Remove the JDK parameter java.awt.headless=true (#748)

There is a a lot of evidence that the parameter is set to `java.awt.headless=true` in Quarkus by default. * Quarkus Building native Images: https://quarkus.io/guides/building-native-image) see default value for `java.awt.headless` * quarkusio/quarkus#20565 * quarkusio/quarkus#20850 Signed-off-by: Gabriel Mainberger <gabriel.mainberger@vshn.net> Co-authored-by: Gabriel Mainberger <gabriel.mainberger@vshn.net>
codecentric · Jul 5, 2024 · 6c41154 · 6c41154
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diff --git a/charts/keycloakx/README.md b/charts/keycloakx/README.md
@@ -268,7 +268,6 @@ extraEnv: |
   - name: JAVA_OPTS
     value: >-
       -XX:MaxRAMPercentage=50.0
-      -Djava.awt.headless=true
 ```
 
 Alternatively one can append custom JVM options by setting the `JAVA_OPTS_APPEND` environment variable.
@@ -277,6 +276,8 @@ The parameter `-Djava.net.preferIPv4Stack=true` is [optional](https://github.com
 
 The parameter `-XX:+UseContainerSupport` is no longer required for [Keycloak >= v21 based on JDK v17](https://github.com/keycloak/keycloak/blob/release/21.0/quarkus/container/Dockerfile#L20).
 
+The parameter `-Djava.awt.headless=true` is no longer required for Quarkus based Keycloak as it is set by [default](https://quarkus.io/guides/building-native-image).
+
 #### Using an External Database
 
 The Keycloak Docker image supports various database types.

diff --git a/charts/keycloakx/ci/h2-values.yaml b/charts/keycloakx/ci/h2-values.yaml
@@ -18,7 +18,6 @@ extraEnv: |
   - name: JAVA_OPTS_APPEND
     value: >-
       -XX:MaxRAMPercentage=50.0
-      -Djava.awt.headless=true
       -Djgroups.dns.query={{ include "keycloak.fullname" . }}-headless
 
 database:

diff --git a/charts/keycloakx/examples/postgresql-kubeping/keycloak-server-values.yaml b/charts/keycloakx/examples/postgresql-kubeping/keycloak-server-values.yaml
@@ -36,7 +36,6 @@ extraEnv: |
   - name: JAVA_OPTS_APPEND
     value: >-
       -XX:MaxRAMPercentage=50.0
-      -Djava.awt.headless=true
       -Dkubeping_namespace={{ .Release.Namespace }}
       -Dkubeping_label="keycloak-cluster=default"
 

diff --git a/charts/keycloakx/examples/postgresql/keycloak-server-values.yaml b/charts/keycloakx/examples/postgresql/keycloak-server-values.yaml
@@ -24,7 +24,6 @@ extraEnv: |
   - name: JAVA_OPTS_APPEND
     value: >-
       -XX:MaxRAMPercentage=50.0
-      -Djava.awt.headless=true
       -Djgroups.dns.query={{ include "keycloak.fullname" . }}-headless
 
 dbchecker: