I've been working with Hobbit for all of a couple of weeks now, although I have some limited exposure to Big Brother in a previous life...
In order to learn the tool better, I wrote a simple custom monitor that watches Heap usage in an application server. This seems to be collecting data fine, but now I want to figure out how to graph this information in an rrd graph.
Here's where I stand.
I have a column called "weblogic" in Hobbit.
When you click on that column for a given host, you see a field called "used_heap"
I edited hobbitserver.cfg and added a piece at the end of the TEST2RRD line: weblogic=ncv
I also added a line to the same file: NCV_weblogic="usedheap:Gauge"
I I'm generating a file called weblogic.rrd in ../data/rrd/<HOSTNAME>
But, when I go to the weblogic column, at the bottom of the page there is a space where the graph should be that says "hobbit graph ncv:weblogic" No graph.
I THINK everything is ok up to this point, but then comes the hobbitgraph.cfg file, and I have to be honest, I really don't understand this file at all and haven't come across a good explanation yet, so I'm open to someone telling me to go read some website before I post, if it's glaringly obvious. I used some other files and the examples I found online to come up with this...
[weblogic]
TITLE Heap Usage
YAXIS Bytes
DEF:heap=weblogic.rdd:usedheap:AVERAGE
LINE2:heap#00CCCC:Heap Used
COMMENT:\n
GPRINT:heap:LAST:Heap Used \: %5.1lf%s (cur)
GPRINT:heap:MAX: \: %5.11f%s (max)
GPRINT:heap:MIN: \: %5.11f%s (min)
GPRINT:heap:AVERAGE: \: %5.11f%s (avg)\nI could use some help getting this graph going, and even explaining the entries in the hobbitgraph.cfg file if anyone has the patience to help walk me through this.
- Brian