E: Failed to fetch https://mirrors.aliyun.com/kubernetes/apt/dists/kubernetes-xenial/main/binary-amd64/Packages server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none
E: Some index files failed to download. They have been ignored, or old ones used instead.
环境
ubuntu16.04 版本和配置信息
操作
导致该问题的操作或现象
日志
日志或报错信息