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Eureka vs Kubernetes: What are the differences?
Eureka and Kubernetes are used for managing containerized applications and providing service discovery within a distributed system. Let's explore the key differences between Eureka and Kubernetes:
Architecture: Eureka is a service discovery tool following a client-server model, enabling services to register and discover each other using a central Eureka server. Kubernetes, on the other hand, is a container orchestration platform with a master-worker architecture, managing the deployment and networking of containerized applications.
Scalability and Management: Eureka scales by adding more server instances, providing load balancing and failover mechanisms. Kubernetes offers advanced scalability, dynamically scaling applications and distributing workloads across nodes. It also ensures self-healing capabilities for fault tolerance.
Containerization Support: Eureka is not inherently tied to containerization and can be used with any application, regardless of whether it is containerized or not. It primarily focuses on service registration, discovery, and load balancing. Kubernetes, on the other hand, is specifically designed for managing containerized applications. It provides features for deploying, scaling, and updating container instances, along with networking and storage management capabilities specific to containers.
Multi-Cloud and Hybrid Cloud Support: Eureka is cloud-agnostic and can be deployed in various environments, including on-premises, public clouds, or hybrid setups. Kubernetes supports multi-cloud and hybrid cloud deployments, providing consistent application runtime across different cloud providers or on-premises infrastructure.
Ecosystem and Integrations: Eureka, being part of the Netflix OSS suite, integrates well with other Netflix components and tools, such as Ribbon for client-side load balancing and Hystrix for fault tolerance. It has a lightweight footprint and is often used alongside other microservices frameworks and libraries. Kubernetes, on the other hand, has a rich ecosystem and wide adoption within the containerization community. It offers a comprehensive set of features for managing containerized applications, including networking, storage, monitoring, and logging. It integrates with various container runtimes, such as Docker, and has extensive support for declarative configuration and deployment management.
In summary, Eureka and Kubernetes are both widely used solutions for managing distributed systems and service discovery. Eureka focuses on service registration and discovery in microservices architectures, while Kubernetes provides a comprehensive container orchestration platform with advanced scalability and management features.
Our whole DevOps stack consists of the following tools:
- GitHub (incl. GitHub Pages/Markdown for Documentation, GettingStarted and HowTo's) for collaborative review and code management tool
- Respectively Git as revision control system
- SourceTree as Git GUI
- Visual Studio Code as IDE
- CircleCI for continuous integration (automatize development process)
- Prettier / TSLint / ESLint as code linter
- SonarQube as quality gate
- Docker as container management (incl. Docker Compose for multi-container application management)
- VirtualBox for operating system simulation tests
- Kubernetes as cluster management for docker containers
- Heroku for deploying in test environments
- nginx as web server (preferably used as facade server in production environment)
- SSLMate (using OpenSSL) for certificate management
- Amazon EC2 (incl. Amazon S3) for deploying in stage (production-like) and production environments
- PostgreSQL as preferred database system
- Redis as preferred in-memory database/store (great for caching)
The main reason we have chosen Kubernetes over Docker Swarm is related to the following artifacts:
- Key features: Easy and flexible installation, Clear dashboard, Great scaling operations, Monitoring is an integral part, Great load balancing concepts, Monitors the condition and ensures compensation in the event of failure.
- Applications: An application can be deployed using a combination of pods, deployments, and services (or micro-services).
- Functionality: Kubernetes as a complex installation and setup process, but it not as limited as Docker Swarm.
- Monitoring: It supports multiple versions of logging and monitoring when the services are deployed within the cluster (Elasticsearch/Kibana (ELK), Heapster/Grafana, Sysdig cloud integration).
- Scalability: All-in-one framework for distributed systems.
- Other Benefits: Kubernetes is backed by the Cloud Native Computing Foundation (CNCF), huge community among container orchestration tools, it is an open source and modular tool that works with any OS.
Pros of Eureka
- Easy setup and integration with spring-cloud21
- Web ui9
- Monitoring8
- Health checking8
- Circuit breaker7
- Netflix battle tested components6
- Service discovery6
- Open Source4
Pros of Kubernetes
- Leading docker container management solution164
- Simple and powerful128
- Open source106
- Backed by google76
- The right abstractions58
- Scale services25
- Replication controller20
- Permission managment11
- Supports autoscaling9
- Cheap8
- Simple8
- Self-healing6
- No cloud platform lock-in5
- Promotes modern/good infrascture practice5
- Open, powerful, stable5
- Reliable5
- Scalable4
- Quick cloud setup4
- Cloud Agnostic3
- Captain of Container Ship3
- A self healing environment with rich metadata3
- Runs on azure3
- Backed by Red Hat3
- Custom and extensibility3
- Sfg2
- Gke2
- Everything of CaaS2
- Golang2
- Easy setup2
- Expandable2
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Cons of Eureka
Cons of Kubernetes
- Steep learning curve16
- Poor workflow for development15
- Orchestrates only infrastructure8
- High resource requirements for on-prem clusters4
- Too heavy for simple systems2
- Additional vendor lock-in (Docker)1
- More moving parts to secure1
- Additional Technology Overhead1