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Diffstat (limited to 'charts.d/example.chart.sh')
| -rwxr-xr-x | charts.d/example.chart.sh | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/charts.d/example.chart.sh b/charts.d/example.chart.sh new file mode 100755 index 00000000..641d03e5 --- /dev/null +++ b/charts.d/example.chart.sh @@ -0,0 +1,82 @@ +#!/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 +} |