连接mysql容器时报错如下 ERROR 2059 (HY000): Authentication plugin ‘caching_sha2_password’ cannot be loaded: /usr/lib/mysql/plugin/caching_sha2_password.so: cannot open shared object file: No such file or directory 原因是docker pull下来的是最新的mysql镜像，移除镜像，重新拉取5.7版的镜像即可
docker pull mysql:5.7