Introduce Microservice & Infrastructure on Cloud

This article will introduce Microservice & Infrastructure on Cloud.

• Infrastructure on Cloud
  • Iaas & Paas & Saas
  • Virtual Machine & Container
  • Docker & Kubernetes
  • Most Basic Architecture
  • Azure Kubernets Service - AKS

Iaas & Paas & Saas

• Infrastructure-as-a-service
• Platform-as-a-service
• Software-as-a-service

https://www.sherweb.com/blog/cloud-server/what-is-azure-paas/

Virtual Machine & Container

Virtual Machine: Traditional development & deployment，such as IIS & tomcat

Container:

1. Platform independence: Build it once, run it anywhere
2. Resource efficiency and density
3. Effective isolation and resource sharing
4. Speed: Start, create, replicate or destroy containers in seconds
5. Immense and smooth scaling
6. Operational simplicity
7. Improved developer productivity and development pipeline
8. Language independence

Docker & Kubernetes

Docker is the popular way which implement container. Other way ex. Azure Service Fabric, Amazon Elastic Container Service

Why use k8s:

1. Container orchestration
2. Great for multi-cloud adoption
3. Deploy and update applications at scale for faster time-to-market (Horizontal auto scaling，Rolling updates，Canary deployments)
4. Laying the foundation for cloud-native apps
5. Lower infrastructure costs
6. It can run on-premise or in a hybrid environment.
7. You can move a Kubernetes cluster from one hosting vendor to another without changing (almost) any of the deployment and management processes.
8. Zero-downtime deployments, fault tolerance, high availability, scaling, scheduling, and self-healing add significant value in Kubernetes.

Most Basic Architecture

• Service Registration
• Service Discovery
• Monitoring
• Traffic Limit
• Routing
• Load Balance
• Timeout/Retry
• Circuit Breaking (熔断)
• Service Downgrade
• Failover

Azure Kubernets Service -AKS

1. The First Stage

Build application as normal way - Introduce Cloud Native Information

Pod, Node, Replication Controller, Service, Namespace, Ingress, Gateway(Nginx)…

2. Use Third Party Components to Improve The System

1. Helm,
2. Traefik,
   
3. Kubeapps,
   
4. Prometheus,
5. Grafana,
   

3. Use Service Mesh (Istio) for Micro Service Management

1. Gateway & Virtual Service

2. Cert

3. Kiali & Grafana
   

4. Use CI/CD to deploy your apps.

   1. Azure DevOps
   2. Scaling
   3. Intelligent Routing and Canary Releases
      https://docs.microsoft.com/en-us/azure/aks/servicemesh-istio-scenario-routing?pivots=client-operating-system-linux

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