Pull dstat logic into its own function so grenade can use it
In order to use dstat on the new side of grenade, pull dstat code into
its own lib with the function start_dstat
Change-Id: I5c908d594a6f3a90ed4b3f744002bf606841cf07
diff --git a/lib/dstat b/lib/dstat
new file mode 100644
index 0000000..a2c522c
--- /dev/null
+++ b/lib/dstat
@@ -0,0 +1,41 @@
+# lib/apache
+# Functions to start and stop dstat
+
+# Dependencies:
+#
+# - ``functions`` file
+
+# ``stack.sh`` calls the entry points in this order:
+#
+# - start_dstat
+# - stop_dstat
+
+# Save trace setting
+XTRACE=$(set +o | grep xtrace)
+set +o xtrace
+
+
+# Defaults
+# --------
+# for DSTAT logging
+DSTAT_FILE=${DSTAT_FILE:-"dstat.txt"}
+
+
+# start_dstat() - Start running processes, including screen
+function start_dstat {
+ # A better kind of sysstat, with the top process per time slice
+ DSTAT_OPTS="-tcmndrylp --top-cpu-adv"
+ if [[ -n ${SCREEN_LOGDIR} ]]; then
+ screen_it dstat "cd $TOP_DIR; dstat $DSTAT_OPTS | tee $SCREEN_LOGDIR/$DSTAT_FILE"
+ else
+ screen_it dstat "dstat $DSTAT_OPTS"
+ fi
+}
+
+# stop_dstat() stop dstat process
+function stop_dstat {
+ screen_stop dstat
+}
+
+# Restore xtrace
+$XTRACE