keepalived - Como você define as instâncias de VRRP de vários tipos na mesma interface?

Question

Estou em uma situação em que preciso definir duas instâncias de VRRP na mesma interface. Eu preciso conseguir isso porque rsyslogd e elasticsearch precisam usar a interface eth0 para comunicação de rede.

Este post parecia ser um similar não mencionou a configuração, então decidi fazer uma pergunta.

Eu criei uma configuração abaixo, mas dois mestres são criados em hosts diferentes.

Configuração do lado mestre

vrrp_script chk_rsyslog {
  script "netstat -atunp | grep rsyslogd | grep '0.0.0.0:514' &>/dev/null"
  interval 2 # every 2 seconds
  weight 2 # add 2 points if OK
}

vrrp_script chk_es {
  script "netstat -atunp | grep java | grep '192.168.21.14:9300' &>/dev/null"
  interval 2 # every 2 seconds
  weight 2 # add 2 points if OK

vrrp_instance RH_1 {
    state MASTER
    interface eth0
    virtual_router_id 50
    priority 10
    advert_int 1
    virtual_ipaddress {
        192.168.11.250/24
    }

    track_script {
      chk_rsyslog
    }
}

vrrp_instance ES_1 {
    state MASTER
    interface eth0
    virtual_router_id 51
    priority 10
    advert_int 1
    virtual_ipaddress {
        192.168.11.251/24
    }

    track_script {
      chk_es
    }
}

Configuração do lado do backup

vrrp_script chk_rsyslog {
  script "netstat -atunp | grep rsyslogd | grep '0.0.0.0:514' &>/dev/null"
  interval 2 # every 2 seconds
  weight 2 # add 2 points if OK
}

vrrp_script chk_es {
  script "netstat -atunp | grep java | grep '192.168.21.15:9300' &>/dev/null"
  interval 2 # every 2 seconds
  weight 2 # add 2 points if OK
}

vrrp_instance RH_1 {
    state BACKUP
    interface eth0
    virtual_router_id 50
    priority 9
    advert_int 1
    virtual_ipaddress {
        192.168.11.250/24
    }

    track_script {
      chk_rsyslog
    }
}

vrrp_instance ES_1 {
    state BACKUP
    interface eth0
    virtual_router_id 51
    priority 9
    advert_int 1
    virtual_ipaddress {
        192.168.11.251/24
    }

    track_script {
      chk_es
    }
}

Efetuar logon no lado do backup mostra que ambas as instâncias são iniciadas, mas ES_1 não é refletido na configuração de ip para os.

Apr 19 08:49:54 rhel2 Keepalived_vrrp[23321]: Netlink reflector reports IP 192.168.11.15 added
Apr 19 08:49:54 rhel2 Keepalived_vrrp[23321]: Netlink reflector reports IP 192.168.21.15 added
Apr 19 08:49:54 rhel2 Keepalived_vrrp[23321]: Netlink reflector reports IP fe80::ab04:d4e4:841e:e3e1 added
Apr 19 08:49:54 rhel2 Keepalived_vrrp[23321]: Netlink reflector reports IP fe80::812:1dd8:9ed1:a6af added
Apr 19 08:49:54 rhel2 Keepalived_vrrp[23321]: Registering Kernel netlink reflector
Apr 19 08:49:54 rhel2 Keepalived_vrrp[23321]: Registering Kernel netlink command channel
Apr 19 08:49:54 rhel2 Keepalived_vrrp[23321]: Registering gratuitous ARP shared channel
Apr 19 08:49:54 rhel2 Keepalived_vrrp[23321]: Opening file '/etc/keepalived/keepalived.conf'.
Apr 19 08:49:54 rhel2 Keepalived_vrrp[23321]: Configuration is using : 69267 Bytes
Apr 19 08:49:54 rhel2 Keepalived_vrrp[23321]: Using LinkWatch kernel netlink reflector...
Apr 19 08:49:54 rhel2 Keepalived_vrrp[23321]: VRRP_Instance(RH_1) Entering BACKUP STATE
Apr 19 08:49:54 rhel2 Keepalived_vrrp[23321]: VRRP_Instance(ES_1) Entering BACKUP STATE
Apr 19 08:49:54 rhel2 Keepalived_vrrp[23321]: VRRP sockpool: [ifindex(2), proto(112), unicast(0), fd(10,11)]
Apr 19 08:49:54 rhel2 Keepalived_healthcheckers[23320]: Configuration is using : 7722 Bytes
Apr 19 08:49:54 rhel2 Keepalived_healthcheckers[23320]: Using LinkWatch kernel netlink reflector...
Apr 19 08:49:54 rhel2 Keepalived_vrrp[23321]: VRRP_Script(chk_rsyslog) succeeded
Apr 19 08:49:58 rhel2 Keepalived_vrrp[23321]: VRRP_Instance(RH_1) Transition to MASTER STATE

Meu resultado do comando ip addr.

2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 52:54:00:12:0e:da brd ff:ff:ff:ff:ff:ff
    inet 192.168.11.15/24 brd 192.168.11.255 scope global eth0
       valid_lft forever preferred_lft forever
    inet 192.168.11.250/24 scope global secondary eth0
       valid_lft forever preferred_lft forever
    inet6 fe80::ab04:d4e4:841e:e3e1/64 scope link
       valid_lft forever preferred_lft forever

É possível definir várias instâncias de VRRP na mesma interface?

As informações da minha plataforma estão abaixo.

[root@rhel2 keepalived]# cat /etc/redhat-release
Red Hat Enterprise Linux Server release 7.3 (Maipo)
[root@rhel2 keepalived]# rpm -qa | grep keepalived
keepalived-1.2.13-8.el7.x86_64

    

Answer 1

Eu não tinha colchete de fechamento '}' para chk_es