#!/usr/bin/env bash
set -euo pipefail
advertised_host=${KAFKA_ADVERTISED_HOST:?Set the VM LAN IP or DNS name}
[[ $advertised_host =~ ^[a-zA-Z0-9][a-zA-Z0-9.-]*$ ]] || {
  echo 'KAFKA_ADVERTISED_HOST must be an IPv4 address or DNS name, without protocol/port.' >&2
  exit 1
}
sed "s/__KAFKA_ADVERTISED_HOST__/$advertised_host/g" \
  /etc/kafka/server.properties > /tmp/host-metrics-server.properties
/opt/kafka/bin/kafka-storage.sh format --ignore-formatted \
  --cluster-id 'MkU3OEVBNTcwNTJENDM2Qk' --config /tmp/host-metrics-server.properties
exec /opt/kafka/bin/kafka-server-start.sh /tmp/host-metrics-server.properties