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NickSoft
Asked: 2016-07-18 16:42:35 +0800 CST

CentOS 6 上的 Dovecot 更新后无法使用

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我最近将 CentOS 更新到 6.8 版（最终版）。我不确定dovecot是否停止工作或稍后停止工作。我在正确的密码登录和错误密码的“失败”登录中什么也看不到。我从来没有碰过 /etc/pam.d - 应该是操作系统的默认值。它以前工作过。我不知道为什么它现在不起作用。secure

我正在使用 dovecot + sendmail。Sendmail 正在通过 sasl->PAM 进行身份验证，并且工作正常。

我试过 passdbshadow看看有什么问题，但没有成功。

这可能是巧合，但由于某种原因，强制执行 md 检查（在所有分区上使用 raid 1）

更新： raid 检查完成后 dmesg 显示了这一点。

auth[14058]: segfault at 9c ip 000000000040f8e0 sp 00007ffe99788070 error 4 in auth[400000+37000]
auth[14133]: segfault at 8c ip 000000000040f8e0 sp 00007ffc7ec2ee60 error 4 in auth[400000+37000]

在 dmesg 充满这些消息之前：“延迟 md4 的数据检查直到 md3 完成”，所以我看不到段错误......

配置：

# dovecot -n
# 2.0.9: /etc/dovecot/dovecot.conf
# OS: Linux 2.6.32-642.1.1.el6.centos.plus.x86_64 x86_64 CentOS release 6.8 (Final)
auth_debug = yes
auth_gssapi_hostname = $ALL
auth_verbose = yes
log_path = /var/log/dovecot.log
mail_debug = yes
mail_location = mbox:~/mail:INBOX=/var/spool/mail/%u
mbox_write_locks = fcntl
passdb {
  args = failure_show_msg=yes dovecot
  driver = pam
}
passdb {
  driver = shadow
}
protocols = imap pop3
service auth-worker {
  user = root
}
service auth {
  user = root
}
ssl_cert = </etc/pki/dovecot/certs/dovecot.pem
ssl_key = </etc/pki/dovecot/private/dovecot.pem
userdb {
  driver = passwd
}
verbose_proctitle = yes

鸽舍日志：

Jul 18 02:18:12 auth: Debug: Loading modules from directory: /usr/lib64/dovecot/auth
Jul 18 02:18:12 auth: Debug: Module loaded: /usr/lib64/dovecot/auth/libauthdb_ldap.so
Jul 18 02:18:12 auth: Debug: Module loaded: /usr/lib64/dovecot/auth/libdriver_sqlite.so
Jul 18 02:18:12 auth: Debug: Module loaded: /usr/lib64/dovecot/auth/libmech_gssapi.so
Jul 18 02:18:12 auth: Debug: auth client connected (pid=24897)
Jul 18 02:18:16 auth: Debug: client in: AUTH    1       PLAIN   service=imap    secured lip=5.9.143.206 rip=176.12.6.242        lport=143       rport=64099
Jul 18 02:18:16 auth: Debug: client out: CONT   1
Jul 18 02:18:16 auth: Debug: client in: CONT<hidden>
Jul 18 02:18:16 auth: Debug: Loading modules from directory: /usr/lib64/dovecot/auth
Jul 18 02:18:16 auth: Debug: Module loaded: /usr/lib64/dovecot/auth/libauthdb_ldap.so
Jul 18 02:18:16 auth: Debug: Module loaded: /usr/lib64/dovecot/auth/libdriver_sqlite.so
Jul 18 02:18:16 auth: Debug: Module loaded: /usr/lib64/dovecot/auth/libmech_gssapi.so
Jul 18 02:18:16 auth: Debug: pam(npelov,176.12.6.242): lookup service=dovecot
Jul 18 02:18:16 auth: Debug: pam(npelov,176.12.6.242): #1/1 style=1 msg=Password:
Jul 18 02:18:19 auth: Info: pam(npelov,176.12.6.242): pam_authenticate() failed: Authentication failure (password mismatch?)
Jul 18 02:18:19 master: Error: service(auth): child 24898 killed with signal 11 (core dumps disabled)
Jul 18 02:18:19 auth: Debug: Loading modules from directory: /usr/lib64/dovecot/auth
Jul 18 02:18:19 auth: Debug: Module loaded: /usr/lib64/dovecot/auth/libauthdb_ldap.so
Jul 18 02:18:19 auth: Debug: Module loaded: /usr/lib64/dovecot/auth/libdriver_sqlite.so
Jul 18 02:18:19 auth: Debug: Module loaded: /usr/lib64/dovecot/auth/libmech_gssapi.so
Jul 18 02:18:19 auth: Debug: auth client connected (pid=24897)
Jul 18 02:18:19 auth: Debug: client in: AUTH    2       PLAIN   service=imap    secured lip=5.9.143.206 rip=176.12.6.242        lport=143       rport=64099     resp=<hidden>
Jul 18 02:18:19 auth: Debug: Loading modules from directory: /usr/lib64/dovecot/auth
Jul 18 02:18:19 auth: Debug: Module loaded: /usr/lib64/dovecot/auth/libauthdb_ldap.so
Jul 18 02:18:19 auth: Debug: Module loaded: /usr/lib64/dovecot/auth/libdriver_sqlite.so
Jul 18 02:18:19 auth: Debug: Module loaded: /usr/lib64/dovecot/auth/libmech_gssapi.so
Jul 18 02:18:19 auth: Debug: pam(npelov,176.12.6.242): lookup service=dovecot
Jul 18 02:18:19 auth: Debug: pam(npelov,176.12.6.242): #1/1 style=1 msg=Password:
Jul 18 02:18:20 auth: Info: pam(npelov,176.12.6.242): pam_authenticate() failed: Authentication failure (password mismatch?)
Jul 18 02:18:20 master: Error: service(auth): child 25050 killed with signal 11 (core dumps disabled)
Jul 18 02:18:24 auth: Debug: Loading modules from directory: /usr/lib64/dovecot/auth
Jul 18 02:18:24 auth: Debug: Module loaded: /usr/lib64/dovecot/auth/libauthdb_ldap.so
Jul 18 02:18:24 auth: Debug: Module loaded: /usr/lib64/dovecot/auth/libdriver_sqlite.so
Jul 18 02:18:24 auth: Debug: Module loaded: /usr/lib64/dovecot/auth/libmech_gssapi.so
Jul 18 02:18:24 auth: Debug: auth client connected (pid=24897)

手动测试：

# openssl s_client -connect <host>:993
CONNECTED(00000003)
..............................................
..............................................
..............................................
a1 LOGIN npelov validpassword
a1 NO [UNAVAILABLE] Temporary authentication failure.
* OK Waiting for authentication process to respond..
linux centos sendmail dovecot

2 个回答

  1. Best Answer

    听起来您遇到了某种软磁盘故障，该故障触发了磁盘的检查/重建，并且该故障损坏了 dovecot 安装的一部分。

    我也会：

    • 如果可能，请检查磁盘的 SMART 性能/运行状况计数器，可能即将发生灾难性硬件故障
    • rpm -Va使用;验证其他包的文件 任何大小不正确或校验和错误的二进制文件也可能已损坏
    • 1

  2. 重新安装 dovecot 数据包解决了问题：

    # yum reinstall dovecot
# service dovecot restart

    更新： smart 不报告任何错误。

    • 0

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