Redis哨兵+keepalived高可用自动部署脚本实战

Redis哨兵+keepalived高可用自动部署脚本实战

小舔狗 2021-05-05 22:25:59 47 收藏
分类专栏： Shell Redis
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说明
这是redis sentinel加keepalived的自动部署脚本，redis sentinel负责redis的主从关系切换，keepalived负责整个redis sentinel中master的VIP提供
gitee链接：https://gitee.com/jiayu997/Redis-sentinel-autodeployment
支持yum在线安装与rpm包离线安装
支持操作系统
Centos7 64位

安装方法
准备好至少三台服务器, 三台服务器的配置文件一样, 设置好第一台后可以直接拷贝 config.conf 到其他服务器运行即可
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git clone git@gitee.com:jiayu997/redis-sentinel-autodeployment.git
cd redis-sentinel-autodeployment
cat config.txt

# Redis
MASTER_HOST=192.168.0.51 # 修改成你需要用作 master 的 redis 服务器 ip
REDIS_PORT=6379 # Redis 使用的端口
REDIS_PASSWORD=password # Redis 密码

# Redis Sentinel
SENTINEL_PORT=26379 # Sentinel 使用的端口
SENTINEL_NAME=mymaster # 集群名称
SENTINEL_QUORUM=1 # 集群服务器数量超过 3 个设置为 2
SENTINEL_NUMREPLICAS=1 # 主备切换时 1 个从节点不可使用

# Keepalived
INTERFACE=ens33 # 物理网卡名称
VIP=192.168.0.55 # Keepalived 集群 vip
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安装
支持yum在线安装，如果机器无法上外网，可选择rpm包，离线安装

./sentinel-keepalived.sh install
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启动
./sentinel-keepalived.sh start
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停止
./sentinel-keepalived.sh stop
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检查服务运行状态
./sentinel-keepalived.sh status
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卸载
./sentinel-keepalived.sh uninstall
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脚本如下
<<!
**********************************************************
* Author : jiayu997
* Email : qujiayu98@163.com
* Last modified : 2021-05-05 06:24
* Filename : sentinel-keepalived.sh
* Description : redis-sentinel automatic deployment script
* *******************************************************
!
#!/bin/bash
action=$1
BASE_DIR=$(cd $(dirname $0);pwd)
IS_YUM=1

function error_text(){
echo -e "[\033[31m ERROR \033[0m] $1"
}

function ok_text(){
echo -e "[\033[32m OK \033[0m] $1"
}

function init_security(){
systemctl disable firewalld --now &>/dev/null && systemctl disable NetworkManager --now &> /dev/null &&sed -i 's#SELINUX=enforcing#SELINUX=disabled#g' /etc/sysconfig/selinux && sed -i 's#SELINUX=enforcing#SELINUX=disabled#g' /etc/selinux/config && if [ $(getenforce) == "Enforcing" ]; then setenforce 0; fi
if [ $? -eq 0 ]; then
ok_text "firewalld,networkmanager,selinux have been disabled"
else
error_text "firewalld networkmanager,selinux disable error"
exit 1
fi
}

function check_user(){
# 检查当前身份是否为root
if [ $(id -u -n) != "root" ]; then
error_text "Please run this script by root"
exit 1
else
init_security
fi
}

function check_config(){
# 检查是否存在配置文件
if [ ! -f $BASE_DIR/config.txt ]; then
error_text "Not found config.txt,please cp config-example.txt config.txt"
exit 1
else
source $BASE_DIR/config.txt
ok_text "config.txt check ok"
fi
}

function check_os(){
# 检查当前操作系统
if [ -f /etc/redhat-release ]; then
osVersion=$(cat /etc/redhat-release|grep -oE '[0-9]+\.[0-9]'|awk -F '.' '{print $1}')
if [ $osVersion == "7" ]; then
if [ $(uname -m) != "x86_64" ]; then
error_text "Please run this script in Centos7 64"
exit 1
else
ok_text "os check ok"
fi
else
error_text "Please run this script in Centos7 64"
exit 1
fi
else
error_text "Please run this script in Centos7 64"
exit 1
fi

