詳解如何清理redis集群的所有數據
1. 背景:生產測試後redis中產生大量數據
生產前需要清理reids集群中的數據。、
你看有很多key呢:
使用工具
使用命令,查看是否有數據:
keys *
2. 清理步驟
2.1 任意登錄一臺redis機器
執行下面腳本:
clear_redis_cluster.sh 10.1.33.101:8001 redis
執行日志如下:
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內容
#!/bin/bash # Writed by yijian on 2018/8/20 # Batch to clear all nodes using FLUSHALL command # 用來清空一個redis集群中的所有數據,要求 FLUSHALL 命令可用, # 如果在 redis.conf 中使用 rename 改名瞭 FLUSHALL,則不能執行本腳本。 # 可帶兩個參數: # 1)參數1 集群中的任一可用節點(必須) # 2)連接redis的密碼(設置瞭密碼才需要) REDIS_CLI=${REDIS_CLI:-redis-cli} REDIS_IP=${REDIS_IP:-127.0.0.1} REDIS_PORT=${REDIS_PORT:-6379} # 顯示用法函數 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'" } # 檢查參數個數 if test $# -lt 1 -o $# -gt 2; then usage exit 1 fi # 第一個參數為集群中的節點, REDIS_NODE="$1" # 第二個參數為密碼 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 # 確保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
這位仁兄的腳本寫的特別好。直接執行即可。
2.3 確認刪除成功
使用redis工具查看:
3.清理單機redis
flushall
4.總結
使用腳本刪除redis集群中的數據。
記得地址哦:
https://github.com/eyjian/redis-tools/blob/master/clear_redis_cluster.sh
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