Migration 101: From VMs to Kubernetes

In this hands-on tutorial, you will learn how to progressively adopt Kubernetes by migrating one of your apps from VMs onto Kubernetes. You will perform the full migration process: from preparing your app for running in Kubernetes, to configuring routing, to performing a no-downtime migration and monitoring your app.

We will cover:

- Dockerizing your app
- Creating a Kubernetes YAML spec
- Deployments

Video: https://www.youtube.com/watch?v=MuX3m149FpI
- Configuring routing between K8s and VMs and discussing different topologies including using Consul
- Performing a no-downtime migration from VMs to K8s
- Viewing application logs with Fluentd, Elasticsearch and Kibana
- Viewing application metrics with Prometheus and Grafana
- Consul Service Mesh

Workshop Instructions: https://github.com/ishustava/kubecon-2020-workshop

Presented at KubeCon North America by Iryna Shustava and Luke Kysow from HashiCorp

Transcript

1. Migration 101: From VMs to Kubernetes Iryna Shustava Luke Kysow Copyright © 2020 HashiCorp
2. The Plan web api Kube web api api Kube web api
3. Agenda ▪ Introduction ▪ Building a Docker Image ▪ Deploying to Kubernetes ▪ Configuring Routing ▪ Configuring Logging and Metrics ▪ Performing A No Downtime Migration ▪ Consul Service Mesh
4. Prerequisites github.com/ishustava/kubecon-2020-workshop
5. Kubernetes Adoption - New Application web api Kube foo web api
6. Kubernetes Adoption - Migration web api Kube web api api Kube web api
7. Initial Setup
8. local machine web api web – 127.0.0.1:8080 api - 127.0.0.1:80 (http://api) Our Browser
10. web web web api api api
11. web web web api api api Load Balancer web.company.com 10.0.0.1 10.0.0.2 10.0.0.3 api.company.com 10.0.0.4 10.0.0.5 10.0.0.6
12. Workshop Step 1
13. Agenda ▪ Introduction ▪ Building a Docker Image ⇐ ▪ Deploying to Kubernetes ▪ Configuring Routing ▪ Configuring Logging and Metrics ▪ Performing A No Downtime Migration ▪ Consul Service Mesh
14. Dockerizing
15. web web web api api api
16. web api web api bar foo foo bar
17. https://blog.jayway.com/2015/03/21/a-not-very-short-introduction-to-docker/
18. Workshop Step 2
19. Agenda ▪ Introduction ▪ Building a Docker Image ▪ Deploying to Kubernetes ⇐ ▪ Configuring Routing ▪ Configuring Logging and Metrics ▪ Performing A No Downtime Migration ▪ Consul Service Mesh
20. Kubernetizing
21. pod pod pod pod pod pod pod pod
22. pod pod pod pod pod web web pod deployment
23. pod pod pod pod pod web web pod deployment
24. pod pod pod pod pod web pod deployment
25. pod pod pod pod pod web pod deployment web
26. Workshop Step 3
27. local machine web api web – 127.0.0.1:8080 api - 127.0.0.1:80 (http://api) Our Browser kind api
28. web web web api api api Load Balancer web.company.com 10.0.0.1 10.0.0.2 10.0.0.3 api.company.com 10.0.0.4 10.0.0.5 10.0.0.6 Kubernetes api
29. Agenda ▪ Introduction ▪ Building a Docker Image ▪ Deploying to Kubernetes ▪ Configuring Routing ⇐ ▪ Configuring Logging and Metrics ▪ Performing A No Downtime Migration ▪ Consul Service Mesh
30. Routing
31. web web web api api api Load Balancer web.company.com 10.0.0.1 10.0.0.2 10.0.0.3 api.company.com 10.0.0.4 10.0.0.5 10.0.0.6
32. Exposing a Service Externally In Kubernetes ▪ Services – ClusterIP: works only inside the cluster – NodePort: works only if your can reach Kubernetes nodes externally – LoadBalancer: depends on your cloud provider ▪ Ingress – Can expose HTTP routes outside the cluster – A single load balancer for many services
33. local machine web api web – 127.0.0.1:8080 api - 127.0.0.1:80 (http://api) Our Browser kind api
34. local machine web api 127.0.0.1:80 Our Browser nginx ::1:80 api
35. Workshop Step 4
36. local machine web api 127.0.0.1:80 Our Browser api nginx ::1:80
37. Agenda ▪ Introduction ▪ Building a Docker Image ▪ Deploying to Kubernetes ▪ Configuring Routing ▪ Configuring Logging and Metrics ⇐ ▪ Performing A No Downtime Migration ▪ Consul Service Mesh
38. Workshop Step 5
39. Logging
40. Metrics
41. Workshop Step 6
42. Agenda ▪ Introduction ▪ Building a Docker Image ▪ Deploying to Kubernetes ▪ Configuring Routing ▪ Configuring Logging and Metrics ▪ Performing A No Downtime Migration ⇐ ▪ Consul Service Mesh
43. No Downtime Migration
44. local machine web api 127.0.0.1:80 Our Browser api nginx ::1:80 http://api => 127.0.0.1
45. local machine web api 127.0.0.1:80 Our Browser api nginx ::1:80 http://api => ::1
46. web web web api api api Load Balancer web.company.com 10.0.0.1 10.0.0.2 10.0.0.3 api.company.com 10.0.0.4 10.0.0.5 10.0.0.6 api nginx 10.15.0.0
47. web web web api api api Load Balancer web.company.com 10.0.0.1 10.0.0.2 10.0.0.3 api.company.com 10.15.0.0 api nginx 10.15.0.0
48. Workshop Step 7
49. Recap ▪ Introduction ▪ Building a Docker Image ▪ Deploying to Kubernetes ▪ Configuring Routing ▪ Configuring Logging and Metrics ▪ Performing A No Downtime Migration ▪ Consul Service Mesh
50. Things To Think About ▪ Keep it simple ▪ Kubernetes Ecosystem Tooling ▪ Security
51. Consul Service Mesh
52. local machine web Our Browser api nginx ::1:80
53. local machine web Our Browser api consul ::1:80
54. Workshop Step 8
55. @shustava @lkysow