How to operate three servers at the same time

Operate three hosts through pycharm's SSH terminal, and want to output a command to be executed synchronously on the three machines

Method 1, write a script
1, first use to ssh-keygengenerate a key file.
2. ssh-copy-id -i xxx.pub HOSTCopy the public key file to the specified HOST
3. Create a hostlistfile on the current machine and write it to the machine address (xxx.xxx.xxx.xxx)
4. Write a script on the current machine (note that the path in the script needs to be changed)

#!/bin/bash
run_cmd () 
{ 
    local hostlist=`cat /opt/k8s/work/hostlist | awk '{ print $1 }'`;
    for host in $hostlist;
    do
        echo "=============="$host"=============="
        ssh -o StrictHostKeyChecking=no -o ConnectTimeout=2  "$host" $@  ;
    done
}
run_cmd $@

5, increase the execution permission of the file
6, execute the command./run_cmd date

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Original link https://blog.csdn.net/weixin_42165490/article/details/112652257

Method 2, have not tried
to useansible