Kubernetes Infra Proposal

Kubernetes Cluster

• Utilize Rancher for installing and maintaining a Kubernetes cluster (simplifies Kubernetes management, providing a user-friendly interface for cluster setup and maintenance.)

• Configure 3 master nodes and 5 worker nodes (Having 3 master nodes ensures high availability and fault tolerance, while 5 worker nodes support workload distribution and scalability)

• Implement a cluster of load balancers to balance traffic between worker nodes.(enhance performance by evenly distributing traffic and preventing overload on individual nodes.)

• Isolate the Kubernetes cluster from the internet, with separate networks for internal and external access for load balancers.

Nexus Deployment

• Image and Chart Repository: Nexus centralizes image and chart storage, improving deployment speed and reliability.

• apt Repository

• Secure Image Retrieval: By downloading images and packages from Nexus, we ensure consistency, security, and control over dependencies.

ArgoCD Implementation

• Continuous Deployment: ArgoCD automates application deployment, reducing manual errors and enabling rapid releases.

• Implement GitOps flow using a self-hosted GitLab instance to manage source code and pipelines for creating and pushing Docker images to Nexus.

Longhorn Setup

• Persistent Storage: Longhorn provides reliable storage for applications, ensuring data persistence and availability.

• Backup Strategy: Implementing backups in Longhorn safeguards against data loss and supports disaster recovery efforts.

Security Measures

• Deploy an HTTP proxy server at the edge layer with dual networks to route egress traffic to external services like Arvan Cloud. (The HTTP proxy server controls outbound traffic, ensuring secure communication with external services and preventing unauthorized access.)

• Edge Server Hardening: Securing edge servers mitigates external threats and protects sensitive data and services.

Additional Components

• Kafka Cluster: Kafka facilitates real-time data processing, supporting microservices architecture and enabling scalable, fault-tolerant messaging.

• Redis Cluster: Redis enhances application performance by caching frequently accessed data in memory, reducing latency and improving responsiveness.

Rationale for Decisions

• Security: Isolating the Kubernetes cluster and hardening edge servers enhances security by limiting external access.

• Reliability: Using Nexus for image storage and Longhorn for backups ensures data reliability and disaster recovery.

• Efficiency: Implementing GitOps with ArgoCD streamlines application deployment and management processes.

Needed Resources

BareMetals

Hosts Configurations