输出redis cluster集群所有节点指定的参数的配置

需要：实现类似redis-trib.rb call 命令的功能，输出redis cluster集群所有节点指定的参数的配置

redis-trib.rb的输出

[redis@lxd-vm3 ~]$ redis-trib.rb call 5.5.5.101: config get *timeout*
/usr/local/ruby2.5.1/lib/ruby/gems/2.5./gems/redis-3.3./lib/redis/client.rb:: warning: constant ::Fixnum is deprecated
>>> Calling CONFIG get *timeout*
5.5.5.101:: ["timeout", "", "repl-timeout", "", "cluster-node-timeout", ""]
5.5.5.101:: ["timeout", "", "repl-timeout", "", "cluster-node-timeout", ""]
5.5.5.102:: ["timeout", "", "repl-timeout", "", "cluster-node-timeout", ""]
5.5.5.101:: ["timeout", "", "repl-timeout", "", "cluster-node-timeout", ""]
5.5.5.102:: ["timeout", "", "repl-timeout", "", "cluster-node-timeout", ""]
5.5.5.103:: ["timeout", "", "repl-timeout", "", "cluster-node-timeout", ""]
5.5.5.102:: ["timeout", "", "repl-timeout", "", "cluster-node-timeout", ""]
5.5.5.103:: ["timeout", "", "repl-timeout", "", "cluster-node-timeout", ""]

编写脚本

ip_port=`redis-cli -h $ -p $ -a abc123 -c cluster nodes | awk '{print $2}' | awk -F'@' '{print $1}'`

for i in $ip_port
do
    redis_ip=`echo $i | awk -F':' '{print $1}'|sed  's/\r//g'`
    redis_port=`echo $i | awk -F':' '{print $2}'|sed  's/\r//g'`
    redis_cmd="redis-cli -h $redis_ip -p $redis_port -a abc123 -c"
    echo -n "$redis_ip:$redis_port   "
    $redis_cmd  config get  $ > config
    cat config | awk 'NR % 2 == 0' > even
    cat config | awk 'NR % 2 == 1' > odd
    paste -d ':' odd even > tmp.txt
    tail_line=$(cat tmp.txt|sed -n '$p')
    printf '【'
    for x in `cat tmp.txt`
        do
            if [[ "$x" == "$tail_line" ]];then
               printf "%s" $x
            else
               printf '%s\t' $x
            fi
        done
        printf '】'
        echo
done

在后续学习awk命令中，遇到了getline命令，发现可以用一行命令替代上面红色字体的3条语句。

cat config | awk '{printf $0":";getline;print $0}' > tmp.txt

可以作为奇数行和偶数行两两配对一种方法。

说明：getline是获取当前行的下一行，即第一个$0输出的是奇数行，第二个$0输出的是偶数行，依次循环输出所有两两配对的键值对。

　

测试结果

[redis@lxd-vm1 ~]$ sh get_redis_para.sh 5.5.5.101  *timeout*
5.5.5.101:   【timeout:    repl-timeout:    cluster-node-timeout:】
5.5.5.101:   【timeout:    repl-timeout:    cluster-node-timeout:】
5.5.5.102:   【timeout:    repl-timeout:    cluster-node-timeout:】
5.5.5.101:   【timeout:    repl-timeout:    cluster-node-timeout:】
5.5.5.102:   【timeout:    repl-timeout:    cluster-node-timeout:】
5.5.5.103:   【timeout:    repl-timeout:    cluster-node-timeout:】
5.5.5.102:   【timeout:    repl-timeout:    cluster-node-timeout:】
5.5.5.103:   【timeout:    repl-timeout:    cluster-node-timeout:】