1. 背景：生产测试后redis中产生大量数据
生产前需要清理reids集群中的数据。、
你看有很多key呢：
使用工具
使用命令，查看是否有数据：
keys *
2. 清理步骤
2.1 任意登录一台redis机器
执行下面脚本：
clear_redis_cluster.sh 10.1.33.101:8001 redis
执行日志如下：
clearing 10.1.33.112:8028 ...background append only file rewriting startedreadonly you can't write against a read only replica. clearing 10.1.33.110:8026 ...background append only file rewriting startedreadonly you can't write against a read only replica. clearing 10.1.33.111:8027 ...background append only file rewriting startedreadonly you can't write against a read only replica. clearing 10.1.33.107:8007 ...background append only file rewriting startedokclearing 10.1.33.108:8024 ...background append only file rewriting startedreadonly you can't write against a read only replica. clearing 10.1.33.104:8020 ...background append only file rewriting startedreadonly you can't write against a read only replica. clearing 10.1.33.114:8014 ...background append only file rewriting startedokclearing 10.1.33.109:8025 ...background append only file rewriting startedreadonly you can't write against a read only replica. clearing 10.1.33.105:8005 ...background append only file rewriting startedokclearing 10.1.33.108:8008 ...background append only file rewriting startedok
2.2 clear_redis_cluster.sh内容
#!/bin/bash# writed by yijian on 2018/8/20# batch to clear all nodes using flushall command# 用来清空一个redis集群中的所有数据，要求 flushall 命令可用，# 如果在 redis.conf 中使用 rename 改名了 flushall，则不能执行本脚本。# 可带两个参数：# 1）参数1 集群中的任一可用节点（必须）# 2）连接redis的密码（设置了密码才需要）redis_cli=${redis_cli:-redis-cli}redis_ip=${redis_ip:-127.0.0.1}redis_port=${redis_port:-6379}# 显示用法函数function usage(){ echo "usage: clear_redis_cluster.sh a_redis_node_of_cluster redis_password" echo "example1: clear_redis_cluster.sh '127.0.0.1:6379'" echo "example2: clear_redis_cluster.sh '127.0.0.1:6379' '123456'"}# 检查参数个数if test $# -lt 1 -o $# -gt 2; then usage exit 1fi# 第一个参数为集群中的节点，redis_node="$1"# 第二个参数为密码redis_password=""if test $# -ge 2; then redis_password="$2"fi# 取得ip和端口eval $(echo "$redis_node" | awk -f[\:] '{ printf("redis_ip=%s\nredis_port=%s\n",$1,$2) }')if test -z "$redis_ip" -o -z "$redis_port"; then echo "parameter error: \`$redis_node\`." usage exit 1fi# 确保redis-cli可用echo "checking \`redis-cli\` ..."which "$redis_cli" > /dev/null 2>&1if test $? -ne 0; then echo "command \`redis-cli\` is not exists or not executable." echo "you can set environment variable \`redis_cli\` to point to the redis-cli." echo "example: export redis_cli=/usr/local/bin/redis-cli" exit 1fiif test -z "$redis_password"; then redis_nodes=`redis-cli -h $redis_ip -p $redis_port cluster nodes | awk -f[\ \:\@] '!/err/{ printf("%s:%s\n",$2,$3); }'`else redis_nodes=`redis-cli --no-auth-warning -a "$redis_password" -h $redis_ip -p $redis_port cluster nodes | awk -f[\ \:\@] '!/err/{ printf("%s:%s\n",$2,$3); }'`fiif test -z "$redis_nodes"; then # standlone（非集群） if test -z "$redis_password"; then $redis_cli -h $redis_ip -p $redis_port flushall async $redis_cli -h $redis_ip -p $redis_port bgrewriteaof else $redis_cli --no-auth-warning -a "$redis_password" -h $redis_ip -p $redis_port flushall async $redis_cli --no-auth-warning -a "$redis_password" -h $redis_ip -p $redis_port bgrewriteaof fielse # cluster（集群） for redis_node in $redis_nodes; do if test ! -z "$redis_node"; then eval $(echo "$redis_node" | awk -f[\:] '{ printf("redis_node_ip=%s\nredis_node_port=%s\n",$1,$2) }') if test ! -z "$redis_node_ip" -a ! -z "$redis_node_port"; then # clear echo -e "clearing 3[1;33m${redis_node_ip}:${redis_node_port}3[m ..." if test -z "$redis_password"; then result=`$redis_cli -h $redis_node_ip -p $redis_node_port flushall async` $redis_cli -h $redis_node_ip -p $redis_node_port bgrewriteaof else result=`$redis_cli --no-auth-warning -a "$redis_password" -h $redis_node_ip -p $redis_node_port flushall async` $redis_cli --no-auth-warning -a "$redis_password" -h $redis_node_ip -p $redis_node_port bgrewriteaof fi if test ! -z "$result"; then # success if test "$result" = "ok"; then echo -e "3[0;32;32m$result3[m" else echo -e "3[0;32;31m$result3[m" fi fi fi fi donefi这位仁兄的脚本写的特别好。直接执行即可。
2.3 确认删除成功
使用redis工具查看：
3.清理单机redis
flushall
4.总结
使用脚本删除redis集群中的数据。
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