Some documentation polishment
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Nico Schottelius
Nico Schottelius
parent
decae37d8d
commit
68c83cf50b
2 changed files with 35 additions and 18 deletions
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@ -287,8 +287,8 @@ your farm of webservers <strong>to</strong> a backup host somewhere else. One of
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your webservers gets compromised, then your backup server will be compromised,
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too. Think of it the other way round: The backup server (now behind a
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firewall using NAT and strong firewall rules) connects to the
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webservers and pulls the data to it. If someone gets access to the
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webserver, the person will perhaps not even see your machine. If
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webservers and pulls the data <strong>from</strong> them. If someone gets access to one
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of the webservers, the person will perhaps not even see your machine. If
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he/she sees that there are connections from a host to the compromised
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machine, he/she will not be able to login to the backup machine.
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All other backups are still secure.</p>
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@ -392,7 +392,7 @@ This number defines how many versions of this intervall to keep.</p>
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<em>/etc/ccollect/defaults/<tt>pre_exec</tt></em> (same with <tt>post_exec</tt>), <tt>ccollect</tt>
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will start <tt>pre_exec</tt> before the whole backup process and
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<tt>post_exec</tt> after backup of all sources is done.</p>
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<p>The following Example describes how to report free disk space in
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<p>The following example describes how to report free disk space in
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human readable format before and after the whole backup process:</p>
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<div class="listingblock">
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<div class="content">
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@ -555,6 +555,9 @@ seperated.</p>
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<pre><tt> [11:36] zaphodbeeblebrox:ccollect-0.2% ls -l conf/sources/testsource2/destination
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lrwxrwxrwx 1 nico users 20 2005-11-17 16:44 conf/sources/testsource2/destination -> /home/nico/backupdir</tt></pre>
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</div></div>
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<p>To speak truth, this is not fully correct. <tt>ccollect</tt> will also backup
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your data, if <tt>destination</tt> is a directory. But do you really want to have
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a backup below /etc?</p>
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<h4>4.3.7. Detailled description of "intervalls/"</h4>
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<p>When you create a subdirectory <tt>intervalls/</tt> within your source configuration
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directory, you can specify individiual intervalls for this specific source.
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@ -828,13 +831,13 @@ du (GNU coreutils) 5.93
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1.5G hydrogenium/durcheinander.2006-01-25-23:18.31328
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200M hydrogenium/durcheinander.2006-01-26-00:11.3332</tt></pre>
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</div></div>
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<p>In the second report the sizes include the space the inodes of
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<p>In the second report (without -l) the sizes include the space the inodes of
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the hardlinks allocate.</p>
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</div>
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<div id="footer">
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<div id="footer-text">
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Version 0.3.1<br />
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Last updated 05-Feb-2006 18:56:42 CEST
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Last updated 06-Feb-2006 00:46:09 CEST
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</div>
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</div>
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</body>
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@ -26,8 +26,8 @@ your farm of webservers *to* a backup host somewhere else. One of
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your webservers gets compromised, then your backup server will be compromised,
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too. Think of it the other way round: The backup server (now behind a
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firewall using NAT and strong firewall rules) connects to the
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webservers and pulls the data *from* them. If someone gets access to the
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webserver, the person will perhaps not even see your machine. If
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webservers and pulls the data *from* them. If someone gets access to one
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of the webservers, the person will perhaps not even see your machine. If
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he/she sees that there are connections from a host to the compromised
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machine, he/she will not be able to login to the backup machine.
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All other backups are still secure.
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@ -38,7 +38,6 @@ Requirements
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Installing ccollect
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~~~~~~~~~~~~~~~~~~~
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For the installation, you need at least
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- either `cp` and `chmod` or `install`
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@ -115,15 +114,15 @@ Example:
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--------------------------------------------------------------------------------
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This means to keep 28 daily backups, 12 monthly backups and 4 weekly.
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General pre- and post-execution
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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If you add '$CCOLLECT_CONF/defaults/`pre_exec`' or
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'/etc/ccollect/defaults/`pre_exec`' (same with `post_exec`), `ccollect`
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will start `pre_exec` before the whole backup process and
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`post_exec` after backup of all sources is done.
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The following Example describes how to report free disk space in
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The following example describes how to report free disk space in
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human readable format before and after the whole backup process:
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-------------------------------------------------------------------------
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[13:00] hydrogenium:~# mkdir -p /etc/ccollect/defaults/
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@ -134,6 +133,7 @@ human readable format before and after the whole backup process:
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[13:01] hydrogenium:~# ln -s /etc/ccollect/defaults/pre_exec /etc/ccollect/defaults/post_exec
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-------------------------------------------------------------------------
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Source configuration
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~~~~~~~~~~~~~~~~~~~~
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Each source configuration exists below '$CCOLLECT_CONF/sources/$name' or
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@ -158,6 +158,7 @@ Additionally a source may have the following files:
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- `pre_exec` program to execute before backuping this source
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- `post_exec` program to execute after backuping this source
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Example:
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--------------------------------------------------------------------------------
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[10:47] zaphodbeeblebrox:ccollect-0.2% ls -l conf/sources/testsource2
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@ -179,6 +180,7 @@ Example:
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/home/nico/vpn
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--------------------------------------------------------------------------------
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Detailled description of "source"
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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`source` describes a `rsync` compatible source (one line only).
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@ -187,17 +189,20 @@ For instance 'backup_user@foreign_host:/home/server/video'.
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To use the `rsync` protocol without the `ssh`-tunnel, use
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'rsync::USER@HOST/SRC'. For more information have a look at `rsync`(1).
