root@dc2:/home/eida# samba-tool domain join eida.lan DC -U eida --dns-backend=BIND9_DLZ
INFO 2021-03-06 23:24:56,464 pid:723 /usr/lib/python3/dist-packages/samba/join.py #107: Finding a writeable DC for domain 'eida.lan'
INFO 2021-03-06 23:24:56,479 pid:723 /usr/lib/python3/dist-packages/samba/join.py #109: Found DC dc1.eida.lan
Password for [EIDA\eida]:
...
INFO 2021-03-06 23:25:18,637 pid:723 /usr/lib/python3/dist-packages/samba/join.py #1559: Joined domain EIDA (SID S-1-5-21-X-Y-Z) as a DC

root@dc2:/home/eida# cp /var/lib/samba/private/krb5.conf /etc

root@dc2:/home/eida# chmod 0644 /etc/krb5.conf

root@dc2:/home/eida# cat /etc/krb5.conf
[libdefaults]
	default_realm = EIDA.LAN
	dns_lookup_realm = false
	dns_lookup_kdc = true

[realms]
EIDA.LAN = {
	default_domain = eida.lan
}

[domain_realm]
	DC2 = EIDA.LAN

root@dc2:/home/eida# samba-tool drs showrepl
Default-First-Site-Name\DC2
DSA Options: 0x00000001
DSA object GUID: f9e268d7-X-Y-Z-3787aad77574
DSA invocationId: b1c9ce40-X-Y-Z-4a3d8fd9033d

==== INBOUND NEIGHBORS ====

CN=Configuration,DC=eida,DC=lan
	Default-First-Site-Name\DC1 via RPC
		DSA object GUID: d2bd2987-A-B-C-5ba7691aadef
		Last attempt @ Sat Mar  6 23:39:36 2021 CET was successful
		0 consecutive failure(s).
		Last success @ Sat Mar  6 23:39:36 2021 CET
		...

==== OUTBOUND NEIGHBORS ====

CN=Configuration,DC=eida,DC=lan
	Default-First-Site-Name\DC1 via RPC
		DSA object GUID: d2bd2987-A-B-C-5ba7691aadef
		Last attempt @ NTTIME(0) was successful
		0 consecutive failure(s).
		Last success @ NTTIME(0)
		...

==== KCC CONNECTION OBJECTS ====

Connection --
	Connection name: 5a4b78fa-A-B-C-eca1e621c4de
	Enabled        : TRUE
	Server DNS name : dc1.eida.lan
	Server DN name  : CN=NTDS Settings,CN=DC1,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=eida,DC=lan
		TransportType: RPC
		options: 0x00000001
Warning: No NC replicated for Connection!