protected void updateRangerKmsDbUrl() throws AmbariException {
    AmbariManagementController ambariManagementController = injector.getInstance(AmbariManagementController.class);
    Clusters clusters = ambariManagementController.getClusters();
    if (clusters != null) {
      Map<String, Cluster> clusterMap = clusters.getClusters();
      if (clusterMap != null && !clusterMap.isEmpty()) {
        for (final Cluster cluster : clusterMap.values()) {
          Set<String> installedServices = cluster.getServices().keySet();
          if (installedServices.contains("RANGER_KMS")) {
            Config rangerKmsPropertiesConfig = cluster.getDesiredConfigByType("kms-properties");
            Config rangerKmsEnvConfig = cluster.getDesiredConfigByType("kms-env");
            Config rangerKmsDbksConfig = cluster.getDesiredConfigByType("dbks-site");
            if (rangerKmsPropertiesConfig != null) {
              String dbFlavor = rangerKmsPropertiesConfig.getProperties().get("DB_FLAVOR");
              String dbHost = rangerKmsPropertiesConfig.getProperties().get("db_host");
              String rangerKmsRootDbUrl = "";
              if (dbFlavor != null && dbHost != null) {
                String port = "";
                if (rangerKmsDbksConfig != null) {
                  String rangerKmsDbUrl = rangerKmsDbksConfig.getProperties().get("ranger.ks.jpa.jdbc.url");
                  if (rangerKmsDbUrl != null) {
                    Pattern pattern = Pattern.compile("(:[0-9]+)");
                    Matcher matcher = pattern.matcher(rangerKmsDbUrl);
                    if (matcher.find()) {
                      port = matcher.group();
                    }
                  }
                }
                if ("MYSQL".equalsIgnoreCase(dbFlavor)) {
                  rangerKmsRootDbUrl = "jdbc:mysql://" + dbHost + (!port.equalsIgnoreCase("")?port:":3306");
                } else if ("ORACLE".equalsIgnoreCase(dbFlavor)) {
                  rangerKmsRootDbUrl = "jdbc:oracle:thin:@//" + dbHost + (!port.equalsIgnoreCase("")?port:":1521");
                } else if ("POSTGRES".equalsIgnoreCase(dbFlavor)) {
                  rangerKmsRootDbUrl = "jdbc:postgresql://" + dbHost + (!port.equalsIgnoreCase("")?port:":5432") + "/postgres";
                } else if ("MSSQL".equalsIgnoreCase(dbFlavor)) {
                  rangerKmsRootDbUrl = "jdbc:sqlserver://" + dbHost + (!port.equalsIgnoreCase("")?port:":1433");
                } else if ("SQLA".equalsIgnoreCase(dbFlavor)) {
                  rangerKmsRootDbUrl = "jdbc:sqlanywhere:host=" + dbHost + (!port.equalsIgnoreCase("")?port:":2638") + ";";
                }
                Map<String, String> newProperty = new HashMap<String, String>();
                newProperty.put("ranger_kms_privelege_user_jdbc_url", rangerKmsRootDbUrl);
                if (rangerKmsEnvConfig != null) {
                  updateConfigurationPropertiesForCluster(cluster, "kms-env", newProperty, true, false);
                }
              }
            }
          }
        }
      }
    }
  }
Updating JDBC connection url in Ranger KMS for verifying communication to database
using database root user credentials
@throws AmbariException
ambari-server/src/main/java/org/apache/ambari/server/upgrade/UpgradeCatalog271.java