k8s证书升级总结，修改证书时间

k8s证书升级总结，修改证书时间   1. 查看证书到期时间[master]   for i in /etc/kubernetes/pki/*.crt;do echo $i; openssl x509 -in $i -text -noout|egrep "Not Before|Not After";echo "-----------";done   ----------- etc/kubernet

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