Having Fun With IoT

With the blazing fast technology progress it’s now easier than ever to build all kinds of interconnected gadgets, something which the corporate world might refer as IoT – Internet Of Things. For me, it’s just an excuse to spend time playing around with electronics. I’ve been installing all kinds of features into our summer cottage (or mökki, as it’s called in Finnish), so this blog post shows around some things which I’ve done.

Problems with Terraform due to the restrictive HCL.

Terraform is a great tool to define cloud environments, virtual machines and other resources, but sadly it’s default usage of HCL (Hashicorp Configuration Language) is very restrictive and makes IaaC (Infrastructure-as-a-code) look more like Infrastructure-as-copy-paste. Here are my findings on all different issues which makes writing Terraform .tf files with HCL pain (as on Terraform v0.7.2). …

Using HAProxy to do health checks to gRPC services

Haproxy is a great tool to do load balancing between microservers, but it current doesn’t support HTTP/2.0 nor gRPC directly. The only option now is to use tcp mode to load balance gRPC backend servers. It is however possible to implement intelligent health checks to gRPC enabled backends using “tcp-check send-binary” and “tcp-check expect binary” …

Raspberry Pi as a 3G to WiFi access point and home automation

I’ve just deployed a Raspberry Pi into our summer cottage to function as a general purpose home automation and internet access point. This allows visitors to connect to internet via wifi and also enables remote administration, environmental statistics and intrusion alerts. Parts: Raspberry Pi, 4GB memory card PiFace Digital (for motion sensors and heating connection, not …

Avointa maastotietodataa – löytyisikö sitä uutta kiipeiltävää?

Osana valtionhallinnon avoimen datan hanketta Maanmittauslaitos avasi vihdoin arkistonsa kaiken kansan nähtäville. Ehkä mielenkiintoisin näistä on Maastotietokanta, joka sisältää eritellysti yhtenä valtavana tietokantana kaikki Maanmittauslaitoksen kartoittamat yksityiskohdat maastosta. Kiipeilijät ovat pitkään etsineet uusia potentiaalisia kiipeilypaikkoja selailemalla karttoja, mutta voisiko hommaa helpottaa? Maanmittauslaitos määrittelee Kiven seuraavasti: Yli 2.5 m korkea tai yleisesti tunnettu tai vähäkivisellä seudulla …

Setting backup solution for my entire digital legacy (part 2 of 2)

As part of my LifeArchive project, I had to verify that I have sufficient methods to back all my valuable assets so well that they will last for decades. Sadly, there isn’t currently any mass media storage available that is known to function for such a long time, and in any way you must prepare for losing a site due to floods, fire and other disasters. This post explains how I solved my backup needs for my entire digital legacy.