Easy Microservices with Kubernetes and Istio

@sendilkumarn Hallo Nederland!!!

@sendilkumarn Easy microservices with Kubernetes & Istio

@sendilkumarn

@sendilkumarn Sendil Kumar

@sendilkumarn

@sendilkumarn Senior Software Engineer @uber

@sendilkumarn Passionate about Open Source Senior Software Engineer @uber

@sendilkumarn Passionate about Open Source Senior Software Engineer @uber Team
member @JHipster

@sendilkumarn What about you? µ µ

@sendilkumarn Why Microservices? Kubernetes JHipster Istio Best practices with K8s
& Istio Agenda

@sendilkumarn are awesome Monoliths

@sendilkumarn are simple Monoliths

@sendilkumarn are faster* Monoliths

@sendilkumarn reduces reliability Monoliths

@sendilkumarn reduces scalability Monoliths

@sendilkumarn updates takes longer Monoliths

@sendilkumarn tied to one tech. stack Monoliths

@sendilkumarn µ µ

@sendilkumarn Why µ µ

@sendilkumarn Scalability µ µ

@sendilkumarn Respond faster µ µ

@sendilkumarn Technology Heterogeneity µ µ

@sendilkumarn Fault isolation

@sendilkumarn Granular Scaling

@sendilkumarn But…

@sendilkumarn ❌ ❌ ❌ ❌ ❌ ❌ ❌ ❌ ❌

@sendilkumarn Store Gateway Notification Invoice Product

@sendilkumarn S P N I Load balancer Replicate Backup Load
balancer Load balancer Load balancer OS Container Runtime Hardware Virtualisation

@sendilkumarn Start with Monoliths before embarking microservices journey…

@sendilkumarn

& Istio Agenda

@sendilkumarn Docker

@sendilkumarn Docker Self Contained images

@sendilkumarn Docker Self Contained images Portability

@sendilkumarn Docker Managing the infrastructure

@sendilkumarn Docker Managing the infrastructure Deciding when and how to
run the applications

@sendilkumarn Kubernetes

@sendilkumarn K8s is an open-source system

@sendilkumarn K8s is an open-source system that automates deployment containerised
applications

@sendilkumarn K8s is an open-source system that automates deployment scales
(up/down/in/out) Containerised applications

@sendilkumarn K8s is an open-source system that automates deployment scales
(up/down/in/out) manages Containerised applications

@sendilkumarn De-coupled infrastructure completely Kubernetes

@sendilkumarn • Infrastructure • Manage lifecycle • Routing

@sendilkumarn K8s makes it easy and simple

@sendilkumarn But K8s itself is not simple

@sendilkumarn How works? Kubernetes

@sendilkumarn Cluster mode

@sendilkumarn Kubernetes Master Nodes Nodes Nodes

@sendilkumarn kubectl apply -f some.yml Api Server etcd Scheduler Controller
create yaml file connects via CLI adds to the queue stores sends to the controller Kubernetes Land

@sendilkumarn Api Server etcd Scheduler Controller Kubernetes Land Control Plane

@sendilkumarn Worker Node signals to start the deployment Kubelet Kubelet
Kubelet Worker Node Kubelet Kubelet Kubelet Worker Node Kubelet Kubelet Kubelet Scheduler

@sendilkumarn handles networking Worker Node Kubelet Kube proxy Kubelet Kube
proxy Kubelet Kube proxy Kubelet Kube proxy

@sendilkumarn K8s states the (desired) running state of application

@sendilkumarn But…

@sendilkumarn S P N I Load balancer Replicate Backup Load
balancer Load balancer Load balancer OS Container Runtime Hardware Virtualisation

@sendilkumarn S P N I

& Istio Agenda

@sendilkumarn

@sendilkumarn Harder to control

@sendilkumarn Harder to Manage

@sendilkumarn Harder to Secure

@sendilkumarn Istio

@sendilkumarn Service mesh

@sendilkumarn network of inter connected microservices

@sendilkumarn Control Connect Secure Observe

@sendilkumarn Service A Service B Service C

@sendilkumarn Service A Service B Service C Logging Monitoring Networking

@sendilkumarn Service A Service B Service C Common Services…

@sendilkumarn Without any changes in your services

@sendilkumarn Pod in k8s?

@sendilkumarn App PROXY Envoy proxy

@sendilkumarn Envoy proxy Lightweight c++ protocol Platform-agnostic Network abstraction

@sendilkumarn App PROXY Mixer Policy control Telemetry collection

@sendilkumarn App PROXY Mixer Control Plane

@sendilkumarn Control Plane App PROXY Mixer Pilot Galley Citadel Service
discovery Validate, process & distribute Authentication

@sendilkumarn Control Plane App PROXY Mixer Pilot Galley Citadel Service
discovery Validate, process & distribute Authentication Data plane

@sendilkumarn Control Plane App PROXY Mixer Pilot Galley Citadel Control
Connect Secure Observe

@sendilkumarn S P N I

& Istio Agenda

@sendilkumarn

@sendilkumarn npm i -g generator-jhipster mkdir awesome-app !&& cd awesome-app
jhipster

@sendilkumarn ~70% test coverage PWA Deployments Best practices

@sendilkumarn Microservices with JHipster

@sendilkumarn API Gateway BFF Pattern

@sendilkumarn Java / Kotlin backend Zuul UAA

@sendilkumarn Java / Kotlin backend Zuul UAA Microservices Gateway

@sendilkumarn Service Registry

@sendilkumarn JHipster Registry Consul

@sendilkumarn JHipster Registry Consul Eureka + Spring Cloud Config Admin
Server Easier in multi-node cluster Availability over consistency Consistency over Availability - All nodes provide correct detail every time

@sendilkumarn Consoles

@sendilkumarn Elasticsearch Logstash Kibana JHipster Console

@sendilkumarn Consul / JHipster Registry Console Microservices Gateway Microservices

@sendilkumarn We will generate…

@sendilkumarn JHipster demo time

@sendilkumarn • Kubernetes + Istio configuration • Running in GCloud

& Istio Agenda

@sendilkumarn Single Responsibility Principle Smaller YAML files Split the files
TIP

@sendilkumarn Smaller image sizes Alpine images for the win Faster
to boot TIP

@sendilkumarn Healthy - Zombie TIP

@sendilkumarn Single process in a container… Docker don’t know which
process crashed TIP

@sendilkumarn Services - RED pattern Requests - Errors - Duration
pattern RED TIP

@sendilkumarn Resources - USE pattern Utilization - Saturation - Errors
pattern TIP

@sendilkumarn Think about Requests / Limits TIP

@sendilkumarn Clean up unused resources TIP

@sendilkumarn Monitor and tune TIP

@sendilkumarn Don’t violate DRY inside microservice. TIP

@sendilkumarn Dank je wel… Code : github.com/sendilkumarn Deck : speakerdeck.com/sendilkumarn
Twitter: @sendilkumarn Vragen…

Easy Microservices with Kubernetes and Istio

Easy Microservices with Kubernetes and Istio

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