Rancher Cluster is being upgraded

Posted 2022-01-02 catoop

如题，出现这个问题大概率就是在单机版 docker 运行的 rancher 上手贱进行了升级操作后导致的吧（哈哈）

官方给的说法中：docker 版的 rancher 是不能升级的，因为之前的版本官方并没有堵死这个操作，所以我们就能干啊。但是实际上操作了就会出错的，所以在后来的版本中 docker 版 rancher 不能做这个操作了。

但是问题已经出现了，咋办呢？以下是操作步骤，拷贝自官方的 issue，文后给出官方链接。

1. Go to your local cluster
2. Go to Edit cluster
3. Set control plane concurrency and Worker concurrency to 1
4. Press save
5. Now you should be back at your local cluster
6. Go to View in API
7. In the top right corner of the API click on Edit
8. Edit the value of k3sConfig and set it to "k3supgradeStrategy":"drainServerNodes":false,"drainWorkerNodes":false,"serverConcurrency":1,"type":"/v3/schemas/clusterUpgradeStrategy","workerConcurrency":1,"kubernetesVersion":"v1.18.8+k3s1","type":"/v3/schemas/k3sConfig". (Or the version your k3s version used to be, you can still see the old version on the Dashboard).
9. Click Show Request
10. Click on Send Request
11. You should get a HTTP response 200

总结一下就是：手工通过API接口，将版本号修改还原为原来的版本号。

官方链接：https://github.com/rancher/rancher/issues/29966

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