详解如何清理redis集群的所有数据
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2022-05-23 19:27:23
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...
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 started readonly you can't write against a read only replica. clearing 10.1.33.110:8026 ... background append only file rewriting started readonly you can't write against a read only replica. clearing 10.1.33.111:8027 ... background append only file rewriting started readonly you can't write against a read only replica. clearing 10.1.33.107:8007 ... background append only file rewriting started ok clearing 10.1.33.108:8024 ... background append only file rewriting started readonly you can't write against a read only replica. clearing 10.1.33.104:8020 ... background append only file rewriting started readonly you can't write against a read only replica. clearing 10.1.33.114:8014 ... background append only file rewriting started ok clearing 10.1.33.109:8025 ... background append only file rewriting started readonly you can't write against a read only replica. clearing 10.1.33.105:8005 ... background append only file rewriting started ok clearing 10.1.33.108:8008 ... background append only file rewriting started ok
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 1 fi # 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 1 fi # 确保redis-cli可用 echo "checking \`redis-cli\` ..." which "$redis_cli" > /dev/null 2>&1 if test $? -ne 0; then echo "command \`redis-cli\` is not exists or not executable." echo "you can set environment variable \`redis_cli\` to point to the redis-cli." echo "example: export redis_cli=/usr/local/bin/redis-cli" exit 1 fi if test -z "$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,$3); }'` fi if test -z "$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 fi else # 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 "$redis_node_port"; then # clear echo -e "clearing \033[1;33m${redis_node_ip}:${redis_node_port}\033[m ..." if test -z "$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 "$result" = "ok"; then echo -e "\033[0;32;32m$result\033[m" else echo -e "\033[0;32;31m$result\033[m" fi fi fi fi done fi
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。
记得地址哦:
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