分享一段配置SSH互信的脚本。
-- all 3 nodes
su - mysqlmkdir -p $HOME/.sshchmod 700 $HOME/.sshssh-keygen -t rsa -P '' -f $HOME/.ssh/id_rsacat $HOME/.ssh/id_rsa.pub >> $HOME/.ssh/authorized_keyschmod 644 $HOME/.ssh/authorized_keys--Copy the public key to new slave node in mysql user $HOME directory
--node1
scp $HOME/.ssh/id_rsa.pub mysql@192.168.56.82:/home/mysql/.ssh/id_rsa.pub_node1scp $HOME/.ssh/id_rsa.pub mysql@192.168.56.83:/home/mysql/.ssh/id_rsa.pub_node1--node2
scp $HOME/.ssh/id_rsa.pub mysql@192.168.56.81:/home/mysql/.ssh/id_rsa.pub_node2scp $HOME/.ssh/id_rsa.pub mysql@192.168.56.83:/home/mysql/.ssh/id_rsa.pub_node2--node3
scp $HOME/.ssh/id_rsa.pub mysql@192.168.56.81:/home/mysql/.ssh/id_rsa.pub_node3scp $HOME/.ssh/id_rsa.pub mysql@192.168.56.82:/home/mysql/.ssh/id_rsa.pub_node3--node1
cat $HOME/.ssh/id_rsa.pub_node2 >> $HOME/.ssh/authorized_keyscat $HOME/.ssh/id_rsa.pub_node3 >> $HOME/.ssh/authorized_keys--node2
cat $HOME/.ssh/id_rsa.pub_node1 >> $HOME/.ssh/authorized_keyscat $HOME/.ssh/id_rsa.pub_node3 >> $HOME/.ssh/authorized_keys--node3
cat $HOME/.ssh/id_rsa.pub_node1 >> $HOME/.ssh/authorized_keyscat $HOME/.ssh/id_rsa.pub_node2 >> $HOME/.ssh/authorized_keys--modify /etc/ssh/ssh_config文件（或$HOME/.ssh/config）in all 3 nodes
su - vi /etc/ssh/ssh_configStrictHostKeyChecking noUserKnownHostsFile /dev/nullsystemctl restart sshd.service--copy something from local to remote.
[mysql@node1 ~]$ scp -r /opt/soft/mysql-cluster-8.0.25-el7-x86_64 node2:/opt/soft[mysql@node1 ~]$ scp -r /opt/soft/mysql-cluster-8.0.25-el7-x86_64 node3:/opt/soft