[Samba] Ubuntu 20.04 setup

[L.P.H. van Belle]

Hai Greg, 

> -----Oorspronkelijk bericht-----
> Van: samba [mailto:samba-bounces at lists.samba.org] Namens 
> Gregory Sloop via samba
> Verzonden: donderdag 4 juni 2020 19:17
> Aan: samba at lists.samba.org
> Onderwerp: [Samba] Ubuntu 20.04 setup
> 
> Louis, et al. Hi!
> 
> So, I'm working on a 20.04 setup. 
> I think I'll still use the distro version and not Louis' 
> packages. [No offense Louis - I just need to be sure if 
> (forbid) anything happens to Louis, his packages aren't going 
> to be supported any more, and I'll be on my own for security 
> updates etc. The 20.04 versions are pretty current, and I 
> think will meet my needs for the life of the distro. If not, 
> I can always re-evaluate that at the time.]

Ah, totaly understandable and i get that.  No worries ;-) 
So if i suddenly would get run over with a train, what then
Well, simple switch back to official packages, using these commands.

apt-get remove samba winbind samba-* --autoremove 
apt-get install samba winbind
And your done. ;-) 

You only miss spotlight support then. 

But im lucky, so far i dont see trains here ;-) 

> 
> So, is there anything new in 20.04 I need to be aware of vs 
> 18.04? systemd.resolved seemed to be the biggest "gotcha" previously.
> Anything else that's different in 20.04 I should be aware of?

You can still use that howto yes, i have a new base for 20.04 but not finished.
Cant post it yet. But after today i have 3 weeks vacation, i'll do some howto updating
Since i took the best weeks for vacation.. with rain.. :-( 
and not going anywhere, Its still to soon in my opinion for that. 


> I'm planning on using the 18.04 walk-through you [Louis] did 
> 18mo or so ago - with a few changes to meet my needs. (eg. 
> I'm using internal DNS, not BIND9, etc.)

Well, on that part, if you switch to full systemd setup. 
what i personaly do like, you need to "correclty" remove/switch on ubuntu. 
Or completly remove netplan and all crap that was added and configure systemd-networkd manualy
Or use netplan to configure it and use 
https://websiteforstudents.com/how-to-setup-static-fixed-ip-on-ubuntu-20-04-18-04/ 
I just dont like netplan so i remove it, thats a choice. 

If you use multihoming/multiple interfaces. 
Dont configure : /etc/systemd/resolv.conf 

Configure DNS and routings withing the needed interface ( can be in mutiple files as look you watch the loading order. ) 
Eth0 (lan) -> DNS samba 
Eth1 (wan) -> DNS internet 

On AD-DC, use ntp, oblicated. (due sntp and AD to distribute time to pc's), 
i dont advice chrony. But again thats personal, chrony should work.

On members, dont install ntp, just not needed, configure systemd-timesyncd point to AD-DC ips. 

And last tips if you use systemd, is optimze your boot process. 
systemd-analyze plot > boot-prosess.svg 
IF you use that and are optimizing the boot process.
Use : systemctl edit servicename 

That keeps everything clean and that avoids touching/adjusting by debian/system suplied files.

Test that a bit, and if you boot setup if perfect. Enable unattended upgrades, yes then you can. 
My boot prio is. 
- wait for network
- enable bind
- enable ntp
- enable samba 

A simple example on smbd ( this applies for all samba services but you need to to it for nmbd smbd samba samba-ad-dc ) 

systemctl edit smbd
[Unit]
Wants=network-online.target
After=network.target network-online.target nmbd.service winbind.service bind9.service

All i add here is : bind9.service ntp.service
Save and done.

If you dont use it, fine also but now its always starting correctly if you use bind9 or ntp or not. 


Greetz, 

Louis