On Wednesday, May 25, 2011 03:55:55 AM Peter Vrabec wrote: > Hi, > > On Tuesday, May 24, 2011 05:25:44 PM Toshio Kuratomi wrote: > > On Tue, May 24, 2011 at 1:59 AM, Peter Vrabec <pvrabec@xxxxxxxxxx> wrote: > > > Hi all, > > > > > > I'd like to inform you that I have changed UID_MIN & GID_MIN from 500 > > > to 1000 in upgraded shadow-utils. > > > > > > Where? > > > /etc/login.defs. > > > shadow-utils-4.1.4.3-1.fc16 > > > > > > I suppose UID/GID_MIN=1000 is more common(other distros, upstream). We > > > are not in situation that 500 IDs for system accounts ought to be > > > enough for anybody. Actually, it was not 500.It was 299 because range > > > 0-200 is for reserved IDs. There are 799 non reserved IDs for system > > > accounts available after this change. > > > > This change should be made as a Feature for F16 and needs some > > thought/coordination put behind it. There's several issues that I > > see: > > > > * AFAIK, we actually have not run into the 500 uid limit yet (although > > it is a bit low to be comfortable) > > * AFAIK, we've only allocated the range 0-100 for reserved IDs. > > * The 0-100 reserved IDs are actually the pain point that we need to > > deal with, not the dynamic system ids in the 101-499 range. > > We use 0-200 for reserved IDs since > http://lists.fedoraproject.org/pipermail/devel/2009-April/028740.html there was no change ever done there. the discussion was minimal to say the least. > > * We don't know how many, if any IDs this actually gets us for the > > dynamic range because any site that has already filled the 500-1000 > > UID range won't gain any extra dynamic system account through this > > change. > > * This could potentially break sites that are currently using the > > 500-1000 UID range and rely on the order of allocation of UIDs for > > their users on new machines matching with the UIDs on old machines. > > (For instance, NFS UIDs on filesystems matching between a box > > installed with RHEL5 and a box that gets newly installed with F16). > > > > -Toshio > > I'm not against wider announcement. I'm just not sure what is the right way > - F16 Feature/Release Notes/ .... ? We can also annouce the 200 limit for > reserved IDs. ;) another issue that i thought of was existing ldap/nis systems that allocate regular users in the 500-1000 range when installing or upgrading if they use policies that probit system accounts from logging in will have users unable to login. Dennis
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