Apresentação realizada no primeirto meetup do Ada.rb

1. 25 de Novembro de 2020
Migrando um legado
de 30M de Requests/Dia
1º encontro do ada.rb

2. Gabriel Pereira
@gabrielpedepera

8. Disclaimer

10. Domain

12. Challenge

14. Code

15. Consumer

16. REST APIs

17. Good Test Suite

18. Strategy

19. ctrl + c
ctrl + v

20. $ bundle exec rails server

21. Monitoring

22. How make sure that everything is
working correctly? 🤔

24. Diffy

25. Diffy

26. Diffy Interface

27. NGINX + Diffy
Monitoring

28. server {
listen 80;
server_name "nginx-diffy-proxy";
location / {
proxy_pass http://primary;
}
location /endpoint-to-be-migrated {
mirror /mirror;
mirror_request_body on;
add_header X-Will-Mirror 'Yes';
proxy_pass http://primary;
}
location = /mirror {
internal;
proxy_set_header X-Original-Host $host;
proxy_pass http://diffy$request_uri;
}
}

29. server {
listen 80;
server_name "nginx-diffy-proxy";
location / {
proxy_pass http://primary;
}
location /endpoint-to-be-migrated {
mirror /mirror;
mirror_request_body on;
add_header X-Will-Mirror 'Yes';
proxy_pass http://primary;
}
location = /mirror {
internal;
proxy_set_header X-Original-Host $host;
proxy_pass http://diffy$request_uri;
}
}

30. server {
listen 80;
server_name "nginx-diffy-proxy";
location / {
proxy_pass http://primary;
}
location /endpoint-to-be-migrated {
mirror /mirror;
mirror_request_body on;
add_header X-Will-Mirror 'Yes';
proxy_pass http://primary;
}
location = /mirror {
internal;
proxy_set_header X-Original-Host $host;
proxy_pass http://diffy$request_uri;
}
}

31. server {
listen 80;
server_name "nginx-diffy-proxy";
location / {
proxy_pass http://primary;
}
location /endpoint-to-be-migrated {
mirror /mirror;
mirror_request_body on;
add_header X-Will-Mirror 'Yes';
proxy_pass http://primary;
}
location = /mirror {
internal;
proxy_set_header X-Original-Host $host;
proxy_pass http://diffy$request_uri;
}
}

32. server {
listen 80;
server_name "nginx-diffy-proxy";
location / {
proxy_pass http://primary;
}
location /endpoint-to-be-migrated {
mirror /mirror;
mirror_request_body on;
add_header X-Will-Mirror 'Yes';
proxy_pass http://primary;
}
location = /mirror {
internal;
proxy_set_header X-Original-Host $host;
proxy_pass http://diffy$request_uri;
}
}

33. Diffy Interface

34. NGINX
Replacing the APIs

35. server {
listen 80;
server_name "nginx-diffy-proxy";
location / {
proxy_pass http://primary;
}
location /endpoint-to-be-migrated {
add_header X-Candidate-Service 'Yes';
proxy_pass http://candidate;
}
}

36. server {
listen 80;
server_name "nginx-diffy-proxy";
location / {
proxy_pass http://primary;
}
location /endpoint-to-be-migrated {
add_header X-Candidate-Service 'Yes';
proxy_pass http://candidate;
}
}

39. Questions?

40. Thank You !!

41. References
• https://gabrielpereira.dev/pt_br/2020/10/28/migrando-apis-utilizando-diffy-e-
nginx
• https://travelupdate.com/gladys-ingle-repairing-plane-video
• https://blog.twitter.com/engineering/en_us/a/2015/diffy-testing-services-
without-writing-tests.html
• https://www.softwaretestingmagazine.com/videos/regression-testing-with-
diffy
• https://medium.com/@rahulmuthu80/mirroring-incoming-web-traffic-with-
nginx-fit-devops-d688ddca7d30