Adding sysstat monitoring

You can add sysstat logging on the devstack run.
In CI environemnt, sometimes VM creation, Volume creation or
Python unit testing timeouts. It is valuable to monitor
sysstat for investigate the issues.

- How to enable sysstat ( Default is off )
enable_service sysstat

- This commit adds two env variables.
SYSSTAT_FILE : sysstat log file
SYSSTAT_DURATION : duration of sysstat monitoring

Change-Id: I65efb574ef141e6e78c69218f4327df59b3258e2

files/apts/sysstat

@@ -0,0 +1 @@
+sysstat

files/rpms-suse/sysstat

@@ -0,0 +1 @@
+sysstat

files/rpms/sysstat

@@ -0,0 +1 @@
+sysstat

stack.sh

@@ -268,6 +268,11 @@ SYSLOG=`trueorfalse False $SYSLOG`
 SYSLOG_HOST=${SYSLOG_HOST:-$HOST_IP}
 SYSLOG_PORT=${SYSLOG_PORT:-516}
 
+# Enable sysstat logging
+SYSSTAT_FILE=${SYSSTAT_FILE:-"sysstat.dat"}
+SYSSTAT_INTERVAL=${SYSSTAT_INTERVAL:-"1"}
+
+
 # Use color for logging output (only available if syslog is not used)
 LOG_COLOR=`trueorfalse True $LOG_COLOR`
 
@@ -1274,6 +1279,15 @@ if is_service_enabled nova && is_baremetal; then
     screen_it baremetal "nova-baremetal-deploy-helper"
 fi
 
+# run sysstat if it is enabled
+if is_service_enabled sysstat;then
+    if [[ -n ${SCREEN_LOGDIR} ]]; then
+        screen_it sysstat "sar -o $SCREEN_LOGDIR/$SYSSTAT_FILE $SYSSTAT_INTERVAL"
+    else
+        screen_it sysstat "sar $SYSSTAT_INTERVAL"
+    fi
+fi
+
 # Save some values we generated for later use
 CURRENT_RUN_TIME=$(date "+$TIMESTAMP_FORMAT")
 echo "# $CURRENT_RUN_TIME" >$TOP_DIR/.stackenv