We currently use a combination of Kerberos and NIS to manage users on our 
CentOS 6 systems in a Windows AD environment.  NIS is provided by Windows 
Services for UNIX (or something named similarly), which has some issues, and is 
also not going to be supported by Microsoft in the future.  NIS supplies the 
passed file as well as the auto mount map for home directories as shown by this 
excerpt from our /etc/nsswitch.conf file:

  passwd:     files nis
  shadow:     files nis
  group:      files nis

 Our systems are configured using something similar to the following in our 
Kickstart config file:

  authconfig --enablemd5 --passalgo=sha512 --enablenis —nisdomain=XXX \
  --nisserver=nis.XXX.com,nis2.XXX.com --useshadow --enablekrb5 \ 
  --krb5realm=XXX.COM --krb5kdc=ldap.XXX.com --krb5adminserver=ldap.XXX.com 
<http://ldap.xxx.com/>

where nis1 and nis2 are the local AD domain controllers.  With this 
configuration, any user can log into any CentOS system, and their home 
directory is automatically mounted over NFS with autofs.  This works great, 
except for when the network is down and/or the home directory NFS server is not 
available, when the systems pretty much just hang.  It’s also only good for 
workstations and servers, but not laptops that may not be on the network.

I would like to move to CentOS 7 and a model where we don’t use NIS at all, the 
users and (local) home directories are automatically created on login using the 
UID stored on the LDAP server. Before I re-invent the wheel, has somebody done 
this already?  If so, can you share the authconfig line from your Kickstart 
file?  To summarize, I’d like to:

Use LDAP/Kerberos provided by Windows AD servers to authenticate users
Automatically create accounts/home directories upon first login
Not require the system to be on the network (provided the user has logged in at 
least once to create the account locally)

Thanks in advance for any suggestions/examples.

Alfred

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