一、下載

https://www.keepalived.org/download.html

keepalived-1.4.5.tar.gz

二、編譯安裝

yum install -y gcc openssl-devel libnl libnl3-devel libnfnetlink-devel
tar -zxvf keepalived-1.4.5.tar.gz
cd keepalived-1.4.5
./configure prefix=/usr/local/keepalived
make && make install

三、修改配置檔案

cd /usr/local/keepalived/
mkdir
 
 conf
cp etc/keepalived/keepalived.conf conf/
vi conf/keepalived.conf

! Configuration File for keepalived

# 定義用於例項執行的指令碼內容
vrrp_script chk_http_nginx {
        script "/opt/nginx/check_nginx.sh"
        interval 10
        weight 2
}

# 全域性配置
global_defs {
    router_id LVS_DEVEL
}

# 定義一個虛擬路由器的例項名稱
vrrp_instance VI_1 {
    # 定義初始狀態，可以是MASTER或者BACKUP
 

    state MASTER
    # 工作介面，通告選舉使用哪個介面進行
    interface eth0
    # 優先順序
    priority 100
    # 本地IP地址
    unicast_src_ip 192.168.100.11
    # 配置從節點的目標IP地址
    unicast_peer {
        192.168.100.12
    }
    # ID還是虛擬MAC最後一段地址的資訊，取值範圍0-255
    virtual_router_id 6
    # 工作模式，nopreempt表示工作在非搶佔模式，預設是搶佔模式 preempt
 

    nopreempt
    # 通告頻率，單位為秒
    advert_int 1
    # 通訊認證機制，這裡是明文認證還有一種是加密認證
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    # 追蹤指令碼，通常用於去執行上面的vrrp_script定義的指令碼內容
    track_script {
        chk_http_nginx
    }
    # 設定虛擬VIP地址
    virtual_ipaddress {
        192.168.100.10
    }
}

四、啟動

/usr/local/keepalived/sbin/keepalived -f /usr/local/keepalived/conf/keepalived.conf