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Redis集群搭建(主從模式、哨兵模式、集群模式)

 更新時間：2024年01月09日 12:02:35   作者：242030  
本文主要介紹了Redis集群搭建,主要包括主從模式、哨兵模式、集群模式這三種方式,文中通過示例代碼介紹的非常詳細(xì),對大家的學(xué)習(xí)或者工作具有一定的參考學(xué)習(xí)價(jià)值,需要的朋友們下面隨著小編來一起學(xué)習(xí)學(xué)習(xí)吧

1、主從模式部署

1.1 環(huán)境準(zhǔn)備

IP主機(jī)名角色
192.168.54.200mastermaster
192.168.54.201slave1slave1
192.168.54.202slave2slave2

1.2 下載

下載地址：http://download.redis.io/releases/

這里選擇下載：redis-7.0.3.tar.gz

1.3 上傳到服務(wù)器并且解壓(所有節(jié)點(diǎn))

# 解壓
tar -xf redis-7.0.3.tar.gz
cd redis-7.0.3
# 設(shè)置環(huán)境變量
echo "export REDIS_HOME=/home/zhangshixing/redis/redis-7.0.3">> /etc/profile
source /etc/profile

1.4 編譯安裝(所有節(jié)點(diǎn))

cd $REDIS_HOME
yum -y install gcc gcc++
make && make install
# 默認(rèn)安裝目錄 /usr/local/bin

1.5 配置成服務(wù)(所有節(jié)點(diǎn))

cat << EOF > /usr/lib/systemd/system/redis.service
[Unit]
Description=Redis persistent key-value database
After=network.target
After=network-online.target
Wants=network-online.target

[Service]
ExecStart=/usr/local/bin/redis-server /usr/local/redis/redis.conf --supervised systemd
ExecStop=/usr/libexec/redis-shutdown
Type=forking
User=redis
Group=redis
RuntimeDirectory=redis
RuntimeDirectoryMode=0755
LimitNOFILE=65536
PrivateTmp=true

[Install]
WantedBy=multi-user.target
EOF

配置描述：

Description: # 描述服務(wù) 
After: # 描述服務(wù)類別 
[Service]: # 服務(wù)運(yùn)行參數(shù)的設(shè)置 
Type=forking: # 是后臺運(yùn)行的形式 
ExecStart: # 為服務(wù)的具體運(yùn)行命令 
ExecReload: # 為重啟命令 
ExecStop: # 為停止命令 
LimitNOFILE=65536: # 打開文件數(shù)和進(jìn)程數(shù)有限制,默認(rèn)限制為1024,如果不設(shè)置,或者設(shè)置為LimitNOFILE=unlimited(不識別),則得到了1024
PrivateTmp=True: # 表示給服務(wù)分配獨(dú)立的臨時空間
#【注意】[Service]的啟動、重啟、停止命令全部要求使用絕對路徑 
[Install]: # 運(yùn)行級別下服務(wù)安裝的相關(guān)設(shè)置,可設(shè)置為多用戶,即系統(tǒng)運(yùn)行級別為3

# 重載系統(tǒng)服務(wù)
systemctl daemon-reload

/usr/libexec/redis-shutdown的內(nèi)容：

#!/bin/bash
#
# Wrapper to close properly redis and sentinel
test x"$REDIS_DEBUG" != x && set -x

REDIS_CLI=/usr/local/bin/redis-cli

# Retrieve service name
SERVICE_NAME="$1"
if [ -z "$SERVICE_NAME" ]; then
   SERVICE_NAME=redis
fi

# Get the proper config file based on service name
CONFIG_FILE="/usr/local/redis/$SERVICE_NAME.conf"

# Use awk to retrieve host, port from config file
HOST=`awk '/^[[:blank:]]*bind/ { print $2 }' $CONFIG_FILE | tail -n1`
PORT=`awk '/^[[:blank:]]*port/ { print $2 }' $CONFIG_FILE | tail -n1`
PASS=`awk '/^[[:blank:]]*requirepass/ { print $2 }' $CONFIG_FILE | tail -n1`
SOCK=`awk '/^[[:blank:]]*unixsocket\s/ { print $2 }' $CONFIG_FILE | tail -n1`

# Just in case, use default host, port
HOST=${HOST:-127.0.0.1}
if [ "$SERVICE_NAME" = redis ]; then
    PORT=${PORT:-6379}
else
    PORT=${PORT:-26739}
fi

# Setup additional parameters
# e.g password-protected redis instances
[ -z "$PASS"  ] || ADDITIONAL_PARAMS="-a $PASS"

# shutdown the service properly
if [ -e "$SOCK" ] ; then
        $REDIS_CLI -s $SOCK $ADDITIONAL_PARAMS shutdown
else
        $REDIS_CLI -h $HOST -p $PORT $ADDITIONAL_PARAMS shutdown
fi

配置完就可以通過systemctl啟停redis了。

1.6 授權(quán)啟動服務(wù)(所有節(jié)點(diǎn))

chmod +x /usr/libexec/redis-shutdown

useradd -s /sbin/nologin redis

mkdir /usr/local/redis ; cp $REDIS_HOME/redis.conf /usr/local/redis/ && chown -R redis:redis /usr/local/redis

mkdir -p /opt/software/redis-7.0.3/data && chown -R redis:redis /opt/software/redis-7.0.3/data

# 命令補(bǔ)全
yum install -y bash-completion && source /etc/profile                 

systemctl daemon-reload

systemctl enable redis

1.7 修改linux內(nèi)核參數(shù)(所有節(jié)點(diǎn))

# 臨時生效
sysctl  -w  vm.overcommit_memory=1
# 永久生效
echo 'vm.overcommit_memory=1' >> /etc/sysctl.conf && sysctl -p
# 可選值：0,1,2。
# 0: 表示內(nèi)核將檢查是否有足夠的可用內(nèi)存供應(yīng)用進(jìn)程使用;如果有足夠的可用內(nèi)存,內(nèi)存申請?jiān)试S;否則,內(nèi)存申請失敗,并把錯誤返回給應(yīng)用進(jìn)程。
# 1: 表示內(nèi)核允許分配所有的物理內(nèi)存,而不管當(dāng)前的內(nèi)存狀態(tài)如何。
# 2: 表示內(nèi)核允許分配超過所有物理內(nèi)存和交換空間總和的內(nèi)存。

1.8 配置(redis.conf)

1.8.1 master節(jié)點(diǎn)配置

修改配置如下：

vi /usr/local/redis/redis.conf

bind 192.168.54.200               # 監(jiān)聽ip,多個ip用空格分隔
daemonize yes               # 允許后臺啟動
logfile "/usr/local/redis/redis.log"                # 日志路徑
dir /opt/software/redis-7.0.3/data                 # 數(shù)據(jù)庫備份文件存放目錄
masterauth 123456               # slave連接master密碼,master可省略
requirepass 123456              # 設(shè)置master連接密碼,slave可省略
appendonly yes                  # 在/opt/software/redis-7.0.3/data目錄生成appendonly.aof文件，將每一次寫操作請求都追加到appendonly.aof 文件中

