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authorFederico Ceratto <federico.ceratto@gmail.com>2016-03-30 21:40:42 +0000
committerFederico Ceratto <federico.ceratto@gmail.com>2016-03-30 21:40:42 +0000
commit9ce153ce7167c11adba8ac225edc7a707e97c6eb (patch)
tree9f6e849cce2dcc7e5b4e9e6252c843dc2d0787a2 /charts.d/example.chart.sh
downloadnetdata-9ce153ce7167c11adba8ac225edc7a707e97c6eb.tar.xz
netdata-9ce153ce7167c11adba8ac225edc7a707e97c6eb.zip
Imported Upstream version 1.0.0upstream/1.0.0
Diffstat (limited to 'charts.d/example.chart.sh')
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diff --git a/charts.d/example.chart.sh b/charts.d/example.chart.sh
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+#!/bin/sh
+
+# if this chart is called X.chart.sh, then all functions and global variables
+# must start with X_
+
+# _update_every is a special variable - it holds the number of seconds
+# between the calls of the _update() function
+example_update_every=
+
+example_priority=150000
+
+# _check is called once, to find out if this chart should be enabled or not
+example_check() {
+ # this should return:
+ # - 0 to enable the chart
+ # - 1 to disable the chart
+
+ return 0
+}
+
+# _create is called once, to create the charts
+example_create() {
+ # create the chart with 3 dimensions
+ cat <<EOF
+CHART example.random '' "Random Numbers Stacked Chart" "% of random numbers" random random stacked $[example_priority] $example_update_every
+DIMENSION random1 '' percentage-of-absolute-row 1 1
+DIMENSION random2 '' percentage-of-absolute-row 1 1
+DIMENSION random3 '' percentage-of-absolute-row 1 1
+CHART example.random2 '' "A random number" "random number" random random area $[example_priority + 1] $example_update_every
+DIMENSION random '' absolute 1 1
+EOF
+
+ return 0
+}
+
+# _update is called continiously, to collect the values
+example_last=0
+example_count=0
+example_update() {
+ local value1 value2 value3 value4 mode
+
+ # the first argument to this function is the microseconds since last update
+ # pass this parameter to the BEGIN statement (see bellow).
+
+ # do all the work to collect / calculate the values
+ # for each dimension
+ # remember: KEEP IT SIMPLE AND SHORT
+
+ value1=$RANDOM
+ value2=$RANDOM
+ value3=$RANDOM
+ value4=$[8192 + (RANDOM * 16383 / 32767) ]
+
+ if [ $example_count -gt 0 ]
+ then
+ example_count=$[example_count - 1]
+
+ [ $example_last -gt 16383 ] && value4=$[example_last + (RANDOM * ( (32767 - example_last) / 2) / 32767)]
+ [ $example_last -le 16383 ] && value4=$[example_last - (RANDOM * (example_last / 2) / 32767)]
+ else
+ example_count=$[1 + (RANDOM * 5 / 32767) ]
+
+ [ $example_last -gt 16383 -a $value4 -gt 16383 ] && value4=$[value4 - 16383]
+ [ $example_last -le 16383 -a $value4 -lt 16383 ] && value4=$[value4 + 16383]
+ fi
+ example_last=$value4
+
+ # write the result of the work.
+ cat <<VALUESEOF
+BEGIN example.random $1
+SET random1 = $value1
+SET random2 = $value2
+SET random3 = $value3
+END
+BEGIN example.random2 $1
+SET random = $value4
+END
+VALUESEOF
+ # echo >&2 "example_count = $example_count value = $value4"
+
+ return 0
+}