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Java Base Image

This repository contains the Dockerfiles for our generic java base image that ships with a small startup script, providing essential features that can be useful in some contexts:

  • extending your Java Truststore with a set of CA certificates
  • setting a javaagent flag for easier instrumentation of monitoring and troubleshooting tools

The configuration is completly done using environment variables.

Usages

FROM demtag/java-base-image:corretto-17
COPY /some/path/application.jar /app/application.jar
CMD ["-jar", "/app/backend.jar"]

Environment Variables

Variable Description
JVM_EXTRA_CERTS Path to the directory containing all the CA-certificates that should be added to the trust store. Only files ending on .pem are respected.
JAVA_AGENT_LOCATION Path to the jar file that should be loaded with the -javaagent flag. If this variable is set and the file does not exist, the startup scripts exits with a error code.
JAVA_SECURITY_SKIP_EGD If this variable is set, no java.security.egd property will be provided for the java process.
DEBUG If this propert is set, the full startup command will be printed before execution.