redis+Keepalived主從熱備切換實例

時間 2019-11-20

標籤 redis+keepalived redis keepalived 主從切換實例欄目 Redis 简体版

原文原文鏈接

[root@cache-redis-01~/]# cat  /etc/keepalived/keepalived.conf

! Configuration File for keepalived
global_defs {
   notification_email {
      11270963592@qq.com
   }
   notification_email_from 18978038798@189.cn
   smtp_server smtp.189.cn
   smtp_connect_timeout 30 router_id redis_service01
   vrrp_skip_check_adv_addr
   # vrrp_strict  # can not use ping 
   vrrp_garp_interval 0
   vrrp_gna_interval 0
}
vrrp_script chk_redis { script /etc/keepalived/scripts/redis_check.sh ###監控本地redis alive interval 2 ###監控時間間隔（秒） } 
vrrp_instance redis {
    state BACKUP
    interface eth0
    virtual_router_id 55 priority 100 nopreempt ###不搶佔MASTER
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
 track_script { chk_redis ###執行上面定義的chk_redis }
    virtual_ipaddress {
        172.16.1.63/24 dev eth0 label eth0:63
    }
 notify_master /etc/keepalived/scripts/redis_master.sh # 當此節點切換爲master時執行的腳本 notify_backup "/etc/keepalived/scripts/redis_backup.sh cache-redis-02" # 當此節點切換爲
 # backup時執行的腳本 notify_fault /etc/keepalived/scripts/redis_fault.sh # 當此節點故障時（chk_keepalive中 # 腳本返回非0）執行的腳本 notify_stop /etc/keepalived/scripts/redis_stop.sh # 當此節點keepalived服務stop時執行的腳本
}

[root@cache-redis-02~/]# cat /etc/keepalived/keepalived.conf    

! Configuration File for keepalived
global_defs {
   notification_email {
      11270963592@qq.com
   }
   notification_email_from 18978038798@189.cn
   smtp_server smtp.189.cn
   smtp_connect_timeout 30 router_id redis_service02
   vrrp_skip_check_adv_addr
   # vrrp_strict  # can not use ping 
   vrrp_garp_interval 0
   vrrp_gna_interval 0
}
vrrp_script chk_redis { script /etc/keepalived/scripts/redis_check.sh ###監控本地redis alive  interval 2 ###監控時間間隔（秒） }
vrrp_instance redis {
    state BACKUP
    interface eth0
    virtual_router_id 55
    priority 50
    
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
 track_script { chk_redis ###執行上面定義的chk_redis } 
    virtual_ipaddress {
        172.16.1.63/24 dev eth0 label eth0:63
    }
 notify_master /etc/keepalived/scripts/redis_master.sh # 當此節點切換爲master時執行的腳本 notify_backup "/etc/keepalived/scripts/redis_backup.sh cache-redis-01" # 當此節點切換爲
 # backup時執行的腳本 notify_fault /etc/keepalived/scripts/redis_fault.sh # 當此節點故障時（chk_keepalive中
 # 腳本返回非0）執行的腳本 notify_stop /etc/keepalived/scripts/redis_stop.sh # 當此節點keepalived服務stop時執行的腳本
}

跟從的腳本徹底同樣！！！

mkdir -p /etc/keepalived/scripts

cat >/etc/keepalived/scripts/redis_master.sh<<-EOF #!/bin/bash PORT="\${1:-6380}" REDISCLI="/bin/redis-cli" LOGFILE="/var/log/keepalived-redis-state.log" sleep 10 #延遲10秒待數據被對方同步完成以後再切換主從角色 echo -e "[keepalived master]\t\$(date +%F_%T)\nRun SLAVEOF NO ONE cmd ..." >>\${LOGFILE} \$REDISCLI -h \$(hostname) -p \${PORT} SLAVEOF NO ONE &>>\${LOGFILE} EOF cat >/etc/keepalived/scripts/redis_backup.sh<<-EOF #!/bin/bash REMOTE_HOSTNAME="\$1" PORT="\${2:-6380}" REDISCLI="/bin/redis-cli" LOGFILE="/var/log/keepalived-redis-state.log" sleep 15 #延遲15秒待數據被對方同步完成以後再切換主從角色 echo -e "[keepalived backup]\t\$(date +%F_%T)\nRun SLAVEOF \${REMOTE_HOSTNAME} \${PORT} ..." >>\${LOGFILE} \$REDISCLI -h \$(hostname) -p \${PORT} SLAVEOF \${REMOTE_HOSTNAME} \${PORT} &>>\${LOGFILE} EOF cat >/etc/keepalived/scripts/redis_check.sh<<-EOF #!/bin/bash PORT="\${1:-6380}" LOGFILE=/var/log/keepalived-redis-state.log ALIVE=\$(/bin/redis-cli -h \$(hostname) -p \${PORT} PING) if [ "\$ALIVE" == "PONG" ]; then exit 0 else echo -e "[redis_check fault]\t\$(date +%F_%T)" >> \$LOGFILE exit 1 fi EOF cat >/etc/keepalived/scripts/redis_fault.sh<<-EOF #!/bin/bash systemctl stop keepalived.service EOF cat >/etc/keepalived/scripts/redis_stop.sh<<-EOF #!/bin/bash LOGFILE=/var/log/keepalived-redis-state.log echo -e "[keepalived stop]\t\$(date +%F_%T)" >> \$LOGFILE EOF chmod +x /etc/keepalived/scripts/*.sh

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