diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..2e05659
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,10 @@
+FROM ubuntu:16.04
+
+RUN  apt-get update && \
+  DEBIAN_FRONTEND=noninteractive apt-get -y install git build-essential && \
+  DEBIAN_FRONTEND=noninteractive apt-get -y install python python-dev python-all python-stdeb fakeroot pypi2deb && \
+  DEBIAN_FRONTEND=noninteractive apt-get -y install python-pip libmysqlclient-dev libssl-dev libffi-dev libvirt-dev && \
+  DEBIAN_FRONTEND=noninteractive pip install --upgrade pip && \
+  DEBIAN_FRONTEND=noninteractive pip install --upgrade setuptools && \
+  DEBIAN_FRONTEND=noninteractive apt-get -y install python-argcomplete python-jsonschema python-logutils python-mysqldb python-paramiko python-requests python-yaml python-bottle python-libvirt
+
diff --git a/Jenkinsfile b/Jenkinsfile
new file mode 100644
index 0000000..8faa181
--- /dev/null
+++ b/Jenkinsfile
@@ -0,0 +1,38 @@
+pipeline {
+	agent {
+		label "pipeline"
+	}
+	stages {
+		stage("Build") {
+			agent {
+				dockerfile true
+			}
+			steps {
+				sh 'make package'
+				stash name: "deb-files", includes: ".build/*.deb"
+			}
+		}
+		stage("Unittest") {
+			agent {
+				dockerfile true
+			}
+			steps {
+				sh 'echo "UNITTEST"'
+			}
+		}
+		stage("Repo Component") {
+			agent any
+			steps {
+				unstash "deb-files"
+				sh '''
+					mkdir -p pool/openvim
+					mv .build/*.deb pool/openvim/
+					mkdir -p dists/ReleaseOne/unstable/openvim/binary-amd64/
+					apt-ftparchive packages pool/openvim > dists/ReleaseOne/unstable/openvim/binary-amd64/Packages
+					gzip -9fk dists/ReleaseOne/unstable/openvim/binary-amd64/Packages
+					'''
+				archiveArtifacts artifacts: "dists/**,pool/openvim/*.deb"
+			}
+		}
+	}
+}
diff --git a/Makefile b/Makefile
index 8a16ee1..3214870 100644
--- a/Makefile
+++ b/Makefile
@@ -12,7 +12,7 @@
 	find osm_openvim -name '*.pyo' -delete
 
 prepare_lite:
-	pip install --upgrade setuptools
+	pip install --user --upgrade setuptools
 	mkdir -p build
 	VER1=$(shell git describe | sed -e 's/^v//' |cut -d- -f1); \
 	VER2=$(shell git describe | cut -d- -f2); \
@@ -38,7 +38,7 @@
 	sed -i "s/import osm_openvim; print osm_openvim\.__path__\[0\]/import lib_osm_openvim; print lib_osm_openvim\.__path__\[0\]/g" build/lib_osm_openvim/database_utils/migrate_vim_db.sh
 
 prepare:
-	pip install --upgrade setuptools
+	pip install --user --upgrade setuptools
 	mkdir -p build
 	VER1=$(shell git describe | sed -e 's/^v//' |cut -d- -f1); \
 	VER2=$(shell git describe | cut -d- -f2); \
@@ -76,14 +76,14 @@
 	cd build && cp osm_openvim/scripts/python-osm-openvim.postinst deb_dist/osm-openvim*/debian/
 	cd build/deb_dist/osm-openvim* && dpkg-buildpackage -rfakeroot -uc -us
 	mkdir -p .build
-	cp build/deb_dist/python-*.deb ./build/
+	cp build/deb_dist/python-*.deb .build/
 
 package_lib: clean prepare_lite
 	#apt-get install -y python-stdeb
 	cd build && python setup.py --command-packages=stdeb.command sdist_dsc --with-python2=True
 	cd build/deb_dist/lib-osm-openvim* && dpkg-buildpackage -rfakeroot -uc -us
 	mkdir -p .build
-	cp build/deb_dist/python-*.deb ./build/
+	cp build/deb_dist/python-*.deb .build/
 
 package: clean_deb package_openvim package_lib
 
diff --git a/database_utils/install-db-server.sh b/database_utils/install-db-server.sh
index 5a9b9ab..0599b57 100755
--- a/database_utils/install-db-server.sh
+++ b/database_utils/install-db-server.sh
@@ -1,63 +1,133 @@
 #!/usr/bin/env bash
 
