panic: etcdclient: old cluster version

[hdytime]

My etcd version is very new but I still can't successfully start this demo.
I have been troubled for two days. Does anyone know how to solve this?

[Owen-Zhang]

看了 etcd client源码，这个错误是etcd server那边返回的

if maj < 3 || (maj == 3 && min < 2) {
   rerr = ErrOldCluster
}
// 如果主版本 < 3 或者 版本 < 3.2 才会报这个错误 （那个版本号在api项目中写死的）

你用etcd --version 估计应该也差不多，

1. 你看一下你的etcd服务端是不是使用了v2版本，
   2 看一个etcd client是不是老了，更新一点看看，反正就是服务端返回了版本信息，客户端做了一些验证

看一下server端的yaml文件, 同时升级etcd client，（我用 o.etcd.io/etcd/client/pkg/v3 v3.5.13， 都是正常的 ）

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---

After looking at etcd client source, this error is returned by etcd server.

if maj < 3 || (maj == 3 && min < 2) {
   rerr = ErrOldCluster
}
// This error will only be reported if the main version < 3 or version < 3.2 (that version number is hard-coded in the api project)

It should be similar if you use etcd --version.

1. Check to see if your etcd server uses version v2.
   2 Check if an etcd client is old, update it and see if it is

I personally feel that the problem is more likely to be caused by the server. Can you take a look at the configuration of etcd.yaml?