Redis 主從切換+Predixy

部署環(huán)境

主機(jī)名	ip
redis-zhu	192.168.244.132
redis-cong	192.168.244.128

1.配置互信

兩臺(tái)主機(jī)都做
通過(guò)ssh-keygen 生成公鑰私鑰對(duì)，拷貝到兄弟節(jié)點(diǎn)； 
ssh-keygen
ssh-copy ip

2.Redis 包安裝及賬號(hào)設(shè)置

安裝Redis 包如低版本，可以直接官網(wǎng)下載rpm 包進(jìn)行安裝，會(huì)直接生成Redis 賬號(hào)及組；
如較新版本需要下載源碼tar.gz,解壓后自行編譯，同時(shí)需要手動(dòng)添加Redis
安裝依賴
yum -y install gcc gcc-c++ tcl
賬號(hào)及組;
groupadd redis
useradd -s /sbin/nologin  -g redis redis
Redis 下載到/opt下:
wget http://download.redis.io/releases/redis-5.0.8.tar.gz
tar -xzf redis-5.0.8.tar.gz
cd redis-5.0.8
make & make install
復(fù)制配置文件到/etc
cp /opt/redis-5.0.8/redix.conf /etc
cp /opt/redis-5.0.8/sentinel.conf /etc

系統(tǒng) 及 Redis參數(shù)配置

系統(tǒng) :

vi /etc/rc.local
echo never > /sys/kernel/mm/transparent_hugepage/enabled
echo never > /sys/kernel/mm/transparent_hugepage/defrag
echo 4096 > /proc/sys/net/core/somaxconn

vi /etc/sysctl.conf
vm.overcommit_memory = 1
net.core.somaxconn = 4096
sysctl -p

ulimit -SHn 100000

vi /etc/security/limits.conf

* soft nofile 100000
* hard nofile 100000
* soft nproc  64000
* hard nproc  64000

Redis: 參數(shù)配置

vim /etc/redix.conf
requirepass "wxIMtMRWw7104MSLitiowI4QCknkzFMV" #主上配置
masterauth "wxIMtMRWw7104MSLitiowI4QCknkzFMV"  #從上配置
bind 0.0.0.0
port 6380
maxmemory 3gb
dir "/redis/data"
save 900 1
save 300 10
save 60 10000
stop-writes-on-bgsave-error no
tcp-backlog 511
timeout 0
tcp-keepalive 300
pidfile "/var/run/redis.pid"
logfile "/var/log/redis/redis.log"

sentinel 配置：

vim /etc/sentinle.conf  #主配置
port 26380
daemonize yes
pidfile "/var/run/redis-sentinel.pid"
logfile "/opt/redis/data/sentinel.log"
dir "/tmp"
sentinel deny-scripts-reconfig yes
sentinel monitor mymaster 192.168.244.132 6380 1
sentinel config-epoch mymaster 5
sentinel leader-epoch mymaster 5
protected-mode no
sentinel current-epoch 5

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

vim /etc/sentinle.conf #從配置   
port 26380
daemonize yes
pidfile "/var/run/redis-sentinel.pid"
logfile "/opt/redis5/data/sentinel.log"
dir "/tmp"
sentinel deny-scripts-reconfig yes
sentinel monitor mymaster 192.168.244.132 6380 1
sentinel config-epoch mymaster 5
sentinel leader-epoch mymaster 5
protected-mode no
sentinel current-epoch 5

4.predixy 安裝

同Redis ,可以直接下載編譯后執(zhí)行文件或是下載源碼編譯；配置文件拷貝到固定目錄；
安裝依賴
yum install libstdc++-static -y
下載predixy 
git clone https://github.com/joyieldInc/predixy.git
cd predixy
編譯既可以
make
cp 執(zhí)行文件到bin目錄   
cp src/predixy /usr/local/bin/
cp配置文件到/etc/predixy（目錄需要?jiǎng)?chuàng)建）
cp predixy/conf/* /etc/predixy/

