenkins_support

Dockerfile

FROM cloudbees/cloudbees-core-cm:2.176.4.3
USER root
VOLUME /var/jenkins_support
RUN chown -R jenkins:jenkins /var/jenkins_support
USER jenkins