1.8.2 slave1節(jié)點(diǎn)配置

修改配置如下：

vi /usr/local/redis/redis.conf

bind 192.168.182.201               # 監(jiān)聽ip,多個ip用空格分隔
daemonize yes               # 允許后臺啟動
logfile "/usr/local/redis/redis.log"                # 日志路徑
dir /opt/software/redis-7.0.3/data                 # 數(shù)據(jù)庫備份文件存放目錄
#  replicaof用于追隨某個節(jié)點(diǎn)的redis,被追隨的節(jié)點(diǎn)為主節(jié)點(diǎn),追隨的為從節(jié)點(diǎn),就是設(shè)置master節(jié)點(diǎn)
replicaof 192.168.182.200 6379
masterauth 123456               # slave連接master密碼，master可省略
requirepass 123456              # 設(shè)置master連接密碼，slave可省略
appendonly yes                  # 在/opt/software/redis-7.0.3/data目錄生成appendonly.aof文件，將每一次寫操作請求都追加到appendonly.aof 文件中

1.8.3 slave2節(jié)點(diǎn)配置

修改配置如下：

vi /usr/local/redis/redis.conf

bind 192.168.182.202               # 監(jiān)聽ip，多個ip用空格分隔
daemonize yes               # 允許后臺啟動
logfile "/usr/local/redis/redis.log"                # 日志路徑
dir /opt/software/redis-7.0.3/data                 # 數(shù)據(jù)庫備份文件存放目錄
#  replicaof用于追隨某個節(jié)點(diǎn)的redis,被追隨的節(jié)點(diǎn)為主節(jié)點(diǎn),追隨的為從節(jié)點(diǎn),就是設(shè)置master節(jié)點(diǎn)
replicaof 192.168.182.200 6379
masterauth 123456               # slave連接master密碼，master可省略
requirepass 123456              # 設(shè)置master連接密碼，slave可省略
appendonly yes                  # 在/opt/software/redis-7.0.3/data目錄生成appendonly.aof文件，將每一次寫操作請求都追加到appendonly.aof 文件中

1.9 啟動Redis服務(wù)(所有節(jié)點(diǎn))

systemctl start redis
systemctl status redis

1.10 查看集群狀態(tài)

# 交互式
[root@master redis]# redis-cli -h 192.168.54.200 -a 123456
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
192.168.54.200:6379> info replication
# Replication
role:master
connected_slaves:2
slave0:ip=192.168.54.201,port=6379,state=online,offset=1204,lag=0
slave1:ip=192.168.54.202,port=6379,state=online,offset=1204,lag=1
master_failover_state:no-failover
master_replid:e85f46b61089c38974769a2faa2fb905d4efc66f
master_replid2:0000000000000000000000000000000000000000
master_repl_offset:1204
second_repl_offset:-1
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:1
repl_backlog_histlen:1204

# 非交互式
[root@master redis]# redis-cli -h 192.168.54.200 -a 123456 info replication
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
# Replication
role:master
connected_slaves:2
slave0:ip=192.168.54.201,port=6379,state=online,offset=1288,lag=1
slave1:ip=192.168.54.202,port=6379,state=online,offset=1288,lag=1
master_failover_state:no-failover
master_replid:e85f46b61089c38974769a2faa2fb905d4efc66f
master_replid2:0000000000000000000000000000000000000000
master_repl_offset:1288
second_repl_offset:-1
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:1
repl_backlog_histlen:1288

# 交互式
[root@master redis]# redis-cli -h 192.168.54.200 -a 123456
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
192.168.54.200:6379> auth 123456
OK
192.168.54.200:6379> info replication
# Replication
role:master
connected_slaves:2
slave0:ip=192.168.54.201,port=6379,state=online,offset=1372,lag=1
slave1:ip=192.168.54.202,port=6379,state=online,offset=1372,lag=1
master_failover_state:no-failover
master_replid:e85f46b61089c38974769a2faa2fb905d4efc66f
master_replid2:0000000000000000000000000000000000000000
master_repl_offset:1372
second_repl_offset:-1
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:1
repl_backlog_histlen:1372

在這里Redis的主從模式就部署完了（一主兩從）。

2、Sentinel(哨兵)模式部署

2.1 環(huán)境準(zhǔn)備

IP主機(jī)名角色
192.168.54.200mastermaster,Sentinel
192.168.54.201slave1slave1,Sentinel
192.168.54.202slave2slave2,Sentinel

【溫馨提示】 sentinel 最好跟redis部署在不同的機(jī)器上，sentinel 端口：26379。

2.2 配置sentinel(所有節(jié)點(diǎn))

【溫馨提示】前面已經(jīng)安裝過了redis主從模式了，因?yàn)樯诒Ｊ绞腔谥鲝哪Ｊ降模詒edis的配置這里就省略

了，直接修改sentinel配置文件，配置3個哨兵，每個哨兵的配置都是一樣的。

# 三個節(jié)點(diǎn)創(chuàng)建存儲目錄
mkdir /opt/software/redis-7.0.3/sentinel; chown -R redis:redis /opt/software/redis-7.0.3/sentinel

cat >/usr/local/redis/sentinel.conf<<EOF
daemonize yes
logfile "/usr/local/redis/sentinel.log"
# sentinel工作目錄
dir "/opt/software/redis-7.0.3/sentinel"
# 判斷master失效至少需要2個sentinel同意，建議設(shè)置為n/2+1,n為sentinel個數(shù)
# sentinel monitor <master-name> <ip> <port> <count>
sentinel monitor mymaster 192.168.54.200 6379 2
sentinel auth-pass mymaster 123456
# 判斷master主觀下線時間，默認(rèn)30s
sentinel down-after-milliseconds mymaster 30000
EOF

2.3 啟動sentinel(所有節(jié)點(diǎn))

nohup /usr/local/bin/redis-sentinel /usr/local/redis/sentinel.conf >> nohup.out 2>&1 &
netstat -tnlp|grep 26379

2.4 模擬故障測試

# 停掉master
systemctl stop redis
redis-cli -h 192.168.54.201 -a 123456 info replication

[root@master redis]# redis-cli -h 192.168.54.201 -a 123456 info replication
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
# Replication
role:slave
master_host:192.168.54.200
master_port:6379
master_link_status:down
master_last_io_seconds_ago:-1
master_sync_in_progress:0
slave_read_repl_offset:20712
slave_repl_offset:20712
master_link_down_since_seconds:18
slave_priority:100
slave_read_only:1
replica_announced:1
connected_slaves:0
master_failover_state:no-failover
master_replid:e85f46b61089c38974769a2faa2fb905d4efc66f
master_replid2:0000000000000000000000000000000000000000
master_repl_offset:20712
second_repl_offset:-1
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:1
repl_backlog_histlen:20712

[root@master redis]# redis-cli -h 192.168.54.201 -a 123456 info replication
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
# Replication
role:slave
master_host:192.168.54.202
master_port:6379
master_link_status:up
master_last_io_seconds_ago:1
master_sync_in_progress:0
slave_read_repl_offset:29371
slave_repl_offset:29371
slave_priority:100
slave_read_only:1
replica_announced:1
connected_slaves:0
master_failover_state:no-failover
master_replid:7a7fe0a8528e0c7913d5d54bc5ba633ab6879a8c
master_replid2:e85f46b61089c38974769a2faa2fb905d4efc66f
master_repl_offset:29371
second_repl_offset:20713
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:1
repl_backlog_histlen:29371

發(fā)現(xiàn)master節(jié)點(diǎn)已經(jīng)切換到其它節(jié)點(diǎn)了，再測試一下讀寫：

[root@master redis]# redis-cli -h 192.168.54.202 -a 123456
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
192.168.54.202:6379> set k2 v2
OK

