OSDC 2014: Andreas Schmidt - Testing server infrastructure with serverspec
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Companies that focus on cloud infrastructures for both developing and running their applications are likely to have the highest benefit of test driven infrastructure tools such as configuration management and their spec-oriented testing counterparts. However many enterprises have not moved to the cloud yet. Often limited by contracts, regulations or security considerations, they too are in need of testing their infrastructure that service providers built for them. The talk shows approaches to infrastructure testing and demonstrates the use of serverspec (http://serverspec.org/).
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OSDC 2014: Andreas Schmidt - Testing server infrastructure with serverspec
- 1. © 2014 Cassini Consulting Andreas Schmidt Testing server infrastructure with serverspec
- 2. Cassini Consulting @cassinigmbh • IT & Management Consulting Andreas Schmidt • From Dev to Ops • Infrastructure & Deployment Automation w/ ruby
- 3. • Purpose of infrastructure testing • #serverspec • Examples / Demo • Use Cases & benefits ? !
- 8. „Startup“ • Recent cloud technology • Virtual Infrastructure Provisioning • „Phoenix Server“ „Classic“ IT Environments • Both virtualized & non-virtualized • Mixed Provisioning processes • IT outsourcing • IT System & Software Architecture Regulated IT Environments • i.e. banking, insurance companies, government • + Compliance • + Security Low Cost Short Cycle Time Documentation (Internal/External) Audit Capabilities Internal Documentation Acceptance Tests
- 10. Lower-level configuration aspects • VM infrastructure & kernel parameters • Networking • Logical volume management Side effects • RPM post-install scripts Documentation • Specification of infrastructure • Human Readable Testing on machine itself what‘s missing?
- 12. serverspec • www.serverspec.org • github.com/serverspec/serverspec MIT License Gosuke Miyashita @gokusenator „With serverspec, you can write RSpec tests for checking your servers are configured correctly.“
- 13. serverspec describe package 'openssh-server' do it { should be_installed } end describe file '/etc/ssh/sshd_config' do it { should be_mode 600 } it { should be_owned_by 'root' } end describe service 'ssh' do it { should be_enabled } end
- 17. Development box CM code Staging Provision Test locally CM code specs box „state“ server spec „Spec“ box
- 18. Development box CM code Staging Provision Test locally CM code specs box „state“ Test on server(s) server spec „Spec“ box
- 19. Development box CM code Staging Local VM or Container Provision Test locally CM code specs box „state“ Provision Test on server(s) server spec „Spec“ box
- 20. Development box CM code Staging Local VM or Container Provision Test locally CM code specs box „state“ Test Provision Test on server(s) server spec „Spec“ box
- 21. Development box CM code Staging Local VM or Container Provision Test locally CM code specs box „state“ Test Provision Test on server(s) server spec „Spec“ box
- 22. $ gem install serverspec diff-lcs, highline, rake net-ssh rspec, rspec-core, rspec- expectations, rspec-mock specinfra, serverspec Basics ssh to target hosts spec basics „Backend“ for infrastructure tests (local/remote, command abstraction, helpers) „Frontend“ w/ resource types à rspec
- 23. Demo • Serverspec Basics • Overview of resource types • Using abstractions and facts • Introduce roles • Environment-independent specs through properties
- 24. Monitoring vs. Spec • Dynamic Aspects (crashed servers, services not reachable, disk full, ...) • Mostly in „internal form“, not human readable, special checks buried in scripts • Static Aspects (how system is built) • Explicit form, human readable • Keep your system up & running • Build according to a specification and prove compliance with it
- 25. Additional tools • Comparable: rspec-system (! beaker-rspec), rspec-system-serverspec • Integrate serverspec into vagrant as a provisioner: github.com/jvoorhis/vagrant-serverspec • Reporting http://vincent.bernat.im/en/blog/2014-serverspec-test- infrastructure.html
- 31. Work test driven – Define, build, compare your environments.
- 32. github.com/aschmidt75/serverspecplayground andreas.schmidt@cassini.de xing.to/aschmidt @aschmidt75 ?
- 33. Cassini Consulting Niederlassung Düsseldorf Andreas Schmidt Bennigsen-Platz 1 40474 Düsseldorf Deutschland andreas.schmidt@cassini.de visit www.cassini.de Alle Angaben basieren auf dem derzeitigen Kenntnisstand. Änderungen vorbehalten. Dieses Dokument von Cassini Consulting ist ausschließlich für den Adressaten bzw. Auftraggeber bestimmt. Es bleibt bis zur einer ausdrücklichen Übertragung von Nutzungsrechten Eigentum von Cassini. Jede Bearbeitung, Verwertung, Vervielfältigung und/oder gewerbsmäßige Verbreitung des Werkes ist nur mit Einverständnis von Cassini zulässig.