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Kubernetes vs Zookeeper: What are the differences?
What is Kubernetes? Manage a cluster of Linux containers as a single system to accelerate Dev and simplify Ops. Kubernetes is an open source orchestration system for Docker containers. It handles scheduling onto nodes in a compute cluster and actively manages workloads to ensure that their state matches the users declared intentions.
What is Zookeeper? Because coordinating distributed systems is a Zoo. A centralized service for maintaining configuration information, naming, providing distributed synchronization, and providing group services. All of these kinds of services are used in some form or another by distributed applications.
Kubernetes and Zookeeper are primarily classified as "Container" and "Open Source Service Discovery" tools respectively.
"Leading docker container management solution" is the primary reason why developers consider Kubernetes over the competitors, whereas "High performance ,easy to generate node specific config" was stated as the key factor in picking Zookeeper.
Kubernetes is an open source tool with 54.2K GitHub stars and 18.8K GitHub forks. Here's a link to Kubernetes's open source repository on GitHub.
According to the StackShare community, Kubernetes has a broader approval, being mentioned in 1018 company stacks & 1060 developers stacks; compared to Zookeeper, which is listed in 116 company stacks and 48 developer stacks.
We develop rapidly with docker-compose orchestrated services, however, for production - we utilise the very best ideas that Kubernetes has to offer: SCALE! We can scale when needed, setting a maximum and minimum level of nodes for each application layer - scaling only when the load balancer needs it. This allowed us to reduce our devops costs by 40% whilst also maintaining an SLA of 99.87%.
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 Kubernetes
- Leading docker container management solution161
- Simple and powerful126
- Open source103
- Backed by google75
- The right abstractions56
- Scale services24
- Replication controller19
- Permission managment9
- Simple7
- Supports autoscaling7
- Cheap6
- Self-healing4
- No cloud platform lock-in4
- Reliable4
- Open, powerful, stable3
- Scalable3
- Quick cloud setup3
- Promotes modern/good infrascture practice3
- Backed by Red Hat2
- Cloud Agnostic2
- Runs on azure2
- Custom and extensibility2
- Captain of Container Ship2
- A self healing environment with rich metadata2
- Golang1
- Easy setup1
- Everything of CaaS1
- Sfg1
- Expandable1
- Gke1
Pros of Zookeeper
- High performance ,easy to generate node specific config11
- Java8
- Kafka support8
- Spring Boot Support5
- Supports extensive distributed IPC3
- Supports DC/OS2
- Used in ClickHouse2
- Curator1
- Embeddable In Java Service1
- Used in Hadoop1
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Cons of Kubernetes
- Poor workflow for development15
- Steep learning curve13
- Orchestrates only infrastructure7
- High resource requirements for on-prem clusters4
- Additional vendor lock-in (Docker)1
- Additional Technology Overhead1
- More moving parts to secure1
- Too heavy for simple systems1
Cons of Zookeeper
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What is Kubernetes?
What is Zookeeper?
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