keepalived Redis-master判定 VIP 實現自動飄移
默認路徑 ：/usr/local/redis
keepalived 默認/etc/keepalived
檢測監控 redis_backup.sh,redis_check.sh,redis_fault.sh redis_master.sh,redis_stop.sh腳本默認 /etc/keepalived/script
iptables 設置添加 需要開放的端口和地址
224.0.0.18 是vrrp組播地址 ；
iptables -A INPUT -d 224.0.0.18 -j ACCEPT
Master 配置
global_defs {
router_id redis1
}
vrrp_script chk_redis
{
script "/etc/keepalived/scripts/redis_check.sh 127.0.0.1 6379"
interval 2
timeout 2
fall 3
}
vrrp_instance redis {
state MASTER
interface bond0
virtual_router_id 100
priority 100
nopreempt # no seize,must add
advert_int 1
authentication { #all node must same
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
1.2.3.4/24
}
track_script {
chk_redis
}
notify_master "/etc/keepalived/scripts/redis_master.sh 127.0.0.1 1.2.3.1 6379"
notify_backup "/etc/keepalived/scripts/redis_backup.sh 127.0.0.1 1.2.3.1 6379"
notify_fault /etc/keepalived/scripts/redis_fault.sh
notify_stop /etc/keepalived/scripts/redis_stop.sh
}
Salve 配置
global_defs {
router_id redis101
}
vrrp_script chk_redis
{
script "/etc/keepalived/scripts/redis_check.sh 127.0.0.1 6379"
interval 2
timeout 2
fall 3
}
vrrp_instance redis {
state BACKUP
interface bond0
virtual_router_id 90
priority 100
advert_int 1
authentication { #all node must same
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
1.2.3.4/24
}
track_script {
chk_redis
}
notify_master "/etc/keepalived/scripts/redis_master.sh 127.0.0.1 1.2.3.2 6379"
notify_backup "/etc/keepalived/scripts/redis_backup.sh 127.0.0.1 1.2.3.2 6379"
notify_fault /etc/keepalived/scripts/redis_fault.sh
notify_stop /etc/keepalived/scripts/redis_stop.sh
}
VIP 檢測 漂移
# redis_backup.sh
#!/bin/bash
REDISCLI="/usr/local/redis/src/redis-cli -h $1 -p $3"
LOGFILE="/etc/keepalived/log/keepalived-redis-state.log"
echo "[backup]" >> $LOGFILE
date >> $LOGFILE
echo "Run SLAVEOF cmd ..." >> $LOGFILE
$REDISCLI SLAVEOF $2 $3 >> $LOGFILE 2>&1
# echo "Being slave...." >> $LOGFILE 2>&1
sleep 15 #delay 15 s wait data sync exchange role
-----
# redis_check.sh
#!/bin/bash
ALIVE=`/usr/local/redis/src/redis-cli -h $1 -p $2 PING`
LOGFILE="/etc/keepalived/log/keepalived-redis-check.log"
echo "[CHECK]" >> $LOGFILE
date >> $LOGFILE
if [ $ALIVE == "PONG" ]; then :
echo "Success: redis-cli -h $1 -p $2 PING $ALIVE" >> $LOGFILE 2>&1
exit 0
else
echo "Failed:redis-cli -h $1 -p $2 PING $ALIVE " >> $LOGFILE 2>&1
exit 1
fi
-----
# redis_fault.sh
#!/bin/bash
LOGFILE=/etc/keepalived/log/keepalived-redis-state.log
echo "[fault]" >> $LOGFILE
date >> $LOGFILE
-----
# redis_master.sh
#!/bin/bash
REDISCLI="/usr/local/redis/src/redis-cli -h $1 -p $3"
LOGFILE="/etc/keepalived/log/keepalived-redis-state.log"
echo "[master]" >> $LOGFILE
date >> $LOGFILE
echo "Being master...." >> $LOGFILE 2>&1
echo "Run MASTER cmd ..." >> $LOGFILE 2>&1
$REDISCLI SLAVEOF $2 $3 >> $LOGFILE
sleep 10 #delay 10 s wait data async cancel sync
echo "Run SLAVEOF NO ONE cmd ..." >> $LOGFILE
$REDISCLI SLAVEOF NO ONE >> $LOGFILE 2>&1
-----
# redis_stop.sh
#!/bin/bash
LOGFILE=/etc/keepalived/log/keepalived-redis-state.log
echo "[stop]" >> $LOGFILE
date >> $LOGFILE
keepalived Redis-master判定 VIP 實現自動飄移