Setup Let’s Encrypt SSL on Google Appengine

Let’s Encrypt is a new Certificate Authority: It’s free, automated, and open.

“Let’s Encrypt” is a really great initiative (and a tool) that, I hope, will improve security of the modern web. It have very nice client, that will do all work automatically (unfortunately it’s not yet supported by Google Appengine). It’s supposed to run on target server, where it can validate domain and configure your Apache/Nginx/etc. But in of Appengine we don’t have such server, so have to generate and upload SSL certificate manually. I’ll show you how.
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Analyze Appengine logs with Kibana

Google Cloud have a nice Log Service, with some cool features (like Traces, I wrote before), but it lacks real analytics based on this logs. Like Kibana.

Fortunately Google Cloud can export logs to Cloud Storage. What’s cool is that this logs are in JSON format, so we could easily import them into ELK, without any complex Logstash configuration (honestly I cannot say that JSON schema fits well ELK, but still it’s easy to import).

I’ve prepared a basic Docker container with Elasticsearch, Logstash and Kibana configured for Appengine logs. Run ELK container with:

(you can get sources of this Docker image there).
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Trace Reports for Performance Tuning in Appengine

Fixing webapp speed is really hard job, mostly because it’s hard to find a bottleneck. And I want to show some tools that Google Appengine gives you for this job. Actually i’m going to tell about combination of two tools, that works just perfectly together.

First thing is Traces (under Monitoring tab in Cloud Console). It’s kind of a new tool, and I didn’t pay much attention earlier, just played a little. I thought it’s just another view to your logs, from Appengine APIs point of view:

gae traces - details - full

It shows you details about requests, with information about which API calls were made, how much time server spent on them, how much it did cost, etc. Pretty useful information btw.

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