Stefan G. Weichinger
2019-Nov-26 20:23 UTC
[Samba] 4.9.x -> 4.10.x : any major things to consider?
Am 26.11.19 um 20:53 schrieb Stefan G. Weichinger via samba:> Am 26.11.19 um 20:50 schrieb Rowland penny via samba: >> On 26/11/2019 19:44, Stefan G. Weichinger via samba wrote: >>> Am 26.11.19 um 20:39 schrieb Rowland penny via samba: >>> >>>>> I assume I have to start over: demote that DC2 etc >>>>> >>>>> Should have left office when I could an hour ago. >>>>> >>>> Definitely sounds like you should, you are probably tired and it is >>>> easy? to make mistakes when you are tired. >>> So you suggest to let the domain run on ADC1 only ... and do the >>> demoting etc tmrw ? >>> >>> Sounds right. Although it would also feel good to fix it before bed. >>> >>> >>> >> If the domain is going to get little use overnight, then yes, you could >> do this, but I was really referring to not doing things when you are >> tired ;-) >> >> If you are going to let the domain run overnight on one DC, then I would >> demote the second DC before you go home ;-) > > I *am* at home, that's even more sad ;-) > > And why not "rejoin" as well ... ?I think I won't demote right now and just leave it as it is. So far the shares etc work fine ... the samba-ad-dc.service doesn't even start so I assume it won't make much difference (no communication anyway)? I could shutdown the whole server. - I plan to demote DC2 ("adc2"= hostname) remotely tomorrow. After that I would like to learn how to re-add it. https://wiki.samba.org/index.php/Demoting_a_Samba_AD_DC#Demoting_an_Offline_Domain_Controller says: "You must not reconnect a DC to the network, that was demoted remotely. Your AD can get inconsistent." which scares me a bit. What does that mean exactly? I have to reconnect with the same old hostname, but is it sufficient if I clear adc2:/var/lib/samba before to make it a brandnew machine? thanks all, good night and good backups
Rowland penny
2019-Nov-26 20:37 UTC
[Samba] 4.9.x -> 4.10.x : any major things to consider?
On 26/11/2019 20:23, Stefan G. Weichinger via samba wrote:> Am 26.11.19 um 20:53 schrieb Stefan G. Weichinger via samba: >> Am 26.11.19 um 20:50 schrieb Rowland penny via samba: >>> On 26/11/2019 19:44, Stefan G. Weichinger via samba wrote: >>>> Am 26.11.19 um 20:39 schrieb Rowland penny via samba: >>>> >>>>>> I assume I have to start over: demote that DC2 etc >>>>>> >>>>>> Should have left office when I could an hour ago. >>>>>> >>>>> Definitely sounds like you should, you are probably tired and it is >>>>> easy? to make mistakes when you are tired. >>>> So you suggest to let the domain run on ADC1 only ... and do the >>>> demoting etc tmrw ? >>>> >>>> Sounds right. Although it would also feel good to fix it before bed. >>>> >>>> >>>> >>> If the domain is going to get little use overnight, then yes, you could >>> do this, but I was really referring to not doing things when you are >>> tired ;-) >>> >>> If you are going to let the domain run overnight on one DC, then I would >>> demote the second DC before you go home ;-) >> I *am* at home, that's even more sad ;-) >> >> And why not "rejoin" as well ... ? > I think I won't demote right now and just leave it as it is. So far the > shares etc work fine ... > > the samba-ad-dc.service doesn't even start so I assume it won't make > much difference (no communication anyway)? I could shutdown the whole > server. > > - > > I plan to demote DC2 ("adc2"= hostname) remotely tomorrow. > > After that I would like to learn how to re-add it. > > https://wiki.samba.org/index.php/Demoting_a_Samba_AD_DC#Demoting_an_Offline_Domain_Controller > > says: > > "You must not reconnect a DC to the network, that was demoted remotely. > Your AD can get inconsistent." > > which scares me a bit. What does that mean exactly? I have to reconnect > with the same old hostname, but is it sufficient if I clear > adc2:/var/lib/samba before to make it a brandnew machine? > > thanks all, good night and good backups > >Ah, that could be worded better ;-) What it means is: If a DC fails for some reason and is stopped and then demoted on another DC (the failed DC is no longer a DC), you must not simply fix the old DC and restart it. This is because the domain no longer recognises the demoted DC, but it will still think it is a DC and will try to replicate to and from the domain, this will destroy your domain. Rowland
Stefan G. Weichinger
2019-Nov-26 20:54 UTC
[Samba] 4.9.x -> 4.10.x : any major things to consider?
Am 26.11.19 um 21:37 schrieb Rowland penny via samba:> Ah, that could be worded better ;-) > > What it means is: > > If a DC fails for some reason and is stopped and then demoted on another > DC (the failed DC is no longer a DC), you must not simply fix the old DC > and restart it. This is because the domain no longer recognises the > demoted DC, but it will still think it is a DC and will try to replicate > to and from the domain, this will destroy your domain.So if I not only fix DC-old but install it from scratch (= clean /var/lib/samba ... anything else?) that will work?