}

function check_network(){
ping -c 2 -i 0.5 -W 1 114.114.114.114 &>/dev/null && curl -I -k -L -s -w "%{http_code}\n" -o /dev/null https://mirrors.aliyun.com &>/dev/null
if [ $? -ne 0 ]; then
error_text "this machine cannot connect to the internet,will use offline installation"
IS_YUM=0
else
ok_text "network check ok"
fi
}

function check_yum(){
# 更新系统yum源
if [ ! -f /etc/yum.repos.d/CentOS-Base.repo -o ! -f /etc/yum.repos.d/epel.repo ]; then
curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo &>/dev/null && curl -o /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo &>/dev/null
if [ $? -ne 0 ]; then
error_text "yum update error,will use offline installation"
IS_YUM=0
else
ok_text "yum update ok"
fi
else
ok_text "yum already exist,don't need to update"
fi
}

function check_interface(){
# 检查网口是否存在
if [ ! -d /sys/class/net/$INTERFACE ]; then
error_text "Please use correct interface"
exit 1
else
ok_text "interface check ok"
fi
}

function check_vip(){
# 检查VIP是否被使用
ping -c 2 -i 0.5 -W 1 $VIP &>/dev/null
if [ $? -eq 0 ]; then
error_text "This IP has been already used by others Please change VIP"
exit 1
else
ok_text "vip check ok"
fi
}

function install_netstat(){
if [ ! -f $BASE_DIR/package/net-tools/net-tools-2.0-0.25.20131004git.el7.x86_64.rpm ]; then
error_text "net-tools rpm package is not exist,please download again"
else
rpm -ivh $BASE_DIR/package/net-tools/net-tools-2.0-0.25.20131004git.el7.x86_64.rpm &>/dev/null
if [ $? -eq 0 ]; then
ok_text "net-tools rpm package install ok"
else
error_text "net-tools rpm package install error"
exit 1
fi
fi
}

function check_port(){
# 使用的端口检查
if [ $(rpm -qa|grep net-tools|wc -l) -ne 1 ]; then
if [ $IS_YUM -eq 1 ]; then
yum -y install net-tools &>/dev/null
if [ $? -eq 0 ]; then
ok_text "net-tools install ok"
else
error_text "yum install net-tools error"
IS_YUM=0
install_netstat
fi
else
install_netstat
fi
else
ok_text "net-tools has been installed"
fi

if [ $(netstat -tunlp|grep -oE ':$REDIS_PORT'|grep -v grep|wc -l) -eq 0 ]; then
ok_text "redis port check ok"
else
error_text "redis port has already been used,please change another port"
exit 1
fi
if [ $(netstat -tunlp|grep -oE ':$SENTINEL_PORT'|grep -v grep|wc -l) -eq 0 ]; then
ok_text "sentinel port check ok"
else
error_text "sentinel port has already been used,please change another port"
exit 1
fi
}

function pre_install(){
check_user
check_config
check_os
check_interface
check_vip
if [ $IS_YUM -eq 1 ]; then
check_network
fi
if [ $IS_YUM -eq 1 ]; then
check_yum
fi
check_port
}

function config(){
source $BASE_DIR/config.txt #其他函数source的，只能在该函数中生效
# 备份redis配置文件
if [ ! -f /etc/redis.conf.bak ]; then
cp /etc/redis.conf /etc/redis.conf.bak
fi
if [ ! -f /etc/sentinel.conf.bak ]; then
cp /etc/redis-sentinel.conf /etc/redis-sentinel.conf.bak
fi

# 备份keepalived配置文件
if [ ! -f /etc/keepalived/keepalived.conf.bak ]; then
cp /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf.bak
fi