新的master節(jié)點(diǎn)寫能力也正常，接下來就是恢復(fù)故障了。

# 啟動master
systemctl start redis
redis-cli -h 192.168.54.202 -a 123456 info replication

[root@master redis]# redis-cli -h 192.168.54.202 -a 123456 info replication
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
# Replication
role:master
connected_slaves:2
slave0:ip=192.168.54.201,port=6379,state=online,offset=70444,lag=0
slave1:ip=192.168.54.200,port=6379,state=online,offset=70444,lag=0
master_failover_state:no-failover
master_replid:7a7fe0a8528e0c7913d5d54bc5ba633ab6879a8c
master_replid2:e85f46b61089c38974769a2faa2fb905d4efc66f
master_repl_offset:70587
second_repl_offset:20713
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:869
repl_backlog_histlen:69719

發(fā)現(xiàn)就算原先的master節(jié)點(diǎn)恢復(fù)了，也不會切換到master角色，而是作為slave角色。

3、Cluster模式部署

使用集群，只需要將redis配置文件中的cluster-enable配置打開即可。

3.1 環(huán)境準(zhǔn)備

IP端口節(jié)點(diǎn)
192.168.54.2007001,7002,7003node1
192.168.54.2017001,7002,7003node2
192.168.54.2027001,7002,7003node3

3.2 修改配置(所有節(jié)點(diǎn))

【溫馨提示】這里是基于主從模式的配置修改，不是基于主從模式部署，哨兵模式是基于主從模式部署。

# 創(chuàng)建存儲目錄
mkdir -p /opt/software/redis-7.0.3/cluster/redis_{7001..7003}
cp /usr/local/redis/redis.conf /usr/local/redis/cluster_redis_7001.conf
cp /usr/local/redis/redis.conf /usr/local/redis/cluster_redis_7002.conf
cp /usr/local/redis/redis.conf /usr/local/redis/cluster_redis_7003.conf

chown -R redis:redis /usr/local/redis ;chown -R redis:redis /opt/software/redis-7.0.3/cluster

修改配置文件/usr/local/redis/cluster_redis_7001.conf

# 【注意】節(jié)點(diǎn)不一樣，IP不一樣，記得修改這個bind配置
bind 192.168.54.200
port 7001
daemonize yes
pidfile "/var/run/cluster_redis_7001.pid"
logfile "/usr/local/redis/cluster_redis_7001.log"
dir "/opt/software/redis-7.0.3/cluster/redis_7001"
masterauth "123456"
requirepass "123456"
# replicaof 192.168.54.202 6379
appendonly yes
# 開啟集群模式
cluster-enabled yes
# 雖然此配置的名字叫"集群配置文件"，但是此配置文件不能人工編輯，它是集群節(jié)點(diǎn)自動維護(hù)的文件，主要用于記錄集群中有哪些節(jié)點(diǎn)、他們的狀態(tài)以及一些持久化參數(shù)等，方便在重啟時恢復(fù)這些狀態(tài)。通常是在收到請求之后這個文件就會被更新。
cluster-config-file nodes_7001.conf
cluster-node-timeout 15000

修改配置文件/usr/local/redis/cluster_redis_7002.conf

# 【注意】節(jié)點(diǎn)不一樣，IP不一樣，記得修改這個bind配置
bind 192.168.54.200
port 7002
daemonize yes
pidfile "/var/run/cluster_redis_7002.pid"
logfile "/usr/local/redis/cluster_redis_7002.log"
dir "/opt/software/redis-7.0.3/cluster/redis_7002"
masterauth "123456"
requirepass "123456"
# replicaof 192.168.54.202 6379
appendonly yes
# 配置yes則開啟集群功能，此redis實(shí)例作為集群的一個節(jié)點(diǎn)，否則，它是一個普通的單一的redis實(shí)例。
cluster-enabled yes
# 雖然此配置的名字叫"集群配置文件"，但是此配置文件不能人工編輯，它是集群節(jié)點(diǎn)自動維護(hù)的文件，主要用于記錄集群中有哪些節(jié)點(diǎn)、他們的狀態(tài)以及一些持久化參數(shù)等，方便在重啟時恢復(fù)這些狀態(tài)。通常是在收到請求之后這個文件就會被更新。
cluster-config-file nodes_7002.conf
cluster-node-timeout 15000

修改配置文件/usr/local/redis/cluster_redis_7002.conf

# 【注意】節(jié)點(diǎn)不一樣，IP不一樣，記得修改這個bind配置
bind 192.168.54.200
port 7003
daemonize yes
pidfile "/var/run/cluster_redis_7003.pid"
logfile "/usr/local/redis/cluster_redis_7003.log"
dir "/opt/software/redis-7.0.3/cluster/redis_7003"
masterauth "123456"
requirepass "123456"
# replicaof 192.168.54.202 6379
appendonly yes
# 配置yes則開啟集群功能，此redis實(shí)例作為集群的一個節(jié)點(diǎn)，否則，它是一個普通的單一的redis實(shí)例。
cluster-enabled yes
# 雖然此配置的名字叫"集群配置文件"，但是此配置文件不能人工編輯，它是集群節(jié)點(diǎn)自動維護(hù)的文件，主要用于記錄集群中有哪些節(jié)點(diǎn)、他們的狀態(tài)以及一些持久化參數(shù)等，方便在重啟時恢復(fù)這些狀態(tài)。通常是在收到請求之后這個文件就會被更新。
cluster-config-file nodes_7003.conf
cluster-node-timeout 15000

其它兩臺機(jī)器配置與192.168.54.2000一致，只是ip不同，此處省略。

# 將配置copy到另外兩個節(jié)點(diǎn)
scp -r /usr/local/redis/cluster_redis_{7001..7003}.conf 192.168.54.201:/usr/local/redis/
scp -r /usr/local/redis/cluster_redis_{7001..7003}.conf 192.168.54.202:/usr/local/redis/

# 在node2上執(zhí)行
sed -i 's/192.168.54.200/192.168.54.201/g' /usr/local/redis/cluster_redis_{7001..7003}.conf

# 在node3上執(zhí)行
sed -i 's/192.168.54.200/192.168.54.202/g' /usr/local/redis/cluster_redis_{7001..7003}.conf

3.3 啟動Redis服務(wù)(所有節(jié)點(diǎn))

nohup redis-server /usr/local/redis/cluster_redis_7001.conf >> nohup.out 2>&1 &
netstat -tnlp|grep 7001
nohup redis-server /usr/local/redis/cluster_redis_7002.conf >> nohup.out 2>&1 &
netstat -tnlp|grep 7002
nohup redis-server /usr/local/redis/cluster_redis_7003.conf >> nohup.out 2>&1 &
netstat -tnlp|grep 7003
tail -f /usr/local/redis/cluster_redis_7001.log
tail -f /usr/local/redis/cluster_redis_7002.log
tail -f /usr/local/redis/cluster_redis_7003.log

3.4 創(chuàng)建集群

# --cluster-replicas 2 : 表示集群的一個主節(jié)點(diǎn)有2個從節(jié)點(diǎn)，就是一主兩從模式
# 如果不加--cluster-replicas 2則會創(chuàng)建9個主節(jié)點(diǎn)
# --cluster / -c 告知redis-cli命令行工具，后續(xù)操作為cluster模式下
# --create 表示創(chuàng)建cluster模式
redis-cli -a 123456 --cluster create \
192.168.54.200:7001 192.168.54.200:7002 192.168.54.200:7003 \
192.168.54.201:7001 192.168.54.201:7002 192.168.54.201:7003 \
192.168.54.202:7001 192.168.54.202:7002 192.168.54.202:7003 \
--cluster-replicas 2

