diff --git a/functions b/functions
index 34da1ba733..762fc472c2 100644
--- a/functions
+++ b/functions
@@ -22,7 +22,7 @@ source ${FUNC_DIR}/inc/python
 source ${FUNC_DIR}/inc/rootwrap
 
 # Save trace setting
-XTRACE=$(set +o | grep xtrace)
+_XTRACE_FUNCTIONS=$(set +o | grep xtrace)
 set +o xtrace
 
 # Check if a function already exists
@@ -603,7 +603,7 @@ function create_disk {
 }
 
 # Restore xtrace
-$XTRACE
+$_XTRACE_FUNCTIONS
 
 # Local variables:
 # mode: shell-script
diff --git a/functions-common b/functions-common
index 6a065ba83c..d68ae77971 100644
--- a/functions-common
+++ b/functions-common
@@ -32,7 +32,7 @@
 #
 
 # Save trace setting
-XTRACE=$(set +o | grep xtrace)
+_XTRACE_FUNCTIONS_COMMON=$(set +o | grep xtrace)
 set +o xtrace
 
 # ensure we don't re-source this in the same environment
@@ -2254,7 +2254,7 @@ function time_totals {
 }
 
 # Restore xtrace
-$XTRACE
+$_XTRACE_FUNCTIONS_COMMON
 
 # Local variables:
 # mode: shell-script
diff --git a/inc/meta-config b/inc/meta-config
index b9ab6b207f..b6fe437802 100644
--- a/inc/meta-config
+++ b/inc/meta-config
@@ -20,7 +20,7 @@
 # file-name is the destination of the config file
 
 # Save trace setting
-INC_META_XTRACE=$(set +o | grep xtrace)
+_XTRACE_INC_META=$(set +o | grep xtrace)
 set +o xtrace
 
 
@@ -197,7 +197,7 @@ function merge_config_group {
 
 
 # Restore xtrace
-$INC_META_XTRACE
+$_XTRACE_INC_META
 
 # Local variables:
 # mode: shell-script
diff --git a/lib/apache b/lib/apache
index 17526c74d0..c9e02a2b58 100644
--- a/lib/apache
+++ b/lib/apache
@@ -19,7 +19,7 @@
 # - restart_apache_server
 
 # Save trace setting
-XTRACE=$(set +o | grep xtrace)
+_XTRACE_LIB_APACHE=$(set +o | grep xtrace)
 set +o xtrace
 
 # Allow overriding the default Apache user and group, default to
@@ -191,7 +191,7 @@ function restart_apache_server {
 }
 
 # Restore xtrace
-$XTRACE
+$_XTRACE_LIB_APACHE
 
 # Tell emacs to use shell-script-mode
 ## Local variables:
diff --git a/lib/ceph b/lib/ceph
index f573136a4e..4ac498ab97 100644
--- a/lib/ceph
+++ b/lib/ceph
@@ -18,7 +18,7 @@
 # - cleanup_ceph
 
 # Save trace setting
-XTRACE=$(set +o | grep xtrace)
+_XTRACE_LIB_CEPH=$(set +o | grep xtrace)
 set +o xtrace
 
 
@@ -375,7 +375,7 @@ function stop_ceph {
 
 
 # Restore xtrace
-$XTRACE
+$_XTRACE_LIB_CEPH
 
 ## Local variables:
 ## mode: shell-script
diff --git a/lib/cinder b/lib/cinder
index 1307c11f7a..70b198c2e9 100644
--- a/lib/cinder
+++ b/lib/cinder
@@ -20,7 +20,7 @@
 # - cleanup_cinder
 
 # Save trace setting
-XTRACE=$(set +o | grep xtrace)
+_XTRACE_CINDER=$(set +o | grep xtrace)
 set +o xtrace
 
 
@@ -567,7 +567,7 @@ function create_cinder_volume_group {
 
 
 # Restore xtrace
-$XTRACE
+$_XTRACE_CINDER
 
 # Tell emacs to use shell-script-mode
 ## Local variables:
diff --git a/lib/cinder_backends/ceph b/lib/cinder_backends/ceph
index 7e9d2d334e..c21350ba01 100644
--- a/lib/cinder_backends/ceph
+++ b/lib/cinder_backends/ceph
@@ -22,7 +22,7 @@
 
 
 # Save trace setting
-MY_XTRACE=$(set +o | grep xtrace)
+_XTRACE_CINDER_CEPH=$(set +o | grep xtrace)
 set +o xtrace
 
 
@@ -76,7 +76,7 @@ function configure_cinder_backend_ceph {
 }
 
 # Restore xtrace
-$MY_XTRACE
+$_XTRACE_CINDER_CEPH
 
 # Local variables:
 # mode: shell-script
diff --git a/lib/cinder_backends/glusterfs b/lib/cinder_backends/glusterfs
index 00c62e04cd..4e34f8ef6c 100644
--- a/lib/cinder_backends/glusterfs
+++ b/lib/cinder_backends/glusterfs
@@ -19,7 +19,7 @@
 # configure_cinder_backend_glusterfs - Configure Cinder for GlusterFS backends
 
 # Save trace setting
-GLUSTERFS_XTRACE=$(set +o | grep xtrace)
+_XTRACE_CINDER_GLUSTERFS=$(set +o | grep xtrace)
 set +o xtrace
 
 
@@ -41,7 +41,7 @@ function configure_cinder_backend_glusterfs {
 
 
 # Restore xtrace
-$GLUSTERFS_XTRACE
+$_XTRACE_CINDER_GLUSTERFS
 
 # Local variables:
 # mode: shell-script
diff --git a/lib/cinder_backends/lvm b/lib/cinder_backends/lvm
index 411b82c190..d927f9cd6b 100644
--- a/lib/cinder_backends/lvm
+++ b/lib/cinder_backends/lvm
@@ -22,7 +22,7 @@
 
