Cache first cloud native microservices
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This document discusses caching patterns for microservices deployed on Kubernetes using Hazelcast. It introduces Hazelcast and its products, explains why distributed caching is useful, and covers four common caching patterns - embedded, sidecar, proxy cache, and client-server. It also provides guidance on deploying Hazelcast on Kubernetes using Helm charts, operators, and Hazelcast Cloud. Finally, it covers day 2 operations like scaling, rolling upgrades, and monitoring Hazelcast clusters on Kubernetes.
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Cache first cloud native microservices
- 1. @mesutcelik Cache First Cloud-Native Microservices Mesut Celik,Hazelcast
- 2. @mesutcelik Mesut Celik ● Tech Lead @Hazelcast ● Java Developer ● lived in Turkey,Belgium,US ● Twitter: @mesutcelik
- 3. @mesutcelik Agenda ● Hazelcast Introduction ● Caching Patterns ● Kubernetes Deployments ● Day 2 Operations
- 4. @mesutcelik Hazelcast Products ● Hazelcast IMDG ● Hazelcast Jet ● Hazelcast Cloud ● Management Center Hazelcast is an Open Source Company ● Apache 2 License ● Remote friendly ● raised $21M series C ● Always hiring!!!!
- 5. @mesutcelik Why Distributed Cache? ● Cache, Memory is faster than storage ● Distributed,Natural fit for Cloud-Native Deployments
- 8. @mesutcelik Hazelcast and Kubernetes Caching Patterns
- 9. @mesutcelik Distributed Caching Patterns in Kubernetes ● Embedded ● Sidecar ● Proxy Cache ● Client-Server
- 10. @mesutcelik POD Spring Boot Microservice Hazelcast Member POD Hazelcast ClusterKubernetesService Http Request Embedded Spring Boot Microservice Hazelcast Member Kubernetes Cluster
- 11. @mesutcelik Embedded ● Simple ● Java only ● Data co-located with Microservice JVM
- 12. @mesutcelik Python Microservice POD Hazelcast Member Python Microservice POD Hazelcast Member Hazelcast ClusterKubernetesService Http Request SideCar Kubernetes Cluster hazelcast-client hazelcast-client
- 13. @mesutcelik Sidecar ● Simple ● Multiple Programming Languages ○ Java, Node.js, .NET, Python, Golang ● Data co-located with Microservice POD
- 14. hazelcast-proxy sidecar POD Spring Boot Application POD Spring Boot Application Hazelcast ClusterKubernetesService Http Request Http reverse proxy caching Hazelcast Member hazelcast-proxy sidecar Hazelcast Member Kubernetes Cluster
- 15. Http reverse proxy caching ● Injecting Cache into every microservice ● No coupling with any Cache API ● Enabled w/o code change
- 16. @mesutcelik POD Spring Boot Microservice hazelcast-java-client Hazelcast ClusterKubernetesService Http Request Client Server POD Hazelcast Member POD Hazelcast Member Kubernetes Cluster POD Spring Boot Microservice hazelcast-java-client POD ASP.NET Core Microservice hazelcast-dotnet-client KubernetesService Http Request
- 17. @mesutcelik POD KubernetesService Http Request Hazelcast Cloud POD cloud.hazelcast.com Hazelcast Cluster Kubernetes Cluster Spring Boot Application hazelcast-client Spring Boot Application hazelcast-client
- 18. @mesutcelik Client Server ● CaaS - Cache as a Service ● Multiple Programming Languages ○ Java, nodejs, .NET, Python, Golang ● Separate Hazelcast Cluster Maintenance
- 19. @mesutcelik Kubernetes Deployment Options For Hazelcast
- 20. @mesutcelik Hazelcast Helm Chart $ helm install stable/hazelcast
- 21. @mesutcelik Hazelcast Kubernetes Operator ● OperatorHub.io ● Openshift 4 Operator Catalog ● IBM Cloud Private
- 22. @mesutcelik Hazelcast Cloud ● Managed Service ● Pay as you go model ● https://cloud.hazelcast.com
- 24. @mesutcelik Predictable Resource Allocation ● Calculate CPU/Memory Requirements ● Set Resource Request and Limits as the same value
- 25. @mesutcelik Pod Anti-Affinity ● Hazelcast per K8S Node ● Large Kubernetes Clusters ● Safer in Node crushes
- 26. @mesutcelik Multi-zone Deployment with ZONE_AWARE hazelcast-member -1 hazelcast-member -2 hazelcast-member -3 Availability-Zone-A hazelcast-member -4 hazelcast-member -5 hazelcast-member -6 Availability-Zone-B Multi-zone Hazelcast Cluster * Multi-zone if your architecture prefers availability over performance
- 28. @mesutcelik Scaling Hazelcast Cluster ● Manual Scaling (kubectl scale or helm upgrade) ● Horizontal Pod Autoscaler (HPA) ● Vertical Pod Autoscaler ● Cluster Autoscaler
- 29. @mesutcelik Rolling Upgrade - Why? ● Hazelcast Version Update ● Config Change ● Adding Jar to the classpath
- 30. @mesutcelik Rolling Upgrade - How? ● helm upgrade (--set image.tag) ● kubectl set image ● StatefulSet ● Deployment with RollingUpdateStrategy ● Enable Graceful Shutdown ● Optimized Grace Period
- 31. @mesutcelik Monitoring ● Hazelcast Management Center ● Metrics via Prometheus ● Alerting
- 32. @mesutcelik Thank you! ● https://twitter.com/mesutcelik ● https://github.com/mesutcelik ● https://www.linkedin.com/in/mesutcelik/