+DB_NAME='vim_db'
+DB_ADMIN_USER="root"
+DB_USER="vim"
+DB_PASS="vimpw"
+DB_ADMIN_PASSWD=""
+DB_PORT="3306"
+DB_HOST=""
+DB_HOST_PARAM=""
+QUIET_MODE=""
+FORCEDB=""
+UPDATEDB=""
+NO_PACKAGES=""
+UNINSTALL=""
+
+
 function usage(){
     echo -e "usage: sudo $0 [OPTIONS]"
-    echo -e "Install openvim database server"
+    echo -e "Install openvim database server and the needed packages"
     echo -e "  OPTIONS"
-    echo -e "     -U USER:    database admin user. 'root' by default. Prompts if needed"
+    echo -e "     -U USER:    database admin user. '$DB_ADMIN_USER' by default. Prompts if needed"
     echo -e "     -P PASS:    database admin password to be used or installed. Prompts if needed"
-    echo -e "     -d: d database name, default name  vim_db"
-    echo -e "     -u: database user, default name  vim"
-    echo -e "     -p: database pass, default name  vimpw"
+    echo -e "     -d: database name, '$DB_NAME' by default"
+    echo -e "     -u: database user, '$DB_USER' by default"
+    echo -e "     -p: database pass, '$DB_PASS' by default"
+    echo -e "     -H: HOST  database host. 'localhost' by default"
+    echo -e "     -T: PORT  database port. '$DB_PORT' by default"
     echo -e "     -q --quiet: install in unattended mode"
     echo -e "     -h --help:  show this help"
-    echo -e "     --forcedb:  reinstall vim_db DB, deleting previous database if exists and creating a new one"
-    echo -e "     --no-install-packages: <deprecate> use this option to skip updating and installing the requires packages. This avoid wasting time if you are sure requires packages are present e.g. because of a previous installation"
-    echo -e "     --unistall: Delete DB, by default vim_db"
+    echo -e "     --forcedb:  if database exists, it is dropped and a new one is created"
+    echo -e "     --updatedb: if database exists, it preserves the content and it is updated to the needed version"
+    echo -e "     --no-install-packages: use this option to skip updating and installing the requires packages. This avoid wasting time if you are sure requires packages are present e.g. because of a previous installation"
+    echo -e "     --unistall: delete database"
+}
 
+function install_packages(){
+    [ -x /usr/bin/apt-get ] && apt-get install -y $*
+    [ -x /usr/bin/yum ]     && yum install     -y $*   
+    
+    #check properly installed
+    for PACKAGE in $*
+    do
+        PACKAGE_INSTALLED="no"
+        [ -x /usr/bin/apt-get ] && dpkg -l $PACKAGE            &>> /dev/null && PACKAGE_INSTALLED="yes"
+        [ -x /usr/bin/yum ]     && yum list installed $PACKAGE &>> /dev/null && PACKAGE_INSTALLED="yes" 
+        if [ "$PACKAGE_INSTALLED" = "no" ]
+        then
+            echo "failed to install package '$PACKAGE'. Revise network connectivity and try again" >&2
+            exit 1
+       fi
+    done
+}
 
+function _install_mysql_package(){
+    echo '
+    #################################################################
+    #####               INSTALL REQUIRED PACKAGES               #####
+    #################################################################'
+    [ "$_DISTRO" == "Ubuntu" ] && ! install_packages "mysql-server" && exit 1
+    [ "$_DISTRO" == "CentOS" -o "$_DISTRO" == "Red" ] && ! install_packages "mariadb mariadb-server" && exit 1
+
+    if [[ "$_DISTRO" == "Ubuntu" ]]
+    then
+        #start services. By default CentOS does not start services
+        service mysql start >> /dev/null
+        # try to set admin password, ignore if fails
+        [[ -n $DBPASSWD ]] && mysqladmin -u $DB_ADMIN_USER -s password $DB_ADMIN_PASSWD
+    fi
+
+    if [ "$_DISTRO" == "CentOS" -o "$_DISTRO" == "Red" ]
+    then
+        #start services. By default CentOS does not start services
+        service mariadb start
+        service httpd   start
+        systemctl enable mariadb
+        systemctl enable httpd
+        read -e -p "Do you want to configure mariadb (recommended if not done before) (Y/n)" KK
+        [ "$KK" != "n" -a  "$KK" != "no" ] && mysql_secure_installation
+
+        read -e -p "Do you want to set firewall to grant web access port 80,443  (Y/n)" KK
+        [ "$KK" != "n" -a  "$KK" != "no" ] &&
+            firewall-cmd --permanent --zone=public --add-service=http &&
+            firewall-cmd --permanent --zone=public --add-service=https &&
+            firewall-cmd --reload
+    fi
 }
 
