Best Practices / Tech Tips &Tricks’ Blogs

How to develop Kubernetes-friendly containerised applications, part 3

kubernetes_logo October 27th, 2017

There’s a lot out there that describes how to setup Kubernetes and how to make your container run on Kubernetes, but fairly little in regard to how you should be *developing* for Kubernetes. We hope to provide you with some guidance on how to design Kubernetes-friendly Docker containers in our newest blog post series.

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How to develop Kubernetes-friendly containerised applications, part 2

kubernetes_logo October 20th, 2017

There’s a lot out there that describes how to setup Kubernetes and how to make your container run on Kubernetes, but fairly little in regard to how you should be *developing* for Kubernetes. We hope to provide you with some guidance on how to design Kubernetes-friendly Docker containers in our newest blog post series.

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How to develop Kubernetes-friendly containerised applications, part 1

kubernetes_logo October 13th, 2017

There’s a lot out there that describes how to setup Kubernetes and how to make your container run on Kubernetes, but fairly little in regard to how you should be *developing* for Kubernetes. We hope to provide you with some guidance on how to design Kubernetes-friendly Docker containers in our newest blog post series.

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Using Prometheus to monitor Postfix mail queues

Using Prometheus to monitor Postfix mail queues February 27th, 2017

Over the last couple of months we’ve published several blog posts to announce the release of various Open Source metrics exporters for Prometheus. The development of these exporters is an on-going process at Kumina, as we’re working towards replacing our existing Nagios-based monitoring setup with Prometheus. oday we’re proud to present to you our own Prometheus metrics exporter for Postfix, written in Go.

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A Prometheus exporter for Dovecot

prometheus_monitoring January 16th, 2017

To start this year’s series of contribution to the open source community, we’re proud to announce the release of yet another tool that we use to monitor our production setup, namely a Prometheus metrics exporter for the Dovecot POP/IMAP mail server. If your email setup is also based on Dovecot and use Prometheus for monitoring, we’d like to invite you to give this exporter a try.

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The Collectd encrypted packet format

logstash March 21st, 2014

Yesterday, Logstash 1.4.0 was released containing many improvements, one of which was contributed by us. We’ve implemented signature verification and packet decryption in the collectd input plugin. This blogpost will give an overview of how encryption and signing is used in the collectd binary protocol. If you want to implement your own collectd receiver, this is pretty interesting.

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Automated monitoring? Easy!

monitoring February 11th, 2014

One of the things we take very serious here at Kumina is our monitoring. We’ve always done so, but even we must admit that during the starting years, we sometimes forgot to include all possible checks for a new service or host. And it sucks when you forget to setup the monitoring for a specific item, because you generally only find out about it when it’s actually down already… We like to check as much as possible (if not everything). Here’s an explanation on how we actually deploy our monitoring and trending based on the applications that are installed.

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Icinga check for Linux.Fokirtor

icinga November 15th, 2013

We’ve written a check for detecting the Fokirtor backdoor.

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