[root@master redis]# redis-cli -a 123456 --cluster create \
> 192.168.54.200:7001 192.168.54.200:7002 192.168.54.200:7003 \
> 192.168.54.201:7001 192.168.54.201:7002 192.168.54.201:7003 \
> 192.168.54.202:7001 192.168.54.202:7002 192.168.54.202:7003 \
> --cluster-replicas 2
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
>>> Performing hash slots allocation on 9 nodes...
Master[0] -> Slots 0 - 5460
Master[1] -> Slots 5461 - 10922
Master[2] -> Slots 10923 - 16383
Adding replica 192.168.54.201:7002 to 192.168.54.200:7001
Adding replica 192.168.54.202:7002 to 192.168.54.200:7001
Adding replica 192.168.54.200:7003 to 192.168.54.201:7001
Adding replica 192.168.54.202:7003 to 192.168.54.201:7001
Adding replica 192.168.54.201:7003 to 192.168.54.202:7001
Adding replica 192.168.54.200:7002 to 192.168.54.202:7001
M: d88cfb0ee3c53547ce7f1f237655fbd3cd6a7a42 192.168.54.200:7001
   slots:[0-5460] (5461 slots) master
S: 6999efc73a2d128d8583139074929fa144f43d78 192.168.54.200:7002
   replicates 41d651cdefd81e8b2249cf9a99d151920a2e793e
S: 0adc0cb28eb662df3f139ee4a6752d187297a443 192.168.54.200:7003
   replicates 358f827f29b05016fb1f57c88cbdeb7dbfc613f5
M: 358f827f29b05016fb1f57c88cbdeb7dbfc613f5 192.168.54.201:7001
   slots:[5461-10922] (5462 slots) master
S: 18c654e7a1df333c456aa119a2cf36a0c8272165 192.168.54.201:7002
   replicates d88cfb0ee3c53547ce7f1f237655fbd3cd6a7a42
S: 9e95afd03e0b3e019ff81e5dcf78f962830bca69 192.168.54.201:7003
   replicates 41d651cdefd81e8b2249cf9a99d151920a2e793e
M: 41d651cdefd81e8b2249cf9a99d151920a2e793e 192.168.54.202:7001
   slots:[10923-16383] (5461 slots) master
S: ee7300d10e1fd6f52b221b639367e9a6d55d85d5 192.168.54.202:7002
   replicates d88cfb0ee3c53547ce7f1f237655fbd3cd6a7a42
S: bdadcef4ac56abebb545c0cb69c509f8a7491bef 192.168.54.202:7003
   replicates 358f827f29b05016fb1f57c88cbdeb7dbfc613f5
Can I set the above configuration? (type 'yes' to accept): yes
>>> Nodes configuration updated
>>> Assign a different config epoch to each node
>>> Sending CLUSTER MEET messages to join the cluster
Waiting for the cluster to join
.
>>> Performing Cluster Check (using node 192.168.54.200:7001)
M: d88cfb0ee3c53547ce7f1f237655fbd3cd6a7a42 192.168.54.200:7001
   slots:[0-5460] (5461 slots) master
   2 additional replica(s)
S: 18c654e7a1df333c456aa119a2cf36a0c8272165 192.168.54.201:7002
   slots: (0 slots) slave
   replicates d88cfb0ee3c53547ce7f1f237655fbd3cd6a7a42
S: 0adc0cb28eb662df3f139ee4a6752d187297a443 192.168.54.200:7003
   slots: (0 slots) slave
   replicates 358f827f29b05016fb1f57c88cbdeb7dbfc613f5
S: bdadcef4ac56abebb545c0cb69c509f8a7491bef 192.168.54.202:7003
   slots: (0 slots) slave
   replicates 358f827f29b05016fb1f57c88cbdeb7dbfc613f5
M: 358f827f29b05016fb1f57c88cbdeb7dbfc613f5 192.168.54.201:7001
   slots:[5461-10922] (5462 slots) master
   2 additional replica(s)
M: 41d651cdefd81e8b2249cf9a99d151920a2e793e 192.168.54.202:7001
   slots:[10923-16383] (5461 slots) master
   2 additional replica(s)
S: 9e95afd03e0b3e019ff81e5dcf78f962830bca69 192.168.54.201:7003
   slots: (0 slots) slave
   replicates 41d651cdefd81e8b2249cf9a99d151920a2e793e
S: 6999efc73a2d128d8583139074929fa144f43d78 192.168.54.200:7002
   slots: (0 slots) slave
   replicates 41d651cdefd81e8b2249cf9a99d151920a2e793e
S: ee7300d10e1fd6f52b221b639367e9a6d55d85d5 192.168.54.202:7002
   slots: (0 slots) slave
   replicates d88cfb0ee3c53547ce7f1f237655fbd3cd6a7a42
[OK] All nodes agree about slots configuration.
>>> Check for open slots...
>>> Check slots coverage...
[OK] All 16384 slots covered.

會自動生成nodes.conf文件

[root@master redis]# ll /opt/software/redis-7.0.3/cluster/redis_{7001..7003}
/opt/software/redis-7.0.3/cluster/redis_7001:
總用量 4
drwxr-xr-x. 2 root root  103 12月 20 16:48 appendonlydir
-rw-r--r--. 1 root root 1237 12月 20 16:49 nodes_7001.conf

/opt/software/redis-7.0.3/cluster/redis_7002:
總用量 8
drwxr-xr-x. 2 root root  103 12月 20 16:49 appendonlydir
-rw-r--r--. 1 root root  171 12月 20 16:49 dump.rdb
-rw-r--r--. 1 root root 1237 12月 20 16:49 nodes_7002.conf

/opt/software/redis-7.0.3/cluster/redis_7003:
總用量 8
drwxr-xr-x. 2 root root  103 12月 20 16:49 appendonlydir
-rw-r--r--. 1 root root  171 12月 20 16:49 dump.rdb
-rw-r--r--. 1 root root 1237 12月 20 16:49 nodes.conf

