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Accepted
yakatz
Asked: 2018-06-08 19:39:43 +0800 CST

amgtar 和 GNUTAR 之间的区别

  • 772

我们有数百个系统使用 AMANDA 备份到磁带库。每天我们都会收到一封电子邮件，其中包含一长串奇怪的备份结果。几乎所有这些都是因为正在写入日志文件或正在 Web 服务器上更新基于文件的缓存。例如（5 台机器显示各种 STRANGE 消息）：

STRANGE DUMP DETAILS:
  /-- av1 / lev 2 STRANGE
  sendbackup: start [avion:/ level 2]
  sendbackup: info BACKUP=/bin/tar
  sendbackup: info RECOVER_CMD=/bin/tar -xpGf - ...
  sendbackup: info end
  ? /bin/tar: ./boot: directory is on a different filesystem; not dumped
  ? /bin/tar: ./dev: directory is on a different filesystem; not dumped
  ? /bin/tar: ./fs: directory is on a different filesystem; not dumped
  ? /bin/tar: ./proc: directory is on a different filesystem; not dumped
  ? /bin/tar: ./run: directory is on a different filesystem; not dumped
  ? /bin/tar: ./sys: directory is on a different filesystem; not dumped
  ? /bin/tar: ./wwwusers: directory is on a different filesystem; not dumped
  | /bin/tar: ./tmp/.X11-unix/X0: socket ignored
  | /bin/tar: ./tmp/gpg-v9zbWU/S.gpg-agent: socket ignored
  | Total bytes written: 795084800 (759MiB, 740KiB/s)
  sendbackup: size 776450
  sendbackup: end
  \--------
  /-- gitlab / lev 3 STRANGE
  sendbackup: start [gitlab:/ level 3]
  sendbackup: info BACKUP=/bin/tar
  sendbackup: info RECOVER_CMD=/bin/tar -xpGf - ...
  sendbackup: info end
  | /bin/tar: ./tmp/gitaly-ruby215330643/socket.0: socket ignored
  | /bin/tar: ./tmp/gitaly-ruby215330643/socket.1: socket ignored
  | /bin/tar: ./var/lib/gssproxy/default.sock: socket ignored
  ? /bin/tar: ./var/log/gitlab/gitlab-workhorse/current: file changed as we read it
  ? /bin/tar: ./var/log/gitlab/nginx/gitlab_access.log: file changed as we read it
  | /bin/tar: ./var/opt/gitlab/gitaly/gitaly.socket: socket ignored
  | /bin/tar: ./var/opt/gitlab/gitlab-rails/sockets/gitlab.socket: socket ignored
  | /bin/tar: ./var/opt/gitlab/gitlab-workhorse/socket: socket ignored
  | /bin/tar: ./var/opt/gitlab/postgresql/.s.PGSQL.5432: socket ignored
  | /bin/tar: ./var/opt/gitlab/redis/redis.socket: socket ignored
  | /bin/tar: ./var/spool/postfix/private/anvil: socket ignored
  | /bin/tar: ./var/spool/postfix/private/bounce: socket ignored
  | /bin/tar: ./var/spool/postfix/private/defer: socket ignored
  | /bin/tar: ./var/spool/postfix/private/discard: socket ignored
  | /bin/tar: ./var/spool/postfix/private/error: socket ignored
  | /bin/tar: ./var/spool/postfix/private/lmtp: socket ignored
  Look in the '/var/log/amanda/log.error/gitlab._.3.20180606231049.errout' file for full error messages
  \--------
  /-- haproxy00-127 / lev 3 STRANGE
  sendbackup: start [haproxy00-127:/ level 3]
  sendbackup: info BACKUP=/bin/tar
  sendbackup: info RECOVER_CMD=/bin/tar -xpGf - ...
  sendbackup: info end
  ? /bin/tar: ./var/log/messages: file changed as we read it
  Look in the '/var/log/amanda/log.error/haproxy00-127._.3.20180607003248.errout' file for full error messages
  \--------
  /-- imap00 /srv/dovecot lev 0 STRANGE
  sendbackup: start [imap00:/srv/dovecot level 0]
  sendbackup: info BACKUP=/bin/tar
  sendbackup: info RECOVER_CMD=/bin/tar -xpGf - ...
  sendbackup: info end
  ? /bin/tar: ./a1/Maildir/new/1528332018.M.imap00.example.com,S=6309,W=6430: File removed before we read it
  ? /bin/tar: ./a1/Maildir/new/1528335571.M.imap00.example.com,S=8299,W=8451: File removed before we read it
  ? /bin/tar: ./a2/Maildir/cur/1528306776.M.imap00.example.com,S=13517,W=13770\:2,Scd: File removed before we read it
  ? /bin/tar: ./a2/Maildir/cur/1528332257.M.imap00.example.com,S=22257,W=22562\:2,STcd: File removed before we read it
  ? /bin/tar: ./a3/Maildir/cur/1528287062.M.imap00.example.com,S=10343,W=10558\:2,: File removed before we read it
  ? /bin/tar: ./a3/Maildir/cur/1528297383.M.imap00.example.com,S=4179,W=4265\:2,: File removed before we read it
  ? /bin/tar: ./a3/Maildir/cur/1528312816.M.imap00.example.com,S=29364,W=29796\:2,: File removed before we read it
  ? /bin/tar: ./a3/Maildir/new/1528327304.M.imap00.example.com,S=52059,W=53029: File removed before we read it
  ? /bin/tar: ./a4/Maildir/.folder/dovecot.index.log.2: File removed before we read it
  ? /bin/tar: ./a4/Maildir/.Personal/dovecot.index.log.2: File removed before we read it
  ? /bin/tar: ./a4/Maildir/.Trash/cur/1527783480.M.imap00.example.com,S=31976,W=32433\:2,Sab: File removed before we read it
  ? /bin/tar: ./a4/Maildir/cur/1528336066.M.imap00.example.com,S=122100,W=124740\:2,ab: File removed before we read it
  ? /bin/tar: ./a4/Maildir/cur/1528337059.M.imap00.example.com,S=28553,W=28964\:2,ab: File removed before we read it
  Look in the '/var/log/amanda/log.error/imap00._srv_dovecot.0.20180606220538.errout' file for full error messages
  \--------
  /-- webserver1 / lev 2 STRANGE
  sendbackup: start [webserver1:/ level 2]
  sendbackup: info BACKUP=/bin/tar
  sendbackup: info RECOVER_CMD=/bin/tar -xpGf - ...
  sendbackup: info end
  ? /bin/tar: ./var/log/httpd/kemp_access_log: file changed as we read it
  ? /bin/tar: ./var/log/httpd/wiki.example.com_access_ssl.log: file changed as we read it
  ? /bin/tar: ./var/log/httpd/www.example.com_access.log: file changed as we read it
  ? /bin/tar: ./var/log/httpd/www.example.com_ssl_access_ssl.log: file changed as we read it
  Look in the '/var/log/amanda/log.error/webserver1._.2.20180607004437.errout' file for full error messages
  \--------

