request help: 使用mock etcd后发现会定期出现etcdserver: duplicate key given in txn reques的报错

[Tanc010]

Issue description

我发现controller会间隔一段时间做一次全局的sync，每次sync都会作为Add事件最终执行etcd的create，这样就会出错。

上面是定时做全局的sync

上面会将sync作为Add事件

问题：是否可以sync的时候先判断如果etcd中有数据则进行Update而不是Create

Environment

• your apisix-ingress-controller version (output of apisix-ingress-controller version --long):
• your Kubernetes cluster version (output of kubectl version):
• if you run apisix-ingress-controller in Bare-metal environment, also show your OS version (uname -a):

[github-actions]

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