3.5 集群操作

3.5.1 登錄集群

redis-cli -c -h 192.168.54.200 -p 7001

3.5.2 查看集群信息

> auth 123456
> CLUSTER INFO

3.5.3 列出節(jié)點(diǎn)信息

> CLUSTER NODES

[root@master redis]# redis-cli -c -h 192.168.54.200 -p 7001
192.168.54.200:7001> auth 123456
OK
192.168.54.200:7001> CLUSTER INFO
cluster_state:ok
cluster_slots_assigned:16384
cluster_slots_ok:16384
cluster_slots_pfail:0
cluster_slots_fail:0
cluster_known_nodes:9
cluster_size:3
cluster_current_epoch:9
cluster_my_epoch:1
cluster_stats_messages_ping_sent:233
cluster_stats_messages_pong_sent:247
cluster_stats_messages_sent:480
cluster_stats_messages_ping_received:239
cluster_stats_messages_pong_received:233
cluster_stats_messages_meet_received:8
cluster_stats_messages_received:480
total_cluster_links_buffer_limit_exceeded:0
192.168.54.200:7001> CLUSTER NODES
18c654e7a1df333c456aa119a2cf36a0c8272165 192.168.54.201:7002@17002 slave d88cfb0ee3c53547ce7f1f237655fbd3cd6a7a42 0 1671526417098 1 connected
d88cfb0ee3c53547ce7f1f237655fbd3cd6a7a42 192.168.54.200:7001@17001 myself,master - 0 1671526415000 1 connected 0-5460
0adc0cb28eb662df3f139ee4a6752d187297a443 192.168.54.200:7003@17003 slave 358f827f29b05016fb1f57c88cbdeb7dbfc613f5 0 1671526419115 4 connected
bdadcef4ac56abebb545c0cb69c509f8a7491bef 192.168.54.202:7003@17003 slave 358f827f29b05016fb1f57c88cbdeb7dbfc613f5 0 1671526418107 4 connected
358f827f29b05016fb1f57c88cbdeb7dbfc613f5 192.168.54.201:7001@17001 master - 0 1671526417000 4 connected 5461-10922
41d651cdefd81e8b2249cf9a99d151920a2e793e 192.168.54.202:7001@17001 master - 0 1671526418000 7 connected 10923-16383
9e95afd03e0b3e019ff81e5dcf78f962830bca69 192.168.54.201:7003@17003 slave 41d651cdefd81e8b2249cf9a99d151920a2e793e 0 1671526419000 7 connected
6999efc73a2d128d8583139074929fa144f43d78 192.168.54.200:7002@17002 slave 41d651cdefd81e8b2249cf9a99d151920a2e793e 0 1671526418000 7 connected
ee7300d10e1fd6f52b221b639367e9a6d55d85d5 192.168.54.202:7002@17002 slave d88cfb0ee3c53547ce7f1f237655fbd3cd6a7a42 0 1671526416000 1 connected
192.168.54.200:7001>

3.5.4 增加節(jié)點(diǎn)

node1上增加一節(jié)點(diǎn)

【1】配置

# copy配置
cp /usr/local/redis/cluster_redis_7003.conf /usr/local/redis/cluster_redis_7004.conf
# 創(chuàng)建存儲目錄
mkdir /opt/software/redis-7.0.3/cluster/redis_7004

# 修改配置
vi /usr/local/redis/cluster_redis_7004.conf

bind 192.168.54.200
port 7004
daemonize yes
pidfile "/var/run/redis_7004.pid"
logfile "/usr/local/redis/cluster_redis_7004.log"
dir "/opt/software/redis-7.0.3/cluster/redis_7004"
#replicaof 192.168.182.110 6379
masterauth "123456"
requirepass "123456"
appendonly yes
cluster-enabled yes
cluster-config-file nodes_7004.conf
cluster-node-timeout 15000

# 授權(quán)
chown -R redis:redis /usr/local/redis && chown -R redis:redis /opt/software/redis-7.0.3/cluster/redis_7004

【2】啟動服務(wù)

nohup redis-server /usr/local/redis/cluster_redis_7004.conf >> nohup.out 2>&1 &
netstat -tnlp|grep 7004

【3】集群中增加節(jié)點(diǎn)

[root@local-168-182-110 ~]# redis-cli -c -h 192.168.54.200 -p 7001
> auth 123456
# 添加節(jié)點(diǎn)
> CLUSTER MEET 192.168.54.200 7004
# 查看節(jié)點(diǎn)信息
> CLUSTER NODES

[root@master redis]# redis-cli -c -h 192.168.54.200 -p 7001
192.168.54.200:7001> auth 123456
OK
192.168.54.200:7001> CLUSTER MEET 192.168.54.200 7004
OK
192.168.54.200:7001> CLUSTER NODES
a9b489648b4acc38bfc04499767f808b7208cb1f 192.168.54.200:7004@17004 master - 0 1671527132044 0 connected
18c654e7a1df333c456aa119a2cf36a0c8272165 192.168.54.201:7002@17002 slave d88cfb0ee3c53547ce7f1f237655fbd3cd6a7a42 0 1671527134063 1 connected
d88cfb0ee3c53547ce7f1f237655fbd3cd6a7a42 192.168.54.200:7001@17001 myself,master - 0 1671527131000 1 connected 0-5460
0adc0cb28eb662df3f139ee4a6752d187297a443 192.168.54.200:7003@17003 slave 358f827f29b05016fb1f57c88cbdeb7dbfc613f5 0 1671527132000 4 connected
bdadcef4ac56abebb545c0cb69c509f8a7491bef 192.168.54.202:7003@17003 slave 358f827f29b05016fb1f57c88cbdeb7dbfc613f5 0 1671527132000 4 connected
358f827f29b05016fb1f57c88cbdeb7dbfc613f5 192.168.54.201:7001@17001 master - 0 1671527133000 4 connected 5461-10922
41d651cdefd81e8b2249cf9a99d151920a2e793e 192.168.54.202:7001@17001 master - 0 1671527133567 7 connected 10923-16383
9e95afd03e0b3e019ff81e5dcf78f962830bca69 192.168.54.201:7003@17003 slave 41d651cdefd81e8b2249cf9a99d151920a2e793e 0 1671527132000 7 connected
6999efc73a2d128d8583139074929fa144f43d78 192.168.54.200:7002@17002 slave 41d651cdefd81e8b2249cf9a99d151920a2e793e 0 1671527133051 7 connected
ee7300d10e1fd6f52b221b639367e9a6d55d85d5 192.168.54.202:7002@17002 slave d88cfb0ee3c53547ce7f1f237655fbd3cd6a7a42 0 1671527131000 1 connected

可以看到，新增的節(jié)點(diǎn)都是以master身份加入集群的

【4】更換節(jié)點(diǎn)身份

將新增的192.168.54.200:7004節(jié)點(diǎn)身份改為192.168.54.200:7001的slave：

redis-cli -c -h 192.168.54.200 -p 7004
> auth 123456
# 改變節(jié)點(diǎn)類型
> cluster replicate d88cfb0ee3c53547ce7f1f237655fbd3cd6a7a42
> CLUSTER NODES

