redis部署

一、部署包下载

直接从官网下载安装包，编译二进制；也可以从机器拷贝现有的

wget https://download.redis.io/releases/redis-6.2.9.tar.gz

# 解压
tar xvf redis-6.2.9.tar.gz

# 进行编译
cd  redis-6.2.9/
make && make install

# 确认相关编译的二进制; 
ls -al /usr/local/bin | grep redis

二、配置准备

 测试机器

172.28.112.75
172.28.112.66
172.28.112.87

redis.conf

线上服务密码待修改

# 原始默认的配置文件，配置项多，比较复杂
cd  redis-6.2.9
mkdir /etc/redis/ && cp redis.conf /etc/redis/redis.conf.bak

cat << EOF > /etc/redis/redis.conf
port 6379
bind 0.0.0.0
protected-mode no
requirepass "oyltest"
logfile "/var/log/redis/redis.log"
dbfilename "dump.rdb"
dir "/media/disk1/redis"
maxclients 100000
maxmemory 15gb
timeout 86400
tcp-keepalive 50
masterauth "oyltest"

# 从节点需要下列配置项
replicaof 172.28.112.75 6379
replica-read-only yes

EOF

sentinel.conf

集群名字

# 原始默认的配置文件，配置项多，比较复杂
cd  redis-6.2.9
cp sentinel.conf /etc/redis/sentinel.conf.bak


cat << EOF > /etc/redis/sentinel.conf
port 26379
protected-mode no
dir "/media/disk1/redis"
maxclients 100000
sentinel monitor oylcluster 172.28.112.75 6379 2
sentinel auth-pass oylcluster oyltest
sentinel down-after-milliseconds oylcluster 7000
sentinel failover-timeout oylcluster 30000
logfile "/var/log/redis/sentinel.log"
EOF

redis-shutdown

准备redis服务退出脚步

vim /usr/local/bin/redis-shutdown

#!/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="/etc/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


# 添加可执行权限
chmod +x /usr/local/bin/redis-shutdown

redis.service

# Redis 服务
cat << EOF > /etc/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 /etc/redis/redis.conf --supervised systemd
ExecStop=/usr/local/bin/redis-shutdown
Type=notify

[Install]
WantedBy=multi-user.target
EOF

sentinel.service

# sentinel 服务
cat << EOF > /etc/systemd/system/redis-sentinel.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-sentinel /etc/redis/sentinel.conf --supervised systemd
ExecStop=/usr/local/bin/redis-shutdown redis-sentinel
Type=notify

[Install]
WantedBy=multi-user.target
EOF

三、服务启动

redis部署&启动

systemctl daemon-reload
systemctl enable redis

mkdir -p /var/log/redis
mkdir -p /media/disk1/redis

systemctl stop redis
systemctl start redis
systemctl status redis

tail -f /var/log/redis/redis.log

sentinel部署&启动

# systemctl daemon-reload
systemctl enable redis-sentinel.service

systemctl stop redis-sentinel.service
systemctl start redis-sentinel.service
systemctl status redis-sentinel.service

tail -f /var/log/redis/sentinel.log

四、服务验证

集群状态、客户端连接

# /usr/local/bin/redis-cli -h 127.0.0.1
127.0.0.1:6379> AUTH oyltest
OK
127.0.0.1:6379> info

集群高可用，确认自动切换主从; 拉起后，故障节点自动切换为REPLICA角色

# 主节点
systemctl stop redis.service


systemctl start redis.service