 
 # Save trace setting
-MY_XTRACE=$(set +o | grep xtrace)
+_XTRACE_CINDER_LVM=$(set +o | grep xtrace)
 set +o xtrace
 
 
@@ -68,7 +68,7 @@ function init_cinder_backend_lvm {
 }
 
 # Restore xtrace
-$MY_XTRACE
+$_XTRACE_CINDER_LVM
 
 # mode: shell-script
 # End:
diff --git a/lib/cinder_backends/netapp_iscsi b/lib/cinder_backends/netapp_iscsi
index be9442eb83..5cce30a6d3 100644
--- a/lib/cinder_backends/netapp_iscsi
+++ b/lib/cinder_backends/netapp_iscsi
@@ -20,7 +20,7 @@
 # configure_cinder_backend_netapp_iscsi - configure iSCSI
 
 # Save trace setting
-MY_XTRACE=$(set +o | grep xtrace)
+_XTRACE_CINDER_NETAPP=$(set +o | grep xtrace)
 set +o xtrace
 
 
@@ -59,7 +59,7 @@ function configure_cinder_backend_netapp_iscsi {
 
 
 # Restore xtrace
-$MY_XTRACE
+$_XTRACE_CINDER_NETAPP
 
 # Local variables:
 # mode: shell-script
diff --git a/lib/cinder_backends/netapp_nfs b/lib/cinder_backends/netapp_nfs
index dc919ad86b..7ba36d2a3b 100644
--- a/lib/cinder_backends/netapp_nfs
+++ b/lib/cinder_backends/netapp_nfs
@@ -20,7 +20,7 @@
 # configure_cinder_backend_netapp_nfs - configure NFS
 
 # Save trace setting
-MY_XTRACE=$(set +o | grep xtrace)
+_XTRACE_CINDER_NETAPP=$(set +o | grep xtrace)
 set +o xtrace
 
 
@@ -70,7 +70,7 @@ function cleanup_cinder_backend_netapp_nfs {
 
 
 # Restore xtrace
-$MY_XTRACE
+$_XTRACE_CINDER_NETAPP
 
 # Local variables:
 # mode: shell-script
diff --git a/lib/cinder_backends/nfs b/lib/cinder_backends/nfs
index fc51b2b440..89a37a1f02 100644
--- a/lib/cinder_backends/nfs
+++ b/lib/cinder_backends/nfs
@@ -19,7 +19,7 @@
 # configure_cinder_backend_nfs - Configure Cinder for NFS backends
 
 # Save trace setting
-NFS_XTRACE=$(set +o | grep xtrace)
+_XTRACE_CINDER_NFS=$(set +o | grep xtrace)
 set +o xtrace
 
 
@@ -38,7 +38,7 @@ function configure_cinder_backend_nfs {
 
 
 # Restore xtrace
-$NFS_XTRACE
+$_XTRACE_CINDER_NFS
 
 # Local variables:
 # mode: shell-script
diff --git a/lib/cinder_backends/solidfire b/lib/cinder_backends/solidfire
index 7cc70fc86d..16bc527863 100644
--- a/lib/cinder_backends/solidfire
+++ b/lib/cinder_backends/solidfire
@@ -17,7 +17,7 @@
 # configure_cinder_driver - make configuration changes, including those to other services
 
 # Save trace setting
-MY_XTRACE=$(set +o | grep xtrace)
+_XTRACE_CINDER_SOLIDFIRE=$(set +o | grep xtrace)
 set +o xtrace
 
 
@@ -42,7 +42,7 @@ function configure_cinder_backend_solidfire {
 
 
 # Restore xtrace
-$MY_XTRACE
+$_XTRACE_CINDER_SOLIDFIRE
 
 # Local variables:
 # mode: shell-script
diff --git a/lib/cinder_backends/vmdk b/lib/cinder_backends/vmdk
index d5b945354b..3a6a5cf2ff 100644
--- a/lib/cinder_backends/vmdk
+++ b/lib/cinder_backends/vmdk
@@ -15,7 +15,7 @@
 # configure_cinder_backend_vmdk - Configure Cinder for VMware vmdk backends
 
 # Save trace setting
-VMDK_XTRACE=$(set +o | grep xtrace)
+_XTRACE_CINDER_VMDK=$(set +o | grep xtrace)
 set +o xtrace
 
 
@@ -40,7 +40,7 @@ function configure_cinder_backend_vmdk {
 
 
 # Restore xtrace
-$VMDK_XTRACE
+$_XTRACE_CINDER_VMDK
 
 # Local variables:
 # mode: shell-script
diff --git a/lib/cinder_backends/xiv b/lib/cinder_backends/xiv
index 6eadaae93b..e8b5da05d5 100644
--- a/lib/cinder_backends/xiv
+++ b/lib/cinder_backends/xiv
@@ -42,7 +42,7 @@
 # configure_cinder_backend_xiv - Configure Cinder for xiv backends
 
 # Save trace setting
-XIV_XTRACE=$(set +o | grep xtrace)
+_XTRACE_CINDER_XIV=$(set +o | grep xtrace)
 set +o xtrace
 
 # Defaults
@@ -79,7 +79,7 @@ function configure_cinder_backend_xiv {
 }
 
 # Restore xtrace
-$XIV_XTRACE
+$_XTRACE_CINDER_XIV
 
 # Local variables:
 # mode: shell-script
diff --git a/lib/cinder_plugins/XenAPINFS b/lib/cinder_plugins/XenAPINFS
index f7306955cb..92135e7c4f 100644
--- a/lib/cinder_plugins/XenAPINFS
+++ b/lib/cinder_plugins/XenAPINFS
@@ -15,7 +15,7 @@
 # configure_cinder_driver - make configuration changes, including those to other services
 
