Soy desarrolladora de Software y siempre voy un paso por detrás en la parte de sistemas. Pero cuando trabajas en un equipo pequeño en una startup necesitas aprender un poco más de todo. En esta charla veremos las diferentes herramientas que Kubernetes nos provee para ayudarnos a crear una infraestructura escalable. Para la realización del taller, los asistentes necesitarán registrarse en Google Cloud con una tarjeta de crédito. Para los nuevos usuarios, tendrán disponible hasta 300 euros de crédito al registrarse, los usuarios que ya tuvieran cuenta necesitarán correr con el coste de ejecución de los recursos utilizados en el taller que será inferior a 2 dólares. Requisitos para el taller Durante el taller necesitaremos contar con un entorno de kubernetes. La opción más sencilla es utilizar un entorno de Kubernetes alojado en la nube. Por simplicidad el servicio elegido será Google Cloud, por lo que los asistentes necesitarán registrarse previamente. Para ello deberías crearte una cuenta (https://accounts.google.com/SignUp) si no tienes ya una. Accede la consola (https://console.cloud.google.com) de Google Cloud Platform y crea un nuevo proyecto. A continuación deberás activar la facturación en esta url https://console.cloud.google.com/billing. Los nuevos usuarios pueden solicitar una prueba gratis de 300$ aquí (https://console.developers.google.com/billing/freetrial?hl=en), el coste de este taller no será de más de un par de dólares.

1. Scalable
infrastructure
with kubernetes
Simplifying a developer’s life
@Laura_Morillo

2. ● Twitter: @laura_morillo
● GDG Madrid Organizer, WTM Lead
● Startup lover.
● Backend developer at Seedtag.
● 10 years working with different
technologies.
@Laura_Morillo

3. Getting ready!
1. Create a Google Account: https://accounts.google.com/SignUp
2. Register in Google Cloud Platform: http://console.cloud.google.com/
3. Request free credit:
https://console.developers.google.com/billing/freetrial?hl=en
4. Create a new project
https://goo.gl/1sqOrk
@Laura_Morillo

4. @Laura_Morillo

5. Node.js
@Laura_Morillo

6. Node.js
@Laura_Morillo

7. Docker OOP Simile
Image
Container
Class
Instance
@Laura_Morillo

8. Dockerfile
@Laura_Morillo

9. Dockerfile
@Laura_Morillo

10. Dockerfile
Docker Repository
(images)
@Laura_Morillo

11. Node.js
Container for Staging Container for Production
Dockerfile
Docker Repository
(images)
(containers)
@Laura_Morillo

12. Node.js
Redis
Loadbalancer
Node.js
Loadbalancer
Node.js
Redis Redis
@Laura_Morillo

13. Pokemon Go traffic
@Laura_Morillo

14. @Laura_Morillo

15. Kubernetes: cluster
Cluster
Node 1
(VM or physical
machine)
Node 2
(VM or physical
machine)
Node 3
(VM or physical
machine)
@Laura_Morillo

16. Creating our cluster!
● While creating the cluster a zone is required. Execute this first:
○ gcloud config set compute/zone europe-west1-d
https://goo.gl/1sqOrk
@Laura_Morillo

17. Pods
Node.js
Redis
@Laura_Morillo
Volumes
● Smallest unit
● Contains one or more containers
● Ephemeral entities
● One IP per pod
● Volumes for persistence
● You shouldn’t create them
directly

18. Deployments
● Drive current state toward
desired state
V1
V1
@Laura_Morillo

19. Deployments
@Laura_Morillo

20. Deployments
Cluster
Node 1
Node 2
Node 3
@Laura_Morillo

21. Deployments
Redis
V1
My
Image
V1
Redis
V1
My
Image
V1
Cluster
Node 1
Node 2
Node 3
@Laura_Morillo

22. Deployments
Redis
V1
My
Image
V1
Redis
V1
My
Image
V1
Cluster
Node 1
Node 2
Node 3
@Laura_Morillo

23. Services
● Defines a logical set of pods
and a policy to access them
Redis
V1
My
Image
V1
Redis
V1
My
Image
V1
Nginx V1
Service
@Laura_Morillo

