4.7.3. keepalived 설치 및 구성

절차

1. keepalived 설치 :

   [root@haproxy]# yum install -y keepalived

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2. 두 HAProxy 노드 모두에서 keepalived 를 구성합니다.

   [root@haproxy]# vim /etc/keepalived/keepalived.conf

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   구성 파일에는 haproxy 프로세스를 확인하는 스크립트가 있습니다.

   vrrp_script chk_haproxy {
     script "killall -0 haproxy" # check the haproxy process
     interval 2 # every 2 seconds
     weight 2 # add 2 points if OK
   }

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   다음으로 기본 및 백업 로드 밸런서의 인스턴스에서 eno1 을 네트워크 인터페이스로 사용합니다. 또한 가상 IP 주소 즉, 192.168.1.20 을 할당합니다.

   기본 로드 밸런서 노드

   vrrp_instance RGW {
       state MASTER # might not be necessary. This is on the primary LB node.
       @main interface eno1
       priority 100
       advert_int 1
       interface eno1
       virtual_router_id 50
       @main unicast_src_ip 10.8.128.43 80
       unicast_peer {
              10.8.128.53
              }
       authentication {
           auth_type PASS
           auth_pass 1111
       }
       virtual_ipaddress {
           192.168.1.20
       }
       track_script {
         chk_haproxy
       }
   }
   virtual_server 192.168.1.20 80 eno1 { #populate correct interface
       delay_loop 6
       lb_algo wlc
       lb_kind dr
       persistence_timeout 600
       protocol TCP
       real_server 10.8.128.43 80 { # ip address of rgw2 on physical interface, haproxy listens here, rgw listens to localhost:8080 or similar
           weight 100
           TCP_CHECK { # perhaps change these to a HTTP/SSL GET?
               connect_timeout 3
           }
       }
       real_server 10.8.128.53 80 { # ip address of rgw3 on physical interface, haproxy listens here, rgw listens to localhost:8080 or similar
           weight 100
           TCP_CHECK { # perhaps change these to a HTTP/SSL GET?
               connect_timeout 3
           }
       }
   }

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   백업 로드 밸런서 노드

   vrrp_instance RGW {
       state BACKUP # might not be necessary?
       priority 99
       advert_int 1
       interface eno1
       virtual_router_id 50
       unicast_src_ip 10.8.128.53 80
       unicast_peer {
              10.8.128.43
              }
       authentication {
           auth_type PASS
           auth_pass 1111
       }
       virtual_ipaddress {
           192.168.1.20
       }
       track_script {
         chk_haproxy
       }
   }
   virtual_server 192.168.1.20 80 eno1 { #populate correct interface
       delay_loop 6
       lb_algo wlc
       lb_kind dr
       persistence_timeout 600
       protocol TCP
       real_server 10.8.128.43 80 { # ip address of rgw2 on physical interface, haproxy listens here, rgw listens to localhost:8080 or similar
           weight 100
           TCP_CHECK { # perhaps change these to a HTTP/SSL GET?
               connect_timeout 3
           }
       }
       real_server 10.8.128.53 80 { # ip address of rgw3 on physical interface, haproxy listens here, rgw listens to localhost:8080 or similar
           weight 100
           TCP_CHECK { # perhaps change these to a HTTP/SSL GET?
               connect_timeout 3
           }
       }
   }

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3. keepalived 서비스를 활성화하고 시작합니다.

   [root@haproxy]# systemctl enable keepalived
   [root@haproxy]# systemctl start keepalived

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