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Kubernetes at Scale:
Going Multi-Cluster
with Istio
Divine Odazie
DevOpsDays Houston 2024
Jubril Oyetunji
2
2
Divine Odazie
● Technology Evangelist
at Severalnines
● Electrical/Electronics Engineering
● Certified Kubernetes Application
Developer (CKAD)
● Certified AWS Solutions
Architect
● Excited to speak at DevOpsDays
Houston 2024!!
Control Your Data
3
3
Jubril Oyetunji
● Independent Software
Engineer & Technical Writer
● Loves making Terraform
providers
● Dabbles in IOT
● Excited to speak at
DevOpsDays Houston 2024!!
Control Your Data
4
1. What is Multi-Cluster?
2. What is a Service Mesh?
3. Why Multi-Cluster?
4. Demo: Multi-Cluster with Istio
5. Challenges with multi-cluster
Control Your Data
5
What is Multi-Cluster?
Multi-cluster Kubernetes is exactly what it
sounds like.
It refers to an architecture that distributes
applications and data in two or more
Kubernetes clusters.
Control Your Data
6
Service mesh
A service mesh is a dedicated infrastructure
layer that facilitates service-to-service
communication.
It provides traffic management, security,
observability, without any code changes
Control Your Data
7
Istio service mesh
● “Istio” is Greek for sail
● Built on top of Envoy proxy
● CNCF graduated project
● Secure service-to-service
communication
● Load balancing for various traffic
types
● Fine-grained traffic control & routing
● Policy layer for access, rate limits &
quotas, etc.
Control Your Data
8
Why
Multi-Cluster?
Control Your Data
9
Disaster recovery
A multi-cluster set up can significantly
enhance your disaster recovery capabilities
by distributing your workloads across
geographically dispersed clusters.
Istio specifically has the concept of failovers
to help migrate traffic from a failing cluster.
Control Your Data
10
Localization
Multi-Cluster can be useful for delivering you
applications closer to your users. This can
help you:
- Reduce latency
- Improve response times
Control Your Data
11
Kubernetes upgrades
With Multi-Cluster you can experiment
with different versions of Kubernetes in a
controlled fashion.
Control Your Data
Public Cloud Co-Location On-Premises
12
12
A/B Testing
Targeted Rollouts with Traffic Splitting
Deploy different application versions (A/B) to
specific clusters within the multi-cluster mesh.
Istio routes traffic percentages to each version
for controlled testing
Built-in monitoring capabilities to gather data on
user behavior and application performance for
both versions
Control Your Data
13
Multi-Cloud/Hybrid Environments
Flexibility and Cost Optimization
● Utilize the strengths of different
cloud providers for specific
workloads.
● Potentially achieve better pricing
by avoiding vendor lock-in.
Leverage Existing Infrastructure
● Integrate on-prem workloads with
cloud deployments for a hybrid
approach.
● Migrate workloads to the cloud at
your own pace.
Control Your Data
14
14
Going
Multi-Cluster
with Istio
Service Mesh
Control Your Data
15
15
Prerequisites
Two Kubernetes clusters
Istioctl – Istio’s configuration
command line utility
Istio Repo
Control Your Data
16
Control Your Data
17
Multi-Cluster setup
Control Your Data
Install Istio
1 2 3
Install the east-west gateway Deploy your services
18
Control Your Data
19
19
Challenges with
Multi-Cluster
● Cost
● Can be painful at times
● Increased deployment complexity
Control Your Data
20
Tech Evangelist @ Severalnines
Divine Odazie
@_Odazie
Independent Software Engineer
Jubril Oyetunji
@s1ntaxe770r

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Kubernetes at Scale: Going Multi-Cluster with Istio

  • 1. 1 Kubernetes at Scale: Going Multi-Cluster with Istio Divine Odazie DevOpsDays Houston 2024 Jubril Oyetunji
  • 2. 2 2 Divine Odazie ● Technology Evangelist at Severalnines ● Electrical/Electronics Engineering ● Certified Kubernetes Application Developer (CKAD) ● Certified AWS Solutions Architect ● Excited to speak at DevOpsDays Houston 2024!! Control Your Data
  • 3. 3 3 Jubril Oyetunji ● Independent Software Engineer & Technical Writer ● Loves making Terraform providers ● Dabbles in IOT ● Excited to speak at DevOpsDays Houston 2024!! Control Your Data
  • 4. 4 1. What is Multi-Cluster? 2. What is a Service Mesh? 3. Why Multi-Cluster? 4. Demo: Multi-Cluster with Istio 5. Challenges with multi-cluster Control Your Data
  • 5. 5 What is Multi-Cluster? Multi-cluster Kubernetes is exactly what it sounds like. It refers to an architecture that distributes applications and data in two or more Kubernetes clusters. Control Your Data
  • 6. 6 Service mesh A service mesh is a dedicated infrastructure layer that facilitates service-to-service communication. It provides traffic management, security, observability, without any code changes Control Your Data
  • 7. 7 Istio service mesh ● “Istio” is Greek for sail ● Built on top of Envoy proxy ● CNCF graduated project ● Secure service-to-service communication ● Load balancing for various traffic types ● Fine-grained traffic control & routing ● Policy layer for access, rate limits & quotas, etc. Control Your Data
  • 9. 9 Disaster recovery A multi-cluster set up can significantly enhance your disaster recovery capabilities by distributing your workloads across geographically dispersed clusters. Istio specifically has the concept of failovers to help migrate traffic from a failing cluster. Control Your Data
  • 10. 10 Localization Multi-Cluster can be useful for delivering you applications closer to your users. This can help you: - Reduce latency - Improve response times Control Your Data
  • 11. 11 Kubernetes upgrades With Multi-Cluster you can experiment with different versions of Kubernetes in a controlled fashion. Control Your Data Public Cloud Co-Location On-Premises
  • 12. 12 12 A/B Testing Targeted Rollouts with Traffic Splitting Deploy different application versions (A/B) to specific clusters within the multi-cluster mesh. Istio routes traffic percentages to each version for controlled testing Built-in monitoring capabilities to gather data on user behavior and application performance for both versions Control Your Data
  • 13. 13 Multi-Cloud/Hybrid Environments Flexibility and Cost Optimization ● Utilize the strengths of different cloud providers for specific workloads. ● Potentially achieve better pricing by avoiding vendor lock-in. Leverage Existing Infrastructure ● Integrate on-prem workloads with cloud deployments for a hybrid approach. ● Migrate workloads to the cloud at your own pace. Control Your Data
  • 15. 15 15 Prerequisites Two Kubernetes clusters Istioctl – Istio’s configuration command line utility Istio Repo Control Your Data
  • 17. 17 Multi-Cluster setup Control Your Data Install Istio 1 2 3 Install the east-west gateway Deploy your services
  • 19. 19 19 Challenges with Multi-Cluster ● Cost ● Can be painful at times ● Increased deployment complexity Control Your Data
  • 20. 20 Tech Evangelist @ Severalnines Divine Odazie @_Odazie Independent Software Engineer Jubril Oyetunji @s1ntaxe770r