5. 配置Predixy

vim /etc/predixy/auth.conf
Authority {
    Auth {
        Mode write
    }
    Auth {
        Mode admin
    }
}


vim  /etc/predixy/predixy.conf
Name PredixyExample
WorkerThreads 1
ClientTimeout 300
LogVerbSample 0
LogDebugSample 0
LogInfoSample 10000
LogNoticeSample 1
LogWarnSample 1
LogErrorSample 1
Include auth.conf
Include sentinel.conf
Include latency.conf





vim /etc/predixy/sentinel.conf  
SentinelServerPool {
	    Pssword wxIMtMRWw7104MSLitiowI4QCknkzFMV
        Databases 16
        Hash crc16
        HashTag {}
        Distribution modula
        MasterReadPriority 60
        StaticSlaveReadPriority 50
        DynamicSlaveReadPriority 50
        RefreshInterval 1
        ServerTimeout 1
        ServerFailureLimit 1
        ServerRetryTimeout 1
        KeepAlive 120
        Sentinels {
           + 192.168.244.132:26380
           + 192.168.244.128:26380
        }
        Group mymaster {
          + 192.168.244.132:6380
          + 192.168.244.128:6380
        }
}




MasterReadPriority: 讀寫(xiě)分離功能，從redis master節(jié)點(diǎn)執(zhí)行讀請(qǐng)求的優(yōu)先級(jí)，為0則禁止讀redis master，不指定的話為50StaticSlaveReadPriority: 讀寫(xiě)分離功能，從靜態(tài)redis slave節(jié)點(diǎn)執(zhí)行讀請(qǐng)求的優(yōu)先級(jí)，所謂靜態(tài)節(jié)點(diǎn)，是指在本配置文件中顯示列出的redis節(jié)點(diǎn)，不指定的話為0


MasterReadPriority，StaticSlaveReadPriority，DynamicSlaveReadPriority這三個(gè)參數(shù)都配成一樣，就相當(dāng)于負(fù)載均衡

ServerFailureLimit: 一個(gè)redis實(shí)例出現(xiàn)多少次才錯(cuò)誤以后將其標(biāo)記為失效，不指定的話為10ServerRetryTimeout: 一個(gè)redis實(shí)例失效后多久后去檢查其是否恢復(fù)正常，不指定的話為1秒

6.keepalived 安裝

可以直接下載rpm,并進(jìn)行安裝；
yum  -y install keepalived

7.配置Keepalived

vim /etc/keepalived/keepalived.conf #主上配置
global_defs {
       notification_email {
              root@localhost
        }
        notification_email_from keepalived@localhost
        smtp_server 127.0.0.1
        smtp_connect_timeout 30 
        router_id redis-zhu
        vrrp_mcast_group4 224.0.100.100
      }       
vrrp_script check_redis_proxy {
      script "/usr/bin/check_redis_proxy.sh"
       interval 3
       weight 2
  }
  
  vrrp_instance VI_1 {
      state MASTER 
      interface eno16777736 
      virtual_router_id 6
      priority 100 
      advert_int 1 
      authentication {
          auth_type PASS 
          auth_pass 571f97b2
      }
     track_script {
         check_redis_proxy
     }
      virtual_ipaddress {
          192.168.244.144/24
      }
  }

vim /etc/keepalived/keepalived.conf #從上配置
global_defs {
       notification_email {
              root@localhost
        }
        notification_email_from keepalived@localhost
        smtp_server 127.0.0.1
        smtp_connect_timeout 30 
        router_id redis-zhu
        vrrp_mcast_group4 224.0.100.100
      }       
vrrp_script check_redis_proxy {
      script "/usr/bin/check_redis_proxy.sh"
       interval 3
       weight 2
  }
  
  vrrp_instance VI_1 {
      state BADKUP 
      interface ens33 
      virtual_router_id 6
      priority 80 
      advert_int 1 
      authentication {
          auth_type PASS 
          auth_pass 571f97b2
      }
     track_script {
         check_redis_proxy
     }
      virtual_ipaddress {
          192.168.244.144/24
      }
  }

