场景如下：
我有两台机器：
Ubuntu，运行 ldap 来验证用户身份
CentOs，使用 winbind 验证用户身份
为了挂载主目录，我使用 fstab 和 nfs 共享。
问题是这样的：
在 Ubuntu 上，在 getent passwd 中用户看起来像这样：
john:x:3000052:1901:John Doe:/home/john:/bin/bash
但在 CentOs 上，同一个用户在 getent passwd 中使用如下命令：
john:*:16777228:16777218:John Doe:/home/john:/bin/bash
如您所见，UID 和 GID 不匹配，这导致当用户尝试访问 CentOS 上的 homefoler 时权限被拒绝。对于 AD 用户，我希望 CentOS 具有与 Ubuntu 完全相同的 UID 和 GID。
我设法在 smb.conf 中找到有关 idmap 的一些信息，但我还没有让它工作。
[global]
idmap workgroup = MOSEK
idmap config MOSEK:backend = rid
idmap config MOSEK:base_rid = 0
idmap config MOSEK:range = 3000040 - 4999999
#--authconfig--start-line--
# Generated by authconfig on 2014/09/30 08:26:52
# DO NOT EDIT THIS SECTION (delimited by --start-line--/--end-line--)
# Any modification may be deleted or altered by authconfig in future
workgroup = MOSEK
...autogenerated stuff
#--authconfig--end-line--
但这不起作用。
我希望我清楚自己在做什么
编辑：
好的，这就是 authconfig 为我生成的内容。由于您的回答，我认为这可能相关。
#--authconfig--start-line--
# Generated by authconfig on 2014/09/30 08:26:52
# DO NOT EDIT THIS SECTION (delimited by --start-line--/--end-line--)
# Any modification may be deleted or altered by authconfig in future
workgroup = MOSEK
password server = nyborg.mosek.zentyal
realm = MOSEK.ZENTYAL
security = ads
idmap config * : range = 1000-999999
template homedir = /home/%U
template shell = /bin/bash
kerberos method = secrets only
winbind use default domain = true
winbind offline logon = false
winbind enum users = true
winbind enum groups = true
winbind cache time = 5
winbind nested groups = true
winbind enum users = true
winbind enum groups = true
winbind cache time = 5
winbind nested groups = true
winbind enum groups = true
winbind cache time = 5
winbind nested groups = true
winbind cache time = 5
winbind nested groups = true
winbind nested groups = true
winbind enum users = true
winbind enum groups = true
winbind cache time = 5
winbind nested groups = true
winbind enum groups = true
winbind cache time = 5
winbind nested groups = true
winbind cache time = 5
winbind nested groups = true
winbind nested groups = true
winbind enum groups = true
winbind cache time = 5
winbind nested groups = true
winbind cache time = 5
winbind nested groups = true
winbind nested groups = true
winbind cache time = 5
winbind nested groups = true
winbind nested groups = true
winbind nested groups = true
winbind enum users = true
winbind enum groups = true
winbind cache time = 5
winbind nested groups = true
winbind enum groups = true
winbind cache time = 5
winbind nested groups = true
winbind cache time = 5
winbind nested groups = true
winbind nested groups = true
winbind enum groups = true
winbind cache time = 5
winbind nested groups = true
winbind cache time = 5
winbind nested groups = true
winbind nested groups = true
winbind cache time = 5
winbind nested groups = true
winbind nested groups = true
winbind nested groups = true
winbind enum groups = true
winbind cache time = 5
winbind nested groups = true
winbind cache time = 5
winbind nested groups = true
winbind nested groups = true
winbind cache time = 5
winbind nested groups = true
winbind nested groups = true
winbind nested groups = true
winbind cache time = 5
winbind nested groups = true
winbind nested groups = true
winbind nested groups = true
winbind nested groups = true
winbind enum users = true
winbind enum groups = true
winbind cache time = 5
winbind nested groups = true
winbind enum groups = true
winbind cache time = 5
