Myasnikov Daniil
59f0013b1f
Every backup of a MariaDB application writes its dump under one shared prefix, so the probe took the dump whose file-name timestamp (the backup pod's clock) and LastModified (the object store's clock) both fall in the operator Backup's lifetime, with a minute of slack for skew. That keeps a neighbour's dump out only while this run's own dump is in the window. With the pod clock more than the slack behind, the own dump is named before the window opens, and a previous run that finished within the minute before this one was created becomes the single match: a 123-byte dump was reported as 666 bytes. A pod clock ahead or an object store clock behind does the same with the next run, and an own dump that is gone by the time it is looked up, as it can be for a restore long after the backup, leaves a neighbour as the single match with no skew at all. A dump is now attributed only when ownership is proven: - it is the one dump that either clock places in the window. A dump that one clock places there and the other does not may be this run's own with a skewed clock, so it leaves any other match unproven, the way a second dump in the window already did, and is not taken itself; - both of its clocks place it in the window; - neither clock places it in the window of another operator Backup that writes under the same bucket and prefix and has completed. This rejects a neighbour's dump when this run's own is missing, which the clocks alone cannot tell. Operator Backups still running are not counted as neighbours: their window has no end, and one stuck short of Complete (a Job whose pod never starts stays JobRunning for good) would otherwise keep every later run of the application from being sized. A dump such a run writes inside this run's window still competes with this run's own. Narrower slack does not prove ownership: a neighbour that finished within the narrower slack still matches, and a smaller skew pushes the own dump out. The Job's start and completion times are stamped by the control plane, like the operator Backup's own, so they narrow the window by seconds without removing the dependence on the two clocks a dump carries. What is left: a neighbour's dump is taken only when this run's own is missing from the listing or misplaced on both clocks and the neighbour's operator Backup no longer exists or has not completed. Every other unproven case leaves the size unset, as two runs that overlap or follow each other within the slack already did. Assisted-by: LLM Signed-off-by: Myasnikov Daniil <myasnikovdaniil2001@gmail.com>
Cozystack
Cozystack is a free and open-source platform and framework for building clouds.
Cozystack is a CNCF Sandbox project that was originally built and sponsored by Ænix.
With Cozystack, you can transform a bunch of servers into an intelligent system with a simple REST API for spawning Kubernetes clusters, Database-as-a-Service, virtual machines, load balancers, HTTP caching services, and other services with ease.
Use Cozystack to build your own cloud or provide a cost-effective development environment.
Use-Cases
-
Using Cozystack to build a public cloud
You can use Cozystack as a backend for a public cloud -
Using Cozystack to build a private cloud
You can use Cozystack as a platform to build a private cloud powered by Infrastructure-as-Code approach -
Using Cozystack to build your own platform
You can install only the Cozystack components you need on an existing Kubernetes cluster
Documentation
The documentation is located on the cozystack.io website.
Read the Getting Started section for a quick start.
If you encounter any difficulties, start with the troubleshooting guide and work your way through the process that we've outlined.
Versioning
Versioning adheres to the Semantic Versioning principles.
A full list of the available releases is available in the GitHub repository's Release section.
Contributions
Contributions are highly appreciated and very welcomed!
In case of bugs, please check if the issue has already been opened by checking the GitHub Issues section. If it isn't, you can open a new one. A detailed report will help us replicate it, assess it, and work on a fix.
You are welcome to take on the fix yourself. Commits are used to generate the changelog, and their author will be referenced in it.
If you have a concrete feature request, open an issue. For a cross-cutting or architectural change, open a design proposal in the community repo. For questions or early ideas, use GitHub Discussions. See CONTRIBUTING.md for the full routing.
Community
You are welcome to join us in #cozystack, on either CNCF Slack (get an invite) or Kubernetes Slack (get an invite), in our Telegram group, and at our community meetings. Add them to your Google Calendar or iCal for convenience.
Project documents
| Document | What it covers |
|---|---|
| Governance | How decisions are made and who makes them |
| Contributor Ladder | How to grow from contributor to maintainer |
| Maintainers | Who maintains the project |
| Code of Conduct | What we expect of each other |
| Security Policy | Reporting a vulnerability, and which releases get fixes |
| Adopters | Who runs Cozystack in production |
| Roadmap | Where the project is going |
License
Cozystack is licensed under Apache 2.0.
The code is provided as-is with no warranties.
Commercial Support
A list of companies providing commercial support for this project can be found on official site.