etcd的那點問題
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[root@k8s-master01 ssl]# etcdctl member list
client: etcd cluster is unavailable or misconfigured; error #0: x509: certificate signed by unknown authority
; error #1: x509: certificate signed by unknown authority
; error #2: x509: certificate signed by unknown authority
etcdctl工具是一個可以對etcd數據進行管理的命令行工具，這個工具在兩個不同的etcd版本下的行為方式也完全不同。
export ETCDCTL_API=2
export ETCDCTL_API=3
解決方法：
[root@k8s-master01 ssl]# export ETCDCTL_API=3
[root@k8s-master01 ssl]# systemctl restart etcd
[root@k8s-master01 ssl]# etcdctl member list
4b28ead506078a9, started, k8s-master01, https://172.18.98.21:2380, https://172.18.98.21:2379
298eff4fdb961547, started, k8s-master02, https://172.18.98.22:2380, https://172.18.98.22:2379
450977bc449bdf82, started, k8s-master03, https://172.18.98.23:2380, https://172.18.98.23:2379
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原文鏈接：https://blog.csdn.net/u013004700/article/details/81628403