winbind nested groups = true
winbind cache time = 5
winbind nested groups = true
winbind nested groups = true
winbind enum groups = true
winbind cache time = 5
winbind nested groups = true
winbind cache time = 5
winbind nested groups = true
winbind nested groups = true
winbind cache time = 5
winbind nested groups = true
winbind nested groups = true
winbind nested groups = true
winbind enum groups = true
winbind cache time = 5
winbind nested groups = true
winbind cache time = 5
winbind nested groups = true
winbind nested groups = true
winbind cache time = 5
winbind nested groups = true
winbind nested groups = true
winbind nested groups = true
winbind cache time = 5
winbind nested groups = true
winbind nested groups = true
winbind nested groups = true
winbind nested groups = true
winbind enum groups = true
winbind cache time = 5
winbind nested groups = true
winbind cache time = 5
winbind nested groups = true
winbind nested groups = true
winbind cache time = 5
winbind nested groups = true
winbind nested groups = true
winbind nested groups = true
winbind cache time = 5
winbind nested groups = true
winbind nested groups = true
winbind nested groups = true
winbind nested groups = true
winbind cache time = 5
winbind nested groups = true
winbind nested groups = true
winbind nested groups = true
winbind nested groups = true
winbind nested groups = true
#--authconfig--end-line--
EDIT2：当我尝试授予 sssd.conf 正确的权限时，出现了一个新的错误：
[root@centosy sssd]# journalctl -xn
-- Logs begin at Mon 2014-10-06 10:14:59 CEST, end at Tue 2014-10-07 10:28:42 CEST. --
Oct 07 10:28:36 centosy.mosek.zentyal sssd[be[5567]: Starting up
Oct 07 10:28:38 centosy.mosek.zentyal sssd[be[5568]: Starting up
Oct 07 10:28:41 centosy.mosek.zentyal sssd[5570]: Starting up
Oct 07 10:28:41 centosy.mosek.zentyal sssd[5569]: Starting up
Oct 07 10:28:41 centosy.mosek.zentyal sssd[5571]: Starting up
Oct 07 10:28:41 centosy.mosek.zentyal sssd[5572]: Starting up
Oct 07 10:28:42 centosy.mosek.zentyal sssd[be[5573]: Starting up
Oct 07 10:28:42 centosy.mosek.zentyal systemd[1]: sssd.service: control process exited, code=exited status=1
Oct 07 10:28:42 centosy.mosek.zentyal systemd[1]: Failed to start System Security Services Daemon.
-- Subject: Unit sssd.service has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit sssd.service has failed.
--
-- The result is failed.
Oct 07 10:28:42 centosy.mosek.zentyal systemd[1]: Unit sssd.service entered failed state.
编辑3：
好的，我遵循了你的指南，以下是我从头到尾所做的事情：
[root@centosy sssd]# authconfig --update --disableldap --ldapbasedn="dc=mosek,dc=zentyal" --ldapserver="ldap://172.16.0.5" --enablerfc2307bis --disablekrb5 --enablekrb5kdcdns --krb5realm=mosek.zentyal --enablesssd --enablesssdauth --enablemkhomedir --enablepamaccess --enablelocauthorize --smbrealm=mosek.zentyal --smbservers=nyborg.mosek.zentyal --smbworkgroup=MOSEK --smbsecurity=ads
getsebool: SELinux is disabled
[root@centosy sssd]# net ads join createupn=host/`hostname -f`@MOSEK.ZENTYAL -U tomas
Ignoring unknown parameter "idmap workgroup"
Ignoring unknown parameter "idmap workgroup"
Enter tomas's password:
Using short domain name -- MOSEK
Joined 'CENTOSY' to dns domain 'mosek.zentyal'
这是我的 sssd.conf：
[sssd]
config_file_version = 2
domains = mosek.zentyal
services = nss, pam
debug_level = 0
[nss]
[pam]
[domain/mosek.zentyal]
debug_level = 5
cache_credentials = false
enumerate = false
id_provider = ldap
auth_provider = krb5
chpass_provider = krb5
