tencent cloud

garp_master_delay 1
garp_master_refresh 5

yum list keepalived

yum install -y keepalived

tar zxvf keepalived-1.2.24.tar.gz
cd keepalived-1.2.24
./configure --prefix=/
make; make install
chmod +x /etc/init.d/keepalived   // Prevent occurrence of env: /etc/init.d/keepalived: Permission denied

   ! Configuration File for keepalived
   global_defs {
      notification_email {
        acassen@firewall.loc
        failover@firewall.loc
        sysadmin@firewall.loc
      }
      notification_email_from Alexandre.Cassen@firewall.loc
      smtp_server 192.168.200.1   
      smtp_connect_timeout 30
      router_id LVS_DEVEL
      vrrp_skip_check_adv_addr
      vrrp_garp_interval 0
      vrrp_gna_interval 0
   }
   vrrp_script checkhaproxy
   {
        script "/etc/keepalived/do_sth.sh"   # Check whether the service process runs normally. Replace “do_sth.sh” with your actual script name. Run it as needed.
        interval 5
   }
   vrrp_instance VI_1 {
   # Select proper parameters for the primary and secondary CVMs.
   state BACKUP              # Set the initial status to `Backup`
       interface eth0          # The ENI such as `eth0` used to bind a VIP  
       virtual_router_id 51        # The`virtual_router_id` value for the cluster
       nopreempt                   # Non-preempt mode
       # preempt_delay 10      # Effective only when `state` is `MASTER`    
       priority 100            # Configure the same weight for the two devices
       advert_int 5        
       authentication {
           auth_type PASS
           auth_pass 1111
       }
       unicast_src_ip 172.16.16.5 # Private IP address of the local device
       unicast_peer {
           172.16.16.6                # IP address of the peer device
       }
       virtual_ipaddress {
           172.16.16.12              # HAVIP 
       }
       notify_master "/etc/keepalived/notify_action.sh MASTER"
       notify_backup "/etc/keepalived/notify_action.sh BACKUP"
       notify_fault "/etc/keepalived/notify_action.sh FAULT"
       notify_stop "/etc/keepalived/notify_action.sh STOP"
       garp_master_delay 1    # How long it will take before the ARP cache can be updated after the CVM switches to the primary status
       garp_master_refresh 5   # Time interval between which the primary node sends ARP messages

       track_interface {
                   eth0               # ENI that bound with VIP, such as `eth0`
           }
       track_script {
          checkhaproxy 
       }
   }

! Configuration File for keepalived
global_defs {
   notification_email {
     acassen@firewall.loc
     failover@firewall.loc
     sysadmin@firewall.loc
   }
   notification_email_from Alexandre.Cassen@firewall.loc
   smtp_server 192.168.200.1
   smtp_connect_timeout 30
   router_id LVS_DEVEL
   vrrp_skip_check_adv_addr
   vrrp_garp_interval 0
   vrrp_gna_interval 0
}
vrrp_script checkhaproxy
{
    script "/etc/keepalived/do_sth.sh"
     interval 5
}
vrrp_instance VI_1 {
# Select proper parameters for the primary and secondary CVMs.
state BACKUP            #Set the initial status to `Backup`
    interface eth0          # The ENI such as `eth0` used to bind a VIP  
    virtual_router_id 51        # The`virtual_router_id` value for the cluster
    nopreempt                   #Non-preempt mode
    # preempt_delay 10      # Effective only when `state` is `MASTER`   
    priority 100            # Configure the same weight for the two devices
    advert_int 5       
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    unicast_src_ip 172.16.16.6   #Private IP of the local device
    unicast_peer {
        172.16.16.5                #IP address of the peer device
    }
    virtual_ipaddress {
        172.16.16.12              # HAVIP 
    }
    notify_master "/etc/keepalived/notify_action.sh MASTER"
    notify_backup "/etc/keepalived/notify_action.sh BACKUP"
    notify_fault "/etc/keepalived/notify_action.sh FAULT"
    notify_stop "/etc/keepalived/notify_action.sh STOP"
    garp_master_delay 1    # How long it will take before the ARP cache can be updated after the CVM switches to the primary status
    garp_master_refresh 5   #Time interval between which the primary node sends ARP messages
    track_interface {
                eth0               # ENI that bound with VIP, such as `eth0`
        }
    track_script {
       checkhaproxy 
    }
}

systemctl start keepalived

#!/bin/bash
#/etc/keepalived/notify_action.sh
log_file=/var/log/keepalived.log
log_write()
{
    echo "[`date '+%Y-%m-%d %T'`] $1" >> $log_file
}
[ ! -d /var/keepalived/ ] && mkdir -p /var/keepalived/

case "$1" in
    "MASTER" )
        echo -n "$1" > /var/keepalived/state
        log_write " notify_master"
        echo -n "0" /var/keepalived/vip_check_failed_count
        ;;
    "BACKUP" )
        echo -n "$1" > /var/keepalived/state
        log_write " notify_backup"
        ;;
    "FAULT" )
        echo -n "$1" > /var/keepalived/state
        log_write " notify_fault"
        ;;
    "STOP" )
        echo -n "$1" > /var/keepalived/state
        log_write " notify_stop"
        ;;
    *)
        log_write "notify_action.sh: STATE ERROR!!!"
        ;;
esac