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<div>That’s actually exactly what I’m trying to avoid. ;) </div>
<div>The keyword is automation. I need to script this so that I can present static, 7 day graphs to people outside my dept – without having to spend time manually taking screenshots of each graph.</div>
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<div>— Daniel Crandall</div>
<div>Savant - DevOps</div>
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<span style="font-weight:bold">From: </span>Douglas Spindler <<a href="mailto:doug.spindler@gmail.com">doug.spindler@gmail.com</a>><br>
<span style="font-weight:bold">Date: </span>Wednesday, March 23, 2016 at 11:09 AM<br>
<span style="font-weight:bold">To: </span>Daniel Crandall <<a href="mailto:daniel.crandall@savant.com">daniel.crandall@savant.com</a>>, "<a href="mailto:smokeping-users@lists.oetiker.ch">smokeping-users@lists.oetiker.ch</a>" <<a href="mailto:smokeping-users@lists.oetiker.ch">smokeping-users@lists.oetiker.ch</a>><br>
<span style="font-weight:bold">Subject: </span>RE: [smokeping-users] Automatically download fresh .png snapshot.<br>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Can’t you just take a screenshot?
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> smokeping-users [<a href="mailto:smokeping-users-bounces+doug.spindler=gmail.com@lists.oetiker.ch">mailto:smokeping-users-bounces+doug.spindler=gmail.com@lists.oetiker.ch</a>]
<b>On Behalf Of </b>Daniel Crandall<br>
<b>Sent:</b> Wednesday, March 23, 2016 10:32 AM<br>
<b>To:</b> <a href="mailto:smokeping-users@lists.oetiker.ch">smokeping-users@lists.oetiker.ch</a><br>
<b>Subject:</b> [smokeping-users] Automatically download fresh .png snapshot.<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:black">Hi,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:black">I need to automatically download .png of 7 day snapshots of certain smokeping graphs to send to a group of concerned parties. I’ve tried two techniques without
success:<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:black">1) Download the png using wget<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:black">I learned about setting the displaymode=a and adjusting the start and end URL chunks to get a URL like this:<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:black"><a href="https://smokeping.oursite.com/smokeping/smokeping.cgi?displaymode=a;start=now-7day;end=now;target=OurServers.HTTPSLatency.prd">https://smokeping.oursite.com/smokeping/smokeping.cgi?displaymode=a;start=now-7day;end=now;target=OurServers.HTTPSLatency.prd</a><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:black">This URL gives me a single graph with the snapshot interval I need. But I can’t figure out how to download the actual graph png. It’s weird because if I put the
URL in a browser, right click on the graph and save it manually, it saves a file called smokeping.png that is the correct graph. But when I try to do the same using wget like this:<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:black"> `wget -nd -r -l 5 -A png
<a href="https://smokeping.oursite.com/smokeping/smokeping.cgi?displaymode=a;start=now-7day;end=now;target=OurServers.HTTPSLatency.prd%60">
https://smokeping.oursite.com/smokeping/smokeping.cgi?displaymode=a;start=now-7day;end=now;target=OurServers.HTTPSLatency.prd`</a> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:black">It downloads smokeping.png – but instead of it being a graph, this version is simply the smokeping logo. It also downloads the RRD logo, but no other png files.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:black">2) Using rrdtool on the rrd files themselves to generate a png of the snapshot I’m looking for on my smokeping server, and then copying it to the web server dir
where I can then download it using wget. <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:black">Unfortunately I haven’t been able to figure out the correct rrd parameters and DEF, CDEF, AREA..etc. settings to actually generate a smokeping graph.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:black">If anyone can point me in the right direction with either of the above methods – or share another technique to achieve the same goal, I would be very grateful.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:black">Thanks!<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:black">— Daniel Crandall<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:black">Savant - DevOps<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
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