#### 第八单元. ldap网络用户账户 ####
1.LDAP网络用户
ldap目录服务认证，和windows活动目录类似，就是记录数据的一种方式

2.ldap客户端所须软件
yum sssd krb5-wordstation -y

3.如何开启ldap用户认证
authconfig-tui
┌────────────────┤ Authentication Configuration ├─────────────────┐
│                                                                                                            │
│  User Information        Authentication                         │
│  [ ] Cache Information   [ ] Use MD5 Passwords                  │
│  [*] Use LDAP            [*] Use Shadow Passwords               │
│  [ ] Use NIS             [ ] Use LDAP Authentication            │
│  [ ] Use IPAv2           [*] Use Kerberos                       │
│  [ ] Use Winbind         [ ] Use Fingerprint reader             │
│                                              [ ] Use Winbind Authentication│
│                                              [*] Local authorization is sufficient│
│                                                                                                            │
│            ┌────────┐                      ┌──────┐             │
│            │ Cancel       │                     │ Next      │             │
│            └────────┘                      └──────┘             │
│                                                                 │
│                                                                 │
└─────────────────────────────────────────────────────────────────┘
                                                                                           


┌─────────────────┤ LDAP Settings ├─────────────────┐
│                                                   │
│          [*] Use TLS                              │
│  Server: ldap://classroom.example.com/___________ │
│ Base DN: dc=example,dc=com_______________________ │
│                                                   │
│         ┌──────┐                ┌──────┐          │
│         │ Back      │               │ Next │          │
│         └──────┘                └──────┘          │
│                                                   │
│                                                   │
└───────────────────────────────────────────────────┘
                                                      



┌─────────────────┤ Kerberos Settings ├──────────────────┐
│                                                        │
│        Realm: EXAMPLE.COM_____________________________ │
│          KDC: classroom.example.com___________________ │
│ Admin Server: classroom.example.com___________________ │
│               [ ] Use DNS to resolve hosts to realms   │
│               [ ] Use DNS to locate KDCs for realms    │
│                                                        │
│          ┌──────┐                    ┌────┐            │
│          │ Back      │                    │ Ok │            │
│          └──────┘                    └────┘            │
│                                                        │
│                                                        │
└────────────────────────────────────────────────────────┘
                                                          
<当出现以下报错时>

┌────────────────┤ Warning ├─────────────────┐
│                                            │
│ To connect to a LDAP server with TLS       │
│ protocol enabled you need a CA certificate │
│ which signed your server‘s certificate.    │
│ Copy the certificate in the PEM format to  │
│ the ‘/etc/openldap/cacerts‘ directory.     │
│ Then press OK.                             │
│                                            │
│                  ┌────┐                    │
│                  │ Ok │                    │
│                  └────┘                    │
│                                            │
│                                            │
└────────────────────────────────────────────┘

 出现这种情况时 因为tls的证书缺失，需要到服务器端下载所需要的证书到/etc/openldap/cacerts,用到的命令
wget http://172.25.254.254/pub/example-ca.crt

<测试>
getent passwd ldapuser1
如果用户信息可以正常显示，证明客户端认证成功。

列出所有用户
vim /etc/sssd/sssd.conf
enumerate = True
systemctl restart sssd

4.自动挂在用户家目录
yum install autofs -y
vim /etc/autofs.master
/home/guests   /etcauto.ldap

vim /etc/auto.ldap
ldapuser1   172.25.254.254:/home/guests/ldapuser1
++++++++++++++++++++++++++++++++++++++++++++
*           172.25.254.254:/home/guests/&

systemctl restart autofs
systemctl enable autofs

####   ldap脚本      ####
#！/bin/bash
echo "install software ing ..."
yum install sssd krb5-workstation autofs -y  &> /dev/null

echo "config ldap auth client ing ..."
authconfig \
--enableldap \
--enablekrb5 \
--disabledapauth \
--enableldaptls \
--ldaploadcacert-http://172.25.254.254/pub/example-ca.crt \
--ldapserver="classroom.example.com" \
--ldapbasedn="dc=example,dc=com" \
--krb5kdc="EXAMPLE.COM" \
--krb5adminserver="classroom.example.com" \
--enablesssd \
--enablesssdauth \
--update

echo "config ldap user\‘s home directory ing ..."
echo /home/guests    /etc/auto.ldap >> /etc/auto.master
echo "*          172.25.254.254:/home/guests/&" >> /etc/auto.ldap
systemctl restart autofs
systemctl enable autofs &> /dev/null

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二.第八单元 ldap网络用户