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Keywhiz vs Kubernetes: What are the differences?
What is Keywhiz? A system for distributing and managing secrets. Keywhiz is a secret management and distribution service that is now available for everyone. Keywhiz helps us with infrastructure secrets, including TLS certificates and keys, GPG keyrings, symmetric keys, database credentials, API tokens, and SSH keys for external services — and even some non-secrets like TLS trust stores. Automation with Keywhiz allows us to seamlessly distribute and generate the necessary secrets for our services, which provides a consistent and secure environment, and ultimately helps us ship faster.
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.
Keywhiz can be classified as a tool in the "Secrets Management" category, while Kubernetes is grouped under "Container Tools".
Some of the features offered by Keywhiz are:
- Keywhiz Server provides JSON APIs for accessing and managing secrets. It is written in Java and based on Dropwizard.
- KeywhizFs is a FUSE-based file system, providing secrets as if they are files in a directory. Transparently, secrets are retrieved from a Keywhiz Server using mTLS with a client certificate.
- Presenting secrets as files makes Keywhiz compatible with nearly all software. Outside of Keywhiz administration, consumers of secrets only have to know how to read a file.
On the other hand, Kubernetes provides the following key features:
- Lightweight, simple and accessible
- Built for a multi-cloud world, public, private or hybrid
- Highly modular, designed so that all of its components are easily swappable
Keywhiz and Kubernetes are both open source tools. It seems that Kubernetes with 55.1K GitHub stars and 19.1K forks on GitHub has more adoption than Keywhiz with 2.09K GitHub stars and 166 GitHub forks.
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 Keywhiz
- Fuse FS3
Pros of Kubernetes
- Leading docker container management solution162
- Simple and powerful126
- Open source104
- Backed by google75
- The right abstractions56
- Scale services24
- Replication controller19
- Permission managment10
- Cheap7
- Supports autoscaling7
- Simple7
- Reliable4
- Self-healing4
- No cloud platform lock-in4
- Quick cloud setup3
- Open, powerful, stable3
- Scalable3
- Promotes modern/good infrascture practice3
- Captain of Container Ship2
- A self healing environment with rich metadata2
- Cloud Agnostic2
- Runs on azure2
- Backed by Red Hat2
- Custom and extensibility2
- Golang1
- Expandable1
- Gke1
- Easy setup1
- Sfg1
- Everything of CaaS1
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Cons of Keywhiz
Cons of Kubernetes
- Poor workflow for development15
- Steep learning curve15
- 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