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实现需求
在对单台机器做操作时我们会用“ssh ip”的方式登录到机器上，可以写这样一个工具vssh ip1,ip2,…ipn 来模拟登录到n 台服务器，登录后所有操作相当于同时对n 台服务器生效。
实现方法
首页要确保可以通过本地公钥无密码登录远程主机：
ssh-copy-id [-i [identity_file]] [user@]machine
shell脚本
#!/bin/bash
# -------------------------------------------------------------------------------
# Author: Loya.Chen
# Description: Execute commands on multiple remote hosts at the same time.
# -------------------------------------------------------------------------------
set -e
Usage() {
echo "Usage: $0 host1 host2 ... 'command'"
}
if [ $# -lt 2 ] ;then
Usage
exit 0
else
cmd=${!#}
fi
logfile=$(mktemp)
i=1
success=0
failed=0
for ip in $@;do
if [ $i -eq $# ];then
break
fi
ssh $ip $cmd &> $logfile
if [ $? -eq 0 ];then
#((success++))
success=$(($success+1))
echo -e "\n\033[32m$ip | success \033[0m \n"
cat $logfile
else
((failed++))
echo -e "\n\033[31m$ip | failed \033[0m\n "
cat $logfile
fi
((i++))
done
echo -e '\n-------------------------'
echo -e "\033[32msuccess: $success | failed: $failed \033[0m"
echo '-------------------------'
示例
$ bash vssh 10.0.0.11 10.0.0.12 'free -m'
10.0.0.11 | success
total used free shared buffers cached
Mem: 2871 156 2715 0 8 36
-/+ buffers/cache: 111 2760
Swap: 2047 0 2047
10.0.0.12 | success
total used free shared buffers cached
Mem: 980 615 365 0 12 69
-/+ buffers/cache: 533 447
Swap: 2047 0 2047
-------------------------
success: 2 | failed: 0
-------------------------
总结
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