 # Save trace setting
-MY_XTRACE=$(set +o | grep xtrace)
+_XTRACE_CINDER_XENAPINFS=$(set +o | grep xtrace)
 set +o xtrace
 
 
@@ -39,7 +39,7 @@ function configure_cinder_driver {
 }
 
 # Restore xtrace
-$MY_XTRACE
+$_XTRACE_CINDER_XENAPINFS
 
 # Local variables:
 # mode: shell-script
diff --git a/lib/cinder_plugins/glusterfs b/lib/cinder_plugins/glusterfs
index 35ceb27ce1..329dd6c649 100644
--- a/lib/cinder_plugins/glusterfs
+++ b/lib/cinder_plugins/glusterfs
@@ -15,7 +15,7 @@
 # configure_cinder_driver - make configuration changes, including those to other services
 
 # Save trace setting
-MY_XTRACE=$(set +o | grep xtrace)
+_XTRACE_CINDER_GLUSTERFS=$(set +o | grep xtrace)
 set +o xtrace
 
 
@@ -45,7 +45,7 @@ function configure_cinder_driver {
 }
 
 # Restore xtrace
-$MY_XTRACE
+$_XTRACE_CINDER_GLUSTERFS
 
 # Local variables:
 # mode: shell-script
diff --git a/lib/cinder_plugins/nfs b/lib/cinder_plugins/nfs
index 83b39932cf..6e4ffe068e 100644
--- a/lib/cinder_plugins/nfs
+++ b/lib/cinder_plugins/nfs
@@ -15,7 +15,7 @@
 # configure_cinder_driver - make configuration changes, including those to other services
 
 # Save trace setting
-MY_XTRACE=$(set +o | grep xtrace)
+_XTRACE_CINDER_NFS=$(set +o | grep xtrace)
 set +o xtrace
 
 
@@ -36,7 +36,7 @@ function configure_cinder_driver {
 }
 
 # Restore xtrace
-$MY_XTRACE
+$_XTRACE_CINDER_NFS
 
 # Local variables:
 # mode: shell-script
diff --git a/lib/cinder_plugins/sheepdog b/lib/cinder_plugins/sheepdog
index ca343f708b..558de46c6d 100644
--- a/lib/cinder_plugins/sheepdog
+++ b/lib/cinder_plugins/sheepdog
@@ -15,7 +15,7 @@
 # configure_cinder_driver - make configuration changes, including those to other services
 
 # Save trace setting
-MY_XTRACE=$(set +o | grep xtrace)
+_XTRACE_CINDER_SHEEPDOG=$(set +o | grep xtrace)
 set +o xtrace
 
 
@@ -34,7 +34,7 @@ function configure_cinder_driver {
 }
 
 # Restore xtrace
-$MY_XTRACE
+$_XTRACE_CINDER_SHEEPDOG
 
 # Local variables:
 # mode: shell-script
diff --git a/lib/cinder_plugins/vsphere b/lib/cinder_plugins/vsphere
index f14ddf0998..1b28ffe602 100644
--- a/lib/cinder_plugins/vsphere
+++ b/lib/cinder_plugins/vsphere
@@ -15,7 +15,7 @@
 # configure_cinder_driver - make configuration changes, including those to other services
 
 # Save trace setting
-MY_XTRACE=$(set +o | grep xtrace)
+_XTRACE_CINDER_VSPHERE=$(set +o | grep xtrace)
 set +o xtrace
 
 
@@ -37,7 +37,7 @@ function configure_cinder_driver {
 }
 
 # Restore xtrace
-$MY_XTRACE
+$_XTRACE_CINDER_VSPHERE
 
 # Local variables:
 # mode: shell-script
diff --git a/lib/database b/lib/database
index 13740b90e6..0d720527df 100644
--- a/lib/database
+++ b/lib/database
@@ -20,7 +20,7 @@
 # and call register_database $DATABASE_TYPE
 
 # Save trace setting
-XTRACE=$(set +o | grep xtrace)
+_XTRACE_LIB_DB=$(set +o | grep xtrace)
 set +o xtrace
 
 DATABASE_BACKENDS=""
@@ -137,7 +137,7 @@ function database_connection_url {
 
 
 # Restore xtrace
-$XTRACE
+$_XTRACE_LIB_DB
 
 # Tell emacs to use shell-script-mode
 ## Local variables:
diff --git a/lib/databases/mysql b/lib/databases/mysql
index cc74b33327..1bbbd62cc3 100644
--- a/lib/databases/mysql
+++ b/lib/databases/mysql
@@ -8,7 +8,7 @@
 # - DATABASE_{HOST,USER,PASSWORD} must be defined
 
 # Save trace setting
-MY_XTRACE=$(set +o | grep xtrace)
+_XTRACE_DB_MYSQL=$(set +o | grep xtrace)
 set +o xtrace
 
 MYSQL_DRIVER=${MYSQL_DRIVER:-PyMySQL}
@@ -178,7 +178,7 @@ function database_connection_url_mysql {
 
 
 # Restore xtrace
-$MY_XTRACE
+$_XTRACE_DB_MYSQL
 
 # Local variables:
 # mode: shell-script
diff --git a/lib/databases/postgresql b/lib/databases/postgresql
index 78c7bedc90..913e8ffacd 100644
--- a/lib/databases/postgresql
+++ b/lib/databases/postgresql
@@ -8,7 +8,7 @@
 # - DATABASE_{HOST,USER,PASSWORD} must be defined
 
 # Save trace setting
-PG_XTRACE=$(set +o | grep xtrace)
+_XTRACE_PG=$(set +o | grep xtrace)
 set +o xtrace
 
 
@@ -119,7 +119,7 @@ function database_connection_url_postgresql {
 
 
 # Restore xtrace
-$PG_XTRACE
+$_XTRACE_PG
 
 # Local variables:
 # mode: shell-script
diff --git a/lib/dlm b/lib/dlm
index 95e9b0ac3d..74eb67ee8f 100644
--- a/lib/dlm
+++ b/lib/dlm
@@ -19,7 +19,7 @@
 # - cleanup_dlm
 