[root@master redis]# redis-cli -c -h 192.168.54.200 -p 7004
192.168.54.200:7004> auth 123456
OK
192.168.54.200:7004> CLUSTER NODES
18c654e7a1df333c456aa119a2cf36a0c8272165 192.168.54.201:7002@17002 slave d88cfb0ee3c53547ce7f1f237655fbd3cd6a7a42 0 1671527454000 1 connected
6999efc73a2d128d8583139074929fa144f43d78 192.168.54.200:7002@17002 slave 41d651cdefd81e8b2249cf9a99d151920a2e793e 0 1671527451000 7 connected
358f827f29b05016fb1f57c88cbdeb7dbfc613f5 192.168.54.201:7001@17001 master - 0 1671527452371 4 connected 5461-10922
d88cfb0ee3c53547ce7f1f237655fbd3cd6a7a42 192.168.54.200:7001@17001 master - 0 1671527455399 1 connected 0-5460
9e95afd03e0b3e019ff81e5dcf78f962830bca69 192.168.54.201:7003@17003 slave 41d651cdefd81e8b2249cf9a99d151920a2e793e 0 1671527454000 7 connected
41d651cdefd81e8b2249cf9a99d151920a2e793e 192.168.54.202:7001@17001 master - 0 1671527453000 7 connected 10923-16383
0adc0cb28eb662df3f139ee4a6752d187297a443 192.168.54.200:7003@17003 slave 358f827f29b05016fb1f57c88cbdeb7dbfc613f5 0 1671527453883 4 connected
a9b489648b4acc38bfc04499767f808b7208cb1f 192.168.54.200:7004@17004 myself,master - 0 1671527448000 0 connected
bdadcef4ac56abebb545c0cb69c509f8a7491bef 192.168.54.202:7003@17003 slave 358f827f29b05016fb1f57c88cbdeb7dbfc613f5 0 1671527451000 4 connected
ee7300d10e1fd6f52b221b639367e9a6d55d85d5 192.168.54.202:7002@17002 slave d88cfb0ee3c53547ce7f1f237655fbd3cd6a7a42 0 1671527455000 1 connected
192.168.54.200:7004> cluster replicate d88cfb0ee3c53547ce7f1f237655fbd3cd6a7a42
OK
192.168.54.200:7004> CLUSTER NODES
18c654e7a1df333c456aa119a2cf36a0c8272165 192.168.54.201:7002@17002 slave d88cfb0ee3c53547ce7f1f237655fbd3cd6a7a42 0 1671527488000 1 connected
6999efc73a2d128d8583139074929fa144f43d78 192.168.54.200:7002@17002 slave 41d651cdefd81e8b2249cf9a99d151920a2e793e 0 1671527490723 7 connected
358f827f29b05016fb1f57c88cbdeb7dbfc613f5 192.168.54.201:7001@17001 master - 0 1671527489000 4 connected 5461-10922
d88cfb0ee3c53547ce7f1f237655fbd3cd6a7a42 192.168.54.200:7001@17001 master - 0 1671527489713 1 connected 0-5460
9e95afd03e0b3e019ff81e5dcf78f962830bca69 192.168.54.201:7003@17003 slave 41d651cdefd81e8b2249cf9a99d151920a2e793e 0 1671527486675 7 connected
41d651cdefd81e8b2249cf9a99d151920a2e793e 192.168.54.202:7001@17001 master - 0 1671527489598 7 connected 10923-16383
0adc0cb28eb662df3f139ee4a6752d187297a443 192.168.54.200:7003@17003 slave 358f827f29b05016fb1f57c88cbdeb7dbfc613f5 0 1671527487000 4 connected
a9b489648b4acc38bfc04499767f808b7208cb1f 192.168.54.200:7004@17004 myself,slave d88cfb0ee3c53547ce7f1f237655fbd3cd6a7a42 0 1671527486000 1 connected
bdadcef4ac56abebb545c0cb69c509f8a7491bef 192.168.54.202:7003@17003 slave 358f827f29b05016fb1f57c88cbdeb7dbfc613f5 0 1671527487683 4 connected
ee7300d10e1fd6f52b221b639367e9a6d55d85d5 192.168.54.202:7002@17002 slave d88cfb0ee3c53547ce7f1f237655fbd3cd6a7a42 0 1671527488691 1 connected

3.5.5 刪除節(jié)點(diǎn)

redis-cli -c -h 192.168.54.200 -p 7001
> auth 123456
# 查看節(jié)點(diǎn)
> CLUSTER NODES
# 刪除節(jié)點(diǎn)
> CLUSTER FORGET a9b489648b4acc38bfc04499767f808b7208cb1f
# 檢查節(jié)點(diǎn)信息
> CLUSTER NODES

[root@master redis]# redis-cli -c -h 192.168.54.200 -p 7001
192.168.54.200:7001> auth 123456
OK
192.168.54.200:7001> CLUSTER NODES
a9b489648b4acc38bfc04499767f808b7208cb1f 192.168.54.200:7004@17004 slave d88cfb0ee3c53547ce7f1f237655fbd3cd6a7a42 0 1671527601411 1 connected
18c654e7a1df333c456aa119a2cf36a0c8272165 192.168.54.201:7002@17002 slave d88cfb0ee3c53547ce7f1f237655fbd3cd6a7a42 0 1671527598000 1 connected
d88cfb0ee3c53547ce7f1f237655fbd3cd6a7a42 192.168.54.200:7001@17001 myself,master - 0 1671527595000 1 connected 0-5460
0adc0cb28eb662df3f139ee4a6752d187297a443 192.168.54.200:7003@17003 slave 358f827f29b05016fb1f57c88cbdeb7dbfc613f5 0 1671527600403 4 connected
bdadcef4ac56abebb545c0cb69c509f8a7491bef 192.168.54.202:7003@17003 slave 358f827f29b05016fb1f57c88cbdeb7dbfc613f5 0 1671527599000 4 connected
358f827f29b05016fb1f57c88cbdeb7dbfc613f5 192.168.54.201:7001@17001 master - 0 1671527599393 4 connected 5461-10922
41d651cdefd81e8b2249cf9a99d151920a2e793e 192.168.54.202:7001@17001 master - 0 1671527598000 7 connected 10923-16383
9e95afd03e0b3e019ff81e5dcf78f962830bca69 192.168.54.201:7003@17003 slave 41d651cdefd81e8b2249cf9a99d151920a2e793e 0 1671527597374 7 connected
6999efc73a2d128d8583139074929fa144f43d78 192.168.54.200:7002@17002 slave 41d651cdefd81e8b2249cf9a99d151920a2e793e 0 1671527597000 7 connected
ee7300d10e1fd6f52b221b639367e9a6d55d85d5 192.168.54.202:7002@17002 slave d88cfb0ee3c53547ce7f1f237655fbd3cd6a7a42 0 1671527600000 1 connected
192.168.54.200:7001> CLUSTER FORGET a9b489648b4acc38bfc04499767f808b7208cb1f
OK
192.168.54.200:7001>
192.168.54.200:7001> CLUSTER NODES
18c654e7a1df333c456aa119a2cf36a0c8272165 192.168.54.201:7002@17002 slave d88cfb0ee3c53547ce7f1f237655fbd3cd6a7a42 0 1671527636743 1 connected
d88cfb0ee3c53547ce7f1f237655fbd3cd6a7a42 192.168.54.200:7001@17001 myself,master - 0 1671527636000 1 connected 0-5460
0adc0cb28eb662df3f139ee4a6752d187297a443 192.168.54.200:7003@17003 slave 358f827f29b05016fb1f57c88cbdeb7dbfc613f5 0 1671527635733 4 connected
bdadcef4ac56abebb545c0cb69c509f8a7491bef 192.168.54.202:7003@17003 slave 358f827f29b05016fb1f57c88cbdeb7dbfc613f5 0 1671527637753 4 connected
358f827f29b05016fb1f57c88cbdeb7dbfc613f5 192.168.54.201:7001@17001 master - 0 1671527635000 4 connected 5461-10922
41d651cdefd81e8b2249cf9a99d151920a2e793e 192.168.54.202:7001@17001 master - 0 1671527632000 7 connected 10923-16383
9e95afd03e0b3e019ff81e5dcf78f962830bca69 192.168.54.201:7003@17003 slave 41d651cdefd81e8b2249cf9a99d151920a2e793e 0 1671527634724 7 connected
6999efc73a2d128d8583139074929fa144f43d78 192.168.54.200:7002@17002 slave 41d651cdefd81e8b2249cf9a99d151920a2e793e 0 1671527635000 7 connected
ee7300d10e1fd6f52b221b639367e9a6d55d85d5 192.168.54.202:7002@17002 slave d88cfb0ee3c53547ce7f1f237655fbd3cd6a7a42 0 1671527632206 1 connected

