pam_mount 经常无法挂载，挂了几分钟

Question

我有一些集中管理的 Ubuntu 工作站，它们根据 Active Directory 对用户进行身份验证，并在使用 pam_mount 登录时挂载用户主文件夹。这通常会按预期工作，但有时主文件夹不会挂载，并且对于每个要挂载的卷，我都会将其放入 /var/log/auth.log：

(mount.c:72): Messages from underlying mount program:
(mount.c:76): mount error(115): Operation now in progress
(mount.c:76): Refer to the mount.cifs(8) manual page (e.g. man mount.cifs)
(pam_mount.c:522): mount of data/users/username/documents failed

它在每个卷上挂起超过 10 秒，因此登录或执行su例如可能需要几分钟。当我在此期间打开另一个终端时，我异常得到

I have no name!@VP-OH-01L:~$

我在syslog：

Jun 11 18:28:16 VP-OH-01L kernel: [35851.544770] Status code returned 0xc000006d NT_STATUS_LOGON_FAILURE
Jun 11 18:28:16 VP-OH-01L kernel: [35851.544787] cifs_vfs_err: 10 callbacks suppressed
Jun 11 18:28:16 VP-OH-01L kernel: [35851.544789] CIFS VFS: Send error in SessSetup = -13
Jun 11 18:28:16 VP-OH-01L kernel: [35851.544912] CIFS VFS: cifs_mount failed w/return code = -13
Jun 11 18:28:26 VP-OH-01L kernel: [35861.554651] CIFS VFS: Error connecting to socket. Aborting operation.
Jun 11 18:28:26 VP-OH-01L kernel: [35861.554822] CIFS VFS: cifs_mount failed w/return code = -115
Jun 11 18:28:36 VP-OH-01L kernel: [35871.564834] CIFS VFS: Error connecting to socket. Aborting operation.
Jun 11 18:28:36 VP-OH-01L kernel: [35871.565010] CIFS VFS: cifs_mount failed w/return code = -115

它仍然登录（并且不会在没有连接时发出有关脱机登录的警告），因此工作站和域之间存在连接。

我将在下面转储我所有的相关配置；对一堵文字墙感到抱歉！在/etc/security/pam_mount.conf.xml我有大约 10 个这样的配置：

<volume user="*" fstype="cifs" server="ou.domain.com" path="data/users/%(USER)/documents" mountpoint="~/Documents" options="uid=%(USER),gid=100,dir_mode=0700,file_mode=0700,nounix,iocharset=utf8,rw,sec=ntlmsspi" />

在/etc/pam.d/common-auth：

auth    [success=2 default=ignore]      pam_unix.so nullok_secure
auth    [success=1 default=ignore]      pam_winbind.so krb5_auth krb5_ccache_type=FILE cached_login try_first_pass
auth    requisite           pam_deny.so
auth    required            pam_permit.so
auth    optional            pam_mount.so disable_interactive

在/etc/pam.d/common-session：

session [default=1]         pam_permit.so
session requisite           pam_deny.so
session required            pam_permit.so
session optional            pam_umask.so
session required            pam_unix.so 
session optional            pam_winbind.so 
session optional            pam_mount.so disable_interactive
session optional            pam_systemd.so 

在/etc/hosts：

127.0.0.1   localhost
127.0.1.1   COMPUTER_FQDN   COMPUTER_HOSTNAME

在/etc/krb5.conf：

[libdefaults]
default_realm = OU.DOMAIN.COM
ticket_lifetime = 24000
default_tgs_enctypes = rc4-hmac des-cbc-md5
default_tkt_enctypes = rc4-hmac des-cbc-md5
permitted_enctypes = rc4-hmac des-cbc-md5
dns_lookup_realm = true
dns_lookup_kdc = true
dns_fallback = yes
krb4_config = /etc/krb.conf
krb4_realms = /etc/krb.realms
kdc_timesync = 1
ccache_type = 4
forwardable = true
proxiable = true

[realms]
OU.DOMAIN.COM = {
    kdc = ou.domain.com:88
    default_domain = ou.domain.com
}

[domain_realm]
.ou.domain.com = OU.DOMAIN.COM
ou.domain.com = OU.DOMAIN.COM

[login]
krb4_convert = true
krb4_get_tickets = false

在/etc/nsswitch.conf：

passwd:         compat winbind
group:          compat winbind
shadow:         compat
gshadow:        files
hosts:          files dns wins
networks:       files
protocols:      db files
services:       db files
ethers:         db files
rpc:            db files
netgroup:   nis

在/etc/security/pam_winbind.conf：

cached_login = yes

最后，在/etc/samba/smb.conf：

[global]
netbios name                    = COMPUTER_HOSTNAME
security                        = ADS
workgroup                       = OU
realm                           = OU.DOMAIN.COM
encrypt passwords               = yes
idmap config *:backend          = rid
idmap config *:range            = 5000-100000
dedicated keytab file           = /etc/krb5.keytab
kerberos method                 = secrets and keytab
winbind refresh tickets         = yes
winbind trusted domains only    = no
winbind use default domain      = yes
winbind enum users              = yes
winbind enum groups             = yes
winbind offline logon           = yes
client ntlmv2 auth              = yes
client ldap sasl wrapping       = sign
template shell                  = /bin/bash
wins server                     = 192.168.0.70
name resolve order              = lmhosts host wins bcast

工作站有 Ubuntu 16.04。当我启动计算机并登录（或稍后登录su到另一个域用户）时，这种情况非常随机地发生，但我还没有找到重现它的方法。有时它就像一个魅力。工作站通过以太网连接到 LAN，DC 位于同一个 LAN（连接良好）。我没有想法，任何帮助或建议将不胜感激:)