 function _create_db(){
     echo '
     #################################################################
-    #####               CREATE DATABASE                         #####
+    #####        CREATE AND INIT DATABASE                       #####
     #################################################################'
-    echo -e "\nCreating temporary file for MYSQL installation and initialization"
-    TEMPFILE="$(mktemp -q --tmpdir "installopenvim.XXXXXX")"
-    trap 'rm -f "$TEMPFILE"' EXIT
-    chmod 0600 "$TEMPFILE"
-    echo -e "[client]\n user='${DB_ADMIN_USER}'\n password='$DB_ADMIN_PASSWD'">"$TEMPFILE"
-
-    if db_exists $DB_NAME $TEMPFILE ; then
-        if [[ -n $FORCEDB ]]; then
-            DBDELETEPARAM=""
-            [[ -n $QUIET_MODE ]] && DBDELETEPARAM="-f"
-            mysqladmin  --defaults-extra-file=$TEMPFILE -s drop ${DB_NAME} $DBDELETEPARAM || ! echo "Could not delete ${DB_NAME} database" || exit 1
-            mysqladmin  --defaults-extra-file=$TEMPFILE -s create ${DB_NAME} || ! echo "1 Error creating ${DB_NAME} database" || exit 1
-            echo "CREATE USER $DB_USER@'localhost' IDENTIFIED BY '$DB_PASS';"   | mysql --defaults-extra-file=$TEMPFILE -s || ! echo "2 Failed while creating user ${DB_USER}"
-            echo "GRANT ALL PRIVILEGES ON ${DB_NAME}.* TO $DB_USER@'localhost';" | mysql --defaults-extra-file=$TEMPFILE -s || ! echo "3 Failed while granting privileges to user ${DB_USER} at database ${DB_NAME}" || exit 1
-            echo " Database '${DB_NAME}' created, user $DB_USER password '$DB_PASS'"
-        else
-            echo "Database exists. Use option '--forcedb' to force the deletion of the existing one" && exit 1
-        fi
-    else
-        echo "mysqladmin -u$DB_ADMIN_USER $DBPASSWD_PARAM -s create ${DB_NAME}"
-
-        mysqladmin -u$DB_ADMIN_USER $DBPASSWD_PARAM -s create ${DB_NAME} || ! echo "4 Error creating ${DB_NAME} database" || exit 1
-        echo "CREATE USER $DB_USER@'localhost' IDENTIFIED BY '$DB_PASS';"   | mysql --defaults-extra-file=$TEMPFILE -s || ! echo "Failed while creating user vim at database"
-        echo "GRANT ALL PRIVILEGES ON ${DB_NAME}.* TO $DB_USER@'localhost';" | mysql --defaults-extra-file=$TEMPFILE -s || ! echo "Failed giving creating user vim at database" || exit 1
-        echo " Database '${DB_NAME}' created, user $DB_USER password '$DB_PASS'"
-    fi
+    echo "mysqladmin --defaults-extra-file="$TEMPFILE" -s create ${DB_NAME}"
+    mysqladmin --defaults-extra-file="$TEMPFILE" -s create ${DB_NAME} \
+        || ! echo "Error creating ${DB_NAME} database" >&2 \
+        || exit 1
+    echo "CREATE USER $DB_USER@'localhost' IDENTIFIED BY '$DB_PASS';"   | mysql --defaults-extra-file="$TEMPFILE" -s 2>/dev/null \
+        || echo "Warning: User '$DB_USER' cannot be created at database. Probably exist" >&2
+    echo "GRANT ALL PRIVILEGES ON ${DB_NAME}.* TO '$DB_USER'@'localhost';" | mysql --defaults-extra-file="$TEMPFILE" -s \
+        || ! echo "Error: Granting privileges to user '$DB_USER' at database" >&2 \
+        || exit 1
+    echo " Database '${DB_NAME}' created, user '$DB_USER' password '$DB_PASS'"
+    DIRNAME=$(dirname $(readlink -f ${BASH_SOURCE[0]}))
+    ${DIRNAME}/init_vim_db.sh -u"$DB_USER" -p"$DB_PASS" -d"$DB_NAME" -P"$DB_PORT" $DB_HOST_PARAM \
+        || ! echo "Error initializing database '$DB_NAME'" >&2 \
+        || exit 1
 }
 
