What is CoreOS?

It is designed for security, consistency, and reliability. Instead of installing packages via yum or apt, it 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 machines.
CoreOS is a tool in the Operating Systems category of a tech stack.
CoreOS is an open source tool with GitHub stars and GitHub forks. Here’s a link to CoreOS's open source repository on GitHub

Who uses CoreOS?

Companies
56 companies reportedly use CoreOS in their tech stacks, including SoFi, JustChunks, and Upfluence.

Developers
151 developers on StackShare have stated that they use CoreOS.

CoreOS Integrations

Datadog, Flocker, Server Density, DCHQ, and Tectonic are some of the popular tools that integrate with CoreOS. Here's a list of all 8 tools that integrate with CoreOS.
Pros of CoreOS
21
Container management
15
Lightweight
11
Systemd
Decisions about CoreOS

Here are some stack decisions, common use cases and reviews by companies and developers who chose CoreOS in their tech stack.

Joshua Dean Küpper
CEO at Scrayos UG (haftungsbeschränkt) · | 1 upvote · 14.6K views

As the basis of our new infrastructure, we formerly used CoreOS (and transitioned towards Fedora CoreOS as CoreOS was reaching its EOL) as a reliable solution for our docker-server-instances. We plan to deploy all our servers as individual docker containers to make use of the extensive possibilties offered in terms of isolation, resource-managemant (cgroups) and scalability.

The additional abstraction through containers allows us to adhere very closely to the "Cattle not Pets" best practice. Serverless was also an option that we considered, but as running Minecraft-Server requires quite unique resource profiles, that are usually not covered at most cloud providers, we settled with CoreOS for the time being and will reevaluate our options in the years to come.

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Joshua Dean Küpper
CEO at Scrayos UG (haftungsbeschränkt) · | 1 upvote · 15.8K views

We only use Ansible for some limited cluster-management, irregular maintenance tasks and low-level docker debugging and re-configuration on the individual servers, as we chose CoreOS (Fedora CoreOS) as our operating system and setup is done with an ignition-configuration. That is why we don't need to have a playbook for setting up servers or individual services. The servers boot up, completely initialized and ready to use.

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Blog Posts

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CoreOS's Features

  • Great to develop
  • Test
  • Operate

CoreOS Alternatives & Comparisons

What are some alternatives to CoreOS?
Docker
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
LinuxKit
LinuxKit, a toolkit for building custom minimal, immutable Linux distributions. Designed for building and running clustered applications, including but not limited to container orchestration such as Docker or Kubernetes.
Rancher
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.
Docker Swarm
Swarm serves the standard Docker API, so any tool which already communicates with a Docker daemon can use Swarm to transparently scale to multiple hosts: Dokku, Compose, Krane, Deis, DockerUI, Shipyard, Drone, Jenkins... and, of course, the Docker client itself.
Ubuntu
Ubuntu is an ancient African word meaning ‘humanity to others’. It also means ‘I am what I am because of who we all are’. The Ubuntu operating system brings the spirit of Ubuntu to the world of computers.
See all alternatives

CoreOS's Followers
268 developers follow CoreOS to keep up with related blogs and decisions.