subversion锁定解除、升级、备份与恢复

发布于 2022-07-07 15:46:13 字数 14656 浏览 19 评论 2

###############################################
#
#DocName:subversion锁定解除、升级、备份与恢复
#Author:nightcat
#Time:2005-5-23
#EMail:liwenfei@21cn.com
#WebSite:nightcat.512j.com
#
###############################################

1.发生琐定，解除步骤：
  A.确定没有存取.关闭httpd服务器.
  B.成为管理员身份
  C.执行svnadmin recover /path/to/repo命令
  D.重启动subversion.

//注意：
  A.以管理员身份，非root身份，如果一root身份，要重新chmod,库的权限.

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2.升级的步骤：
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  A.现有版本svnadmin ,将档案库dump出来
  B.升级到新版的subversion
  C.删除就档案库,再原处以新版本subversion,建立新的空档案库.
  D.再利用新版本svnadmin ,将档案库load到刚刚建立好的档案库.

  实例：
  //导出
  $svnlook youngest oldrepo
  $svnadmin dump oldrepo >; dumpfile
  //还原
  $svnadmin load newrepo < dumpfile

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3.即时备份目录
/////////////////////////////////////////////////////////////////////////
$svnadmin hotcopy /path/to/repo /backup/repo

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4.渐进式备份实现.
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A.建立文件hot-backup.perl.内容如下：
#!/usr/bin/perl -w
use strict;

my $repos_path = '/path/to/repos';
my $dumpfile = '/usr/backup/svn-dumpfile';
my $last_dumped = '/var/log/svn-last-dumped';
my $svnlook = '/usr/local/subversion/bin/svnlook';
my $svnadmin = '/usr/local/subversion/bin/svnadmin';

# Figure out the starting revision. Use 0 if we cannot read the
# last-dumped file, else use the revision in that file incremented
# by 1.
my $new_start = 0;
if (open LASTDUMPED, $last_dumped)
  {
my $line = <LASTDUMPED>;;
if (defined $line and $line =~ /^(d+)/)
   {
      $new_start = $1 + 1;
   }
close LASTDUMPED;
  }

# Query the youngest revision in the repos.
my $youngest = `$svnlook youngest $repos_path`;
defined $youngest && $youngest =~ /^d+$/
or die "$0: 'svnlook youngest $repos_path' cannot get youngest revision.n";
chomp $youngest;

# Do the backup.
system("$svnadmin dump $repos_path --revision $new_startyoungest --incremental >;>; $dumpfile.tmp" == 0
or die "$0: svnadmin dump to '$dumpfile.tmp' failed.n";

# Store a new last-dumped revision.
open LASTDUMPED, ">; $last_dumped.tmp"
or die "$0: cannot open '$last_dumped.tmp' for writing: $!n";
print LASTDUMPED "$youngestn";
close LASTDUMPED
or die "$0: error in closing '$last_dumped.tmp' for writing: $!n";

# Rename to final locations.
rename("$dumpfile.tmp", $dumpfile)
or die "$0: cannot rename '$dumpfile.tmp' to '$dumpfile': $!n";
rename("$last_dumped.tmp", $last_dumped)
or die "$0: cannot rename '$last_dumped.tmp' to '$last_dumped': $!n";
# All done!

B.备份.先编辑hot-backup.perl里面正确的路径名.
#vi hot-backup.perl修改为自己的路径：
my $repos_path = '/path/to/repos';
my $dumpfile = '/usr/backup/svn-dumpfile';
my $last_dumped = '/var/log/svn-last-dumped';
my $svnlook = '/usr/local/subversion/bin/svnlook';
my $svnadmin = '/usr/local/subversion/bin/svnadmin';
#perl hot-backup.perl得到的文件是/usr/backup/svn-dumpfile

c.还原
  1.建立新的仓库
  #svnadmin create /usr/local/repo/newrepo

  2.还原信息
  #svnadmin load /usr/local/repo/newrepo < /usr/backup/svn-dumpfile

  3.注意：以后每天都备份.再执行还原即可,不必新建仓库了.

