4.5. Migrating netgroup entries from NIS to IdM

Procedure

1. Install the yp-tools package:

   [root@nis-server ~]# dnf install yp-tools -y

2. Create the /root/nis-netgroups.sh script with the following content on the NIS server:

   #!/bin/sh
   # $1 is the NIS domain, $2 is the primary NIS server
   ypcat -k -d $1 -h $2 netgroup > /dev/shm/nis-map.netgroup 2>&1
   
   IFS=$'\n'
   for line in $(cat /dev/shm/nis-map.netgroup); do
   	IFS=' '
   	netgroupname=$(echo $line | awk '{print $1}')
   	triples=$(echo $line | sed "s/^$netgroupname //")
   	echo "ipa netgroup-add $netgroupname --desc=NIS_NG_$netgroupname"
   	if [ $(echo $line | grep "(," | wc -l) -gt 0 ]; then
   		echo "ipa netgroup-mod $netgroupname --hostcat=all"
   	fi
   	if [ $(echo $line | grep ",," | wc -l) -gt 0 ]; then
   		echo "ipa netgroup-mod $netgroupname --usercat=all"
   	fi
   
   	for triple in $triples; do
   		triple=$(echo $triple | sed -e 's/-//g' -e 's/(//' -e 's/)//')
   		if [ $(echo $triple | grep ",.*," | wc -l) -gt 0 ]; then
   			hostname=$(echo $triple | cut -f1 -d,)
   			username=$(echo $triple | cut -f2 -d,)
   			domain=$(echo $triple | cut -f3 -d,)
   			hosts=""; users=""; doms="";
   			[ -n "$hostname" ] && hosts="--hosts=$hostname"
   			[ -n "$username" ] && users="--users=$username"
   			[ -n "$domain"   ] && doms="--nisdomain=$domain"
   			echo "ipa netgroup-add-member $netgroup $hosts $users $doms"
   		else
   			netgroup=$triple
   			echo "ipa netgroup-add $netgroup --desc=<NIS_NG>_$netgroup"
   		fi
   	done
   done

3. Authenticate as the IdM admin user:

   [root@nis-server ~]# kinit admin

4. Run the script. For example:

   [root@nis-server ~]# sh /root/nis-netgroups.sh nisdomain nis-server.example.com