3.5.6 保存配置

redis-cli -c -h 192.168.54.200 -p 7001
> auth 123456
# 將節(jié)點(diǎn)的配置文件保存到硬盤里面
> CLUSTER SAVECONFIG
> CLUSTER NODES

[root@master redis]# redis-cli -c -h 192.168.54.200 -p 7001
192.168.54.200:7001> auth 123456
OK
192.168.54.200:7001> CLUSTER SAVECONFIG
OK
192.168.54.200:7001> CLUSTER NODES
a9b489648b4acc38bfc04499767f808b7208cb1f 192.168.54.200:7004@17004 slave d88cfb0ee3c53547ce7f1f237655fbd3cd6a7a42 0 1671527763975 1 connected
18c654e7a1df333c456aa119a2cf36a0c8272165 192.168.54.201:7002@17002 slave d88cfb0ee3c53547ce7f1f237655fbd3cd6a7a42 0 1671527763000 1 connected
d88cfb0ee3c53547ce7f1f237655fbd3cd6a7a42 192.168.54.200:7001@17001 myself,master - 0 1671527762000 1 connected 0-5460
0adc0cb28eb662df3f139ee4a6752d187297a443 192.168.54.200:7003@17003 slave 358f827f29b05016fb1f57c88cbdeb7dbfc613f5 0 1671527760000 4 connected
bdadcef4ac56abebb545c0cb69c509f8a7491bef 192.168.54.202:7003@17003 slave 358f827f29b05016fb1f57c88cbdeb7dbfc613f5 0 1671527759929 4 connected
358f827f29b05016fb1f57c88cbdeb7dbfc613f5 192.168.54.201:7001@17001 master - 0 1671527759000 4 connected 5461-10922
41d651cdefd81e8b2249cf9a99d151920a2e793e 192.168.54.202:7001@17001 master - 0 1671527761000 7 connected 10923-16383
9e95afd03e0b3e019ff81e5dcf78f962830bca69 192.168.54.201:7003@17003 slave 41d651cdefd81e8b2249cf9a99d151920a2e793e 0 1671527762964 7 connected
6999efc73a2d128d8583139074929fa144f43d78 192.168.54.200:7002@17002 slave 41d651cdefd81e8b2249cf9a99d151920a2e793e 0 1671527762000 7 connected
ee7300d10e1fd6f52b221b639367e9a6d55d85d5 192.168.54.202:7002@17002 slave d88cfb0ee3c53547ce7f1f237655fbd3cd6a7a42 0 1671527761956 1 connected

可以看到，之前刪除的節(jié)點(diǎn)又恢復(fù)了，這是因?yàn)閷?yīng)的配置文件沒有刪除，執(zhí)行CLUSTER SAVECONFIG恢復(fù)。

3.5.7 模擬master節(jié)點(diǎn)掛掉

netstat -lntp |grep :7001|awk '{print $NF}'|cut -d '/' -f 1|xargs kill -9
redis-cli -c -h 192.168.54.201 -p 7001 -a 123456 CLUSTER NODES

[root@master redis]# redis-cli -c -h 192.168.54.201 -p 7001 -a 123456 CLUSTER NODES
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
6999efc73a2d128d8583139074929fa144f43d78 192.168.54.200:7002@17002 slave 41d651cdefd81e8b2249cf9a99d151920a2e793e 0 1671528090000 7 connected
bdadcef4ac56abebb545c0cb69c509f8a7491bef 192.168.54.202:7003@17003 slave 358f827f29b05016fb1f57c88cbdeb7dbfc613f5 0 1671528090000 4 connected
d88cfb0ee3c53547ce7f1f237655fbd3cd6a7a42 192.168.54.200:7001@17001 master,fail - 1671528024512 1671528017000 1 disconnected
9e95afd03e0b3e019ff81e5dcf78f962830bca69 192.168.54.201:7003@17003 slave 41d651cdefd81e8b2249cf9a99d151920a2e793e 0 1671528094858 7 connected
ee7300d10e1fd6f52b221b639367e9a6d55d85d5 192.168.54.202:7002@17002 slave a9b489648b4acc38bfc04499767f808b7208cb1f 0 1671528093000 10 connected
18c654e7a1df333c456aa119a2cf36a0c8272165 192.168.54.201:7002@17002 slave a9b489648b4acc38bfc04499767f808b7208cb1f 0 1671528093843 10 connected
41d651cdefd81e8b2249cf9a99d151920a2e793e 192.168.54.202:7001@17001 master - 0 1671528091000 7 connected 10923-16383
358f827f29b05016fb1f57c88cbdeb7dbfc613f5 192.168.54.201:7001@17001 myself,master - 0 1671528093000 4 connected 5461-10922
0adc0cb28eb662df3f139ee4a6752d187297a443 192.168.54.200:7003@17003 slave 358f827f29b05016fb1f57c88cbdeb7dbfc613f5 0 1671528092000 4 connected
a9b489648b4acc38bfc04499767f808b7208cb1f 192.168.54.200:7004@17004 master - 0 1671528092000 10 connected 0-5460

對應(yīng)192.168.54.200:7001的一行可以看到，master fail，狀態(tài)為disconnected；而對應(yīng)

192.168.54.200:7004的一行，slave已經(jīng)變成master。

【故障恢復(fù)】重新啟動192.168.54.200:7001節(jié)點(diǎn)

nohup redis-server /usr/local/redis/cluster_redis_7001.conf >> nohup.out 2>&1 &
redis-cli -c -h 192.168.54.201 -p 7001 -a 123456 CLUSTER NODES

[root@master redis]# redis-cli -c -h 192.168.54.201 -p 7001 -a 123456 CLUSTER NODES
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
6999efc73a2d128d8583139074929fa144f43d78 192.168.54.200:7002@17002 slave 41d651cdefd81e8b2249cf9a99d151920a2e793e 0 1671528205550 7 connected
bdadcef4ac56abebb545c0cb69c509f8a7491bef 192.168.54.202:7003@17003 slave 358f827f29b05016fb1f57c88cbdeb7dbfc613f5 0 1671528206457 4 connected
d88cfb0ee3c53547ce7f1f237655fbd3cd6a7a42 192.168.54.200:7001@17001 slave a9b489648b4acc38bfc04499767f808b7208cb1f 0 1671528206000 10 connected
9e95afd03e0b3e019ff81e5dcf78f962830bca69 192.168.54.201:7003@17003 slave 41d651cdefd81e8b2249cf9a99d151920a2e793e 0 1671528206000 7 connected
ee7300d10e1fd6f52b221b639367e9a6d55d85d5 192.168.54.202:7002@17002 slave a9b489648b4acc38bfc04499767f808b7208cb1f 0 1671528208475 10 connected
18c654e7a1df333c456aa119a2cf36a0c8272165 192.168.54.201:7002@17002 slave a9b489648b4acc38bfc04499767f808b7208cb1f 0 1671528206000 10 connected
41d651cdefd81e8b2249cf9a99d151920a2e793e 192.168.54.202:7001@17001 master - 0 1671528206558 7 connected 10923-16383
358f827f29b05016fb1f57c88cbdeb7dbfc613f5 192.168.54.201:7001@17001 myself,master - 0 1671528205000 4 connected 5461-10922
0adc0cb28eb662df3f139ee4a6752d187297a443 192.168.54.200:7003@17003 slave 358f827f29b05016fb1f57c88cbdeb7dbfc613f5 0 1671528207466 4 connected
a9b489648b4acc38bfc04499767f808b7208cb1f 192.168.54.200:7004@17004 master - 0 1671528206000 10 connected 0-5460

