import_hostgroups.sh

#!/usr/bin/env bash

# 1. collect existing hostgroups with `ipa hostgroup-find > <file>
# 2. copy <file> to new IPA server (with new REALM)
# 3. run `import_hostgroups.sh <file>` on new IPA server after running
#    `ipa-client-install --uninstall` to remove the existing IPA
#    config, and then running `ipa-client-install <new IPA info>` to
#    enroll the client in the new IPA server.

progname=${0##*/}
file=$1

if ! [[ -f $file ]]; then
  echo "$progname: $file does not exist" >&2
  exit 1
fi

if [[ $2 == "-d" ]]; then
  debug="echo"
fi

RE_NAME="Host-group: (.*)"
RE_DESC="Description: (.*)"
RE_MEMBER_GROUPS="Member host-groups: (.*)"
RE_MEMBERS="Member hosts: (.*)"

# create groups if they don't exist
name=""
desc=""
while read line; do
  if [[ $line =~ $RE_NAME ]]; then
    if [[ -n $name ]]; then
      if ! ipa hostgroup-show $name >/dev/null 2>&1; then
        $debug ipa hostgroup-add $name --desc="$desc"
      fi
    fi
    name=${BASH_REMATCH[1]}
  fi

  if [[ $line =~ $RE_DESC ]]; then
    desc=${BASH_REMATCH[1]}
  fi
done < $file
if ! ipa hostgroup-show $name >/dev/null 2>&1; then
  $debug ipa hostgroup-add $name --desc="$desc"
fi

name=""
# add hosts to groups
while read line; do
  if [[ $line =~ $RE_NAME ]]; then
    if [[ -n $name ]]; then
      $debug ipa hostgroup-add-member $name --hosts="$hosts" --hostgroups="$hostgroups"
    fi
    name=${BASH_REMATCH[1]}
  fi

  if [[ $line =~ $RE_MEMBERS ]]; then
    hosts=${BASH_REMATCH[1]}
  fi

  if [[ $line =~ $RE_MEMBER_GROUPS ]]; then
    hostgroups=${BASH_REMATCH[1]}
  fi
done < $file
$debug ipa hostgroup-add-member $name --hosts="$hosts" --hostgroups="$hostgroups"