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Manneken-Tech

Where Tech meets Beers

Author

Arnaud Marchand

Heavily interested in new technologies, I like to upgrade old software to the most recent standards and stack as many data I can find in order to mine it for unexpected parterns.

ELK 5.4 Released

Elastic search released the latest version of its stack. There are of course a lot of cool new things, but we also feel that they, one step after the other push people to a licence model. I have no problem with that but it makes the life of people that want to keep a licence free stack more difficult.

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Linking Node Red and various MQs

Node red is a really nice framework that lets you build IoTs workflows. It is in fact far more interesting than that because you can use it in order to create small workflow integrations as you would do with a product like Mule or Camel. Of course you should not use it if you want to handle critical financial messages using a MQ Series transaction but it can handle most of the less critical cases.

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Testing ELK 5.2

ELK 5.2 has arrived and there are some nice additions. Please find below a complete docker-compose file that let’s you quickly play with the latest versions of elastic search, kibana and a few additional tools used to monitor the system.

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Monitoring Docker 2

There are a lot of tools that can be used to monitor docker as explained in this previous post, but it could be interesting to keep the history of the CPU and memory used by each individual container.

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Playing With Kairos DB

KairosDB is a time series database built on top of Cassandra, one of the top NoSQL database. It has a very simple API and a nice Grafana plugin in order to display the time series.

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Which technology for a REST API

Creating a REST API is one of the building block of lot of software. It lets us access to data using an easy protocol accessible by most of the recent programming languages. That’s great but which language should we use to build the API.

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Linking InfluxDB and Grafana

We will once again use docker to deploy a fully functional stack of InfluxDB and Grafana. I was a little bit disappointed by the lack of free options to scale the InfluxDB horizontally but however, it is still a nice product when it is deployed in a single server.

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Playing with a Cassandra cluster via Docker

Docker is the best tool to quickly check new technologies without the hassles of installations.

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Monitoring Docker

There are multiple ways to monitor docker, at the end the power user will probably stick with the command line tools, but at least two free software can definitively help. And cherry on the cake, the two of them can be deployed as containers.

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