Autobots @ REA
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Come and explore what the Autobots team have been doing in the past 6 months at REA. We'll look at the problems we've faced, how we've overcome them, and what has (and hasn't) worked well for us
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Nathan Vonnahme's presentation on integrating Nagios with test driven development. The presentation was given during the Nagios World Conference North America held Sept 27-29th, 2011 in Saint Paul, MN. For more information on the conference (including photos and videos), visit: http://go.nagios.com/nwcna
WebPerformance: Why and How? – Stefan Wintermeyer
This document discusses techniques for improving web performance. It begins by explaining that websites that have many similar pages, like e-commerce sites, need to care about performance to avoid lower conversions and higher bounce rates. It then discusses metrics for perceived performance, with pages feeling sluggish over 100ms and users' attention typically dropping off after 1 second. The document provides examples of caching strategies in Rails like fragment caching at the row and table levels to improve performance. It also discusses leveraging the database instead of calculating values in the view. Other techniques mentioned include pre-heating caches during off-hours, leveraging HTTP caching with ETags, and using server-side caching to serve static files without application involvement.
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Session 1 - Intro to Robotic Process Automation.pdf
👉 Check out our full 'Africa Series - Automation Student Developers (EN)' page to register for the full program:
https://bit.ly/Automation_Student_Kickstart
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[OReilly Superstream] Occupy the Space: A grassroots guide to engineering (an...
The typical problem in product engineering is not bad strategy, so much as “no strategy”. This leads to confusion, lack of motivation, and incoherent action. The next time you look for a strategy and find an empty space, instead of waiting for it to be filled, I will show you how to fill it in yourself. If you’re wrong, it forces a correction. If you’re right, it helps create focus. I’ll share how I’ve approached this in the past, both what works and lessons for what didn’t work so well.
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My presentation slides I used at JavaLand 2024
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Autobots @ REA
- 1. Autobots @ realestate.com.au Automate ALL THE THINGS (or at least the things that really matter)
- 2. Who am I? Geoffrey Giesemann @ggiesemann @geekle Technical Lead @ realestate. com.au Some newcomers mistake me for a sysadmin :(
- 3. What's the problem? (and what the hell am I talking about?)
- 4. WTF is going on?!? I hope my wife still recognises me... (deployments are *hard*)
- 5. Why so hard? (just the usual suspects)
- 9. How do we fix this? (and who do we blame?)
- 10. deploybot
- 12. with_down_in_load_balancer(server) do with_down_in_nagios(server) do puppet(server) raise "borked!" unless server.working? end end
- 15. schemabot
- 20. $ grep -r 'aa01' nagios/ | wc -l 17 $ grep -r 'aa01' puppet/ | wc -l 4 $ grep -r 'aa01' deploybot/ | wc -l 0
- 22. > show lb vserver agentadmin-prod agentadmin-prod (125.56.204.120:80) - HTTP Type: ADDRESS State: UP ... blah blah ... Bound Service Groups: 1) Group Name: agentadmin 1) agentadmin (192.168.25.1: 80) - HTTP State: UP Weight: 1 Persistence Cookie Value : my_random_str=9999 2) agentadmin (192.168.25.2: 80) - HTTP State: UP Weight: 1 Persistence Cookie Value : my_random_str=9999 ... etc etc ... > show servicegroup agentadmin agentadmin - HTTP State: ENABLED Monitor Threshold : 0 Max Conn: 0 Max Req: 0 Max Bandwidth: 0 kbits Monitor Name: http-diagnositic-warmup State: ENABLED Weight: 1 1) 192.168.25.1:80 State: UP Server Name: 192.168.25.1 Probes: 131205 Failed [Total: 2525 Current: 0] Last response: Success - HTTP response code 200 received. 2) 192.168.25.2:80 State: UP Server Name: 192.168.25.2 Probes: 131322 Failed [Total: 2428 Current: 0] Last response: Success - HTTP response code 200 received.
- 25. $ curl http://aa01/diagnostic/status/nagios OK - the application is functioning correctly $ curl http://ar01/diagnostic/status/nagios OK - the application is functioning correctly
- 26. ● custom app health checks ○ https://github.com/tribune/is_it_working ○ https://github.com/blythedunham/health_monitor ● monitor requests in munin ○ https://github.com/pka/rack-monitor
- 29. ● Don't bother trying to handle errors - just make sure you can recover from them quickly! ● As long as you have some app servers alive things will work out!
- 30. FIN
- 31. Thanks! ● http://markerguru.deviantart.com/ ● http://www.quickmeme.com/ ● http://www.doingitwrong.com/ ● Everyone who was part of @rea_autobots