-function _init_db(){
+function _delete_db(){
+   mysqladmin --defaults-extra-file="$TEMPFILE" -s drop "${DB_NAME}" $DBDELETEPARAM \
+       || ! echo "Error: Could not delete '${DB_NAME}' database" >&2 \
+       || exit 1
+}
+
+function _update_db(){
     echo '
     #################################################################
-    #####        INIT DATABASE                                  #####
+    #####        UPDATE DATABASE                                #####
     #################################################################'
+    echo "CREATE USER $DB_USER@'localhost' IDENTIFIED BY '$DB_PASS';" | mysql --defaults-extra-file="$TEMPFILE" -s 2>/dev/null \
+        || echo "Warning: User '$DB_USER' cannot be created at database. Probably exist" >&2
+    echo "GRANT ALL PRIVILEGES ON ${DB_NAME}.* TO '$DB_USER'@'localhost';" | mysql --defaults-extra-file="$TEMPFILE" -s \
+        || ! echo "Error: Granting privileges to user '$DB_USER' at database" >&2 \
+        || exit 1
+    echo " Granted privileges to user '$DB_USER' password '$DB_PASS' to existing database '${DB_NAME}'"
     DIRNAME=$(dirname $(readlink -f ${BASH_SOURCE[0]}))
-    su $SUDO_USER -c "${DIRNAME}/init_vim_db.sh -u $DB_USER -p $DB_PASS -d ${DB_NAME}" || ! echo "Failed while initializing database" || exit 1
+    ${DIRNAME}/migrate_vim_db.sh -u"$DB_USER" -p"$DB_PASS" -d"$DB_NAME" -P"$DB_PORT" $DB_HOST_PARAM \
+        || ! echo "Error updating database '$DB_NAME'" >&2 \
+        || exit 1
 }
 
 function _uninstall_db(){
@@ -67,36 +137,28 @@
     #################################################################'
     DBDELETEPARAM=""
     [[ -n $QUIET_MODE ]] && DBDELETEPARAM="-f"
-    mysqladmin  --defaults-extra-file=$TEMPFILE -s drop ${DB_NAME} $DBDELETEPARAM || ! echo "Could not delete ${DB_NAME} database" || exit 1
-
+    _delete_db
 }
-function db_exists() {
+
+function db_exists(){  # (db_name, credential_file)
+    # check credentials
+    mysqlshow --defaults-extra-file="$2" >/dev/null  || exit 1
     RESULT=`mysqlshow --defaults-extra-file="$2" | grep -v Wildcard | grep -o $1`
     if [ "$RESULT" == "$1" ]; then
-        echo " DB $1 exists"
+        # echo " DB $1 exists"
         return 0
     fi
-    echo " DB $1 does not exist"
+    # echo " DB $1 does not exist"
     return 1
 }
-DB_NAME='vim_db'
-DB_ADMIN_USER="root"
-DB_USER="vim"
-DB_PASS="vimpw"
-DB_ADMIN_PASSWD=""
-DBPASSWD_PARAM=""
-QUIET_MODE=""
-FORCEDB=""
-NO_PACKAGES=""
-UNINSTALL=""
-while getopts ":U:P:d:u:p:hiq-:" o; do
+
+while getopts ":U:P:d:u:p:H:T:hiq-:" o; do
     case "${o}" in
         U)
             export DB_ADMIN_USER="$OPTARG"
             ;;
         P)
             export DB_ADMIN_PASSWD="$OPTARG"
-            export DBPASSWD_PARAM="-p$OPTARG"
             ;;
         d)
             export DB_NAME="$OPTARG"
@@ -107,6 +169,13 @@
         p)
             export DB_PASS="$OPTARG"
             ;;
+        H)
+            export DB_HOST="$OPTARG"
+            export DB_HOST_PARAM="-h$DB_HOST"
+            ;;
+        T)
+            export DB_PORT="$OPTARG"
+            ;;
         q)
             export QUIET_MODE=yes
             export DEBIAN_FRONTEND=noninteractive
@@ -117,6 +186,7 @@
         -)
             [ "${OPTARG}" == "help" ] && usage && exit 0
             [ "${OPTARG}" == "forcedb" ] && FORCEDB="y" && continue
+            [ "${OPTARG}" == "updatedb" ] && UPDATEDB="y" && continue
             [ "${OPTARG}" == "quiet" ] && export QUIET_MODE=yes && export DEBIAN_FRONTEND=noninteractive && continue
             [ "${OPTARG}" == "no-install-packages" ] && export NO_PACKAGES=yes && continue
             [ "${OPTARG}" == "uninstall" ] &&  UNINSTALL="y" && continue
@@ -137,36 +207,38 @@
             ;;
     esac
 done
-
-HERE=$(realpath $(dirname $0))
-OPENVIM_BASEFOLDER=$(dirname $HERE)
-[ "$USER" != "root" ] && echo "Needed root privileges" >&2 && exit -1
-
-if [[ -z "$SUDO_USER" ]] || [[ "$SUDO_USER" = "root" ]]
-then
-    export SUDO_USER='root'
+if [ -n "$FORCEDB" ] && [ -n "$UPDATEDB" ] ; then
+    echo "Error: options --forcedb and --updatedb are mutually exclusive" >&2
+    exit 1
 fi
 
