Kalle Happonen

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

Packets - Part 2

Some time back, I wrote a post about hunting down dropped packets on our network nodes. Here's a small follow up with some performance hints.

More problems

My happy glow after fixing the previous issue didn't last for long. Our network nodes had hit the next problem.

Our network nodes are virtualized for . . .

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May 16, 2017

Logical Volume Management

Or: Paying the Price for Technical Debt

We have run OpenStack for a while. I think we went into production around Grizzly. Back then we were new to running production OpenStack systems (who wasn't?). This means we made some decisions back then, which we are still paying for.

Credit where credit is due: Almost all the real work described in this post was done by my . . .

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March 16, 2017

Packets, Drop by Drop

I originally started writing this blog to document all the tricky bugs I encountered, and google couldn't answer.

My, did I ever find one. And it wasn't one of the issues that makes you go beat yourself for not figuring it out sooner.

Network, gross work

We had a simple change in our cloud infrastructure. We . . .

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January 30, 2017

Yubikey, ibikey, let'sallbikey!

SSH is one of the most important tools I use. It has tons of cool features for the power user. First off any serious use needs SSH keys and ssh-agent to go with that. Socks proxy forwarding is super powerful, as is SSH mutlihop. GitHub works nicely with SSH, and Ansible builds on SSH. And when you use Ansible, you probably want to throw in . . .

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November 14, 2016

ScrumOpsBan

or The Blog Post I Wish I had Read a Year Ago

We've been working with OpenStack for a while now. The first version we started playing around with was Diablo in 2011. After some time of working on proof-of-concepts, and getting our hands dirty, we were tasked with setting up a production platform.

There are tons of information about the technical stuff you need to do when . . .

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November 06, 2016

Liberté

I usually write an upgrade report on our OpenStack version upgrades. We recently upgraded from Juno to Liberty. I haven't gotten to writing how it went, partly because it went so smoothly.

Disclaimer: The preparation and work behind this was mostly done by others than yours truly. Architecture-wise we still run monolithic . . .

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October 24, 2016

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