(brought to you by Amanda version 3.3.3)

我们当前配置的相关部分：

define dumptype nocomp-root-tar {
    program "GNUTAR"
    comment "Root partitions with gtar"
    compress none
    estimate server
    priority low
    exclude list "/etc/amanda/amanda.exclude.list"
    auth "bsd"
}
define dumptype nocomp-user-tar {
    program "GNUTAR"
    comment "Non-root partitions with gtar"
    compress none
    estimate server
    priority medium
    exclude list "/etc/amanda/amanda.exclude.list"
    auth "bsd"
}

我们不想仅仅因为这些文件可能会更改或消失而从备份中排除这些文件。我们也不能在备份运行时禁用 IMAP 服务器。看起来我可以更改我们的系统以amgtar用作他们的备份方法，这将使我们消除所有这些消息。

define application-tool app_amgtar {
    plugin "amgtar"

    property        "NORMAL" ": socket ignored$"
    property append "NORMAL" "file changed as we read it$"
    property append "NORMAL" ": directory is on a different filesystem; not dumped$"
    property append "NORMAL" ": File removed before we read it$"

}
define dumptype nocomp-root-amgtar {
    program "APPLICATION"
    application "app_amgtar"
    comment "Root partitions with amgtar"
    compress none
    estimate server
    priority low
    exclude list "/etc/amanda/amanda.exclude.list"
    auth "bsd"
}
...

有什么缺点amgtar吗？

如果我们进行此更改，恢复旧备份会更困难吗？

文档似乎说只GNUTAR支持exclude list. 是否amgtar也支持它，因为它GNUTAR在下面使用？

amanda

1 个回答

  1. Best Answer

    我们进行了更改，没有遇到任何问题。不幸的是，没有更多关于它的信息......

    • 0

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