 # Save trace setting
-XTRACE=$(set +o | grep xtrace)
+_XTRACE_DLM=$(set +o | grep xtrace)
 set +o xtrace
 
 
@@ -100,7 +100,7 @@ function install_dlm {
 }
 
 # Restore xtrace
-$XTRACE
+$_XTRACE_DLM
 
 # Tell emacs to use shell-script-mode
 ## Local variables:
diff --git a/lib/dstat b/lib/dstat
index fe4790b12d..b705948094 100644
--- a/lib/dstat
+++ b/lib/dstat
@@ -13,7 +13,7 @@
 # - stop_dstat
 
 # Save trace setting
-XTRACE=$(set +o | grep xtrace)
+_XTRACE_DSTAT=$(set +o | grep xtrace)
 set +o xtrace
 
 # start_dstat() - Start running processes, including screen
@@ -34,4 +34,4 @@ function stop_dstat {
 }
 
 # Restore xtrace
-$XTRACE
+$_XTRACE_DSTAT
diff --git a/lib/glance b/lib/glance
index 2eb93a46e6..eb5832e910 100644
--- a/lib/glance
+++ b/lib/glance
@@ -21,7 +21,7 @@
 # - cleanup_glance
 
 # Save trace setting
-XTRACE=$(set +o | grep xtrace)
+_XTRACE_GLANCE=$(set +o | grep xtrace)
 set +o xtrace
 
 
@@ -403,7 +403,7 @@ function stop_glance {
 }
 
 # Restore xtrace
-$XTRACE
+$_XTRACE_GLANCE
 
 # Tell emacs to use shell-script-mode
 ## Local variables:
diff --git a/lib/heat b/lib/heat
index e42bdf0b9e..54666a5212 100644
--- a/lib/heat
+++ b/lib/heat
@@ -23,7 +23,7 @@
 # - cleanup_heat
 
 # Save trace setting
-XTRACE=$(set +o | grep xtrace)
+_XTRACE_HEAT=$(set +o | grep xtrace)
 set +o xtrace
 
 
@@ -464,7 +464,7 @@ function build_heat_pip_mirror {
 }
 
 # Restore xtrace
-$XTRACE
+$_XTRACE_HEAT
 
 # Tell emacs to use shell-script-mode
 ## Local variables:
diff --git a/lib/horizon b/lib/horizon
index ff63b06ab2..67181fcf29 100644
--- a/lib/horizon
+++ b/lib/horizon
@@ -19,7 +19,7 @@
 # - cleanup_horizon
 
 # Save trace setting
-XTRACE=$(set +o | grep xtrace)
+_XTRACE_HORIZON=$(set +o | grep xtrace)
 set +o xtrace
 
 
@@ -193,7 +193,7 @@ function _prepare_message_catalog_compilation {
 
 
 # Restore xtrace
-$XTRACE
+$_XTRACE_HORIZON
 
 # Tell emacs to use shell-script-mode
 ## Local variables:
diff --git a/lib/infra b/lib/infra
index ab32efecd9..cf003cce01 100644
--- a/lib/infra
+++ b/lib/infra
@@ -15,7 +15,7 @@
 # - install_infra
 
 # Save trace setting
-XTRACE=$(set +o | grep xtrace)
+_XTRACE_INFRA=$(set +o | grep xtrace)
 set +o xtrace
 
 
@@ -50,7 +50,7 @@ function install_infra {
 }
 
 # Restore xtrace
-$XTRACE
+$_XTRACE_INFRA
 
 # Tell emacs to use shell-script-mode
 ## Local variables:
diff --git a/lib/ironic b/lib/ironic
index 6a32983b24..23d8dda3ff 100644
--- a/lib/ironic
+++ b/lib/ironic
@@ -21,8 +21,8 @@
 # - cleanup_ironic
 
 # Save trace and pipefail settings
-XTRACE=$(set +o | grep xtrace)
-PIPEFAIL=$(set +o | grep pipefail)
+_XTRACE_IRONIC=$(set +o | grep xtrace)
+_PIPEFAIL_IRONIC=$(set +o | grep pipefail)
 set +o xtrace
 set +o pipefail
 
@@ -855,8 +855,8 @@ function cleanup_baremetal_basic_ops {
 }
 
 # Restore xtrace + pipefail
-$XTRACE
-$PIPEFAIL
+$_XTRACE_IRONIC
+$_PIPEFAIL_IRONIC
 
 # Tell emacs to use shell-script-mode
 ## Local variables:
diff --git a/lib/keystone b/lib/keystone
index 5a2afbfe02..b19202b0f7 100644
--- a/lib/keystone
+++ b/lib/keystone
@@ -28,7 +28,7 @@
 # - _cleanup_keystone_apache_wsgi
 
 # Save trace setting
-XTRACE=$(set +o | grep xtrace)
+_XTRACE_KEYSTONE=$(set +o | grep xtrace)
 set +o xtrace
 
 # Defaults
@@ -592,7 +592,7 @@ function stop_keystone {
 
 
 # Restore xtrace
-$XTRACE
+$_XTRACE_KEYSTONE
 
 # Tell emacs to use shell-script-mode
 ## Local variables:
diff --git a/lib/ldap b/lib/ldap
index 0414fea639..65056aea2f 100644
--- a/lib/ldap
+++ b/lib/ldap
@@ -8,7 +8,7 @@
 # - install_ldap()
 
 # Save trace setting
-XTRACE=$(set +o | grep xtrace)
+_XTRACE_LDAP=$(set +o | grep xtrace)
 set +o xtrace
 
 
@@ -166,7 +166,7 @@ function clear_ldap_state {
 }
 
 # Restore xtrace
-$XTRACE
+$_XTRACE_LDAP
 
 # Tell emacs to use shell-script-mode
 ## Local variables:
diff --git a/lib/lvm b/lib/lvm
index 468a99aecc..ae6023a836 100644
--- a/lib/lvm
+++ b/lib/lvm
@@ -16,7 +16,7 @@
 
