post_install() {
  groupadd -r clickhouse &>/dev/null
  useradd -r -g clickhouse -d /var/lib/clickhouse -s /bin/false clickhouse &>/dev/null
  mkdir -p /var/lib/clickhouse/
  chmod 0750 /var/lib/clickhouse
  mkdir -p /var/log/clickhouse-server
  chown clickhouse:clickhouse -R /var/lib/clickhouse /var/log/clickhouse-server
  ldconfig
}

post_remove() {
  if getent passwd clickhouse &>/dev/null; then
    userdel clickhouse
  fi
  if getent group clickhouse &>/dev/null; then
    groupdel clickhouse
  fi
}