diff --git a/dicos/29_one-master.xml b/dicos/29_one-master.xml
index 574baa8..11567a9 100644
--- a/dicos/29_one-master.xml
+++ b/dicos/29_one-master.xml
@@ -24,9 +24,6 @@
                 <value>oui</value>
             </variable>
             <variable name='vnet_pilote' type='string'  description='Pilote réseau' hidden='True' />
-            <variable name='one_cluster_name' type='string' description="Nom de la grappe OpenNebula" mode='expert' auto_freeze='True' mandatory="True">
-                <value></value>
-            </variable>
             <variable name='vnets'             type='string'  description='Réseaux virtuels Niveau 3' multi='True'/>
             <variable name='vnet_network_addr' type='ip'      description='Adresse du réseau'/>
             <variable name='vnet_network_mask' type='netmask' description='Masque du réseau'/>
@@ -114,10 +111,6 @@
             <param>openvswitch</param>
             <param type="eole" name="condition_1">vnet_pilote</param>
         </auto>
-        <fill name='concat' target='one_cluster_name'>
-          <param>CL-</param>
-          <param type='eole'>numero_etab</param>
-        </fill>
 
         <check name='valid_enum' target='one_video_driver'>
             <param>['qxl','vga','std','cirrus']</param>
@@ -127,7 +120,6 @@
         <condition name='disabled_if_in' source='activer_onesinglenode'>
             <param>non</param>
             <target type='filelist'>onesinglenode</target>
-            <target type='variable'>one_cluster_name</target>
             <target type='variable'>one_ds_system_prefix</target>
             <target type='variable'>one_ds_iso_name</target>
             <target type='variable'>one_ds_image_name</target>
diff --git a/postservice/30-one-mng b/postservice/30-one-mng
index fa5ef8f..05ab4b8 100755
--- a/postservice/30-one-mng
+++ b/postservice/30-one-mng
@@ -21,42 +21,44 @@ function get_one_auth()
     ${CMD} ${FILE}
 }
 
-function check_cluster()
-{
-    name="${1}"
-    cmd="onecluster"
-    opt="list"
-    auth=$(get_one_auth)
+# ref https://dev-eole.ac-dijon.fr/issues/16797
+#function check_cluster()
+#{
+#    name="${1}"
+#    cmd="onecluster"
+#    opt="list"
+#    auth=$(get_one_auth)
+#
+#    res=0
+#    clst_list=$(${cmd} ${opt} --user ${auth%:*} --password ${auth#*:} | tail -n +2 |  awk -F ' ' '{print $2}')
+#    for hst in ${clst_list}
+#    do
+#        [[ "${NAME}" = "${hst}" ]] && res=$((res+1))
+#    done
+#    return ${res}
+#}
 
-    res=0
-    clst_list=$(${cmd} ${opt} --user ${auth%:*} --password ${auth#*:} | tail -n +2 |  awk -F ' ' '{print $2}')
-    for hst in ${clst_list}
-    do
-        [[ "${NAME}" = "${hst}" ]] && res=$((res+1))
-    done
-    return ${res}
-}
-
-function manage_cluster()
-{
-    NAME="${1}"
-    CMD="onecluster create"
-    AUTH=$(get_one_auth)
-
-    check_cluster ${clst_name}
-    if [[ ${?} -eq 0 ]]
-    then
-        crt=$(${CMD} --user ${AUTH%:*} --password ${AUTH#*:} ${NAME})
-        if [[ ${?} -ne 0 ]]
-        then
-            error "Cluster create failed"
-        else
-            echo "Cluster ${NAME} created"
-        fi
-    else
-        echo "Cluster \"${NAME}\" already exist"
-    fi
-}
+# ref https://dev-eole.ac-dijon.fr/issues/16797
+#function manage_cluster()
+#{
+#    NAME="${1}"
+#    CMD="onecluster create"
+#    AUTH=$(get_one_auth)
+#
+#    check_cluster ${clst_name}
+#    if [[ ${?} -eq 0 ]]
+#    then
+#        crt=$(${CMD} --user ${AUTH%:*} --password ${AUTH#*:} ${NAME})
+#        if [[ ${?} -ne 0 ]]
+#        then
+#            error "Cluster create failed"
+#        else
+#            echo "Cluster ${NAME} created"
+#        fi
+#    else
+#        echo "Cluster \"${NAME}\" already exist"
+#    fi
+#}
 