-#Discover Linux distribution
-#try redhat type
+# Discover Linux distribution
+# try redhat type
 [ -f /etc/redhat-release ] && _DISTRO=$(cat /etc/redhat-release 2>/dev/null | cut  -d" " -f1)
-#if not assuming ubuntu type
+# if not assuming ubuntu type
 [ -f /etc/redhat-release ] || _DISTRO=$(lsb_release -is  2>/dev/null)
 
+# Creating temporary file for MYSQL installation and initialization"
+TEMPFILE="$(mktemp -q --tmpdir "installdb.XXXXXX")"
+trap 'rm -f "$TEMPFILE"' EXIT
+chmod 0600 "$TEMPFILE"
+echo -e "[client]\n user='${DB_ADMIN_USER}'\n password='$DB_ADMIN_PASSWD'\n host='$DB_HOST'\n port='$DB_PORT'" > "$TEMPFILE"
+
 #check and ask for database user password. Must be done after database installation
-if [[ -n $QUIET_MODE ]]
+if [[ -z $QUIET_MODE ]]
 then
     echo -e "\nCheking database connection and ask for credentials"
-    echo "mysqladmin -s -u$DB_ADMIN_USER $DBPASSWD_PARAM status >/dev/null"
-    while ! mysqladmin -s -u$DB_ADMIN_USER $DBPASSWD_PARAM status >/dev/null
+    # echo "mysqladmin --defaults-extra-file=$TEMPFILE -s status >/dev/null"
+    while ! mysqladmin --defaults-extra-file="$TEMPFILE" -s status >/dev/null
     do
         [ -n "$logintry" ] &&  echo -e "\nInvalid database credentials!!!. Try again (Ctrl+c to abort)"
         [ -z "$logintry" ] &&  echo -e "\nProvide database credentials"
-        read -e -p "database user? ($DB_ADMIN_USER) " DBUSER_
+        read -e -p "database admin user? ($DB_ADMIN_USER) " DBUSER_
         [ -n "$DBUSER_" ] && DB_ADMIN_USER=$DBUSER_
-        read -e -s -p "database password? (Enter for not using password) " DBPASSWD_
-        [ -n "$DBPASSWD_" ] && DB_ADMIN_PASSWD="$DBPASSWD_" && DBPASSWD_PARAM="-p$DBPASSWD_"
-        [ -z "$DBPASSWD_" ] && DB_ADMIN_PASSWD=""           && DBPASSWD_PARAM=""
+        read -e -s -p "database admin password? (Enter for not using password) " DBPASSWD_
+        [ -n "$DBPASSWD_" ] && DB_ADMIN_PASSWD="$DBPASSWD_"
+        [ -z "$DBPASSWD_" ] && DB_ADMIN_PASSWD=""
+        echo -e "[client]\n user='${DB_ADMIN_USER}'\n password='$DB_ADMIN_PASSWD'\n host='$DB_HOST'\n port='$DB_PORT'" > "$TEMPFILE"
         logintry="yes"
     done
 fi
@@ -177,11 +249,36 @@
     exit
 fi
 
