sidh4u/tomcat repository overview

⁠sidh4u/tomcat - Custom Tomcat Docker Image

A custom Apache Tomcat image optimized for enterprise-grade Java workloads, built on Amazon Linux 2023 minimal with support for dynamic runtime configuration, enhanced observability, and performance. It uses minimal jre (version 21).

⁠🔧 Key Features

• Custom Base Image
  Based on Amazon Linux 2023 with Corretto JDK/JRE split for optimized multi-stage builds.

• Tomcat Native Integration
  Compiled and included libtcnative-1.so for improved SSL and performance via APR.

• JMX Exporter Support
  Preconfigured Prometheus JMX Exporter for JVM metrics collection.

• External Config Support
  Designed to allow runtime injection of application.properties, log4j2.properties, etc., using entrypoint.sh.

• Container-Optimized Logging
  Logs to STDOUT/STDERR using log4j2 configuration, suitable for container log aggregation tools.

• Security Hardening

  • Removes default webapps
  • Uses secure server.xml configurations

⁠📦 Example Usage

FROM sidh4u/tomcat:latest

COPY configuration /configuration
COPY target/*.war /usr/local/tomcat/webapps/

ENTRYPOINT ["/entrypoint.sh"]
CMD ["catalina.sh", "run"]

• configuration/ contains application config files.
• A sample entrypoint.sh present. You can extend it as per your need.
• WAR file is auto-expanded at runtime by Tomcat.