 
 # Save trace setting
-MY_XTRACE=$(set +o | grep xtrace)
+_XTRACE_LVM=$(set +o | grep xtrace)
 set +o xtrace
 
 
@@ -182,7 +182,7 @@ function set_lvm_filter {
 }
 
 # Restore xtrace
-$MY_XTRACE
+$_XTRACE_LVM
 
 # mode: shell-script
 # End:
diff --git a/lib/neutron-legacy b/lib/neutron-legacy
index 978943dae2..d00630af70 100644
--- a/lib/neutron-legacy
+++ b/lib/neutron-legacy
@@ -357,7 +357,7 @@ else
 fi
 
 # Save trace setting
-XTRACE=$(set +o | grep xtrace)
+_XTRACE_NEUTRON=$(set +o | grep xtrace)
 set +o xtrace
 
 
@@ -1492,7 +1492,7 @@ function is_provider_network {
 
 
 # Restore xtrace
-$XTRACE
+$_XTRACE_NEUTRON
 
 # Tell emacs to use shell-script-mode
 ## Local variables:
diff --git a/lib/neutron_plugins/bigswitch_floodlight b/lib/neutron_plugins/bigswitch_floodlight
index f52105e658..586ded79b4 100644
--- a/lib/neutron_plugins/bigswitch_floodlight
+++ b/lib/neutron_plugins/bigswitch_floodlight
@@ -4,7 +4,7 @@
 # ------------------------------------
 
 # Save trace setting
-BS_XTRACE=$(set +o | grep xtrace)
+_XTRACE_NEUTRON_BIGSWITCH=$(set +o | grep xtrace)
 set +o xtrace
 
 source $TOP_DIR/lib/neutron_plugins/ovs_base
@@ -75,4 +75,4 @@ function neutron_plugin_check_adv_test_requirements {
 }
 
 # Restore xtrace
-$BS_XTRACE
+$_XTRACE_NEUTRON_BIGSWITCH
diff --git a/lib/neutron_plugins/brocade b/lib/neutron_plugins/brocade
index 953360e070..6ba0a66c3f 100644
--- a/lib/neutron_plugins/brocade
+++ b/lib/neutron_plugins/brocade
@@ -4,7 +4,7 @@
 # ----------------------
 
 # Save trace setting
-BRCD_XTRACE=$(set +o | grep xtrace)
+_XTRACE_NEUTRON_BROCADE=$(set +o | grep xtrace)
 set +o xtrace
 
 function is_neutron_ovs_base_plugin {
@@ -81,4 +81,4 @@ function neutron_plugin_check_adv_test_requirements {
 }
 
 # Restore xtrace
-$BRCD_XTRACE
+$_XTRACE_NEUTRON_BROCADE
diff --git a/lib/neutron_plugins/cisco b/lib/neutron_plugins/cisco
index 7d0cf1af39..fc2cb8ad17 100644
--- a/lib/neutron_plugins/cisco
+++ b/lib/neutron_plugins/cisco
@@ -4,7 +4,7 @@
 # ---------------------------
 
 # Save trace setting
-CISCO_XTRACE=$(set +o | grep xtrace)
+_XTRACE_NEUTRON_CISCO=$(set +o | grep xtrace)
 set +o xtrace
 
 # Scecify the VSM parameters
@@ -154,4 +154,4 @@ function neutron_plugin_setup_interface_driver {
 }
 
 # Restore xtrace
-$CISCO_XTRACE
+$_XTRACE_NEUTRON_CISCO
diff --git a/lib/neutron_plugins/embrane b/lib/neutron_plugins/embrane
index 2028496ca1..385dab8354 100644
--- a/lib/neutron_plugins/embrane
+++ b/lib/neutron_plugins/embrane
@@ -4,7 +4,7 @@
 # ---------------------------
 
 # Save trace setting
-EMBR_XTRACE=$(set +o | grep xtrace)
+_XTRACE_NEUTRON_EMBR=$(set +o | grep xtrace)
 set +o xtrace
 
 source $TOP_DIR/lib/neutron_plugins/openvswitch
@@ -39,4 +39,5 @@ function neutron_plugin_configure_service {
 }
 
 # Restore xtrace
-$EMBR_XTRACE
+$_XTRACE_NEUTRON_EMBR
+
diff --git a/lib/neutron_plugins/linuxbridge_agent b/lib/neutron_plugins/linuxbridge_agent
index f28bcfeadd..096722b096 100644
--- a/lib/neutron_plugins/linuxbridge_agent
+++ b/lib/neutron_plugins/linuxbridge_agent
@@ -4,7 +4,7 @@
 # -----------------------------
 
 # Save trace setting
-PLUGIN_XTRACE=$(set +o | grep xtrace)
+_XTRACE_NEUTRON_LB=$(set +o | grep xtrace)
 set +o xtrace
 
 function neutron_lb_cleanup {
@@ -93,4 +93,4 @@ function neutron_plugin_check_adv_test_requirements {
 }
 
 # Restore xtrace
-$PLUGIN_XTRACE
+$_XTRACE_NEUTRON_LB
diff --git a/lib/neutron_plugins/ml2 b/lib/neutron_plugins/ml2
index ace5335a78..30e1b036f3 100644
--- a/lib/neutron_plugins/ml2
+++ b/lib/neutron_plugins/ml2
@@ -4,7 +4,7 @@
 # ------------------------------
 
 # Save trace setting
-ML2_XTRACE=$(set +o | grep xtrace)
+_XTRACE_NEUTRON_ML2=$(set +o | grep xtrace)
 set +o xtrace
 
 # Enable this to simply and quickly enable tunneling with ML2.
@@ -137,4 +137,4 @@ function has_neutron_plugin_security_group {
 }
 
