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Dockerfile
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# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
FROM registry.access.redhat.com/ubi8/openjdk-11
# FROM openjdk:17-jdk
# Tomcat 10.1+ no longer supports Java 8
# FROM openjdk:8-jre
VOLUME /tmp
USER root
RUN groupadd -g 1024 tomcat
RUN useradd -u 1024 -g tomcat -s /sbin/nologin -c "Docker image user" tomcat
RUN mkdir -p /deployments
RUN chmod 755 /deployments
RUN chgrp tomcat /deployments
RUN chown tomcat /deployments
ADD target/tomcat-stuffed-1.0.jar /deployments/app.jar
ADD conf /deployments/conf
ADD webapps /deployments/webapps
ADD server.xml.stuffed /deployments/conf/server.xml
ADD start.sh /opt
ADD usekube.sh /opt
ADD usedns.sh /opt
RUN chmod 755 /opt
RUN chmod 555 /opt/*.sh
RUN chgrp tomcat /opt
RUN chown tomcat /opt
RUN chgrp tomcat /opt/*.sh
RUN chown tomcat /opt/*.sh
# COPY *.war /deployments/
RUN chgrp tomcat /deployments/webapps
RUN chown tomcat /deployments/webapps
RUN chmod 777 /deployments/webapps
WORKDIR /deployments
ARG namespace=tomcat
ENV KUBERNETES_NAMESPACE=$namespace
ARG port=8080
EXPOSE $port
ENV JAVA_OPTS="-Dcatalina.base=. -Djava.security.egd=file:/dev/urandom"
# Add JULI logging configuration
ENV JAVA_OPTS="${JAVA_OPTS} -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.util.logging.config.file=conf/logging.properties"
# OpenSSL integration for Java 17
#ENV JAVA_OPTS="${JAVA_OPTS} --enable-native-access=ALL-UNNAMED --add-modules jdk.incubator.foreign"
RUN sh -c 'touch app.jar'
# Optional: Add Jolokia agent for JMX monitoring and management
# RUN mkdir /opt/jolokia && wget https://repo.maven.apache.org/maven2/org/jolokia/jolokia-jvm/1.7.1/jolokia-jvm-1.7.1.jar -O /opt/jolokia/jolokia.jar
# ARG jolokiaport=8778
# ENV JAVA_OPTS="-javaagent:/opt/jolokia/jolokia.jar=host=*,port=$jolokiaport,protocol=https,authIgnoreCerts=true ${JAVA_OPTS}"
# EXPOSE $jolokiaport
# Optional: Add Prometheus agent for JMX monitoring
# RUN mkdir /opt/prometheus && wget https://repo.maven.apache.org/maven2/io/prometheus/jmx/jmx_prometheus_javaagent/0.16.1/jmx_prometheus_javaagent-0.16.1.jar -O /opt/prometheus/prometheus.jar && wget https://raw.githubusercontent.com/prometheus/jmx_exporter/master/example_configs/tomcat.yml -O conf/prometheus.yaml
# ARG prometheusport=9404
# ENV JAVA_OPTS="-javaagent:/opt/prometheus/prometheus.jar=$prometheusport:conf/prometheus.yaml ${JAVA_OPTS}"
# EXPOSE $prometheusport
USER 1024
ENTRYPOINT [ "/opt/start.sh" ]
# ENTRYPOINT [ "sh", "-c", "java $JAVA_OPTS -jar app.jar" ]
# ENTRYPOINT [ "sh", "-c", "java $JAVA_OPTS -jar app.jar --war myrootwebapp.war --path /mydemo --war demo-1.0.war" ]