NAME
vayne-ctrl - vayne control script to maintain region info.
SYNOPSIS
Switch host to region
  $0 --region foo --switch --host hostname
Delete region information
  $0 --delete  --region region
Set region redis server
  $0 --region foo --set --server redisserver:port --password redispasswd
Show region running information
  $0 --region foo
  $0 --region foo --host hostname
Show region information
  $0 --regions
Show worker information
  $0 --info
  $0 --info  --host hostname
Delete host region information
  $0 --delete
  $0 --delete  --host hostname