-
 if [[ -z "$NO_PACKAGES" ]]
 then
-    _create_db
-    _init_db
+    [ "$USER" != "root" ] && echo "Needed root privileges" >&2 && exit 1
+    _install_mysql_package || exit 1
 fi
 
+# Create or update database
+if db_exists $DB_NAME $TEMPFILE ; then
+    if [[ -n $FORCEDB ]] ; then
+        # DBDELETEPARAM=""
+        # [[ -n $QUIET_MODE ]] && DBDELETEPARAM="-f"
+        DBDELETEPARAM="-f"
+        _delete_db
+        _create_db
+    elif [[ -n $UPDATEDB ]] ; then
+        _update_db
+    elif [[ -z $QUIET_MODE ]] ; then
+        echo "database '$DB_NAME' exist. Reinstall it?"
+        read -e -p "Type 'y' to drop and reinstall exiting database (content will be lost), Type 'n' to update existing database (y/N)? " KK_
+        if [ "$KK_" == "yes" ] || [ "$KK_" != "y" ] ; then
+            _delete_db
+            _create_db
+        else
+            _update_db
+        fi
+    else
+        echo "Database '$DB_NAME' exists. Use option '--forcedb' to force the deletion of the existing one, or '--updatedb' to use existing one and update it"
+        exit 1
+    fi
+else
+    _create_db
+fi
 
diff --git a/osm_openvim/ovim.py b/osm_openvim/ovim.py
index a4108b6..f253912 100755
--- a/osm_openvim/ovim.py
+++ b/osm_openvim/ovim.py
@@ -36,7 +36,7 @@
 import threading
 import vim_db
 import logging
-import imp
+# import imp
 import argparse
 from netaddr import IPNetwork
 from jsonschema import validate as js_v, exceptions as js_e
@@ -371,27 +371,29 @@
                 module = temp_dict['of_controller']
 
             if module not in ovim.of_module:
-                module_info = imp.find_module(module)
-                of_conn_module = imp.load_module("OF_conn", *module_info)
-                ovim.of_module[module] = of_conn_module
+                for base in ("", "osm_openvim.", "lib_osm_openvim."):
+                    try:
+                        pkg = __import__(base + module)
+                        if base:
+                            of_conn_module = getattr(pkg, module)
+                        else:
+                            of_conn_module = pkg
+                        ovim.of_module[module] = of_conn_module
+                        self.logger.debug("Module load from {}".format(base + module))
+                        break
+                    except Exception as e:
+                        self.logger.warning("Module {} not found {}".format(base + module, e))
+                else:
+                    self.logger.error("Cannot open openflow controller module of type '%s'", module)
+                    raise ovimException("Cannot open openflow controller of type module '{}'"
+                                        "Revise it is installed".format(module),
+                                        HTTP_Internal_Server_Error)
             else:
                 of_conn_module = ovim.of_module[module]
-
-            try:
-                return of_conn_module.OF_conn(temp_dict)
-            except Exception as e:
-                self.logger.error("Cannot open the Openflow controller '%s': %s", type(e).__name__, str(e))
-                if module_info and module_info[0]:
-                    file.close(module_info[0])
-                raise ovimException("Cannot open the Openflow controller '{}': '{}'".format(type(e).__name__, str(e)),
-                                    HTTP_Internal_Server_Error)
-        except (IOError, ImportError) as e:
-            if module_info and module_info[0]:
-                file.close(module_info[0])
-            self.logger.error("Cannot open openflow controller module '%s'; %s: %s; revise 'of_controller' "
-                              "field of configuration file.", module, type(e).__name__, str(e))
-            raise ovimException("Cannot open openflow controller module '{}'; {}: {}; revise 'of_controller' "
-                                "field of configuration file.".format(module, type(e).__name__, str(e)),
+            return of_conn_module.OF_conn(temp_dict)
+        except Exception as e:
+            self.logger.error("Cannot open the Openflow controller '%s': %s", type(e).__name__, str(e))
+            raise ovimException("Cannot open the Openflow controller '{}': '{}'".format(type(e).__name__, str(e)),
                                 HTTP_Internal_Server_Error)
 
     def _create_ofc_thread(self, of_conn, ofc_uuid="Default"):