docker-kafka.zsh

function docker-port-mappings() {
  local x=""
  for x in $(docker ps -q); docker port $x
}

function docker-kafka-iptables() {
  local hp="host port"
  local gp="guest port"
  for hp in 2181 9092; do
    for gp in $(docker-port-mappings |grep $hp | head -1 | sed -r "s/.*:(.*)/\1/g"); do
      echo iptables -t nat -A OUTPUT -p tcp -d 127.0.0.1 --dport $hp -j REDIRECT --to-port $gp
    done
  done
}

kafka-docker

iptables -t nat -A OUTPUT -p tcp -d 127.0.0.1 --dport 2181 -j REDIRECT --to-port 32768
iptables -t nat -A OUTPUT -p tcp -d 127.0.0.1 --dport 9092 -j REDIRECT --to-port 32769
iptables -t nat -A OUTPUT -p tcp -d 127.0.0.1 --dport 9093 -j REDIRECT --to-port 32770
iptables -t nat -A OUTPUT -p tcp -d 127.0.0.1 --dport 9094 -j REDIRECT --to-port 32771