<Context>
  <Parameter name="GEOSERVER_DATA_DIR"
             value="/var/opt/geoserver/data" override="false"/>
  <Parameter name="GEOSERVER_REQUIRE_FILE"
             value="/var/opt/geoserver/data/global.xml" override="false"/>
  <Parameter name="GEOWEBCACHE_CACHE_DIR"
             value="/var/opt/geoserver/tilecache" override="false"/>
</Context>