diff --git a/installers/install_mongodb.sh b/installers/install_mongodb.sh
index 984eda1..213d2f4 100755
--- a/installers/install_mongodb.sh
+++ b/installers/install_mongodb.sh
@@ -18,7 +18,6 @@
 # Helm chart 13.9.4 correspondes to Mongo DB 6.0.5
 MONGODB_HELM_VERSION=13.9.4
 
-
 # Install MongoDB  helm chart
 function install_mongodb() {
     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
@@ -34,14 +33,6 @@
 }
 
 # main
-
-DOCKER_REGISTRY_URL=
-DOCKER_USER="opensourcemano"
-OSM_DEVOPS="/usr/share/osm-devops"
-OSM_DOCKER_TAG="testing-daily"
-OSM_HELM_WORK_DIR="/etc/osm/helm"
-OSM_NAMESPACE="osm"
-
 while getopts ":D:d:s:t:r:U:-: " o; do
     case "${o}" in
         D)
@@ -81,13 +72,22 @@
     esac
 done
 
-source $OSM_DEVOPS/common/logging
-source $OSM_DEVOPS/common/track
-
+DEBUG_INSTALL=${DEBUG_INSTALL:-}
+OSM_DEVOPS=${OSM_DEVOPS:-"/usr/share/osm-devops"}
+OSM_DOCKER_TAG=${OSM_DOCKER_TAG:-"testing-daily"}
+OSM_HELM_WORK_DIR=${OSM_HELM_WORK_DIR:-"/etc/osm/helm"}
+OSM_NAMESPACE=${OSM_NAMESPACE:-"osm"}
+DOCKER_REGISTRY_URL=${DOCKER_REGISTRY_URL:-}
+DOCKER_USER=${DOCKER_USER:-"opensourcemano"}
 echo "DEBUG_INSTALL=$DEBUG_INSTALL"
 echo "OSM_DEVOPS=$OSM_DEVOPS"
 echo "OSM_DOCKER_TAG=$OSM_DOCKER_TAG"
 echo "OSM_HELM_WORK_DIR=$OSM_HELM_WORK_DIR"
 echo "OSM_NAMESPACE=$OSM_NAMESPACE"
+echo "DOCKER_REGISTRY_URL=$DOCKER_REGISTRY_URL"
+echo "DOCKER_USER=$DOCKER_USER"
+
+source $OSM_DEVOPS/common/logging
+source $OSM_DEVOPS/common/track
 
 install_mongodb