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Scrum Gathering Rio 2016 - Containerizing Tests with Docker Compose
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Stefan Teixeira
June 24, 2016
Programming
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Scrum Gathering Rio 2016 - Containerizing Tests with Docker Compose
Stefan Teixeira
June 24, 2016
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Transcript
Containerizing Tests with Docker Compose Stefan Teixeira @stefan_teixeira
[email protected]
stefanteixeira.com.br
stefanteixeira.com
• QA Automation Engineer @ Toptal • Technical blogs: stefanteixeira.com.br
(pt-br) / stefanteixeira.com (en) • Co-organizer of DevOps Carioca and Grupo de Testes Carioca meetups Links: • E-mail:
[email protected]
• Twitter: twitter.com/stefan_teixeira • LinkedIn: linkedin.com/in/stefanteixeira • GitHub: github.com/stefanteixeira • SlideShare: slideshare.net/stefanteixeira About
Docker Compose
Docker Compose • Tool for defining and running multi-container applications
https://docs.docker.com/compose/
Docker Compose • Tool for defining and running multi- container
applications • Previously known as Fig https://docs.docker.com/compose/
Docker Compose • Tool for defining and running multi- container
applications • Previously known as Fig • YAML ❤ https://docs.docker.com/compose/
Compose File (v1)
Compose File (v2)
Containerizing Tests with Docker Compose
WAT?
Containers != mini-VMs https://twitter.com/rhein_wein/status/662995114235678720
Motivation
#1 If tests (except unit tests) are hard to run
locally, developers will not run them. ¯\_(ϑ)_/¯
#2 Sometimes it’s really hard to configure a test environment.
“Docker delivers a predictable, reproducible testing environment.” (Laura Frank, Codeship)
❤
Examples
App A
App A DB
App A DB Mock Service
App A DB Mock Service API Tests
App A DB Mock Service API Tests UI Tests
App A DB Mock Service API Tests UI Tests Security
Tests
App A DB Mock Service API Tests UI Tests Security
Tests Smoke Tests
Demo
Demo • Very simple example, with three containers: • App
(a REST API) • DB (MongoDB database) • API Tests (written with Supertest) • https://github.com/stefanteixeira/demo-testing- compose
Points of attention • Logs
Points of attention • Logs • volumes or data containers
Points of attention • Logs • volumes or data containers
• Startup time
Points of attention • Logs • volumes or data containers
• Startup time • netcat (nc), curl, wait-for-it, wait_for module (Ansible)
Points of attention • Logs • volumes or data containers
• Startup time • netcat (nc), curl, wait-for-it, wait_for module (Ansible) • Generating images
Points of attention • Logs • volumes or data containers
• Startup time • netcat (nc), curl, wait-for-it, wait_for module (Ansible) • Generating images • Alpine-linux, Phusion (minimal base images)
Points of attention • Logs • volumes or data containers
• Startup time • netcat (nc), curl, wait-for-it, wait_for module (Ansible) • Generating images • Alpine-linux, Phusion (minimal base images) • Automate the process
References • "Stop Being Lazy and Test Your Software”: •
https://www.youtube.com/watch?v=Mx1Il9wIepw • http://www.slideshare.net/rheinwein/stop-being-lazy-and-test- your-software • https://hharnisc.github.io/2016/06/19/integration-testing-with-docker- compose.html • https://docs.docker.com/compose/startup-order/ • https://github.com/vishnubob/wait-for-it • https://www.ansible.com/blog/six-ways-ansible-makes-docker- compose-better
Thanks! Stefan Teixeira @stefan_teixeira
[email protected]
stefanteixeira.com.br stefanteixeira.com