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CoreOS vs Docker: What are the differences?
What is CoreOS? Linux for Massive Server Deployments. CoreOS is designed for security, consistency, and reliability. Instead of installing packages via yum or apt, CoreOS uses Linux containers to manage your services at a higher level of abstraction. A single service's code and all dependencies are packaged within a container that can be run on one or many CoreOS machines.
What is Docker? Enterprise Container Platform for High-Velocity Innovation. The Docker Platform is the industry-leading container platform for continuous, high-velocity innovation, enabling organizations to seamlessly build and share any application — from legacy to what comes next — and securely run them anywhere.
CoreOS belongs to "Operating Systems" category of the tech stack, while Docker can be primarily classified under "Virtual Machine Platforms & Containers".
"Container management" is the primary reason why developers consider CoreOS over the competitors, whereas "Rapid integration and build up" was stated as the key factor in picking Docker.
Docker is an open source tool with 54K GitHub stars and 15.6K GitHub forks. Here's a link to Docker's open source repository on GitHub.
According to the StackShare community, Docker has a broader approval, being mentioned in 3527 company stacks & 3449 developers stacks; compared to CoreOS, which is listed in 45 company stacks and 12 developer stacks.
lxd/lxc and Docker aren't congruent so this comparison needs a more detailed look; but in short I can say: the lxd-integrated administration of storage including zfs with its snapshot capabilities as well as the system container (multi-process) approach of lxc vs. the limited single-process container approach of Docker is the main reason I chose lxd over Docker.
Pros of CoreOS
- Container management20
- Lightweight15
- Systemd11
Pros of Docker
- Rapid integration and build up824
- Isolation692
- Open source521
- Testability and reproducibility505
- Lightweight460
- Standardization218
- Scalable185
- Upgrading / downgrading / application versions106
- Security88
- Private paas environments85
- Portability34
- Limit resource usage26
- Game changer17
- I love the way docker has changed virtualization16
- Fast14
- Concurrency12
- Docker's Compose tools8
- Easy setup6
- Fast and Portable6
- Because its fun5
- Makes shipping to production very simple4
- Highly useful3
- It's dope3
- Its cool2
- MacOS support FAKE2
- Simplicity, isolation, resource effective2
- Open source and highly configurable2
- Does a nice job hogging memory2
- Package the environment with the application2
- Very easy to setup integrate and build2
- HIgh Throughput2
- Docker hub for the FTW2
- Super2
- Asdfd0
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Cons of CoreOS
- End-of-lifed3
Cons of Docker
- New versions == broken features8
- Unreliable networking6
- Documentation not always in sync6
- Moves quickly4
- Not Secure3
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What is CoreOS?
What is Docker?
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