testing external directory for branch 2021.02.xx (#7468)

* checked externalisation

* removed tested config

* remove externalization

* Update Dockerfile

Co-authored-by: Alessandro Parma <alessa.parma@gmail.com>

Author: krishnaglodha

Dockerfile

@@ -14,12 +14,19 @@ RUN if [ "$TOMCAT_EXTRAS" = false ]; then \
 # Add war files to be deployed
 COPY docker/*.war "${CATALINA_BASE}/webapps/"
 
+#name of the external dir
+ENV DATA_DIR="/data"
+RUN mkdir -p ${DATA_DIR}/configs
+#add all files you want to copy to the external dir
+# COPY newext.json /data/configs/new.json 
+
 # Geostore externalization template. Disabled by default
 COPY docker/geostore-datasource-ovr.properties "${CATALINA_BASE}/conf/"
 ARG GEOSTORE_OVR_OPT=""
-ENV JAVA_OPTS="${JAVA_OPTS} ${GEOSTORE_OVR_OPT}"
+ENV JAVA_OPTS="${JAVA_OPTS} ${GEOSTORE_OVR_OPT} -Ddatadir.location=${DATA_DIR}"
 
 # Set variable to better handle terminal commands
 ENV TERM xterm
+VOLUME [ "${DATA_DIR}" ]
 
 EXPOSE 8080