Easy Microservices with Kubernetes and Istio

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@sendilkumarn Hallo Nederland!!!

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@sendilkumarn Easy microservices with Kubernetes & Istio

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@sendilkumarn

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@sendilkumarn Sendil Kumar

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@sendilkumarn

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@sendilkumarn

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@sendilkumarn Senior Software Engineer @uber

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@sendilkumarn Passionate about Open Source Senior Software Engineer @uber

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

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@sendilkumarn What about you? µ µ

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

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@sendilkumarn are awesome Monoliths

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@sendilkumarn are simple Monoliths

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@sendilkumarn are faster* Monoliths

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@sendilkumarn reduces reliability Monoliths

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@sendilkumarn reduces scalability Monoliths

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@sendilkumarn updates takes longer Monoliths

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@sendilkumarn tied to one tech. stack Monoliths

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@sendilkumarn µ µ

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@sendilkumarn Why µ µ

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@sendilkumarn Scalability µ µ

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@sendilkumarn Respond faster µ µ

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@sendilkumarn Technology Heterogeneity µ µ

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@sendilkumarn Fault isolation

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@sendilkumarn Granular Scaling

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@sendilkumarn But…

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@sendilkumarn ❌ ❌ ❌ ❌ ❌ ❌ ❌ ❌ ❌

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@sendilkumarn Store Gateway Notification Invoice Product

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

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

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@sendilkumarn Start with Monoliths before embarking microservices journey…

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@sendilkumarn

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

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@sendilkumarn Docker

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@sendilkumarn Docker Self Contained images

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@sendilkumarn Docker Self Contained images Portability

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@sendilkumarn Docker Managing the infrastructure

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

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@sendilkumarn Kubernetes

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@sendilkumarn K8s is an open-source system

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

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

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

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@sendilkumarn De-coupled infrastructure completely Kubernetes

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@sendilkumarn • Infrastructure • Manage lifecycle • Routing

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@sendilkumarn K8s makes it easy and simple

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@sendilkumarn But K8s itself is not simple

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@sendilkumarn How works? Kubernetes

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@sendilkumarn Cluster mode

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@sendilkumarn Kubernetes Master Nodes Nodes Nodes

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@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

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@sendilkumarn Api Server etcd Scheduler Controller Kubernetes Land Control Plane

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

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

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

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@sendilkumarn But…

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@sendilkumarn Store Gateway Notification Invoice Product

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

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@sendilkumarn S P N I

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

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@sendilkumarn

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@sendilkumarn Harder to control

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@sendilkumarn Harder to Manage

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@sendilkumarn Harder to Secure

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@sendilkumarn Istio

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@sendilkumarn Service mesh

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@sendilkumarn network of inter connected microservices

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@sendilkumarn Control Connect Secure Observe

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@sendilkumarn Service A Service B Service C

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@sendilkumarn Service A Service B Service C Logging Monitoring Networking

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@sendilkumarn Service A Service B Service C Common Services…

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@sendilkumarn Without any changes in your services

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@sendilkumarn Pod in k8s?

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@sendilkumarn App PROXY Envoy proxy

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

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@sendilkumarn App PROXY Mixer Policy control Telemetry collection

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@sendilkumarn App PROXY Mixer Control Plane

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

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

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

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@sendilkumarn S P N I

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@sendilkumarn S P N I

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

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@sendilkumarn

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

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

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

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@sendilkumarn ~70% test coverage PWA Deployments Best practices

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@sendilkumarn Microservices with JHipster

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@sendilkumarn API Gateway BFF Pattern

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@sendilkumarn Java / Kotlin backend Zuul UAA

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@sendilkumarn Java / Kotlin backend Zuul UAA Microservices Gateway

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@sendilkumarn Service Registry

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@sendilkumarn JHipster Registry Consul

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@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

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@sendilkumarn Consoles

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@sendilkumarn Elasticsearch Logstash Kibana JHipster Console

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@sendilkumarn Consul / JHipster Registry Console Microservices Gateway Microservices

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@sendilkumarn We will generate…

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@sendilkumarn Store Gateway Notification Invoice Product

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@sendilkumarn JHipster demo time

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@sendilkumarn • Kubernetes + Istio configuration • Running in GCloud

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

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

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

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@sendilkumarn Healthy - Zombie TIP

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

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

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

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@sendilkumarn Think about Requests / Limits TIP

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@sendilkumarn Clean up unused resources TIP

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@sendilkumarn Monitor and tune TIP

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@sendilkumarn Don’t violate DRY inside microservice. TIP

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