mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-12-19 03:20:20 +00:00
26 lines
1.7 KiB
Markdown
26 lines
1.7 KiB
Markdown
|
## DISCLAIMER
|
||
|
|
- Sig-Node community has reached a general consensus, as a best practice, to
|
||
|
|
avoid introducing any new checkpointing support. We reached this understanding
|
||
|
|
after struggling with some hard-to-debug issues in the production environments
|
||
|
|
caused by the checkpointing.
|
||
|
|
- Any changes to the checkpointed data structure would be considered incompatible and a component should add its own handling if it needs to ensure backward compatibility of reading old-format checkpoint files.
|
||
|
|
|
||
|
|
## 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.
|
||
|
|
|
||
|
|
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)
|