keepalived example

keepalived.conf

global_defs {
  enable_script_security
}

vrrp_script check_script {
  script "/usr/bin/systemctl is-active {{ .ServiceName }}.service"
  weight 10
  interval 3
  fall 1
  rise 3
  user root root
}

vrrp_instance {{ .VirtualRouterInstanceName }} {
  state BACKUP
  preempt
  interface {{ .InterfaceName }}
  virtual_router_id {{ .VirtualRouterID }}
  priority 100
  advert_int 1
  virtual_ipaddress {
    {{ .SharedIP }}
  }
  authentication {
    auth_type PASS
    auth_pass {{ .SharedPassword }}
  }
  track_script {
    check_script
  }
}