 # Restore xtrace
-$ML2_XTRACE
+$_XTRACE_NEUTRON_ML2
diff --git a/lib/neutron_plugins/nuage b/lib/neutron_plugins/nuage
index 9e5307ba53..61e634e453 100644
--- a/lib/neutron_plugins/nuage
+++ b/lib/neutron_plugins/nuage
@@ -4,7 +4,7 @@
 # ----------------------
 
 # Save trace setting
-NU_XTRACE=$(set +o | grep xtrace)
+_XTRACE_NEUTRON_NU=$(set +o | grep xtrace)
 set +o xtrace
 
 function neutron_plugin_create_nova_conf {
@@ -66,4 +66,4 @@ function has_neutron_plugin_security_group {
 }
 
 # Restore xtrace
-$NU_XTRACE
+$_XTRACE_NEUTRON_NU
diff --git a/lib/neutron_plugins/openvswitch b/lib/neutron_plugins/openvswitch
index 891ab4982b..130eaacab3 100644
--- a/lib/neutron_plugins/openvswitch
+++ b/lib/neutron_plugins/openvswitch
@@ -7,7 +7,7 @@
 # which has been removed in Juno.
 
 # Save trace setting
-OVS_XTRACE=$(set +o | grep xtrace)
+_XTRACE_NEUTRON_OVS=$(set +o | grep xtrace)
 set +o xtrace
 
 source $TOP_DIR/lib/neutron_plugins/openvswitch_agent
@@ -56,4 +56,5 @@ function has_neutron_plugin_security_group {
 }
 
 # Restore xtrace
-$OVS_XTRACE
+$_XTRACE_NEUTRON_OVS
+
diff --git a/lib/neutron_plugins/openvswitch_agent b/lib/neutron_plugins/openvswitch_agent
index 6a333939d0..b1acacd4f3 100644
--- a/lib/neutron_plugins/openvswitch_agent
+++ b/lib/neutron_plugins/openvswitch_agent
@@ -4,7 +4,7 @@
 # -----------------------------
 
 # Save trace setting
-OVSA_XTRACE=$(set +o | grep xtrace)
+_XTRACE_NEUTRON_OVSL2=$(set +o | grep xtrace)
 set +o xtrace
 
 source $TOP_DIR/lib/neutron_plugins/ovs_base
@@ -132,4 +132,4 @@ function neutron_plugin_check_adv_test_requirements {
 }
 
 # Restore xtrace
-$OVSA_XTRACE
+$_XTRACE_NEUTRON_OVSL2
diff --git a/lib/neutron_plugins/ovs_base b/lib/neutron_plugins/ovs_base
index d3fd198b08..91aff336fe 100644
--- a/lib/neutron_plugins/ovs_base
+++ b/lib/neutron_plugins/ovs_base
@@ -4,7 +4,7 @@
 # -------------------------------------
 
 # Save trace setting
-OVSB_XTRACE=$(set +o | grep xtrace)
+_XTRACE_NEUTRON_OVS_BASE=$(set +o | grep xtrace)
 set +o xtrace
 
 OVS_BRIDGE=${OVS_BRIDGE:-br-int}
@@ -114,4 +114,4 @@ function _neutron_ovs_base_configure_nova_vif_driver {
 }
 
 # Restore xtrace
-$OVSB_XTRACE
+$_XTRACE_NEUTRON_OVS_BASE
diff --git a/lib/neutron_plugins/services/firewall b/lib/neutron_plugins/services/firewall
index 3496da82f8..1d81a21825 100644
--- a/lib/neutron_plugins/services/firewall
+++ b/lib/neutron_plugins/services/firewall
@@ -4,7 +4,7 @@
 # ---------------------------
 
 # Save trace setting
-FW_XTRACE=$(set +o | grep xtrace)
+_XTRACE_NEUTRON_FIREWALL=$(set +o | grep xtrace)
 set +o xtrace
 
 FWAAS_PLUGIN=neutron_fwaas.services.firewall.fwaas_plugin.FirewallPlugin
@@ -26,4 +26,4 @@ function neutron_fwaas_stop {
 }
 
 # Restore xtrace
-$FW_XTRACE
+$_XTRACE_NEUTRON_FIREWALL
diff --git a/lib/neutron_plugins/services/loadbalancer b/lib/neutron_plugins/services/loadbalancer
index 7865f6fd6e..b07d06c32b 100644
--- a/lib/neutron_plugins/services/loadbalancer
+++ b/lib/neutron_plugins/services/loadbalancer
@@ -4,7 +4,7 @@
 # ---------------------------
 
 # Save trace setting
-LB_XTRACE=$(set +o | grep xtrace)
+_XTRACE_NEUTRON_LB=$(set +o | grep xtrace)
 set +o xtrace
 
 
@@ -48,4 +48,4 @@ function neutron_lbaas_stop {
 }
 
 # Restore xtrace
-$LB_XTRACE
+$_XTRACE_NEUTRON_LB
diff --git a/lib/neutron_plugins/services/metering b/lib/neutron_plugins/services/metering
index c75ab19d4e..5fd2fdce44 100644
--- a/lib/neutron_plugins/services/metering
+++ b/lib/neutron_plugins/services/metering
@@ -4,7 +4,7 @@
 # ---------------------------
 
 # Save trace setting
-METER_XTRACE=$(set +o | grep xtrace)
+_XTRACE_NETURON_METER=$(set +o | grep xtrace)
 set +o xtrace
 
 
@@ -29,4 +29,5 @@ function neutron_metering_stop {
 }
 
 # Restore xtrace
-$METER_XTRACE
+$_XTRACE_NETURON_METER
+
diff --git a/lib/neutron_plugins/services/vpn b/lib/neutron_plugins/services/vpn
index c0e7457413..8a379f588c 100644
--- a/lib/neutron_plugins/services/vpn
+++ b/lib/neutron_plugins/services/vpn
@@ -4,7 +4,7 @@
 # ---------------------------
 
