分享一段配置 SSH 互信的脚本。
— all 3 nodes
su - mysql
mkdir -p $HOME/.ssh
chmod 700 $HOME/.ssh
ssh-keygen -t rsa -P '' -f $HOME/.ssh/id_rsa
cat $HOME/.ssh/id_rsa.pub >> $HOME/.ssh/authorized_keys
chmod 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_node1
scp $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_node2
scp $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_node3
scp $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_keys
cat $HOME/.ssh/id_rsa.pub_node3 >> $HOME/.ssh/authorized_keys
–node2
cat $HOME/.ssh/id_rsa.pub_node1 >> $HOME/.ssh/authorized_keys
cat $HOME/.ssh/id_rsa.pub_node3 >> $HOME/.ssh/authorized_keys
–node3
cat $HOME/.ssh/id_rsa.pub_node1 >> $HOME/.ssh/authorized_keys
cat $HOME/.ssh/id_rsa.pub_node2 >> $HOME/.ssh/authorized_keys
–modify /etc/ssh/ssh_config 文件（或 $HOME/.ssh/config）in all 3 nodes
su -
vi /etc/ssh/ssh_config
StrictHostKeyChecking no
UserKnownHostsFile /dev/null
systemctl restart sshd.service
–copy something from local to remote.
[mysql@node1 ~]$ 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