# 配置redis配置文件(根据需求自行添加)
sed -i "s@bind.*@bind 0.0.0.0@g" /etc/redis.conf
sed -i "s@protected-mode yes@protected-mode no@g" /etc/redis.conf
sed -i "s@daemonize no@daemonize yes@g" /etc/redis.conf
sed -i "s@timeout 0@timeout 5@g" /etc/redis.conf
sed -i "s@# repl-timeout 60@repl-timeout 60@g" /etc/redis.conf
sed -i "s@# repl-ping-replica-period 10@repl-ping-replica-period 10@g" /etc/redis.conf
sed -i "s@# requirepass foobared@requirepass $REDIS_PASSWORD@g" /etc/redis.conf
sed -i "s@# masterauth <master-password>@masterauth $REDIS_PASSWORD@g" /etc/redis.conf
if [ $REDIS_PORT -ne 6379 ]; then
sed -i "s@port 6379@port $REDIS_PORT@g" /etc/redis.conf
sed -i "s@^pidfile .*@pidfile /var/run/redis_$REDIS_PORT.pid@g" /etc/redis.conf
fi
if [ $(hostname -I|grep $MASTER_HOST|grep -v grep|wc -l) -eq 0 ]; then
sed -i "s@# replicaof <masterip> <masterport>@replicaof $MASTER_HOST $REDIS_PORT@g" /etc/redis.conf
fi
ok_text "redis config ok"

# 配置sentinel配置文件
sed -i "s@# protected-mode no@protected-mode no@g" /etc/redis-sentinel.conf
sed -i "s@daemonize no@daemonize yes@g" /etc/redis-sentinel.conf
sed -i "s@port 26379@port $SENTINEL_PORT@g" /etc/redis-sentinel.conf
sed -i "s@sentinel monitor mymaster 127.0.0.1 6379 2@sentinel monitor $SENTINEL_NAME $MASTER_HOST $REDIS_PORT $SENTINEL_QUORUM@g" /etc/redis-sentinel.conf
sed -i "s@sentinel parallel-syncs mymaster 1@sentinel parallel-syncs $SENTINEL_NAME $SENTINEL_NUMREPLICAS@g" /etc/redis-sentinel.conf
sed -i "s@# sentinel auth-pass mymaster MySUPER--secret-0123passw0rd@sentinel auth-pass $SENTINEL_NAME $REDIS_PASSWORD@g" /etc/redis-sentinel.conf
ok_text "sentinel config ok"

# 配置keepalived配置文件,前边不能有空格，否则会有问题,且不能写成cat <<EOF>file这种格式
cat >/etc/keepalived/keepalived.conf<<EOF
! Configuration File for keepalived
global_defs {
router_id LVS_DEVEL
script_user root
enable_script_security
vrrp_skip_check_adv_addr
vrrp_strict
vrrp_garp_interval 0
vrrp_gna_interval 0
}
vrrp_script sentinel_check {
script "/etc/keepalived/sentinel-check.sh 127.0.0.1 $REDIS_PORT $REDIS_PASSWORD"
interval 2
weight 10
fall 3
rise 1
}
vrrp_instance VI_1 {
state BACKUP
interface ens33
virtual_router_id 51
priority 100
advert_int 2
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.0.55/24
}
track_script {
sentinel_check
}
}
EOF

# EOF如果不加双引号，会执行里面的命令
cat >/etc/keepalived/sentinel-check.sh<<"EOF"
#!/bin/bash
if [ -z "$(redis-cli -h $1 -p $2 -a $3 info|grep role:master)" ]; then
exit 1
else
exit 0
fi
EOF
# echo -e '#!/bin/bash\nif [ -z "$(redis-cli -h $1 -p $2 -a $3 info|grep role:master)" ]; then\n\texit 1\nelse\n\texit 0\nfi' >/tmp/test ,if用了-z,需要加字符串
#chmod 644 /etc/keepalived/* #配置文件只能是644,否则报错
chmod a+x /etc/keepalived/sentinel-check.sh
chmod 755 /etc/redis.conf # yum安装的redis,在systemd文件中指定了以redis用户运行
chmod 755 /etc/redis-sentinel.conf
ok_text "redis,sentinel,keepalived config is ok"
ok_text "redis,sentinel,keepalived have been configured"
echo -ne "[\033[32m Please Run:\033[0m]"
echo -ne "\033[33m./sentinel-keepalived.sh start redis-sentinel \033[0m\n"
}

