tarendt/docker-generic-app repository overview

⁠Docker image containing Oracle JDK 8 with Java Cryptography Extension

Basic Docker image to run stand alone java applications as user app (499:499)

============================================================================================ Optionally start.sh or simple-start.sh can be used to execute java application jar with specificed parameters: Both scripts handle kill -TERM in trap Both scripts use ExitOnOutOfMemoryError

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simple-start.sh - used globally with simplified approach

JVM_HEAP_MEMORY
 // default -> 512m for JVM_XMS and JVM_XMX

JVM_METASPACE_SIZE // default -> 128M

JVM_MAX_METASPACE_SIZE // default -> 128M

CUSTOM_JAVA_OPTS // default -> (empty)

---

start.sh - used for projects dependent on ldz common components

APP_NAME // default -> $APP_NAME_FROM_JAR (application jar filename parsed to get app name)

LOG_DIR // default -> ${HOME}/logs (HOME=/opt/app as set in Dockerfile)

LOGBACK_PATH // default -> ${HOME}/logback/logback.xml

JAVA_CLASSPATH // default -> -cp ${HOME}/${JAR}:${HOME}/lib/* // $JAR is the jar filename

JVM_XMS // default -> 512m

JVM_XMS // default -> 512m

JVM_METASPACE_SIZE // default -> 128M

JVM_MAX_METASPACE_SIZE // default -> 128M

JAVA_SECURITY_EGD // default -> -Djava.security.egd=file:/dev/./urandom

CUSTOM_JAVA_OPTS // default -> empty

APP_OPTS // default -> -d

DEBUG_PORT // default -> empty (setting this variable will start application in debug mode listening on specified port number)

Script mandatory to be set in docker maven plugin pom.xml:

<cmd>["/opt/app/simple-start.sh"]</cmd>

or

<cmd>["/opt/app/start.sh"]</cmd>