运维之自动化SHELL脚本
#!/bin/bashexit_with_help()
{
echo "Usage: lshost PATTERN
Options:
-u 每台机器发送一条命令;
-c 远程执行的命令行;
-e 扩展模式，将远程命令中的\${flag}字符串替换为服务器标志(eg:jw_1)
-s 不更新服务器列表
-h 打印本帮助信息;
eg: lshost -u -c 'ls' 'jw_.*'
eg2: lshost -e -c 'grep '\''jw'\'' /home/jw''wsw_1'
"
exit 0
}
#默认参数
uniq="false"
expand="false"
cmd=""
pattern=""
static="false"
while getopts ":usec:h" optname
do
case "$optname" in
"u")
uniq="true";
;;
"c")
cmd="$OPTARG"
;;
"e")
expand="true"
;;
"s")
static="true";
;;
"?")
echo "Unkown option $OPTARG"
exit_with_help;
;;
":")
echo "No arugument value for option $OPTARG"
exit_with_help;
;;
"h")
exit_with_help;
;;
"*")
echo "Unsupported option [$optname]"
exit_with_help;
;;
esac
done
pattern=${@:$OPTIND}
if [ -z "$pattern" ];
then
echo "Pattern must be given"
exit_with_help;
fi
if [ -f ~/.lshost/serverlist-a $static == "false" ];
then
rm -f ~/.lshost/serverlist
wget -q 'http://{IP}/serverlist' -P ~/.lshost
fi
servers=`grep -E "$pattern" ~/.lshost/serverlist `
if [ $uniq == "true" ];
then
servers=`echo $servers|awk -F '@' 'BEGIN{RS=" "}{dict[$2]=$1}END{for(i in dict){print dict"@"i}}'`
fi
if [ -z "$cmd" ];
then
for i in $servers;
do
echo $i
done
else
for i in $servers;
do
host=`echo $i |awk -F'@' '{print $2}'`
server=`echo $i |awk -F'@' '{print $1}'`
if [ $expand == "true" ];
then
real_cmd=`echo "${cmd}"|sed 's/${flag}/'${server}'/g'`
else
real_cmd=$cmd
fi
echo -n $i": "
echo -e "\e\e[0m"
ssh -p 22 root@$host "$real_cmd" &>~/.lshost/stdout
if [ $?-ne 0 ];
then
echo -e "\e\e[0m";
else
echo -e "\e\e[0m";
fi
cat ~/.lshost/stdout
echo "=============================================="
done
fi
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