Ljubljana, Slovenia

Digitalocean

Auto-scaling a Docker Swarm

Setting up a Docker Swarm (“docker swarm mode” if you want to be more accurate), is pretty much a trivial process. You need 3 nodes, create a swarm on one of them and join the other two nodes to the swarm. Simple. What if you wanted a 100 swarm nodes? How fast can you provision new nodes to scale up your Docker Swarm?

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Generate free SSL certificates with Docker and LetsEncrypt

It’s been more than a year in the waiting, after I found out that Mozilla Foundation, Akamai, Cisco, and a bunch of other big players put their support into LetsEncrypt, a free certificate authority. Back then (I’m speaking as if 2014 was still in the time of Yugoslavia or USSR), you would have to go trough several complicated steps for generating a SSL certificate for free (client certificates, issuing certificate signing requests, worrying about key size, key formats, validating your certificate via e-mail, …). I promise, the wait is over.

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Docker: portable environment

When setting up a development environment, eventually you’ll have to deal with migrating the services to another machine. Docker allows you to migrate docker images between servers, so you can take advantage of different VPS providers, more resources like memory, disk space, faster CPU or SSD drives.

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