“Crafting DevOps” Applying software craftsmanship to DevOps…

Daniel Bryant

daniel.bryant@opencredo.com@danielbryantuk

Software Craftsmanship

More than just clean code…

…but how does this apply to (Dev)Ops

Continuous Delivery

“Our highest priority is to satisfy the customer through early and continuous delivery of valuable software.”

Principle 1; 12 Principles behind the Agile Manifestohttp://agilemanifesto.org/principles.html

Continuous Delivery

• Continuous Integration++

• Many of us having been doing this for years…

• “DevOps” - just a label (or a philosophy)?

Lets break it down…

1. Operational influence on application code– Fault tolerance, “Antifragility”

2. The build pipeline – Fast feedback (and quality controls)

3. “Infrastructure as Code”– Software Defined Everything (SDN, SDDC)

1. Application (*service) Craftsmanship

10/04/2023 @danielbryantuk

Antifragility

• The opposite of fragile– Must be robust first– Fault-tolerant design patterns

• Netflix are best-in-class– bit.ly/1gs5n3q

2. Crafting a build pipeline

• Build tools– Jenkins, Bamboo etc.

• “Ops as a Service” deployment orchestration– Rundeck (rundeck.org)

• Supports good development– “Communication, simplicity, feedback, courage”

10/04/2023 @danielbryantuk

3. Crafting “Infrastructure as Code”

• Continuous Integration for Infrastructure– DevOps Weekly (Gareth Rushgrove)– www.ustream.tv/recorded/46670676

• Infrastructure test pyramid

Crafting Puppet

• TDD your infrastructure– puppetlabs.com/blog/test-driven-development-wi

th-puppet

• Rspec Puppet– rspec-puppet.com/tutorial/

• Puppet Acceptance– github.com/puppetlabs/puppet-acceptance

Crafting Chef

• TDD your infrastructure– leopard.in.ua/2013/12/01/chef-and-tdd/

• ChefSpec– github.com/sethvargo/chefspec

• FoodCritic– acrmp.github.io/foodcritic/

10/04/2023 @danielbryantuk

Infrastructure Integration Testing

• serverspec.org

• Test server state via ssh access

• Awesome, but not quick

Summary

Software Craftsmanship principles are not only relevant to the application code

It’s turtles all the way down…

…including the deployment and infrastructure coderequired for the continuous delivery of valuable software

Well crafted DevOps can help here!

10/04/2023 @danielbryantuk

Thanks For Listening

• Questions / comments?– daniel.bryant@opencredo.com– @danielbryantuk

• This was a beta lightning talk– Let me know if you want to hear more!

10/04/2023 @danielbryantuk

Image credits

[2] http://wordplay.blogs.nytimes.com/2011/10/10/numberplay-turtles-all-the-way-down/

[6,7] http://12factor.net/

[10]puppetlabs.com/blog/test-driven-development-with-puppet