Informational variables

Table 1. Table Informational variables

Name

Value

Description

HOME

/home/default

-

JAVA_DATA_DIR

/deployments/data

^ The location of the directory which should be used by the application for reading/writing application data. Users should override the default if their application should use a different directory, e.g. if a persistent volume is used to persist data across restarts.

JAVA_HOME

/usr/lib/jvm/jre

-

JAVA_VENDOR

openjdk

-

JAVA_VERSION

17

-

JBOSS_CONTAINER_JAVA_JVM_MODULE

/opt/jboss/container/java/jvm

-

JBOSS_CONTAINER_JAVA_PROXY_MODULE

/opt/jboss/container/java/proxy

-

JBOSS_CONTAINER_JAVA_RUN_MODULE

/opt/jboss/container/java/run

-

JBOSS_CONTAINER_OPENJDK_JRE_MODULE

/opt/jboss/container/openjdk/jre

-

JBOSS_CONTAINER_UTIL_LOGGING_MODULE

/opt/jboss/container/util/logging/

-

Configuration variables

Table 2. Table Configuration variables

Name

Example

Description

GC_ADAPTIVE_SIZE_POLICY_WEIGHT

90

The weighting given to the current GC time versus previous GC times.

GC_CONTAINER_OPTIONS

-XX:+UseG1GC

specify Java GC to use. The value of this variable should contain the necessary JRE command-line options to specify the required GC, which will override the default of -:+UseParallelGC.

GC_MAX_HEAP_FREE_RATIO

40

Maximum percentage of heap free after GC to avoid shrinking.

GC_MAX_METASPACE_SIZE

100

The maximum metaspace size.

GC_METASPACE_SIZE

20

The initial metaspace size.

GC_MIN_HEAP_FREE_RATIO

20

Minimum percentage of heap free after GC to avoid expansion.

GC_TIME_RATIO

4

Specifies the ratio of the time spent outside the garbage collection (for example, the time spent for application execution) to the time spent in the garbage collection.

JAVA_APP_DIR

myapplication/

^ The directory where the application resides. All paths in your application are relative to this directory.

JAVA_APP_NAME

-

To set the process or application name by the user.

JAVA_ARGS

-

Arguments passed to the java application.

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 exists all jars in the app dir are added (classes:JAVA_APP_DIR/*).

JAVA_DEBUG

true

If set remote debugging will be switched on. Disabled by default.

JAVA_DEBUG_PORT

8787

Port used for remote debugging. Defaults to 5005.

JAVA_DIAGNOSTICS

true

Set this to get some diagnostics information to standard output when things are happening. Note: This option, if set to true, will set -XX :+UnlockDiagnosticVMOptions. Disabled by default.

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_MAIN_CLASS

com.example.MainClass

^ 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_MAX_MEM_RATIO

90.0

Specify the maximum heap memory. Corresponds to the JVM argument -XX:MaxRAMPercentage. The default is 80.0 which means 80% of the available memory. You can disable this mechanism by setting the value to 0. The supplied value can be an integer or float, but only the whole number part is used.

JAVA_OPTS

-verbose:class

If set, this prevents all default and generated options (such as JVM and GC tuning, proxy settings, etc.) from being applied. Instead the user should specify exactly the java options they want in this variable.

JAVA_OPTS_APPEND

-Dsome.property=foo

User specified Java options to be appended to the generated options. This variable has no effect if JAVA_OPTS has been defined.

LOGGING_SCRIPT_DEBUG

True

Set to true to enable script debugging.

http_proxy

http://127.0.0.1:8080

The location of the http proxy. This will be used for both Maven builds and Java runtime.

https_proxy

myuser:mypass@127.0.0.1:8080

The location of the https proxy. This takes precedence over http_proxy and will be used for both Maven builds and Java runtime.

no_proxy

foo.example.com,*.example.org

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.