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Update history of checkpoint support in Kubelet

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Update table in README.md:
- adding missing checkpoint packages
- addding status column to report removed checkpoint packages
- set status of dockershim checkpoint package to removed and status of
  all other checkpoint packages to In use.
This commit is contained in:
Sotiris Salloumis 2025-05-23 12:27:22 +02:00
parent f2bed63ca5
commit d383c8e024
1 changed files with 19 additions and 13 deletions
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32
pkg/kubelet/checkpointmanager/README.md
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@ -7,19 +7,25 @@ caused by the checkpointing.
## Introduction
This folder contains a framework & primitives, Checkpointing Manager, which is
used by several other Kubelet submodules, `dockershim`, `devicemanager`, `pods`
and `cpumanager`, to implement checkpointing at each submodule level. As already
explained in above `Disclaimer` section, think twice before introducing any further
checkpointing in Kubelet. If still checkpointing is required, then this folder
provides the common APIs and the framework for implementing checkpointing.
Using same APIs across all the submodules will help maintaining consistency at
Kubelet level.
used by several other Kubelet submodules, `devicemanager`, `pods`,
`cpumanager`, `memorymanager`, `dra` and `allocation`, to implement
checkpointing at each submodule level. As already explained in above `Disclaimer`
section, think twice before introducing any further checkpointing in Kubelet.
If still checkpointing is required, then this folder provides the common APIs
and the framework for implementing checkpointing. Using same APIs across all
the submodules will help maintaining consistency at Kubelet level.
Below is the history of checkpointing support in Kubelet.
| Package | First checkpointing support merged on | PR link |
| ------- | --------------------------------------| ------- |
|kubelet/dockershim | Feb 3, 2017 | [[CRI] Implement Dockershim Checkpoint](https://github.com/kubernetes/kubernetes/pull/39903)
|devicemanager| Sep 6, 2017 | [Deviceplugin checkpoint](https://github.com/kubernetes/kubernetes/pull/51744)
| kubelet/pod | Nov 22, 2017 | [Initial basic bootstrap-checkpoint support](https://github.com/kubernetes/kubernetes/pull/50984)
|cpumanager| Oct 27, 2017 |[Add file backed state to cpu manager ](https://github.com/kubernetes/kubernetes/pull/54408)
| Package | First checkpointing support merged on | PR link | Status |
| ------- | ------------------------------------- | ------- | ------ |
| kubelet/dockershim | Feb 3, 2017 | [[CRI] Implement Dockershim Checkpoint](https://github.com/kubernetes/kubernetes/pull/39903) | Removed
| devicemanager | Sep 6, 2017 | [Deviceplugin checkpoint](https://github.com/kubernetes/kubernetes/pull/51744) | In use
| kubelet/pod | Nov 22, 2017 | [Initial basic bootstrap-checkpoint support](https://github.com/kubernetes/kubernetes/pull/50984) | In use
| cpumanager | Oct 27, 2017 |[Add file backed state to cpu manager](https://github.com/kubernetes/kubernetes/pull/54408) | In use
| memorymanager| Feb 9, 2021 |[Memory manager](https://github.com/kubernetes/kubernetes/pull/95479) | In use
| dra | Mar 12, 2023 |[kubelet dra: Add checkpointing mechanism in the DRA Manager ](https://github.com/kubernetes/kubernetes/pull/115912) | In use
| dra | Jul 24, 2024 |[DRA:refactor checkpointing](https://github.com/kubernetes/kubernetes/pull/126303) | In use
| allocation | Feb 28, 2025 |[Move pod resource allocation management out of the status manager](https://github.com/kubernetes/kubernetes/pull/130254) | In use
Note: Dockershim has been removed from the Kubernetes project as of release 1.24, as a consequence dockershim checkpoint support has also been removed.