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Martin Hope
Fang
Asked: 2023-11-28 18:13:03 +0800 CST
  • 5

We are running a preseeded Ubuntu installation from disk using ubuntu autoinstall (https://ubuntu.com/server/docs/install/autoinstall)

Since upgrading to 20.04.6, we are facing issues when the cloud-init mechanism detects a DHCP server on the network, which crashes the installation.

Is it possible to disable any networking during cloud-init?

Our grub.cfg looks like this:

menuentry "custom install " {
    set gfxpayload=keep
    linux   /casper/vmlinuz quiet autoinstall ds=nocloud\;s=/cdrom/nocloud/ ---
    initrd  /casper/initrd
}
cloud-init
Martin Hope
Fang
Asked: 2019-05-17 01:48:04 +0800 CST
  • 0

I'm using OpenLDAP on Ubuntu 16.04.

My endgame is to use an LDAP directory as basis for a Samba 4 NT domain (legacy reasons).

When I run slapcat, I see all data that I have entered into the LDAP.

However, when I run slapd and execute

ldapsearch -H ldapi:/// -Y EXTERNAL -b "cn=config" -LLL -Q "olcDatabase=*"

my search yields "no such object (32)".

Why is that so? The configuration directory is clearly there under /etc/ldap/slapd.d/ and is being considered when running slapd.

I suspect it has something to do with authentication.

ldap
Martin Hope
Fang
Asked: 2019-04-26 04:33:35 +0800 CST
  • 3

I've set up an AD domain controller through Samba 4. I'm using Samba 4's internal DNS Server for handling the SRV queries.

However, due to project requirements, my clients need to have a DNSMASQ as their one and only DNS server.

Thus, my plan was to forward all queries which DNSMASQ can't handle to the Samba 4 server.

Let's assume the IP addresses of the servers are like this:

Server with DNSMASQ: 192.168.0.10

Server with SAMBA4: 192.168.0.11

To achieve that, I have added the following line to my DNSMASQ.conf:

server=192.168.0.11

After restarting DNSMASQ, it is not forwarding SRV quries to the SAMBA 4 DC. If I add the following line:

srv-host= _ldap._tcp.dc._msdcs.domain.example.com

the query gets forwarded, but the clients still can't join the domain. I get the following error message:

Host(A) or (AAAA) records that map the names of the domain controllers to their IP addresses are missing or contain incorrect addresses

Domain controllers registered in DNS are not connected to the network or are not running.

I assume there are still DNS problems, so these are my questions:

  • Is what I want to do possible at all?
  • Is there a way to just forward all SRV queries to another host with DNSMASQ?
  • Why is the server=192.168.0.11 line not working? Am I missing anything there?
domain-name-system