 # Save trace setting
-VPN_XTRACE=$(set +o | grep xtrace)
+_XTRACE_NEUTRON_VPN=$(set +o | grep xtrace)
 set +o xtrace
 
 
@@ -53,4 +53,4 @@ function neutron_vpn_stop {
 }
 
 # Restore xtrace
-$VPN_XTRACE
+$_XTRACE_NEUTRON_VPN
diff --git a/lib/neutron_thirdparty/bigswitch_floodlight b/lib/neutron_thirdparty/bigswitch_floodlight
index e3f4689fd7..45a4f2e263 100644
--- a/lib/neutron_thirdparty/bigswitch_floodlight
+++ b/lib/neutron_thirdparty/bigswitch_floodlight
@@ -4,7 +4,7 @@
 # ------------------------------------------
 
 # Save trace setting
-BS3_XTRACE=$(set +o | grep xtrace)
+_XTRACE_NEUTRON_BIGSWITCH=$(set +o | grep xtrace)
 set +o xtrace
 
 BS_FL_CONTROLLERS_PORT=${BS_FL_CONTROLLERS_PORT:-localhost:80}
@@ -51,4 +51,4 @@ function check_bigswitch_floodlight {
 }
 
 # Restore xtrace
-$BS3_XTRACE
+$_XTRACE_NEUTRON_BIGSWITCH
diff --git a/lib/nova b/lib/nova
index ba05f53b87..e5712939fe 100644
--- a/lib/nova
+++ b/lib/nova
@@ -25,7 +25,7 @@
 # - cleanup_nova
 
 # Save trace setting
-XTRACE=$(set +o | grep xtrace)
+_XTRACE_LIB_NOVA=$(set +o | grep xtrace)
 set +o xtrace
 
 
@@ -958,7 +958,7 @@ function stop_nova {
 
 
 # Restore xtrace
-$XTRACE
+$_XTRACE_LIB_NOVA
 
 # Tell emacs to use shell-script-mode
 ## Local variables:
diff --git a/lib/nova_plugins/functions-libvirt b/lib/nova_plugins/functions-libvirt
index 045fc8b919..dae55c6eba 100644
--- a/lib/nova_plugins/functions-libvirt
+++ b/lib/nova_plugins/functions-libvirt
@@ -8,7 +8,7 @@
 # ``STACK_USER`` has to be defined
 
 # Save trace setting
-LV_XTRACE=$(set +o | grep xtrace)
+_XTRACE_NOVA_FN_LIBVIRT=$(set +o | grep xtrace)
 set +o xtrace
 
 # Defaults
@@ -134,7 +134,7 @@ EOF
 
 
 # Restore xtrace
-$LV_XTRACE
+$_XTRACE_NOVA_FN_LIBVIRT
 
 # Local variables:
 # mode: shell-script
diff --git a/lib/nova_plugins/hypervisor-fake b/lib/nova_plugins/hypervisor-fake
index 3180d91f0a..2434dce884 100644
--- a/lib/nova_plugins/hypervisor-fake
+++ b/lib/nova_plugins/hypervisor-fake
@@ -17,7 +17,7 @@
 # cleanup_nova_hypervisor - remove transient data and cache
 
 # Save trace setting
-MY_XTRACE=$(set +o | grep xtrace)
+_XTRACE_VIRTFAKE=$(set +o | grep xtrace)
 set +o xtrace
 
 
@@ -72,7 +72,7 @@ function stop_nova_hypervisor {
 
 
 # Restore xtrace
-$MY_XTRACE
+$_XTRACE_VIRTFAKE
 
 # Local variables:
 # mode: shell-script
diff --git a/lib/nova_plugins/hypervisor-ironic b/lib/nova_plugins/hypervisor-ironic
index b9e286d5b6..c6ed85d63e 100644
--- a/lib/nova_plugins/hypervisor-ironic
+++ b/lib/nova_plugins/hypervisor-ironic
@@ -17,7 +17,7 @@
 # cleanup_nova_hypervisor - remove transient data and cache
 
 # Save trace setting
-MY_XTRACE=$(set +o | grep xtrace)
+_XTRACE_HYP_IRONIC=$(set +o | grep xtrace)
 set +o xtrace
 
 source $TOP_DIR/lib/nova_plugins/functions-libvirt
@@ -81,7 +81,7 @@ function stop_nova_hypervisor {
 
 
 # Restore xtrace
-$MY_XTRACE
+$_XTRACE_HYP_IRONIC
 
 # Local variables:
 # mode: shell-script
diff --git a/lib/nova_plugins/hypervisor-libvirt b/lib/nova_plugins/hypervisor-libvirt
index c54a7166a0..8bbaa2133d 100644
--- a/lib/nova_plugins/hypervisor-libvirt
+++ b/lib/nova_plugins/hypervisor-libvirt
@@ -17,7 +17,7 @@
 # cleanup_nova_hypervisor - remove transient data and cache
 
 # Save trace setting
-MY_XTRACE=$(set +o | grep xtrace)
+_XTRACE_NOVA_LIBVIRT=$(set +o | grep xtrace)
 set +o xtrace
 
 source $TOP_DIR/lib/nova_plugins/functions-libvirt
@@ -105,7 +105,7 @@ function stop_nova_hypervisor {
 
 
 # Restore xtrace
-$MY_XTRACE
+$_XTRACE_NOVA_LIBVIRT
 
 # Local variables:
 # mode: shell-script
diff --git a/lib/nova_plugins/hypervisor-openvz b/lib/nova_plugins/hypervisor-openvz
index cce36b8d3f..58ab5c11ac 100644
--- a/lib/nova_plugins/hypervisor-openvz
+++ b/lib/nova_plugins/hypervisor-openvz
@@ -17,7 +17,7 @@
 # cleanup_nova_hypervisor - remove transient data and cache
 