可以看到，192.168.54.200:7001節(jié)點(diǎn)啟動后為slave節(jié)點(diǎn)，并且是192.168.54.200:7004的slave節(jié)點(diǎn)。即

master節(jié)點(diǎn)如果掛掉，它的slave節(jié)點(diǎn)變?yōu)樾耺aster節(jié)點(diǎn)繼續(xù)對外提供服務(wù)，而原來的master節(jié)點(diǎn)如果重啟，則

變?yōu)樾耺aster節(jié)點(diǎn)的slave節(jié)點(diǎn)。

【溫馨提示】cluster不能選擇db，只能默認(rèn)db為0，所以select切庫相當(dāng)于是不能使用的。

4、簡單使用

4.1 集群常用操作

4.1.1 查看集群信息

# 打印集群的信息
cluster info
# 列出集群當(dāng)前已知的所有節(jié)點(diǎn)(node),以及這些節(jié)點(diǎn)的相關(guān)信息
cluster nodes

4.1.2 節(jié)點(diǎn)操作

# 將ip和port所指定的節(jié)點(diǎn)添加到集群當(dāng)中,讓它成為集群的一份子
cluster meet <ip> <port>
# 從集群中移除node_id指定的節(jié)點(diǎn)
cluster forget <node_id>
# 將當(dāng)前節(jié)點(diǎn)設(shè)置為node_id指定的節(jié)點(diǎn)的從節(jié)點(diǎn)
cluster replicate <node_id>
# 將節(jié)點(diǎn)的配置文件保存到硬盤里面
cluster saveconfig

4.1.3 槽(slot)

# 將一個或多個槽(slot)指派(assign)給當(dāng)前節(jié)點(diǎn)
cluster addslots <slot> [slot ...]
# 移除一個或多個槽對當(dāng)前節(jié)點(diǎn)的指派
cluster delslots <slot> [slot ...]
# 移除指派給當(dāng)前節(jié)點(diǎn)的所有槽,讓當(dāng)前節(jié)點(diǎn)變成一個沒有指派任何槽的節(jié)點(diǎn)
cluster flushslots
# 將槽slot指派給node_id指定的節(jié)點(diǎn),如果槽已經(jīng)指派給另一個節(jié)點(diǎn)
# 那么先讓另一個節(jié)點(diǎn)刪除該槽,然后再進(jìn)行指派
cluster setslot <slot> node <node_id>
# 將本節(jié)點(diǎn)的槽slot遷移到node_id指定的節(jié)點(diǎn)中
cluster setslot <slot> migrating <node_id>
# 從node_id指定的節(jié)點(diǎn)中導(dǎo)入槽slot到本節(jié)點(diǎn)
cluster setslot <slot> importing <node_id>
# 取消對槽slot的導(dǎo)入(import)或者遷移(migrate)
cluster setslot <slot> stable

4.1.4 鍵

# 計(jì)算鍵key應(yīng)該被放置在哪個槽上
cluster keyslot <key>
# 返回槽slot目前包含的鍵值對數(shù)量
cluster countkeysinslot <slot>
# 返回count個slot槽中的鍵
cluster getkeysinslot <slot> <count>

4.2 redis 常用操作

4.2.1 字符串(String)

# 登錄master節(jié)點(diǎn)，slave節(jié)點(diǎn)是只讀的
redis-cli -c -h 192.168.182.112 -p 7001
192.168.182.112:7001> auth 123456
OK
192.168.182.112:7001> set k1 v1
OK
192.168.182.112:7001> get k1
"v1"
# 獲取多個值
192.168.182.112:7001> mget k1 k2 k3
1) "v1"
2) "v2"
3) "v3"

4.2.2 哈希(Hash)

Redis hash 是一個 string 類型的 field（字段） 和 value（值） 的映射表，hash 特別適合用于存儲對象。

# 登錄master節(jié)點(diǎn)，slave節(jié)點(diǎn)是只讀的
redis-cli -c -h 192.168.182.112 -p 7001
192.168.182.112:7001> auth 123456
# 設(shè)置
192.168.182.112:7001> HSET myhash field1 "foo"
(integer) 1
# 獲取
192.168.182.112:7001> hget myhash field1
"foo"

4.2.3 列表(List)

Redis列表是簡單的字符串列表，按照插入順序排序。你可以添加一個元素到列表的頭部（左邊）或者尾部（右

邊）。

# 登錄master節(jié)點(diǎn),slave節(jié)點(diǎn)是只讀的
redis-cli -c -h 192.168.182.112 -p 7001
192.168.182.112:7001> auth 123456
192.168.182.112:7001> LPUSH larr v1
(integer) 1
192.168.182.112:7001> LPUSH larr v2
(integer) 2
192.168.182.112:7001> LPUSH larr v3
(integer) 3
# 獲取0到10個元素
192.168.182.112:7001> LRANGE larr  0 10
1) "v3"
2) "v2"
3) "v1"

4.2.4 集合(Set)

Redis 的 Set 是 String 類型的無序集合。集合成員是唯一的，這就意味著集合中不能出現(xiàn)重復(fù)的數(shù)據(jù)。

# 登錄master節(jié)點(diǎn),slave節(jié)點(diǎn)是只讀的
redis-cli -c -h 192.168.182.112 -p 7001
192.168.182.112:7001> auth 123456
192.168.182.112:7001> SADD myset "hello"
(integer) 1
192.168.182.112:7001> SADD myset "foo"
(integer) 1
# 已經(jīng)存在,則不能添加該元素
192.168.182.112:7001> SADD myset "hello"
(integer) 0
# 獲取
192.168.182.112:7001> SMEMBERS myset
1) "foo"
2) "hello"
192.168.182.112:6379>

4.2.5 有序集合(sorted set)

Redis 有序集合和集合一樣也是 string 類型元素的集合，且不允許重復(fù)的成員。不同的是每個元素都會關(guān)聯(lián)一個

double 類型的分?jǐn)?shù)。redis 正是通過分?jǐn)?shù)來為集合中的成員進(jìn)行從小到大的排序。有序集合的成員是唯一的，但

分?jǐn)?shù)(score)卻可以重復(fù)。

# 登錄master節(jié)點(diǎn),slave節(jié)點(diǎn)是只讀的
redis-cli -c -h 192.168.182.112 -p 7001
192.168.182.112:7001> auth 123456
192.168.182.112:7001> ZADD key1 1 redis
(integer) 1
192.168.182.112:7001> ZADD key1 2 mongodb
(integer) 1
192.168.182.112:7001> ZADD key1 3 mysql
(integer) 1
# 已經(jīng)存在,不能添加
192.168.182.112:7001> ZADD key1  3 mysql
(integer) 0
# 已經(jīng)存在,不能添加
192.168.182.112:7001> ZADD key1  4 mysql
(integer) 0
# 獲取數(shù)據(jù)
192.168.182.112:7001> ZRANGE key1  0 10 WITHSCORES
1) "redis"
2) "1"
3) "mongodb"
4) "2"
5) "mysql"
6) "4"

到此這篇關(guān)于Redis集群搭建(主從模式、哨兵模式、集群模式)的文章就介紹到這了,更多相關(guān)Redis集群搭建內(nèi)容請搜索腳本之家以前的文章或繼續(xù)瀏覽下面的相關(guān)文章希望大家以后多多支持腳本之家！

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