LNST - Automated and Portable Network Tests

Video from Devconf.cz: http://youtu.be/N8XZX_jhjSk

In this presentation, we would like to introduce a tool we have been working on for the last couple of months. Our main goal is to make networking tests and reproducers as automated and portable as possible.

Testing network stacks requires a fair amount of configuration to be done on multiple machines. The configuration itself is a part of the test. However, it is often highly dependant on the environment and unfortunately, when the environment changes (due to move to a different hardware/site, changes in the addressing, or simply updates of the operating system) the configuration often breaks.

With LNST, we try to overcome these problems of transferring network configuration between different environments. We will demonstrate the ideas and the concepts we are working with, as well as the features that are a part of Linux Network Stack Test.

Transcript

1. Linux Network Stack Test Automated and Portable Network Tests Red Hat Radek Pazdera March 27, 2013 Abstract Introduction of our approach towards effective network testing.
2. Our Goal 2/21 A library of network tests to easily catch regressions in networking code
3. The Problem Is Portability 3/21 Simple Ping Test $ ping 192.168.0.2 The test will break when the addresses change
4. And Too Much Configuration 4/21 Simple Bonding Configuration ip addr flush eth4 ip addr flush eth1 modprobe bonding max bonds=0 echo "+ bond0 " > /sys/class/net/bonding masters ip link set eth4 down echo "+ eth4 " > /sys/class/net/ bond0 /bonding/slaves ip link set eth1 down echo "+ eth1 " > /sys/class/net/ bond0 /bonding/slaves ip addr add 192.168.100.240/24 dev bond0 ip link set bond0 up
5. Network Testing Tool/Framework 5/21 To fully automate test execution and handle even the configuration of advanced networking setups with bonds, VLANs, and teams
6. Network Testing Tool/Framework 6/21 And to make the tests independent of the underlying infrastructure
7. ... 7/21 lnst Linux Network Stack Test
8. Network Tests 8/21 Infrastructure Configuration Node Behaviour
9. Infrastructure 9/21
10. Configuration 10/21
11. Node Behaviour 11/21
12. LNST Recipe All three within a single description
13. LNST Architecture 13/21 LNST Controller To manage slaves LNST Slave Dedicated test machine
14. Controller Network 14/21 Each slave must have a dedicated interface for the controller
15. Test Execution 15/21
16. Demonstration 16/21
17. Demonstration 17/21 Using the built-in TestIcmpPing module
18. Demonstration 18/21
19. Future Features 19/21 Close integration with libvirt LNST can change the infrastructure if used with virtualization Adding and removing interfaces from virtual machines Controlling routers/switches GUI for interactive editing of XML recipes
20. Project Information 20/21 Website: http://fedorahosted.org/lnst Mailing list: <lnst-developers@lists.fedorahosted.org> IRC: #lnst @freenode Please feel free to contact us!
21. The end. Thanks for listening @radekpazdera http://linuxwell.com rpazdera@redhat.com