我想对docker部署的mysql8.0.19进行备份，一开始试了一下Xtrabackup8.0.9 发现宿主机安装Xtrabackup不能连接到docker的mysql，需在docker容器里面安装。因为是微服务系统，数据库会有多个不想在每个容器中都安装Xtrabackup，请教各路大神宿主机安装Xtrabackup怎么对docker 容器的mysql备份，或者还有没有其它更好用的备份工具， mysqldump  这种方式不考虑

一下是允许命令后的异常信息

xtrabackup: recognized server arguments:--log_bin=mysql-bin--server-id=1--innodb_flush_log_at_trx_commit=1--innodb_log_buffer_size=1M--innodb_buffer_pool_size=64M--innodb_log_file_size=48M--innodb_autoextend_increment=64--innodb_open_files=300--innodb_file_per_table=1--innodb_checksum_algorithm=0--open_files_limit=4161xtrabackup: recognized client arguments:--user=root--password=*--host=172.17.0.2--port=8250--backup=1--parallel=4--target-dir=/home/back/db_cms_xtrabackupversion8.0.9basedonMySQLserver8.0.18Linux(x86_64)(revisionid:c5cbbe4)20031415:23:24version_checkConnectingtoMySQLserverwithDSN'dbi:mysql:;mysql_read_default_group=xtrabackup;host=172.17.0.2;port=8250'as'root'(usingpassword:YES).Failed to connect to MySQL server:DBIconnect(';mysql_read_default_group=xtrabackup;host=172.17.0.2;port=8250','root',...)failed:Can'tconnecttoMySQLserveron'172.17.0.2'(111)at-line1535.200314 15:23:24 Connecting to MySQL server host:172.17.0.2,user:root,password:set,port:8250,socket:notsetFailed to connect to MySQL server:Can'tconnecttoMySQLserveron'172.17.0.2'(111).

脚本

xtrabackup --defaults-file=/home/mysql/xxx/master/config/my.cnf -uroot -pXXX -Hlocalhost --port=8250 --backup --parallel=4 --target-dir=/home/back/db_xxx_ $name

 -H 一开始设置的是localhost不行，我换了mysql容器中的ip地址‘172.17.0.2’也不行。