function yum_install(){
# 检查源(redis-5),这里加个逻辑判断 #rpm -qa|grep epel-release && rpm -qa|grep ius-release
if [ $IS_YUM -eq 1 ]; then
yum install -y https://repo.ius.io/ius-release-el7.rpm https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm &>/dev/null
if [ $? -ne 0 ]; then
error_text "yum source update error"
exit 1
else
ok_text "yum source update ok"
fi
fi

# 安装redis
if [ $(rpm -qa|grep redis|grep -v grep|wc -l) -eq 0 ]; then
yum install -y redis5 &>/dev/null
if [ $? -ne 0 ]; then
error_text "redis install error"
exit 1
else
ok_text "redis install ok"
fi
else
if [ $(rpm -qa|grep redis|grep -oE "^redis5-[0-9]"|awk -F '-' '{print $2}') -eq 5 ]; then
ok_text "redis havs already been installed"
else
error_text "redis version is not compatible"
exit 1
fi
fi

# 安装keepalived
if [ $(rpm -qa|grep keepalived|grep -v grep|wc -l) -eq 0 ]; then
yum -y install keepalived &>/dev/null
if [ $? -eq 0 ]; then
ok_text "keepalived install ok"
else
error_text "keepalived install error"
eixt 1
fi
else
ok_text "keepalived has already been installed"
fi

# 安装后配置配置文件
config
}

function rpm_install(){
# 安装keepalived依赖包
if [ $(rpm -qa|grep keepalived|wc -l) -eq 0 ]; then
if [ ! -d $BASE_DIR/package/keepalived ]; then
error_text "keepalived package is not exist"
exit 1
else
if [ $(ls $BASE_DIR/package/keepalived|wc -l) -ne 32 ]; then
error_text "incorrect number of keepalived packets"
exit 1
fi
fi
yum -y localinstall $BASE_DIR/package/keepalived/* --disablerepo=\* --skip-broken &>/dev/null
keepalived -h &>/dev/null
if [ $? -eq 0 ]; then
ok_text "keepalived install ok"
else
error_text "keepalived install error,please install keepalived manually before run this shell"
exit 1
fi
else
ok_text "keepalived has been installed"
fi

# 安装redis5
if [ $(rpm -qa|grep redis5|wc -l) -eq 0 ]; then
if [ ! -f $BASE_DIR/package/redis/redis5-5.0.9-1.el7.ius.x86_64.rpm ]; then
error_text "redis5 package is not exist"
exit 1
fi
rpm -ivh $BASE_DIR/package/redis/redis5-5.0.9-1.el7.ius.x86_64.rpm &>/dev/null
if [ $? -eq 0 ]; then
ok_text "redis 5 install ok"
else
error_text "redis5 install error,please install redis5 manually before run this shell"
exit 1
fi
else
ok_text "redis5 has been installed"
fi

