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AWS ECS: seamlessly handle app versioning

By Joris Berthelot Published January 29th 2018 Tagged aws, amazon aws, docker, go, golang, versioning, ecs, container, aws ecs, semver, protip, cloudop, deployment, ci

Our latest project at work involved another Go API and in the effort of easing our debugging and issue tracking I'm used to inject the app version into the logs.
It helps a lot monitoring, especially when rolling out a new version (canary, 50% traffic deployment, etc.).

Preamble

Pre-2018, I hardcoded the version in an app constant which I would increment as part of my release process. It's easy, quick but the only issue is to not forget about it because you may lose versioning syncing over time.

Plus, considering this to be done before each new release, this adds

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S3: List objects using filters

By Joris Berthelot Published November 22nd 2017 Tagged english, s3, amazon aws, shell, sys-admin, howto, trick, aws, cli

One thing that really sucks about the Amazon S3 command is not being able to efficiently list objects using the exclude and include filters.

I recently had a case when I needed to list GZip archives from one of our S3 buckets but only the ones ending by .gzip.

Since the ls command doesn't support filters (yet?), I found another way to get that listing: use the cp command, but in dry-run mode:

#!/bin/bash
export AWS_ACCESS_KEY_ID=
export AWS_SECRET_ACCESS_KEY=

# Very important: DO NOT remove the --dryrun flag!
aws s3 cp s3://bucket-name . --recursive --no-progress
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MySQL: adding an index on a big-ass table

By Joris Berthelot Published July 28th 2016 Tagged mysql, howto, english, code, sql, database

Okay, I'll admit it: SQL and big data things aren't at the top of my skillset.

No earlier than today, I resolved an issue we had in our customer databases: adding a missing index.
Seems easy at first but if the table is HUGE (yea, 8GB+ is big for me) with about 246MM rows (!!), it gets damn slow and the downtime doesn't last for an eye blink.

Reminder: ALTER TABLE allows read operations while altering the table then blocks reads and writes ops when the alteration is done and needs to go live. This may vary according to the configuration

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Chrome: how to fix a gone basic auth dialog

By Joris Berthelot Published July 7th 2016 Tagged google, howto, english, osx, chrome, browser, issue, basic auth, error

Last night, I tried to display a basic auth protected page but without any success because I didn't know the credentials. Obviously, I got a 401 Error.

Today, I was back to that page with the credentials but Google Chrome wouldn't display the basic auth dialog anymore. How annoying to have directly the HTTP 401 Error page right away!

I found the fix from this page and I'm sharing it here so it will be faster for me to get to the fix as it might be for you as well.

Anyway, from the command line (I'm a OSX user)

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Ghost: RetinaJS integration

By Joris Berthelot Published June 13th 2016 Tagged english, ghost, trick, templating, javascript, howto, design, development, retinajs

In this post, I will show you how to quickly make your Ghost blog retina-ready.

If you are new to the retina thing, please read the Wikipedia page so you know what we are talking about.

Step 1: make your images retina-ready

I won't explain the whole thing about how to make your images retina-ready but this article covers the most of it.

Whether or not you are using the provided Photoshop export script, just make sure you save your files with @{factor}x.{ext} instead of _{factor}x.{ext}.
Where:

  • {factor} is the image dimension factor
  • {ext} is the
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Nunjucks: inject Express request to templates

By Joris Berthelot Published March 23rd 2016 Tagged nodejs, english, templating, javascript, twig, silex, howto, nunjucks, expressjs, express, js-project, node

On my free time, I recently started to think about the next version of my photography portfolio which starts to be old and especially is not designed to be effectively browsable on tablets.
And, there are also other things I'd like to fix...

Anyway, as I recently got some basic skills in NodeJS, I challenged myself to rewrite my dear portfolio with this technology. I looked for an interesting templating engine not too far from Twig which I like a lot then I chose to go with Nunjucks, which is very similar and seems not to be dead.

In my

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