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## What this PR does `LastFailedArchiveTime` compares a cluster's last failed WAL archival with its last successful one, so it resolves as soon as any segment gets through. Archiving that fails intermittently, or runs slower than the cluster writes WAL, keeps clearing that alert while the queue of segments waiting on the Postgres volume grows, until the volume is full and the database stops. The alert is also only a warning. This PR adds `CNPGWALArchiveBacklog`, a critical alert that fires when a primary's `archive_status` queue has not been empty once in 30 minutes. A healthy archiver empties the queue within seconds of each WAL switch, so a queue that never drains means point-in-time recovery is falling behind, whatever the archiver reports. Idle clusters and replicas have an empty queue and stay quiet. Validated live, since the repository has no rule-evaluation tooling: on a test cluster, two CNPG clusters archived into an object store that refused connections and into one that accepted them and never answered, while writing WAL continuously. The rule, evaluated by the root vmalert, fired for both. Over the previous seven days of the same cluster's metrics, none of its healthy clusters would have matched; those clusters carry light load, so a cluster whose archiver runs near its limit all the time has not been observed and would page, which is the intended reading of a queue that never drains. The unit test pins only that the rule ships in the rendered PrometheusRule as critical, since the rules reach the cluster through a file glob that drops a moved file silently. ### Screenshots Not a UI change. ### Downstream repositories - [x] No downstream repository is affected by this change - [ ] [cozystack/website](https://github.com/cozystack/website) - follow-up: - [ ] [cozystack/terraform-provider-cozystack](https://github.com/cozystack/terraform-provider-cozystack) - follow-up: - [ ] [cozystack/ansible-cozystack](https://github.com/cozystack/ansible-cozystack) - follow-up: - [ ] [cozystack/ccp](https://github.com/cozystack/ccp) - follow-up: - [ ] [cozystack/talm](https://github.com/cozystack/talm) - follow-up: - [ ] [cozystack/cozyhr](https://github.com/cozystack/cozyhr) - follow-up: - [ ] [cozystack/cozy-proxy](https://github.com/cozystack/cozy-proxy) - follow-up: - [ ] [cozystack/cozystack-telemetry-server](https://github.com/cozystack/cozystack-telemetry-server) - follow-up: - [ ] [cozystack/external-apps-example](https://github.com/cozystack/external-apps-example) - follow-up: - [ ] [cozystack/examples](https://github.com/cozystack/examples) - follow-up: - [ ] [cozystack/community](https://github.com/cozystack/community) - follow-up: The diff touches an operator chart's alert rules and its test; no path from the trigger map. ### Release note ```release-note feat(postgres-operator): page when a Postgres cluster's WAL archive queue has not drained for 30 minutes, which the existing archiving alert misses while some archives still succeed. ``` <!-- This is an auto-generated comment: release notes by coderabbit.ai --> ## Summary by CodeRabbit - **New Features** - Added a critical alert for sustained PostgreSQL WAL archive backlogs. It triggers when the minimum observed ready archive status remains above zero over a 30-minute window, then stays pending for 10 minutes before firing. The alert describes potential impacts on point-in-time recovery and storage usage. <!-- end of auto-generated comment: release notes by coderabbit.ai -->
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 as a Kubernetes distribution
You can use Cozystack as a Kubernetes distribution for Bare Metal
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.