# 修改配置文件
config
}

function install(){
while :
do
echo -ne "[\033[32m Check \033[0m] The default is yum installation, Do you want to switch to offline installation [Y/N] "
read -n1 answer
echo
case $answer in
Y|y)
IS_YUM=0
break
;;
N|n)
IS_YUM=1
break
;;
*)
error_text "please input correct choice"
;;
esac
done
pre_install
if [ $IS_YUM -eq 1 ]; then
yum_install
else
rpm_install
fi
}

function stop(){
systemctl stop keepalived >/dev/null && systemctl stop redis >/dev/null && systemctl stop redis-sentinel >/dev/null
if [ $? -eq 0 ]; then
ok_text "keepalived,redis,redis-sentinel have been stoped"
else
error_text "keepalived,redis,redis-sentinel stop fail"
exit 1
fi
}

function start(){
# 启动redis
if [ -z "$(systemctl status redis|grep running)" ]; then
systemctl start redis &>/dev/null
if [ $? -eq 0 ]; then
ok_text "redis start ok"
else
error_text "redis start error"
eixt 1
fi
else
ok_text "redis has already been running,don't need to start"
fi

#启动redis-sentinel
if [ -z "$(systemctl status redis-sentinel|grep running)" ]; then
systemctl start redis-sentinel &>/dev/null
if [ $? -eq 0 ]; then
ok_text "redis-sentinel start ok"
else
error_text "redis-sentinel start error"
exit 1
fi
else
ok_text "redis-sentinel has already been running,don't need to start"
fi

# 启动keepalived
if [ -z "$(systemctl status keepalived|grep running)" ]; then
systemctl start keepalived &>/dev/null
if [ $? -eq 0 ]; then
ok_text "keepalived start ok"
else
error_text "keepalived start error"
exit 1
fi
else
ok_text "keepalived has already been running,don't need to start"
fi
}

function uninstall(){
stop
yum remove keepalived redis5
rm -rf /etc/keepalived/keepalived.conf
rm -rf /etc/redis.conf
rm -rf /etc/redis-sentinel.conf
}

function reset(){
uninstall
install
}

function status(){
source $BASE_DIR/config.txt
# 检查redis运行情况
echo -ne "Redis Service "
redis-cli -h 127.0.0.1 -p $REDIS_PORT -a $REDIS_PASSWORD info &>/dev/null
if [ $? -ne 0 ]; then
echo -e "[\033[31m ERROR \033[0m]"
else
echo -e "[\033[32m OK \033[0m]"
fi

# 检查sentinel运行情况
echo -ne "Sentinel Service "
redis-cli -h 127.0.0.1 -p $SENTINEL_PORT -a $REDIS_PASSWORD info &>/dev/null
if [ $? -ne 0 ]; then
echo -e "[\033[31m ERROR \033[0m]"
else
echo -e "[\033[32m OK \033[0m]"
fi

# 检查keepalived运行情况
echo -ne "Keepalived Service "
systemctl status keepalived|grep running &>/dev/null #如果grep到了,会返回0,如果没grep到，会返回非0
if [ $? -eq 0 ]; then
echo -e "[\033[32m OK \033[0m]"
else
echo -e "[\033[31m ERROR \033[0m]"
fi

# redis角色情况
echo -ne "Sedis Role "
if [ -z "$(hostname -I | grep $VIP)" ]; then
echo -e "[\033[32m role: slave \033[0m]"
else
echo -e "[\033[32m role: master \033[0m]"
fi
}

function restart(){
stop
start
}

function useage() {
echo -e "\033[32m***************************\033[0m"
echo -e "\033[32m--Redis哨兵高可用部署脚本--\033[0m"
echo "Usage: "
echo " install [COMMAND] ..."
echo " install --help"
echo "Commands: "
echo " install 安装 Redis"
echo " start 启动 Redis"
echo " stop 停止 Redis"
echo " status 检查 Redis"
echo " restart 重启 Redis"
echo " uninstall 卸载 Redis"
echo " reset 重置 Redis"
echo -e "\033[32m***************************\033[0m"
}

function main() {
case $action in
install)
install
;;
uninstall)
uninstall
;;
start)
start
;;
stop)
stop
;;
restart)
restart
;;
reset)
reset
;;
status)
status
;;
-h)
useage
;;
--help)
useage
;;
*)
useage
;;
esac
}
main
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版权声明：本文为CSDN博主「小舔狗」的原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/qq_41586875/article/details/116431523