[rrd-users] Still trying to create a graph from multiple sources in RRDtool

[Matthew M. Boedicker]

You will have to put the rrd filenames in quotes so Python will interpret
them as strings and not Python syntax.

On Mon, Jun 16, 2008 at 10:12:09AM -0400, Emily Chouinard wrote:
> Alright so I've tried following everyone advice, thanks by the way, and 
> I've got this far and now I can't get the rrdcreate to work when I run 
> my code
> 
> import rrdtool
> import os
> import time
> 
> interval = 5
> interval = str(interval)
> interval_mins = float(interval) / 60 
> heartbeat = str(int(interval) * 2)
> 
> while True:
>     infile= open('/proc/stat', 'r')
>     #for x in range(0,1): #Reads first line only
>     line = infile.readline()
>     if line.startswith('cpu'): #Check to make sure in 1st line
>     info = line.split()    #Returns a list of the words in the string
>     usr_info = info[1]              # These 3 index the specific CPU usages
>     sys_info = info[3]
>     idle_info = info[4]
>     print  usr_info, sys_info, idle_info #Print out so you can see 
> what's happening
>    
>     rrdtool.create (usr.rrd,
>         ' DS:usr_info:COUNTER: %s:U:U % heartbeat', 
>         ' RRA:AVERAGE:0.5:1:', str(int(4000 / interval_mins)),
>             ' RRA:AVERAGE:0.5:', str(int(30 / interval_mins)), ':800',
>                ' RRA:AVERAGE:0.5:', str(int(120 / interval_mins)), ':800',
>             ' RRA:AVERAGE:0.5:', str(int(1440 / interval_mins)), ':800')
>    
>     rrdtool.create (sys.rrd,
>         ' DS:sys_info:COUNTER: %s:U:U % heartbeat',
>         ' RRA:AVERAGE:0.5:1:', str(int(4000 / interval_mins)),
>             ' RRA:AVERAGE:0.5:', str(int(30 / interval_mins)), ':800',
>             ' RRA:AVERAGE:0.5:', str(int(120 / interval_mins)), ':800',
>             ' RRA:AVERAGE:0.5:', str(int(1440 / interval_mins)), ':800')   
>    
>     rrdtool.create (idle.rrd,
>         ' DS:idle_info:COUNTER: %s:U:U % heartbeat', 
>         ' RRA:AVERAGE:0.5:1:', str(int(4000 / interval_mins)),
>             ' RRA:AVERAGE:0.5:', str(int(30 / interval_mins)), ':800',
>             ' RRA:AVERAGE:0.5:', str(int(120 / interval_mins)), ':800',
>             ' RRA:AVERAGE:0.5:', str(int(1440 / interval_mins)), ':800')
>      
> rrdtool.update (usr.rrd, 12322)
> rrdtool.update (sys.rrd,12322)
> rrdtool.update (idle.rrd,12322)
> 
> rrdtool.graph(test.rrd.png,
>     ' --width','400',
>     ' --height', '150',
>     ' --start', 'now- %s' % (mins * 60),
>     ' --end', 'now',
>     ' --vertical-label', 'CPU Usuage',
>     ' --title', 'EXAMPLE',
>     ' COMMENT',time.strftime('%m/%d/%Y %H\:%M\:%S', time.localtime()),
>     ' DEF:ds0= usr.rrd:ds0:AVERAGE ',
>      ' DEF:ds1 = sys.rrd:ds1:AVERAGE:step=800',
>      ' DEF:ds2= idle.rrd:ds2:AVERAGE:step=800',
>         ' AREA:ds0#0000FF:"User CPU usuage"',
>         ' LINE1: ds1#00FF00:"System CPU usuage" ',
>         ' LINE1: ds2#FF0000:"Idle CPU usuage" ')
> 
> I get this error   # python mult_rrd.py
> 246176 97876 103312642
> Traceback (most recent call last):
>   File "mult_rrd.py", line 21, in ?
>     rrdtool.create (usr.rrd,
> NameError: name 'usr' is not defined
> 
> And this is where I am stuck, I'm not sure why it is giving me this 
> error, I thought the rrdtool.create defined the file usr.rrd if not let 
> me know what I should do to fix it, also let me know if you see other 
> things gone wrong in here (maybe take a peek at my rrdtool.update 
> commands), thanks!
>     Emily
> 
>        
> 
> 
> Fabien Wernli wrote:
> > On Fri, Jun 13, 2008 at 11:40:28AM -0400, Matthew M. Boedicker wrote:
> >   
> >> For CPU usage you might want to try GAUGE instead of COUNTER. For graphing
> >>     
> >
> > no you don't: Emily is pulling /proc/stat values which _are_ counters
> > using GAUGE would produce endlessly growing values
> >
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> >
> >   
> 
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