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Detailled description of "verbose"
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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`verbose` tells `ccollect` that the log should contain verbose messages.
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If this file exists in the source specification *-v* will be passed to `rsync`.
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Example:
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--------------------------------------------------------------------------------
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[11:35] zaphodbeeblebrox:ccollect-0.2% touch conf/sources/testsource1/verbose
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--------------------------------------------------------------------------------
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Detailled description of "very_verbose"
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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`very_verbose` tells `ccollect` that it should log very verbose.
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@ -205,11 +210,13 @@ Detailled description of "very_verbose"
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If this file exists in the source specification *-v* will be passed to
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`rsync`, `cp`, `rm` and `mkdir`.
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Example:
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--------------------------------------------------------------------------------
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[23:67] nohost:~% touch conf/sources/testsource1/very_verbose
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--------------------------------------------------------------------------------
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Detailled description of "summary"
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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@ -268,12 +275,17 @@ Detailled description of "destination"
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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`destination` must be a link to the destination directory.
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Example:
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--------------------------------------------------------------------------------
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[11:36] zaphodbeeblebrox:ccollect-0.2% ls -l conf/sources/testsource2/destination
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lrwxrwxrwx 1 nico users 20 2005-11-17 16:44 conf/sources/testsource2/destination -> /home/nico/backupdir
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--------------------------------------------------------------------------------
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To speak truth, this is not fully correct. `ccollect` will also backup
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your data, if `destination` is a directory. But do you really want to have
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a backup below /etc?
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Detailled description of "intervalls/"
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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@ -281,6 +293,7 @@ When you create a subdirectory `intervalls/` within your source configuration
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directory, you can specify individiual intervalls for this specific source.
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Each file below this directory describes an intervall.
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Example:
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--------------------------------------------------------------------------------
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[11:37] zaphodbeeblebrox:ccollect-0.2% ls -l conf/sources/testsource2/intervalls/
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@ -292,30 +305,32 @@ Example:
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20
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--------------------------------------------------------------------------------
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Detailled description of "rsync_options"
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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When you create the file `rsync_options` below your source configuration,
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all the parameters found in this file will be passed to rsync. This
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way you can pass additional options to rsync. For instance you can tell rsync
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to show progress ("--progress") or which -password-file ("--password-file")
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to use for automatic backup over the rsync-protocol.
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Example:
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--------------------------------------------------------------------------------
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[23:42] hydrogenium:ccollect-0.2% cat conf/sources/test_rsync/rsync_options
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--password-file=/home/user/backup/protected_password_file
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--------------------------------------------------------------------------------
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Detailled description of "pre_exec" and "post_exec"
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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When you create `pre_exec` and / or `post_exec` below your source
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configuration, `ccollect` will execute this command before,
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respective after doing the backup for *this specific* source.
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If you want to have pre-/post-exec before and after *all*
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backups, see above for general configuration.
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Example:
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--------------------------------------------------------------------------------
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[13:09] hydrogenium:ccollect-0.3% cat conf/sources/with_exec/pre_exec
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@ -330,12 +345,12 @@ df -h
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df -h
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--------------------------------------------------------------------------------
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Hints
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-----
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Using rsync protocol without ssh
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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When you have a computer with little computing power, it may be useful to use
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rsync without ssh, directly using the rsync protocol
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(specify 'user@host::share' in `source`). You may wish to use
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@ -358,7 +373,6 @@ This hint was reported by Daniel Aubry.
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Not-excluding top-level directories
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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When you exclude "/proc" or "/mnt" from your backup, you may run into
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trouble when you restore your backup. When you use "/proc/\*" or "/mnt/\*"
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instead `ccollect` will backup empty directories.
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@ -374,11 +388,11 @@ This hint was reported by Marcus Wagner.
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Re-using already created rsync-backups
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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If you used `rsync` directly before you use `ccollect`, you can
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use this old backup as initial backup for `ccollect`: You
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simply move it into a subdirectory named "'intervall'.0".
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Example:
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-------------------------------------------------------------------------------
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backup:/home/backup/web1# ls
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@ -424,7 +438,6 @@ F.A.Q.
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What happens, if one backup is broken or empty?
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Let us assume, that one backup failed (connection broke or hard disk had
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some failures). So we've one backup in our history, which is incomplete.
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@ -433,7 +446,6 @@ The next time you use `ccollect`, it will transfer the missing files
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When backing up from localhost the destination is also included. Is this a bug?
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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No. `ccollect` passes your source definition directly to `rsync`. It
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does not try to analyze it. So it actually does not know if a source
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comes from local harddisk or from a remote server. And it does not want
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@ -479,6 +491,7 @@ srwali01:/etc/ccollect/sources/local-root# ccollect.sh taeglich local-root
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|-> 0 backup(s) already exist, keeping 28 backup(s).
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--------------------------------------------------------------------------------
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After that, I added some more sources:
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--------------------------------------------------------------------------------
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srwali01:~# cd /etc/ccollect/sources
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@ -508,6 +521,7 @@ srwali01:/etc/ccollect/sources/srwali03# ln -s /mnt/hdbackup/srwali03 destinatio
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srwali01:/etc/ccollect/sources/srwali03# mkdir /mnt/hdbackup/srwali03
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--------------------------------------------------------------------------------
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Using hard-links requires less disk space
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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@ -569,5 +583,5 @@ du (GNU coreutils) 5.93
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200M hydrogenium/durcheinander.2006-01-26-00:11.3332
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-------------------------------------------------------------------------
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In the second report the sizes include the space the inodes of
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In the second report (without -l) the sizes include the space the inodes of
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the hardlinks allocate.
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