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                # haproxy和keepalived部署 ``` apt-get install haproxy #配置文件 global log 127.0.0.1 local0 info maxconn 4096 chroot /var/lib/haproxy user haproxy group haproxy daemon defaults log global mode tcp timeout connect 5000ms timeout client 50000ms timeout server 50000ms listen stats bind *:9000 mode http stats enable stats hide-version stats uri /stats stats refresh 30s stats realm Haproxy\ Statistics stats auth admin:P@ssw0rd frontend k8s-api bind *:6443 mode tcp option tcplog default_backend k8s-api backend k8s-api mode tcp option tcplog option tcp-check balance leastconn default-server inter 10s downinter 5s rise 2 fall 2 slowstart 60s maxconn 250 maxqueue 256 weight 100 server k8s-master1 192.168.11.212:6443 check server k8s-master2 192.168.11.213:6443 check server k8s-master3 192.168.11.214:6443 check ``` # keepalived部署 ``` apt-get install keepalived 配置文件: root@ubuntu:/etc/keepalived# ls check_haproxy.sh keepalived.conf #vim check_haproxy.sh #!/bin/sh if [ $(ps -C haproxy --no-header | wc -l) -eq 0 ]; then systemctl restart haproxy fi sleep 2 if [ $(ps -C haproxy --no-header | wc -l) -eq 0 ]; then killall keepalived fi #chmod +x check_haproxy.sh # vim keepalived.conf ! Configuration File for keepalived # global setting , notify email setting global_defs { #存在于同一個網段中,一組keepalived的各個節點都有不同的名字 #在全局設置中,我們還可以設置管理員的email信息等。 router_id LVS_V1 } #這個是我們在上一小結講到的haproxy檢查腳本,我們保存在這個文件中(注意文件權限) vrrp_script chkhaproxy { script "/etc/keepalived/check_haproxy.sh" #每10秒鐘,檢查一次 interval 10 } #keepalived實例設置,是最重要的設置信息 vrrp_instance VI_1 { #state狀態MASTER表示是主要工作節點。 #一個keepalived組中,最多只有一個MASTER節點,當然也可以沒有 state MASTER #實例所綁定的網卡設備,我的網卡設備是ens33。您按照您自己的來 interface ens160 #同一個keepalived組,節點的設置必須一樣,這樣才會被識別 virtual_router_id 52 #節點優先級,BACKUP的優先級一定要比MASTER的優先級低 priority 100 #組播信息發送間隔,兩個節點設置必須一樣 advert_int 1 #實際的ens33上的固定ip地址 mcast_src_ip 192.168.11.215 #驗證信息,只有驗證信息相同,才能被加入到一個組中。 authentication { auth_type PASS auth_pass 1111 } #虛擬地址和綁定的端口,如果有多個,就綁定多個 #dev 是指定浮動IP要綁定的網卡設備號 virtual_ipaddress { 192.168.11.230/24 dev ens160 } #設置的檢查腳本 #關聯上方的“vrrp_script chkhaproxy” track_script { chkhaproxy } } !注意 #節點優先級,BACKUP的優先級一定要比MASTER的優先級低 priority 100 這里就是來區分haproxy主從的關鍵點一定要寫好 啟動服務: systemctl start keepalived ps -ef | grep keepalived netstat -anptu | grep :6443 注意:如果該虛擬ip的端口沒有起來,node節點的kubelet組件無法連接到master的kube-apiserver組件,無法啟動kubelet服務。 啟動服務后,嘗試用master節點和node節點去Ping一下該虛擬ip,看是否可以互相通信。否則,檢查keepalived的端口。 root@a4:/etc/keepalived# netstat -ntpul | grep :6443 tcp 0 0 0.0.0.0:6443 0.0.0.0:* LISTEN 3428/haproxy ```
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