uncloud/docs/source/introduction/introduction.rst

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What is ucloud?
===============
**Open** + **Simple** + **Easy to hack** + **IPv6 First**
ucloud is an easy to use cloud management system.
It is an alternative to OpenStack, OpenNebula or Cloudstack.
ucloud is the first cloud management system that puts IPv6 first. ucloud also has an integral ordering process that we missed in existing solutions.
Tech Stack
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* Python 3 as main language.
* Flask for APIs.
* JSON for specifications.
* QEMU (+ kvm acceleration) as hypervisor.
* etcd for key/value storage (specifically all metadata e.g Virtual Machine Specifications, Networks Specifications, Images Specifications etc.).
* Ceph for image storage.
* uotp for user authentication.
Components
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* API
* Scheduler
* Host
* File Scanner
* Image Scanner
* Metadata Server
* VM Init Scripts (dubbed as ucloud-init)