24. Services: ClusterIP
@Laura_Morillo

25. Services: ClusterIP
Redis
V1
My
Image
V1
Redis
V1
My
Image
V1
Cluster
Node 1
Node 2
Nginx
V1
my-node-app-service
nginx-service
@Laura_Morillo

26. Services: ClusterIP
Redis
V1
My
Image
V1
Redis
V1
My
Image
V1
Cluster
Node 1
Node 2
Nginx
V1
Error!
my-node-app-service
nginx-service
@Laura_Morillo

27. @Laura_Morillo
Services: NodePort

28. Services: NodePort
Redis
V1
My
Image
V1
Redis
V1
My
Image
V1
Cluster
Node 1
Node 2
Nginx
V1
NodePort
Port: 31128
nginx-service
NodePort
Port: 31128
Node1_IP:31128
Node2_IP:31128
@Laura_Morillo

29. Services: LoadBalancer
Public IP:
Ej: 123.45.678.9
@Laura_Morillo

30. Services: LoadBalancer
Redis
V1
My
Image
V1
Redis
V1
My
Image
V1
Cluster
Node 1
Node 2
Nginx
V1
IP: 123.45.678.9
my-node-app-service
nginx-service
@Laura_Morillo

31. Changes????
@Laura_Morillo

32. Deployments
● Controls new versions
● Rollback to previous versions
● We set the pod information,
amount of pods, update
strategy...
V1
V2
Deployment
@Laura_Morillo

33. Deployments: RollingUpdate
@Laura_Morillo

34. Deployments: RollingUpdate
Redis V1
My Image V1
Redis V1
My Image V1
@Laura_Morillo

35. Deployments: RollingUpdate
@Laura_Morillo

36. Deployment: RollingUpdate
Redis
V1
My Image
V1
Redis
V1
My Image
V1
@Laura_Morillo

37. Deployment: RollingUpdate
Redis
V1
My Image
V1
Redis
V1
My Image
V1
Redis
V1
My Image
V2
@Laura_Morillo

38. Deployment: RollingUpdate
Redis
V1
My Image
V1
Redis
V1
My Image
V1
Redis
V1
My Image
V2
@Laura_Morillo

39. Deployment: RollingUpdate
Redis
V1
My Image
V1
Redis
V1
My Image
V1
Redis
V1
My Image
V2
Redis
V1
My Image
V2
@Laura_Morillo

40. Deployment: RollingUpdate
Redis
V1
My Image
V1
Redis
V1
My Image
V1
Redis
V1
My Image
V2
Redis
V1
My Image
V2
@Laura_Morillo

41. Pokemon Go traffic
@Laura_Morillo

42. HorizontalPodAutoscaler
● Scales the number of pods
from a deployment
● At the moment, only based
on the CPU utilizationRedis
V1
My
Image
V2
HorizontalPodAutoescaler: From 2 to 10
Redis
V1
My
Image
V2
Min 2
Redis
V1
My
Image
V2
Max 10
1 2 10
@Laura_Morillo

43. HorizontalPodAutoscaler
@Laura_Morillo

44. Summary
● Kubernetes is a cluster manager that helps us to:
○ Deploy our applications from Docker containers
○ Structure our application with microservices
○ Connect the different microservices
○ Provide external access to our services
○ Scale our infrastructure when we need it
○ And more!
@Laura_Morillo

45. Extra notes
● For steps 9 and 10 curl should be executed from your console, not from
Google Console.
● Step 12 commands should be:
○ cat deployments/auth.yaml
○ kubectl create -f deployments/auth.yaml
● Delete: Google Cloud Menu => Networking => Load Balancing
https://goo.gl/1sqOrk
@Laura_Morillo

46. @laura_morillo
laura.morillovelarde@gmail.com
We are hiring at seedtag!
@Laura_Morillo