High Availability with Keepalived

Wed, 04 Sep 2024 09:00:00 +0700

Installing Packages Dependencies

dnf install -y keepalived

Keepalived Configuration

Keepalived state reference

MASTER-MASTER (if down, back to top priority)
MASTER-BACKUP (if down, back to MASTER)
BACKUP-BACKUP (if down, respect to node with MASTER state)
Routers with priority 101 will become MASTER and Routers with priority 100 will become BACKUP.

Configure First Node

cat <<EOF | tee /etc/keepalived/keepalived.conf
global_defs {
    router_id JumpServer
    enable_script_security
    vrrp_check_unicast_src
}

vrrp_track_process track_openvpn {
    process openvpn
    weight 2
}

vrrp_instance VIP {
    state MASTER
    interface eth1
    virtual_router_id 69
    priority 101
    advert_int 1
    nopreempt

    authentication {
        auth_type PASS
        auth_pass Pa\$\$w0rd
    }

    unicast_src_ip 10.79.80.1
    unicast_peer {
        10.79.80.2
    }

    virtual_ipaddress {
        103.150.80.130/28 dev eth0
        10.79.80.254/24 dev eth1
    }

    virtual_routes {
        0.0.0.0/0 via 103.150.80.142 dev eth0 metric 100
    }

    static_routes {
        0.0.0.0/0 via 10.79.80.251 dev eth1 metric 101
    }

    track_process {
        track_openvpn
    }
}
EOF

Restart service and set to run while system boot

Keepalived on Viki Pranata

High Availability with Keepalived

Installing Packages Dependencies

Keepalived Configuration

Configure First Node