新版本的redis 提供了快速搭建redis集群的脚本:这里以redis-6.2.6为例做演示:
https://download.redis.io/releases/redis-6.2.6.tar.gz
下载完成后,解压到/usr/local/redis
接下来开始编译和安装。
bash
make && make install
编译安装完成后:
bash
cd /usr/local/redis/utils/create-cluster
可以看到一个 名称为 create-cluster 的可执行脚本,编辑该脚本:
bash
#!/bin/bash
# Settings
BIN_PATH="../../src/"
CLUSTER_HOST=你的ip
# 表示每个节点端口号的前3为是多少
PORT=7000
TIMEOUT=2000
# 表示需要创建几个节点
NODES=6
REPLICAS=1
PROTECTED_MODE=no
# 默认为空字符串,这里你可以设置密码
ADDITIONAL_OPTIONS="--requirepass 123456 --masterauth 123456 --cluster-announce-ip 你的ip"
PASSWORD=123456
# You may want to put the above config parameters into config.sh in order to
# override the defaults without modifying this script.
if [ -a config.sh ]
then
source "config.sh"
fi
# Computed vars
ENDPORT=$((PORT+NODES))
if [ "$1" == "start" ]
then
while [ $((PORT < ENDPORT)) != "0" ]; do
PORT=$((PORT+1))
echo "Starting $PORT"
$BIN_PATH/redis-server --port $PORT --protected-mode $PROTECTED_MODE --cluster-enabled yes --cluster-config-file nodes-${PORT}.conf --cluster-node-timeout $TIMEOUT --appendonly yes --appendfilename appendonly-${PORT}.aof --dbfilename dump-${PORT}.rdb --logfile ${PORT}.log --daemonize yes ${ADDITIONAL_OPTIONS}
done
exit 0
fi
if [ "$1" == "create" ]
then
HOSTS=""
while [ $((PORT < ENDPORT)) != "0" ]; do
PORT=$((PORT+1))
HOSTS="$HOSTS $CLUSTER_HOST:$PORT"
done
# 客户端连接redis的一些参数配置,如果设置了密码,则需要添加
OPT_ARG="-a 123456"
if [ "$2" == "-f" ]; then
OPT_ARG="--cluster-yes"
fi
$BIN_PATH/redis-cli --cluster create $HOSTS --cluster-replicas $REPLICAS $OPT_ARG
exit 0
fi
if [ "$1" == "stop" ]
then
while [ $((PORT < ENDPORT)) != "0" ]; do
PORT=$((PORT+1))
echo "Stopping $PORT"
$BIN_PATH/redis-cli -p $PORT shutdown nosave
done
exit 0
fi
if [ "$1" == "watch" ]
then
PORT=$((PORT+1))
while [ 1 ]; do
clear
date
$BIN_PATH/redis-cli -p $PORT cluster nodes | head -30
sleep 1
done
exit 0
fi
if [ "$1" == "tail" ]
then
INSTANCE=$2
PORT=$((PORT+INSTANCE))
tail -f ${PORT}.log
exit 0
fi
if [ "$1" == "tailall" ]
then
tail -f *.log
exit 0
fi
if [ "$1" == "call" ]
then
while [ $((PORT < ENDPORT)) != "0" ]; do
PORT=$((PORT+1))
$BIN_PATH/redis-cli -p $PORT $2 $3 $4 $5 $6 $7 $8 $9
done
exit 0
fi
if [ "$1" == "clean" ]
then
rm -rf *.log
rm -rf appendonly*.aof
rm -rf dump*.rdb
rm -rf nodes*.conf
exit 0
fi
if [ "$1" == "clean-logs" ]
then
rm -rf *.log
exit 0
fi
echo "Usage: $0 [start|create|stop|watch|tail|clean|call]"
echo "start -- Launch Redis Cluster instances."
echo "create [-f] -- Create a cluster using redis-cli --cluster create."
echo "stop -- Stop Redis Cluster instances."
echo "watch -- Show CLUSTER NODES output (first 30 lines) of first node."
echo "tail <id> -- Run tail -f of instance at base port + ID."
echo "tailall -- Run tail -f for all the log files at once."
echo "clean -- Remove all instances data, logs, configs."
echo "clean-logs -- Remove just instances logs."
echo "call <cmd> -- Call a command (up to 7 arguments) on all nodes."
编辑完成后,我们执行
bash
./create-cluster start
此步骤会启动设定的各个redis节点

此时查看当前路径,已经多了许多文件,但是还没有完,目前只是启动了实例,但还没有完成集群创建。
bash
./create-cluster create
执行以上命令,将创建集群

注意此命令是一个交互型命令。在执行的过程中会询问你是否通过把 xx、xx、xx作为为主节点,把 xx、xx、xx作为它们的从节点,输入 yes 后会执行完成。
我们可以先使用 redis-cli 连接到集群,命令如下:
bash
redis-cli -c -p 7001 -a 123456
使用如下命令查看集群下各节点信息
bash
cluster nodes

create-cluster 搭建的方式虽然速度很快,但是该方式搭建的集群主从节点数量固定以及槽位分配模式固定,并且安装在同一台服务器上,所以只能用于测试环境。
我们测试完成之后,可以使用以下命令,关闭并清理集群:
bash
./create-cluster stop# 关闭集群
./create-cluster clean # 清理集群