从 Ubuntu 20.04 开始，我们使用 SSSD 和 realmd 将这些服务器加入到我们的一个 Active Directory 域中。这几乎是开箱即用的。
然而，对于 Ubuntu 22.04，我们遇到了问题。而且我没有可行的解决方案，因此我提出了这个问题。
我们的组织有 1 个 AD 林。在这个林中，我们有一个名为“例子.local“。此域有几个子域，”产品.示例.本地“，”用户.示例.本地“，”acc.示例.local“。”用户.示例.本地“ 有一个名为 的子域 ”dev.users.示例.local“。此域具有对”的快捷信任产品.示例.本地“（记住这一点很重要）。
当服务器加入域时“dev.users.示例.local“，用户（来自林中的任何域）都应该能够登录到服务器。
这在 Ubuntu 20.04（使用 SSSD 版本 2.2.3）上按预期工作。在 Ubuntu 22.04 上，只有来自加入域（dev.users.example.local）和具有快捷方式信任的域的用户才会被找到并能够登录到服务器。
我们尝试使用 sssctl 调试这个问题。
跑步sssctl domain-list
返回结果：
- dev.users.示例.local
- 产品.示例.本地
预期结果：
- dev.users.示例.local
- 用户.示例.本地
- 例子.local
- 产品.示例.本地
- acc.示例.local
SSSD 版本：
- Ubuntu 22.04：2.6.3
- Ubuntu 20.04：2.2.3
这是我们对 SSSD 的配置（在 Ubuntu 20.04 上按预期运行）：
[sssd]
domains = dev.users.example.local
config_file_version = 2
services = nss, pam
debug_level = 9
[domain/dev.users.example.local]
# Offline logins
# cache_credentials = true
# Providers
id_provider = ad
auth_provider = ad
access_provider = simple
# Uncomment if you want to use POSIX UIDs and GIDs set on the AD side
# ldap_id_mapping = False
# Uncomment if the trusted domains are not reachable
# ad_enabled_domains = ad.example.com
# Set default shell and override AD Home directory
default_shell = /bin/bash
override_homedir = /home/%d/%u
# Comment out if you prefer to use shortnames.
use_fully_qualified_names = True
# AD Specific settings
# ad_use_ldaps = True
debug_level = 9
[nss]
debug_level = 9
[pam]
debug_level = 9
PAM 配置：/etc/pam.d/sshd
# PAM configuration for the Secure Shell service
# Standard Un*x authentication.
@include common-auth
# Disallow non-root logins when /etc/nologin exists.
account required pam_nologin.so
# Uncomment and edit /etc/security/access.conf if you need to set complex
# access limits that are hard to express in sshd_config.
# account required pam_access.so
# Standard Un*x authorization.
@include common-account
# SELinux needs to be the first session rule. This ensures that any
# lingering context has been cleared. Without this it is possible that a
# module could execute code in the wrong domain.
session [success=ok ignore=ignore module_unknown=ignore default=bad] pam_selinux.so close
# Set the loginuid process attribute.
session required pam_loginuid.so
# Create a new session keyring.
session optional pam_keyinit.so force revoke
# Standard Un*x session setup and teardown.
@include common-session
# Print the message of the day upon successful login.
# This includes a dynamically generated part from /run/motd.dynamic
# and a static (admin-editable) part from /etc/motd.
session optional pam_motd.so motd=/run/motd.dynamic
session optional pam_motd.so noupdate
# add to the end (create Home Dir automatically when initial login)
session optional pam_mkhomedir.so skel=/etc/skel umask=077
# Print the status of the user's mailbox upon successful login.
session optional pam_mail.so standard noenv # [1]
# Set up user limits from /etc/security/limits.conf.
session required pam_limits.so
# Read environment variables from /etc/environment and
# /etc/security/pam_env.conf.
session required pam_env.so # [1]
# In Debian 4.0 (etch), locale-related environment variables were moved to
# /etc/default/locale, so read that as well.
session required pam_env.so user_readenv=1 envfile=/etc/default/locale
# SELinux needs to intervene at login time to ensure that the process starts
# in the proper default security context. Only sessions which are intended
# to run in the user's context should be run after this.
session [success=ok ignore=ignore module_unknown=ignore default=bad] pam_selinux.so open
# Standard Un*x password updating.
@include common-password
使用 realmd 我们允许某些 AD 组登录到服务器。
我尝试在 Ubuntu 22.04 上安装新版本（和旧版本 2.2.3）的 SSSD，但无法做到这一点。
我们如何才能在不更改 Active Directory 的情况下实现此功能？我们的配置有什么问题？