Painless Microservice Development

How to develop microservices with a Vagrant, Ansible and Nginx

https://github.com/Vorago/painless-microservice-development

1. Painless microservice development
2. Andrew Naydyonock andrew.naydyonock vorago vorago Software Engineer Team Lead Teacher Java DevOps
4. Microservice development Issues Solutions Advices
5. Usual problems
6. Not enough RAM
7. Selenium test won’t run without a tweak
8. Functional tests take forever to finish
9. Infrastructure requires maintenance
11. Possible resolutions • Buy more RAM • Don’t run selenium on a local machine • Infrastructure maintenance on Friday morning • Give up
12. We actually bought RAM
13. But it did not solve our problems
14. Core concept Painless microservice development
15. Service A Service B Front end All local Local
16. Service A Service B Front end VM All in a VM
17. Nginx Service A Service B Front end VM All in a VM + Nginx
18. Where we are now
19. Nginx Service A Service B Front end Service A Service B Front end VM One service running from IDE Local
20. Nginx Service A Service B Mock Front end Service A Service B Front end VM How about a mock? Local
21. Nginx Service A Mock Service B Front end Service A Service B Front end VM Developing Service B Local
22. Nginx Service A Mock Service B Mock Front end Service A Service B Front end VM Front end Local
23. Nginx Service A Service B Front end VM Selenium Local
24. Summary
25. Not enough RAM Mock irrelevant services
26. Selenium requires tweaks Production-like environment
27. Functional tests are slow Personal Selenium Grid
28. Infrastructure maintenance Automated provisioning
29. How to make it real?
30. Tools Ansible Vagrant Nginx Wiremock
31. Ansible • Agentless • Idempotent • YAML-configured Build production-like VMs for development
32. For both production and local environments ---
 - hosts: vagrant
 become: true
 become_user: root
 tasks: 
 - name: Install nginx
 apt:
 name: nginx
 state: present 
 - name: Autostart nginx
 service:
 name: nginx
 enabled: yes
 state: started
33. Build production-like VMs for development • Easy to use • Light configuration • Works seamlessly with Ansible Vagrant
34. ansible-provision.sh Vagrantfile Vagrant.configure('2') do |config|
 config.vm.box = 'ubuntu/trusty64'
 config.vm.synced_folder '.', '/vagrant'
 config.vm.network 'forwarded_port', guest: 80, host: 8080 config.vm.provision :shell, path: 'bootstrap.sh'
 config.vm.provision :shell, path: 'ansible-provision.sh'
 end
 cd /vagrant/ansible
 ansible-playbook setup.yml -i inventory/local
35. • Reverse proxy • Reload config on the fly Nginx Webserver
36. • Fluent API • Lightweight WireMock Java framework for HTTP stubbing new WireMockServer(8888).start();
 WireMock.configureFor("localhost", 8888);
 
 stubFor(get(urlEqualTo("/hello"))
 .willReturn(aResponse()
 .withHeader("Content-Type", "text/plain")
 .withBody("Hello world!")));
37. A piece of cake git pull vagrant up
38. Important bits
39. Service discovery etcd + confd
40. Nginx configuration Go for configuration file per service Bunch of includes in nginx.conf is easier to handle
41. Databases Deploy all databases inside a Vagrant
42. Databases & Vagrant Vagrant.configure('2') do |config|
 config.vm.box = 'ubuntu/xenial64'
 config.vm.synced_folder '.', '/vagrant'
 config.vm.provision 'shell', path: 'bootstrap.sh'
 config.vm.network 'forwarded_port', guest: 80, host: 8080
 config.vm.network 'forwarded_port', guest: 5432, host: 5432
 config.vm.provision :shell, path: 'ansible-provision.sh'
 end
 
 Don’t forget to forward your ports
43. VirtualBox dynamic port forwarding VBoxManage controlvm "VM name" natpf1 “postgres,tcp,,5432,,5432” VBoxManage controlvm "VM name" natpf1 delete postgres
44. Selenium grid Having a selenium grid and a fistful of nodes will speed up your testing
45. Docker Using docker inside a Vagrant makes your Ops tasks a breeze
46. Q & A Proof of Concept vorago/painless-microservice-development