 function check_host()
 {
@@ -190,7 +192,9 @@ function attach_host()
 {
     HOST=${1}
     CLST=${2}
-    CLST_ID=$(get_cluster_id_by_name ${CLST})
+	# ref https://dev-eole.ac-dijon.fr/issues/16797
+    #CLST_ID=$(get_cluster_id_by_name ${CLST})
+	CLST_ID=0
     HST_ID=$(get_host_id_by_name ${HOST})
     AUTH=$(get_one_auth)
     CMD="onecluster"
@@ -226,32 +230,34 @@ function attach_host()
 #
 # Attach a datastore to a cluster
 #
-function attach_ds_to_cluster()
-{
-    DS=${1}
-    CLST=${2}
-    CLST_ID=$(get_cluster_id_by_name ${CLST})
-    DS_ID=$(get_ds_id_by_name ${ds_name})
-    AUTH=$(get_one_auth)
-    CMD="onecluster"
-    OPT="adddatastore ${CLST_ID} ${DS_ID}"
-
-    RES=$(${CMD} ${OPT} --user ${AUTH%:*} --password ${AUTH#*:})
-    if [[ ${?} -ne 0 ]]
-    then
-        error "Attaching ${DS} to ${CLST} failed."
-    else
-        echo "Datastore ${DS} attached to ${CLST}."
-        return 0
-    fi
-    return 0
-}
+# ref https://dev-eole.ac-dijon.fr/issues/16797
+#function attach_ds_to_cluster()
+#{
+#    DS=${1}
+#    CLST=${2}
+#    CLST_ID=$(get_cluster_id_by_name ${CLST})
+#    DS_ID=$(get_ds_id_by_name ${ds_name})
+#    AUTH=$(get_one_auth)
+#    CMD="onecluster"
+#    OPT="adddatastore ${CLST_ID} ${DS_ID}"
+#
+#    RES=$(${CMD} ${OPT} --user ${AUTH%:*} --password ${AUTH#*:})
+#    if [[ ${?} -ne 0 ]]
+#    then
+#        error "Attaching ${DS} to ${CLST} failed."
+#    else
+#        echo "Datastore ${DS} attached to ${CLST}."
+#        return 0
+#    fi
+#    return 0
+#}
 
 function create_datastore()
 {
     ds_type="${1}"
     ds_name="${2}"
-    ds_cluster="${3}"
+	# ref https://dev-eole.ac-dijon.fr/issues/16797
+    #ds_cluster="${3}"
 
     if [[ $(CreoleGet activer_multinode 2>&1) == 'oui' ]]
     then
@@ -297,12 +303,12 @@ __EOF__
 
     auth=$(get_one_auth)
     cmd="onedatastore"
-    #opt="create --user ${AUTH%:*} --password ${AUTH#*:} -c ${ds_cluster} ${TMPL_FILE}"
     opt="create --user ${AUTH%:*} --password ${AUTH#*:} ${TMPL_FILE}"
     RUN=$(${cmd} ${opt})
     if [[ ${?} -eq 0 ]]
     then
-        attach_ds_to_cluster ${ds_name} ${ds_cluster}
+		# ref https://dev-eole.ac-dijon.fr/issues/16797
+        #attach_ds_to_cluster ${ds_name} ${ds_cluster}
         rm ${TMPL_FILE}
         return 0
     else
@@ -385,10 +391,13 @@ __EOF__
 
 function manage_datastores()
 {
-    cluster=${1}
+	# ref https://dev-eole.ac-dijon.fr/issues/16797
+    #cluster=${1}
     AUTH=$(get_one_auth)
 
-    SYSTEM_DS="$(CreoleGet 'one_ds_system_prefix')${cluster}"
+	# ref https://dev-eole.ac-dijon.fr/issues/16797
+    #SYSTEM_DS="$(CreoleGet 'one_ds_system_prefix')${cluster}"
+    SYSTEM_DS="$(CreoleGet 'one_ds_system_prefix')default"
     ISO_DS=$(CreoleGet 'one_ds_iso_name')
     IMAGE_DS=$(CreoleGet 'one_ds_image_name')
 
