OpenStack: Testing Upgrades with Tobiko

What is Tobiko?

Tobiko is an OpenStack upgrade testing framework. It aims to provide tooling and methods for easily developing upgrade type tests.

Note: At this moment it also provides you with several built-in networking tests.

If you are familiar with OpenStack you might wonder why the current OpenStack testing framework (Tempest) is not used for that purpose.

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InfraRed: Deploying and Testing Openstack just made easier!

Deploying and testing OpenStack is very easy

If you read the headline and your eyebrows raised, you are at the right place. I believe that most of us, who experienced at least one deployment of OpenStack, will agree that deploying OpenStack can be a quite frustrating experience. It doesn’t matter if you are using it for debugging your code or it’s an integral part of your CI environment, deploying OpenStack often with changes, can be complex. Let’s stop for a minute and think why it’s like that.

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OpenDaylight & OpenStack: How to run CSIT

What is CSIT?

Continuous System Integration Tests. Basically, Suites of integration tests for testing OpenDaylight components (alone or with other projects as OpenStack for example).

If you are familiar with OpenStack testing, then  you can say it’s very similar to Tempest scenario tests.

The tests are executed automatically by OpenDaylight’s Jenkins on the lab provided by the Linux Foundation and can also be executed manually be any user, using Robot framework the integration/test repository.

This post should help you to execute the tests in your environment and publish the results with Jenkins Robot plugin.

You can also find small section of common failures in the bottom of this post.

To obtain the tests, run:

git clone https://git.opendaylight.org/gerrit/integration/test

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OpenStack Infra: Jenkins Jobs

A few days ago, while adding a new job to OpenStack Infra, I realized how difficult it must be for newcomers ( to OpenStack) to understand how OpenStack CI works and make new changes. The OpenStack Infra documentation coverage of each project is great and very detailed , but connecting the dots, which  assembles the complete work-flow can be a complex task for anyone.

Hopefully this post can help for those who unfamiliar with OpenStack Infra. This is written in a form of ‘Q & A’. If you read this and find yourself still wondering about additional subjects, please let me know and I’ll make sure to add it here.

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Openstack Neutron: troubleshooting and solving common problems

Important note: this post is based on the great sessions I Can’t Ping My VM! Learn How to Debug Neutron and Solve Common Problems of Rossella Sblendido & OpenStack Neutron Troubleshooting by Assaf Muller. So the credit goes to them. I simply gathered it here in a written form and added a little bit of description and examples.  Enjoy =)

Common problems classification

The problems you may experience can be divided into two categories:

  • Misconfiguration –  you may experience issues due to an inadequate configuration you put in the config files used by Neutron. Wrong usage of the configuration tools may also be relevant and cause some issues. In addition, a misconfigured underlying network will affect neutron functionality as every packet goes eventually through the physical. For example, it can be an external network that isn’t reachable or firewall rule that is blocking traffic from your VMs or to them. So if the underlying network isn’t working, Neutron will also fail to work properly.
  • Bug in the code – you may found a bug in the code. Good chances you are not the first to bump into this bug so it’s worth checking here if someone already reported it. If you can’t find the bug there, then you are probably the first one to catch it and you should report it so that the developers can start fixing it.
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Openstack Neutron: Introduction

Note: this introduction based on the great presentations: Introduction to OpenStack Neutron  by Assaf Amuller & Virtual Networking in OpenStack: Neutron 101 by Mark McClain and Kyle Mestery. So I highly recommend to watch those. If you don’t have the time or prefer reading, you have it gathered here. Enjoy 🙂

Neutron Core Concepts

Neutron three core concepts ( aka core resources) are:

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Openstack Neutron: L2 & L3 agents

Important note: This post is a written form of this great presentation of Carl Baldwin and Rossella Sblendido. Usually when I watching vids, I write down some notes. In this case I decided to gather most of the presentation content here in one post and share it with you as you may find it also useful. Enjoy 🙂

L2 Agent

Its main responsibility is to wire new devices (TAP interfaces created by Nova) and to configure the software bridges on the compute nodes. There are usually two bridges: br-int and br-tun.

br-int is the integration bridge. It’s the bridge that takes care of tagging & untagging the traffic which coming in or out of the VMs. To tag the traffic, it uses local vlan id and assign it to the network.

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