access_provider = ldap
ldap_sasl_mech = GSSAPI
ldap_sasl_authid = host/[email protected]
ldap_sasl_canonicalize = false
ldap_user_search_base = ou=Users,dc=mosek,dc=zentyal
ldap_user_object_class = user
ldap_user_home_directory = unixHomeDirectory
ldap_user_name = sAMAccountName
ldap_user_shell = loginShell
ldap_group_name = msSFU30Name
ldap_group_object_class = group
ldap_group_search_base = ou=Groups,dc=mosek,dc=zentyal
ldap_access_order = expire
ldap_account_expire_policy = ad
ldap_force_upper_case_realm = true
ldap_disable_referrals = true
ldap_id_mapping = false
ldap_schema = rfc2307bis
krb5_realm = MOSEK.ZENTYAL
krb5_canonicalize = false
krb5_server = mosek.zentyal
所以现在我重新启动 sssd：
[root@centosy sssd]# service sssd restart
Redirecting to /bin/systemctl restart sssd.service
编辑4：
这是我的 nsswitch.conf：
passwd: files sss
shadow: files sss
group: files sss
hosts: files dns
bootparams: nisplus [NOTFOUND=return] files
ethers: files
netmasks: files
networks: files
protocols: files
rpc: files
services: files sss
netgroup: files sss
publickey: nisplus
automount: files sss
aliases: files nisplus
答案1
您遇到的问题是使用rididmap。
它使用一种算法为您在范围内设置的限制之间的 UID 生成一个随机数，该数字在主机之间始终不同。
您需要的是adsidmap，但是，这意味着 id 需要存在于 AD 和 ldap 中。
如果您只关心访问 UNIX 组和基本属性，而不是所有 AD 组，则 winbind 不是必需的。
配置 kerberos 填充并具有类似于以下内容的/etc/krb5.conf内容：smb.conf
[global] workgroup = ADIRE client signing = yes client use spnego = yes kerberos method = secrets and keytab log file = /var/log/samba/%m.log password server = adire.XXX.XX.uk realm = ADIRE.XXX.XXX.UK security = ads client ldap sasl wrapping = sign
为了使这更容易，您可以让 sssd 控制这一切，但首先要让它工作起来！
一个好的总体想法是，你有哪些选择这里。
要配置 CentOS 主机以使用具有 LDAP 属性的 AD 身份验证，您可以使用以下 authconfig 命令（替换域详细信息）：
authconfig --update --disableldap --ldapbasedn="dc=adire,dc=domain,dc=co,dc=uk" --ldapserver="ldap://ad1.adire.domain.co.uk:ldap://ad2.adire.domain.co.uk" --enablerfc2307bis --disablekrb5 --enablekrb5kdcdns --krb5realm=ADIRE.DOMAIN.CO.UK --enablesssd --enablesssdauth --enablemkhomedir --enablepamaccess --enablelocauthorize --smbrealm=ADIRE.DOMAIN.CO.UK --smbservers="ad1.adire.domain.co.uk ad2.adire.domain.co.uk" --smbworkgroup=ADIRE --smbsecurity=ads
然后将主机加入域并创建 kerberos/etc/krb5.keytab文件：
net ads join createupn=host/`hostname -f`@ADIRE.DOMAIN.CO.UK -U priviledged_user
kinit @ADIRE.DOMAIN.CO.UK
net ads keytab create
net ads keytab add host/`hostname -f`@ADIRE.DOMAIN.CO.UK
这将使sssd你可以在（）中拥有所有的映射/etc/sssd/sssd.conf：
[sssd]
config_file_version = 2
domains = adire.domain.co.uk
services = nss, pam
debug_level = 0
[nss]
[pam]
[domain/adire.domain.co.uk]
debug_level = 5
cache_credentials = false
enumerate = false
id_provider = ldap
auth_provider = krb5
chpass_provider = krb5
access_provider = ldap
ldap_sasl_mech = GSSAPI
ldap_sasl_authid = host/[email protected]
ldap_sasl_canonicalize = false
ldap_user_search_base = OU=User Accounts,DC=adire,DC=domain,DC=co,DC=uk
ldap_user_object_class = user
ldap_user_home_directory = unixHomeDirectory
ldap_user_name = sAMAccountName
ldap_user_shell = loginShell
ldap_group_name = msSFU30Name
ldap_group_object_class = group
ldap_group_search_base = OU=Groups,DC=adire,DC=domain,DC=co,DC=uk
ldap_access_order = expire
ldap_account_expire_policy = ad
ldap_force_upper_case_realm = true
ldap_disable_referrals = true
ldap_id_mapping = false
ldap_schema = rfc2307bis
krb5_realm = ADIRE.DOMAIN.CO.UK
krb5_canonicalize = false
krb5_server = adire.domain.co.uk
确保设置sssd为在启动时启动，并在运行 authconfig 命令并加入域后重新启动。