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Update LTS definition and support horizon
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Signed-off-by: Derek McGowan <[email protected]>
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dmcgowan committed Jan 20, 2025
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Expand Up @@ -90,43 +90,34 @@ whichever is longer. Additionally, releases may have an extended security suppor
period after the end of the active period to accept security backports. This
timeframe will be decided by maintainers before the end of the active status.

Long term stable (_LTS_) releases will be supported for at least three years after
their initial _minor_ release. These branches will accept bug reports and
backports until the end of life date. They may also accept a wider range of
patches than non-_LTS_ releases to support the longer term maintainability of the
branch, including library dependency, toolchain (including Go) and other version updates
which are needed to ensure each release is built with fully supported dependencies and
remains usable by containerd clients. _LTS_ releases can also accept feature backports
to support new Kubernetes releases. The default action has to be reject it though,
for long-term stability. This is still negotiable when the feature is a hard dependency
for a new release of Kubernetes. There should be at least a 6-month overlap between
the end of life of an _LTS_ release and the initial release of a new _LTS_ release.
Up to 6 months before the announced end of life of an _LTS_ branch, the branch may
convert to a regular _Active_ release with stricter backport criteria.
Long term stable (_LTS_) releases are sponsored by at least two maintainers for at least two
years after their initial _minor_ release. The maintainers of the _LTS_ branch may commit to a
longer period or extend the support period as needed. These branches will accept bug reports and
backports until the end of life date. They may also accept a wider range of patches than non-_LTS_
releases to support the longer term maintainability of the branch, including library dependency,
toolchain (including Go) and other version updates which are needed to ensure each release is built
with fully supported dependencies. Feature backports are up to the discretion of the maintainers who
own the branch but should be rejected by default. There is no limit to the number of _LTS_ branches
and any branch may become an _LTS_ branch after its initial release. There is no guarantee that a
new _LTS_ branch will be designated before existing _LTS_ branches reach their end of life.

The current state is available in the following tables:

| Release | Status | Start | End of Life |
| --------- | ------------- | ------------------ | ------------------- |
| [0.0](https://github.com/containerd/containerd/releases/tag/0.0.5) | End of Life | Dec 4, 2015 | - |
| [0.1](https://github.com/containerd/containerd/releases/tag/v0.1.0) | End of Life | Mar 21, 2016 | - |
| [0.2](https://github.com/containerd/containerd/tree/v0.2.x) | End of Life | Apr 21, 2016 | December 5, 2017 |
| [1.0](https://github.com/containerd/containerd/releases/tag/v1.0.3) | End of Life | December 5, 2017 | December 5, 2018 |
| [1.1](https://github.com/containerd/containerd/releases/tag/v1.1.8) | End of Life | April 23, 2018 | October 23, 2019 |
| [1.2](https://github.com/containerd/containerd/releases/tag/v1.2.13) | End of Life | October 24, 2018 | October 15, 2020 |
| [1.3](https://github.com/containerd/containerd/releases/tag/v1.3.10) | End of Life | September 26, 2019 | March 4, 2021 |
| [1.4](https://github.com/containerd/containerd/releases/tag/v1.4.13) | End of Life | August 17, 2020 | March 3, 2022 |
| [1.5](https://github.com/containerd/containerd/releases/tag/v1.5.18) | End of Life | May 3, 2021 | February 28, 2023 |
| [1.6](https://github.com/containerd/containerd/releases/tag/v1.6.36) | LTS | February 15, 2022 | next LTS + 6 months |
| [1.7](https://github.com/containerd/containerd/releases/tag/v1.7.23) | Active | March 10, 2023 | active(May 5, 2025), extended(EOL of 1.6) |
| [2.0](https://github.com/containerd/containerd/releases/tag/v2.0.0) | Active | November 5, 2024 | max(November 5, 2025 or release of 2.1 + 6 months) |
| [2.1](https://github.com/containerd/containerd/milestone/48) | Next | TBD | TBD |

> **_NOTE_** containerd v1.7 will end of life at the same time as v1.6 LTS. Due to
> [Minimal Version Selection](https://go.dev/ref/mod#minimal-version-selection) used
> by Go modules, 1.7 must be supported until EOL of all 1.x releases. Once 1.7 is in
> extended support, it will continue to accept security patches in addition to client
> changes relevant for package importers using the 1.6 LTS daemon.
| Release | Status | Start | End of Life | Owners |
| --------- | ------------- | ------------------ | -------------------------------------------------- | ---------------------- |
| [0.0](https://github.com/containerd/containerd/releases/tag/0.0.5) | End of Life | Dec 4, 2015 | - | |
| [0.1](https://github.com/containerd/containerd/releases/tag/v0.1.0) | End of Life | Mar 21, 2016 | - | |
| [0.2](https://github.com/containerd/containerd/tree/v0.2.x) | End of Life | Apr 21, 2016 | December 5, 2017 | |
| [1.0](https://github.com/containerd/containerd/releases/tag/v1.0.3) | End of Life | December 5, 2017 | December 5, 2018 | |
| [1.1](https://github.com/containerd/containerd/releases/tag/v1.1.8) | End of Life | April 23, 2018 | October 23, 2019 | |
| [1.2](https://github.com/containerd/containerd/releases/tag/v1.2.13) | End of Life | October 24, 2018 | October 15, 2020 | |
| [1.3](https://github.com/containerd/containerd/releases/tag/v1.3.10) | End of Life | September 26, 2019 | March 4, 2021 | |
| [1.4](https://github.com/containerd/containerd/releases/tag/v1.4.13) | End of Life | August 17, 2020 | March 3, 2022 | |
| [1.5](https://github.com/containerd/containerd/releases/tag/v1.5.18) | End of Life | May 3, 2021 | February 28, 2023 | |
| [1.6](https://github.com/containerd/containerd/releases/tag/v1.6.36) | LTS | February 15, 2022 | July 17, 2025 | @containerd/committers |
| [1.7](https://github.com/containerd/containerd/releases/tag/v1.7.23) | LTS | March 10, 2023 | March 10, 2026 | @containerd/committers |
| [2.0](https://github.com/containerd/containerd/releases/tag/v2.0.0) | Active | November 5, 2024 | max(November 5, 2025 or release of 2.1 + 6 months) | @containerd/committers |
| [2.1](https://github.com/containerd/containerd/milestone/48) | Next | TBD | TBD | |

### Kubernetes Support

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