@@ -396,7 +405,9 @@ function manage_datastores()
     sid=$(get_ds_id_by_name ${SYSTEM_DS})
     if [[ ${sid} = "ERR" ]]
     then
-      create_datastore "SYSTEM" "${SYSTEM_DS}" "${cluster}"
+	  # ref https://dev-eole.ac-dijon.fr/issues/16797
+      #create_datastore "SYSTEM" "${SYSTEM_DS}" "${cluster}"
+      create_datastore "SYSTEM" "${SYSTEM_DS}"
     else
       update_datastore ${AUTH} ${sid}
     fi
@@ -404,7 +415,9 @@ function manage_datastores()
     imgid=$(get_ds_id_by_name ${IMAGE_DS})
     if [[ ${imgid} = "ERR" ]]
     then
-      create_datastore "IMAGE" "${IMAGE_DS}" "${cluster}"
+	  # ref https://dev-eole.ac-dijon.fr/issues/16797
+      #create_datastore "IMAGE" "${IMAGE_DS}" "${cluster}"
+      create_datastore "IMAGE" "${IMAGE_DS}"
     else
       update_datastore ${AUTH} ${imgid}
     fi
@@ -412,7 +425,9 @@ function manage_datastores()
     isoid=$(get_ds_id_by_name ${ISO_DS})
     if [[ ${isoid} = "ERR" ]]
     then
-      create_datastore "ISO" "${ISO_DS}" "${cluster}"
+	  # ref https://dev-eole.ac-dijon.fr/issues/16797
+      #create_datastore "ISO" "${ISO_DS}" "${cluster}"
+      create_datastore "ISO" "${ISO_DS}"
     else
       update_datastore ${AUTH} ${isoid}
     fi
@@ -423,9 +438,9 @@ function main()
 {
     #
     # Creating Cluster
-    #
-    clst_name=$(CreoleGet one_cluster_name)
-    manage_cluster ${clst_name}
+    # ref https://dev-eole.ac-dijon.fr/issues/16797
+    #clst_name=$(CreoleGet one_cluster_name)
+    #manage_cluster ${clst_name}
 
     #
     # Creating Host
@@ -439,7 +454,7 @@ function main()
     #
     # Attaching Host to the Cluster
     #
-    attach_host ${host} ${clst_name}
+    attach_host ${host} "default"
 
     #
     # Création des Datastores
diff --git a/postservice/31-one-netmng b/postservice/31-one-netmng
index 4a2ef90..5092638 100755
--- a/postservice/31-one-netmng
+++ b/postservice/31-one-netmng
@@ -289,7 +289,9 @@ def main():
     client = CreoleClient()
     one_client = OneClient('oneadmin')
     networks = []
-    cluster = client.get_creole('one_cluster_name')
+    # ref https://dev-eole.ac-dijon.fr/issues/16797
+    # cluster = client.get_creole('one_cluster_name')
+    cluster = "default"
     swname = client.get_creole('ovs_sw_name')
     zones = client.get_creole('vnets')
     vlans = client.get_creole('vnet_vlan_tag')
diff --git a/scripts/onehost_create_all b/scripts/onehost_create_all
index 08801bc..0efa546 100755
--- a/scripts/onehost_create_all
+++ b/scripts/onehost_create_all
@@ -24,7 +24,9 @@ function copy_ssh_id()
 #
 function register_node()
 {
-    cmd="onehost create -i kvm -v kvm -n ovswitch -c \"$(CreoleGet one_cluster_name)\" ${1}"
+	# ref https://dev-eole.ac-dijon.fr/issues/16797
+    #cmd="onehost create -i kvm -v kvm -n ovswitch -c \"$(CreoleGet one_cluster_name)\" ${1}"
+    cmd="onehost create -i kvm -v kvm -n ovswitch -c \"default\" ${1}"
     ret=$(su - ${ONEUSER} -c -- "${cmd}")
     return $?
 }