8. Keepalived 腳本

vim /usr/bin/check_redis_proxy.sh
#!/bin/bash

PREDIXY_PID=`ps -ef |grep predixy|grep -v 'grep'|wc -l`
ps -ef |grep predixy|grep -v 'grep'|wc -l
if [ "${PREDIXY_PID}" -ge 1 ];then
	echo "predixy is Ok"
else
	systemctl start predixy
	sleep 3;
	PREDIXY_PID2=`ps -ef |grep predixy|grep -v 'grep'|wc -l`
         if  [ "${PREDIXY_PID2}" -eq 0 ];then
		systemctl stop keepalived
         fi
		
fi

9. Service 文件供參考

cat /usr/lib/systemd/system/redis.service
[Unit] 
Description=Redis
After=syslog.target nework.target

[Service]
ExecStart=/usr/bin/redis-server /etc/redis.conf  
ExecStop=/usr/bin/pkill redis-server
TimeoutStopSec=0
Restart=on-failure
User=redis
Group=redis
RuntimeDirectory=redis
RuntimeDirectoryMode=0755

# file size
LimitFSIZE=infinity
# cpu time
LimitCPU=infinity
# Virtual memory size
LimitAS=infinity
# open files
LimitNOFILE=64000
# processes/threads
LimitNPROC=64000
# stack size
LimitSTACK=1048576
# locked memory
LimitMEMLOCK=infinity
# total threads(user+kernel)
TasksMax=infinity
TasksAccounting=false
[Install]
WantedBy=multi-user.target

cat /usr/lib/systemd/system/redis-sentinel.service
[Unit]
Description=Redis-sentinel
After=syslog.target nework.target

[Service]
Type=forking
ExecStart=/usr/bin/redis-sentinel /etc/sentinel.conf  
ExecStop=/usr/bin/pkill redis-sentinel
TimeoutStopSec=0
Restart=on-failure
User=redis
Group=redis
RuntimeDirectory=redis
RuntimeDirectoryMode=0755

# file sizes
LimitFSIZE=infinity
# cpu time
LimitCPU=infinity
# virtual memory size
LimitAS=infinity
# open files
LimitNOFILE=64000
# processes/threads
LimitNPROC=64000
# stack size
LimitSTACK=1048576
# lcoked memory
LimitMEMLOCK=infinity
# total threads
TasksMax=infinity
TasksAccounting=false
[Install]
WantedBy=multi-user.target

cat  /usr/lib/systemd/system/predixy.service
[Unit]
Description=Predixy
After=syslog.target nework.target

[Service]
Type=simple
ExecStart=/usr/local/bin/predixy /etc/predixy/predixy.conf
ExecReload=/bin/kill -USR2 $MAINPID
ExecStop=/bin/kill -SIGINT $MAINPID
PrivateTmp=true

TimeoutStopSec=0
Restart=on-failure
User=redis
Group=redis
RuntimeDirectory=redis
RuntimeDirectory=0755

# file size
LimitFSIZE=infinity
# cpu time
LimitCPU=infinity
# virtual memory size
LimitAS=infinity
# open files
LimitNOFILE=64000
# processes/threads
LimitNPROC=64000
# stack size
LimitSTACK=1048576
# locked memory
LimitMEMLOCK=infinity
# total threads
TasksMax=infinity
TasksAccounting=false
[Install]
WantedBy=multi-user.target

10. 啟動(dòng)服務(wù)

依次啟動(dòng)并確認(rèn)正常后，啟動(dòng)下一個(gè)Redis, Redis-Sentinel, Predixy, Keepalived; 
最后確認(rèn)主從狀態(tài)，代理狀態(tài)，vip;

systemctl start keepalived
systemctl daemon-reload
systemctl enable redis.service predixy.service  sentinel.service keepalived.service
systemctl start  redis.service predixy.service  sentinel.service

注意以上兩臺(tái)主機(jī)都安裝

Predixy 參考文檔：https://github.com/joyieldInc/predixy/blob/master/doc/config_CN.md

posted @ 2021-02-03 11:19 春天的風(fēng)情閱讀(463) 評(píng)論(0) 收藏舉報(bào)

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Redis 主從切換+Predixy

1.配置互信

2.Redis 包安裝及賬號(hào)設(shè)置

系統(tǒng) 及 Redis參數(shù)配置

4.predixy 安裝

5. 配置Predixy

6.keepalived 安裝

7.配置Keepalived

8. Keepalived 腳本

9. Service 文件供參考

10. 啟動(dòng)服務(wù)

注意以上兩臺(tái)主機(jī)都安裝

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