ProxyPass / balancer://hotcluster/
<Proxy balancer://hotcluster>
  BalancerMember loadfactor=1
  BalancerMember loadfactor=2
  # The below is the hot standby
  BalancerMember status=+H
  ProxySet lbmethod=bytraffic
  • statusパラメータの説明

Single letter value defining the initial status of this worker: 'D' is disabled, 'S' is stopped, 'I' is ignore-errors, 'H' is hot-standby and 'E' is in an error state. Status can be set (which is the default) by prepending with '+' or cleared by prepending with '-'. Thus, a setting of 'S-E' sets this worker to Stopped and clears the in-error flag.