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40 lines
1.6 KiB
Markdown
40 lines
1.6 KiB
Markdown
---
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title: API Stability
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sort_rank: 9
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---
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# API Stability Guarantees
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Prometheus promises API stability within a major version, and strives to avoid
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breaking changes for key features. Some features, which are cosmetic, still
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under development, or depend on 3rd party services, are not covered by this.
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Things considered stable for 2.x:
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* The query language and data model
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* Alerting and recording rules
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* The ingestion exposition format
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* v1 HTTP API (used by dashboards and UIs)
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* Configuration file format (minus the service discovery remote read/write, see below)
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* Rule/alert file format
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* Console template syntax and semantics
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Things considered unstable for 2.x:
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* Any feature listed as experimental or subject to change, including:
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* The [`holt_winters` PromQL function](https://github.com/prometheus/prometheus/issues/2458)
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* Remote read, remote write and the remote read endpoint
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* Server-side HTTPS and basic authentication
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* Service discovery integrations, with the exception of `static_configs` and `file_sd_configs`
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* Go APIs of packages that are part of the server
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* HTML generated by the web UI
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* The metrics in the /metrics endpoint of Prometheus itself
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* Exact on-disk format. Potential changes however, will be forward compatible and transparently handled by Prometheus
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* The format of the logs
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As long as you are not using any features marked as experimental/unstable, an
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upgrade within a major version can usually be performed without any operational
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adjustments and very little risk that anything will break. Any breaking changes
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will be marked as `CHANGE` in release notes.
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