Kalle Happonen

Agile services - Part 2: Horizons

This is the second post in the series about how to apply Agile methods to run services based on existing software.

The previous post describing the problem at some length is here, but the TL;DR; is

I don't think there are great resources on how to apply agile methods to run and develop services based on existing . . .

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August 29, 2022

Agile services - Part 1: Background

When I started this blog, the goal was to make a writeup of any problem I couldn't easily duckduckgo the answer to.

Well, now I have gone quite far down the rabbit hole, as the goal apparently changed to a problem that I can't find a good answer to in dudckduckgo, several books, courses etc.. This time the topic is not . . .

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August 29, 2022

Git compliance management

Or: Now when I'm a manager my blog topics are boring

Most people in the modern software defined infrastructure space have at least stumbled upon the term GitOps.

In short - at least in the head of your's truly - GitOps is an evolution from infrastructure as code. Basically it means consistent, controlled automatic deployments and updates of your infrastructure based on git . . .

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August 08, 2019

Ceph - a long debug

Hello again! Yet a longer time between posts, but at least my colleagues on https://pouta.blog.csc.fi are holding the fort!

Generic disclaimer: Ceph Hammer/Jewel, CentOS7

Most of the work was done by our Ceph team, yours truly was partially involved.


We've been using Ceph for a long time, and . . .

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July 05, 2018

Resize problems

It's a while since the last blog. For some reason the technial blog posts stopped at the same time I took the product owner hat. Interpret that as you may.

Normal disclaimer: CentOS 7, RDO on OpenStack Newton

I can't resize!

Resizing and migrating VMs are some of the standard tools in the OpenStack arsenal . . . .

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February 26, 2018

Rally and Tempest

Or: your cloud probably has problems

When you operate a complex system, like OpenStack, one of the most important things is to know the state of the system. What works, what's broken and what's broken for a known reason. Without this information it's really hard to make changes to the system.

I think pretty much all OpenStack installations have their own way . . .

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July 20, 2017

Liberty to Newton

Sorry Mitaka

Here's my traditional OpenStack upgrade blog post. I usually write these after all of our major OpenStack upgrades.

Our stack: CentOS 7, RDO, Puppet + Ansible, Linuxbridges + VLAN, Ceph

We're a dinosaur who still has monolithic API nodes (Most services running on a pair of VMs), which is relevant for this procedure.

. . .

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May 31, 2017


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