@@ -1370,7 +1370,7 @@ function run_process {

 # Helper to launch a process in a named screen

 # Uses globals ``CURRENT_LOG_TIME``, ```LOGDIR``, ``SCREEN_LOGDIR``, `SCREEN_NAME``,

-# ``SERVICE_DIR``, ``USE_SCREEN``

+# ``SERVICE_DIR``, ``USE_SCREEN``, ``SCREEN_IS_LOGGING``

 # screen_process name "command-line" [group]

 # Run a command in a shell in a screen window, if an optional group

 # is provided, use sg to set the group of the command.

@@ -1390,8 +1390,12 @@ function screen_process {

     echo "SCREEN_LOGDIR: $SCREEN_LOGDIR"

     echo "log: $real_logfile"

     if [[ -n ${LOGDIR} ]]; then

-        screen -S $SCREEN_NAME -p $name -X logfile "$real_logfile"

-        screen -S $SCREEN_NAME -p $name -X log on

+        if [[ "$SCREEN_IS_LOGGING" == "True" ]]; then

+            screen -S $SCREEN_NAME -p $name -X logfile "$real_logfile"

+            screen -S $SCREEN_NAME -p $name -X log on

+        fi

+        # If logging isn't active then avoid a broken symlink

+        touch "$real_logfile"

         ln -sf "$real_logfile" ${LOGDIR}/${name}.log

         if [[ -n ${SCREEN_LOGDIR} ]]; then

             # Drop the backward-compat symlink

@@ -1430,7 +1434,7 @@ function screen_process {

 }

 # Screen rc file builder

-# Uses globals ``SCREEN_NAME``, ``SCREENRC``

+# Uses globals ``SCREEN_NAME``, ``SCREENRC``, ``SCREEN_IS_LOGGING``

 # screen_rc service "command-line"

 function screen_rc {

     SCREEN_NAME=${SCREEN_NAME:-stack}

@@ -1450,7 +1454,7 @@ function screen_rc {

         echo "screen -t $1 bash" >> $SCREENRC

         echo "stuff \"$2$NL\"" >> $SCREENRC

-        if [[ -n ${LOGDIR} ]]; then

+        if [[ -n ${LOGDIR} ]] && [[ "$SCREEN_IS_LOGGING" == "True" ]]; then

             echo "logfile ${LOGDIR}/${1}.log.${CURRENT_LOG_TIME}" >>$SCREENRC

             echo "log on" >>$SCREENRC

         fi

@@ -103,6 +103,16 @@ HORIZON_APACHE_ROOT="/dashboard"

 # be disabled for automated testing by setting this value to False.

 USE_SCREEN=True

+# When using screen, should we keep a log file on disk?  You might

+# want this False if you have a long-running setup where verbose logs

+# can fill-up the host.

+# XXX: Ideally screen itself would be configured to log but just not

+# activate.  This isn't possible with the screerc syntax.  Temporary

+# logging can still be used by a developer with:

+#    C-a : logfile foo

+#    C-a : log on

+SCREEN_IS_LOGGING=$(trueorfalse True SCREEN_IS_LOGGING)

+

 # Passwords generated by interactive devstack runs

 if [[ -r $RC_DIR/.localrc.password ]]; then

     source $RC_DIR/.localrc.password