Eclipse JKube Images

This repository hosts part of the container images used by Eclipse JKube.

These images are available on Quay.io

Available images

jkube-java

Base image to be used by any JavaExecGenerator implementation. The image is based on ubi9/ubi-minimal (catalog.redhat.com) with stripped down dependencies to make it lighter.

The image contains the run-java.sh script added by jboss.container.java.run.bash module.

Available environment variables for runtime configuration:

JAVA_APP_DIR The directory where the application resides. All paths in your application are relative to this directory.
JAVA_LIB_DIR Directory holding the Java jar files as well an optional classpath file which holds the classpath. Either as a single line classpath (colon separated) or with jar files listed line-by-line. If not set JAVA_LIB_DIR is the same as JAVA_APP_DIR.
JAVA_OPTIONS JVM options passed to the java command. Use JAVA_OPTIONS.
JAVA_OPTS JVM options passed to the java command.

JAVA_INITIAL_MEM_RATIO Is used when no -Xms option is given in JAVA_OPTIONS. This is used to calculate a default initial heap memory based on the maximum heap memory. If used in a container without any memory constraints for the container then this option has no effect. If there is a memory constraint then -Xms is set to a ratio of the -Xmx memory as set here. The default is 25 which means 25% of the -Xmx is used as the initial heap size. You can skip this mechanism by setting this value to 0 in which case no -Xms option is added.
JAVA_MAX_MEM_RATIO Is used when no -Xmx option is given in JAVA_OPTIONS. This is used to calculate a default maximal heap memory based on a containers restriction. If used in a container without any memory constraints for the container then this option has no effect. If there is a memory constraint then -Xmx is set to a ratio of the container available memory as set here. The default is 50 which means 50% of the available memory is used as an upper boundary. You can skip this mechanism by setting this value to 0 in which case no -Xmx option is added.
JAVA_DIAGNOSTICS Set this to get some diagnostics information to standard output when things are happening. Disabled by default.
JAVA_MAIN_CLASS A main class to use as argument for java. When this environment variable is given, all jar files in JAVA_APP_DIR are added to the classpath as well as JAVA_LIB_DIR.
JAVA_APP_JAR A jar file with an appropriate manifest so that it can be started with java -jar if no $JAVA_MAIN_CLASS is set. In all cases this jar file is added to the classpath, too.
JAVA_APP_NAME Name to use for the process.
JAVA_CLASSPATH The classpath to use. If not given, the startup script checks for a file **JAVA_APP_DIR/classpath** and use its content literally as classpath. If this file doesn't exist all jars in the app dir are added (classes:**JAVA_APP_DIR/***).
JAVA_DEBUG If set remote debugging will be switched on. Disabled by default.
JAVA_DEBUG_SUSPEND If set enables suspend mode in remote debugging
JAVA_DEBUG_PORT Port used for remote debugging. Defaults to 5005.
HTTP_PROXY The location of the http proxy. This takes precedence over http_proxy, and will be used for both Maven builds and Java runtime.
HTTPS_PROXY The location of the https proxy. This takes precedence over http_proxy and HTTP_PROXY,
and will be used for both Maven builds and Java runtime.
no_proxy / NO_PROXY A comma separated lists of hosts, IP addresses or domains that can be accessed directly. This will be used for both Maven builds and Java runtime.
AB_PROMETHEUS_OFF Disables the use of Prometheus Java Agent.
AB_PROMETHEUS_PORT Port to use for the Prometheus JMX Exporter.