<html><head><title>Re: [smokeping-users] Automatically download fresh .png snapshot.</title>
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<span style=" font-family:'Courier New'; font-size: 9pt;">This thread might help.<br>
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</span><a style=" font-family:'Courier New'; font-size: 9pt;" href="https://www.mail-archive.com/smokeping-users%40lists.oetiker.ch/msg04777.html">https://www.mail-archive.com/smokeping-users%40lists.oetiker.ch/msg04777.html</a> <br>
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<span style=" font-family:'Courier New'; font-size: 9pt;">-Greg<br>
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<td><span style=" font-family:'calibri'; font-size: 11pt;">That’s actually exactly what I’m trying to avoid. ;) <br>
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.<br>
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— Daniel Crandall<br>
Savant - DevOps<br>
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<span style=" font-size: 12pt;"><b>From: </b>Douglas Spindler <</span></span><a style=" font-family:'calibri'; font-size: 12pt;" href="mailto:doug.spindler@gmail.com">doug.spindler@gmail.com</a><span style=" font-family:'calibri'; font-size: 12pt;">><br>
<b>Date: </b>Wednesday, March 23, 2016 at 11:09 AM<br>
<b>To: </b>Daniel Crandall <</span><a style=" font-family:'calibri'; font-size: 12pt;" href="mailto:daniel.crandall@savant.com">daniel.crandall@savant.com</a><span style=" font-family:'calibri'; font-size: 12pt;">>, "</span><a style=" font-family:'calibri'; font-size: 12pt;" href="mailto:smokeping-users@lists.oetiker.ch">smokeping-users@lists.oetiker.ch</a><span style=" font-family:'calibri'; font-size: 12pt;">" <</span><a style=" font-family:'calibri'; font-size: 12pt;" href="mailto:smokeping-users@lists.oetiker.ch">smokeping-users@lists.oetiker.ch</a><span style=" font-family:'calibri'; font-size: 12pt;">><br>
<b>Subject: </b>RE: [smokeping-users] Automatically download fresh .png snapshot.<br>
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<span style=" font-family:'times new roman'; font-size: 11pt;">Can’t you just take a screenshot? <br>
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<b>From:</b> smokeping-users [</span><a style=" color: #0563c1; font-family:'times new roman'; font-size: 11pt;" href="mailto:smokeping-users-bounces+doug.spindler=gmail.com@lists.oetiker.ch">mailto:smokeping-users-bounces+doug.spindler=gmail.com@lists.oetiker.ch</a><span style=" font-family:'times new roman'; font-size: 11pt;">] <b>On Behalf Of </b>Daniel Crandall<br>
<b>Sent:</b> Wednesday, March 23, 2016 10:32 AM<br>
<b>To: </b></span><a style=" color: #0563c1; font-family:'times new roman'; font-size: 11pt;" href="mailto:smokeping-users@lists.oetiker.ch">smokeping-users@lists.oetiker.ch</a><br>
<span style=" font-family:'times new roman'; font-size: 11pt;"><b>Subject:</b> [smokeping-users] Automatically download fresh .png snapshot.<br>
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Hi,<br>
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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:<br>
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1) Download the png using wget<br>
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I learned about setting the displaymode=a and adjusting the start and end URL chunks to get a URL like this:<br>
</span><a style=" color: #0563c1; font-family:'times new roman'; font-size: 11pt;" 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><br>
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<span style=" font-family:'times new roman'; font-size: 11pt;">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:<br>
`wget -nd -r -l 5 -A png </span><a style=" color: #0563c1; font-family:'times new roman'; font-size: 11pt;" 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> <br>
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<span style=" font-family:'times new roman'; font-size: 11pt;">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.<br>
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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. <br>
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.<br>
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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.<br>
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Thanks!<br>
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— Daniel Crandall<br>
Savant - DevOps<br>
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