 # Save trace setting
-MY_XTRACE=$(set +o | grep xtrace)
+_XTRACE_OPENVZ=$(set +o | grep xtrace)
 set +o xtrace
 
 
@@ -62,7 +62,7 @@ function stop_nova_hypervisor {
 
 
 # Restore xtrace
-$MY_XTRACE
+$_XTRACE_OPENVZ
 
 # Local variables:
 # mode: shell-script
diff --git a/lib/nova_plugins/hypervisor-vsphere b/lib/nova_plugins/hypervisor-vsphere
index 698f836bad..7c08bc945b 100644
--- a/lib/nova_plugins/hypervisor-vsphere
+++ b/lib/nova_plugins/hypervisor-vsphere
@@ -17,7 +17,7 @@
 # cleanup_nova_hypervisor - remove transient data and cache
 
 # Save trace setting
-MY_XTRACE=$(set +o | grep xtrace)
+_XTRACE_NOVA_VSPHERE=$(set +o | grep xtrace)
 set +o xtrace
 
 
@@ -64,7 +64,7 @@ function stop_nova_hypervisor {
 
 
 # Restore xtrace
-$MY_XTRACE
+$_XTRACE_NOVA_VSPHERE
 
 # Local variables:
 # mode: shell-script
diff --git a/lib/nova_plugins/hypervisor-xenserver b/lib/nova_plugins/hypervisor-xenserver
index e097990bd3..3eb9149bb4 100644
--- a/lib/nova_plugins/hypervisor-xenserver
+++ b/lib/nova_plugins/hypervisor-xenserver
@@ -17,7 +17,7 @@
 # cleanup_nova_hypervisor - remove transient data and cache
 
 # Save trace setting
-MY_XTRACE=$(set +o | grep xtrace)
+_XTRACE_XENSERVER=$(set +o | grep xtrace)
 set +o xtrace
 
 
@@ -111,7 +111,7 @@ function stop_nova_hypervisor {
 
 
 # Restore xtrace
-$MY_XTRACE
+$_XTRACE_XENSERVER
 
 # Local variables:
 # mode: shell-script
diff --git a/lib/oslo b/lib/oslo
index 56615faaa3..3d6fbb38c6 100644
--- a/lib/oslo
+++ b/lib/oslo
@@ -16,7 +16,7 @@
 # - install_oslo
 
 # Save trace setting
-XTRACE=$(set +o | grep xtrace)
+_XTRACE_LIB_OSLO=$(set +o | grep xtrace)
 set +o xtrace
 
 
@@ -95,7 +95,7 @@ function install_oslo {
 }
 
 # Restore xtrace
-$XTRACE
+$_XTRACE_LIB_OSLO
 
 # Tell emacs to use shell-script-mode
 ## Local variables:
diff --git a/lib/rpc_backend b/lib/rpc_backend
index 298dcb6e5f..3864adec32 100644
--- a/lib/rpc_backend
+++ b/lib/rpc_backend
@@ -21,7 +21,7 @@
 # of this file which is a standard interface.
 
 # Save trace setting
-XTRACE=$(set +o | grep xtrace)
+_XTRACE_RPC_BACKEND=$(set +o | grep xtrace)
 set +o xtrace
 
 # Functions
@@ -141,7 +141,7 @@ function rabbit_setuser {
 }
 
 # Restore xtrace
-$XTRACE
+$_XTRACE_RPC_BACKEND
 
 # Tell emacs to use shell-script-mode
 ## Local variables:
diff --git a/lib/swift b/lib/swift
index d7ccc24111..b596142ad2 100644
--- a/lib/swift
+++ b/lib/swift
@@ -24,7 +24,7 @@
 # - _cleanup_swift_apache_wsgi
 
 # Save trace setting
-XTRACE=$(set +o | grep xtrace)
+_XTRACE_LIB_SWIFT=$(set +o | grep xtrace)
 set +o xtrace
 
 
@@ -823,7 +823,7 @@ function swift_configure_tempurls {
 }
 
 # Restore xtrace
-$XTRACE
+$_XTRACE_LIB_SWIFT
 
 # Tell emacs to use shell-script-mode
 ## Local variables:
diff --git a/lib/tempest b/lib/tempest
index 76fd6cac74..85e0e7fa35 100644
--- a/lib/tempest
+++ b/lib/tempest
@@ -38,7 +38,7 @@
 # - init_tempest
 
 # Save trace setting
-XTRACE=$(set +o | grep xtrace)
+_XTRACE_TEMPEST=$(set +o | grep xtrace)
 set +o xtrace
 
 
@@ -649,7 +649,7 @@ function init_tempest {
 }
 
 # Restore xtrace
-$XTRACE
+$_XTRACE_TEMPEST
 
 # Tell emacs to use shell-script-mode
 ## Local variables:
diff --git a/lib/template b/lib/template
index 2703788af4..08d10bbf71 100644
--- a/lib/template
+++ b/lib/template
@@ -21,7 +21,7 @@
 # - cleanup_XXXX
 
 # Save trace setting
-XTRACE=$(set +o | grep xtrace)
+_XTRACE_TEMPLATE=$(set +o | grep xtrace)
 set +o xtrace
 
 
@@ -92,7 +92,7 @@ function stop_XXXX {
 }
 
 # Restore xtrace
-$XTRACE
+$_XTRACE_TEMPLATE
 
 # Tell emacs to use shell-script-mode
 ## Local variables:
diff --git a/stack.sh b/stack.sh
index 8625b5aaeb..19d05c904a 100755
--- a/stack.sh
+++ b/stack.sh
@@ -573,7 +573,8 @@ run_phase source
 
 # Generic helper to configure passwords
 function read_password {
-    XTRACE=$(set +o | grep xtrace)
+    local xtrace
+    xtrace=$(set +o | grep xtrace)
     set +o xtrace
     var=$1; msg=$2
     pw=${!var}
@@ -616,7 +617,9 @@ function read_password {
         eval "$var=$pw"
         echo "$var=$pw" >> $localrc
     fi
-    $XTRACE
+
+    # restore previous xtrace value
+    $xtrace
 }