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