配置SSH互信 linux

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

【配置SSH互信】--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_configStrictHostKeyChecking no UserKnownHostsFile /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