  4.为了每段时间能验证备份的有效性.最好是建立一个验证仓库，用来还原，看信息是否正常。

d.有提交，就备份.进入仓库
#mv /hooks/post-commit.tmpl /hooks/post-commit
#vi /hooks/post-commit
添加内容在后面
perl /usr/local/subversion/backup/hot-backup.perl
每次提交触发一次备份

E.修改一下上面的程序，让能接受参数输入
#!/usr/bin/perl -w
use strict;

my $repos_path = $ARGV[0];
my $dumpfile = $ARGV[1];
my $last_dumped = $ARGV[2];

my $svnlook = '/usr/local/subversion/bin/svnlook';
my $svnadmin = '/usr/local/subversion/bin/svnadmin';

#for usage
if(@ARGV != 3 )
{
print "$0:[/path/to/repo] [/backup/dumpfile] [/var/log/lastdump]n";
exit 1 ;
}

# Do the backup.
system("$svnadmin dump $repos_path --revision $new_startyoungest --incremental >;>; $dumpfile.tmp" == 0
or die "$0: svnadmin dump to '$dumpfile.tmp' failed.n";

F.有提交，就备份.进入仓库
#mv /hooks/post-commit.tmpl /hooks/post-commit
#vi /hooks/post-commit
添加内容在后面
perl /usr/local/subversion/backup/hot-backup.pl /usr/local/repo/webaddress /usr/local/subversion/backup/webaddress /var/log/webaddress
每次提交触发一次备份

//////////////////////////////////////////////////////////////////////
5.hot-backup.py完整备份
/////////////////////////////////////////////////////////////////////

//////////////////////////////////////////////////////////////////////
6.tar包完整备份
/////////////////////////////////////////////////////////////////////
  1.进入仓库的根目录/usrl/local/
  #cd /usr/local/
  2.备份整个目录.
  #tar -cf repo.tar  /usr/local/repo.

  3.还原时候来到根目录/usrl/local/
  #tar -xvf repo.tar

  4.也可以备份单个目录.
  #tar -cf svn.tar  /usr/local/repo/svn.

  5.还原单个目录到目录/usr/local/repo/
  #tar -xvf svn.tar

  6.每天的自动备份脚本backup.sh.放于/usrl/local/subversion/backup目录下
#!/bin/sh
USAGE="Usage:`basename $0` [-f|-d] [files|directories]"
if [ $# -lt 2 ] ; then
   echo "$USAGE";
   exit 1 ;
fi
case "$1" in
      -f) shift
         TARGES="-tvf" ;
         for i in "$@" ;
         do
            if [ -f "$i" ] ; then
               FILES = `tar $TAGES "$i" 2 >; /dev/null`
               if [ $? -eq 0 ] ; then
                  echo ; echo "$i" ; echo "$FILES"
               else
                  echo "ERRORi not a tar file."
               fi
            else
               echo "ERRORi not a file.";
            fi
            done
            ;;
      -d) shift
            TARGES="-cvf" ;
            if [ -f backup.tar ] ; then
            mv backup.tar backup1.tar
            fi
            tar $TARGES backup.tar "$@"
            ;;
         *) echo "$USAGE"
            exit 0
            ;;
esac
exit $?

8.固定时间运行脚本
   A.建立运行脚本backup：
      20 18 * * *  /usr/local/subversion/backup/backup.sh -d /usr/local/repo
   B.启用脚本
   #crontab backup
   #crontab -l 查看运行的脚本
20 18 * * *  /usr/local/subversion/backup/backup.sh -d /usr/local/repo //每日18:20，下班后20分钟

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注意：
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1.linux直接cp的备份仓库能在nt下使用,但是nt的复制不能在linux下使用.

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