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CoreOS vs Rancher: 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 Rancher? Open Source Platform for Running a Private Container Service. Rancher is an open source container management platform that includes full distributions of Kubernetes, Apache Mesos and Docker Swarm, and makes it simple to operate container clusters on any cloud or infrastructure platform.
CoreOS can be classified as a tool in the "Operating Systems" category, while Rancher is grouped under "Container Tools".
"Container management" is the primary reason why developers consider CoreOS over the competitors, whereas "Easy to use" was stated as the key factor in picking Rancher.
Rancher is an open source tool with 11.9K GitHub stars and 1.34K GitHub forks. Here's a link to Rancher's open source repository on GitHub.
According to the StackShare community, Rancher has a broader approval, being mentioned in 89 company stacks & 37 developers stacks; compared to CoreOS, which is listed in 45 company stacks and 12 developer stacks.
Pros of CoreOS
- Container management20
- Lightweight15
- Systemd9
Pros of Rancher
- Easy to use103
- Open source and totally free79
- Multi-host docker-compose support63
- Load balancing and health check included58
- Simple58
- Rolling upgrades, green/blue upgrades feature44
- Dns and service discovery out-of-the-box42
- Only requires docker37
- Multitenant and permission management34
- Easy to use and feature rich29
- Cross cloud compatible11
- Does everything needed for a docker infrastructure11
- Simple and powerful8
- Next-gen platform8
- Very Docker-friendly7
- Support Kubernetes and Swarm6
- Application catalogs with stack templates (wizards)6
- Supports Apache Mesos, Docker Swarm, and Kubernetes6
- Rolling and blue/green upgrades deployments6
- High Availability service: keeps your app up 24/76
- Easy to use service catalog5
- Very intuitive UI4
- IaaS-vendor independent, supports hybrid/multi-cloud4
- Awesome support4
- Scalable3
- Requires less infrastructure requirements2
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Cons of CoreOS
- End-of-lifed3
Cons of Rancher
- Hosting Rancher can be complicated10