3 A script for cloning systems using rsync.
4 Copyright (c)2008-2016 Alexander Barton <alex@barton.de>
11 Backup all or individual systems.
13 Usage: `backup-script [<options>] [<system> [<system> [...]]]`
17 - `-n`, `--dry-run`: Test run only, don't copy any data.
18 - `-p`, `--progress`: Show progress, see rsync(1).
19 - `-t TAG`, `--tag TAG`: Only run jobs with tag TAG (see "tags" variable below).
21 When no *system* is given, all defined systems are backed up.
23 ### backup-script-wrapper
25 Backup all systems and mail the report to "root".
27 Usage: `backup-script-wrapper [<backup-script-options-and-systems ...>]`
31 Show information about backups.
33 Usage: `backup-status [-q] [<system> [<system> [...]]]`
37 - `-q`: *quick mode*, don't calculate backup sizes.
41 Show "relevant" differences in system configuration between backup generations.
43 Usage: `backup-audit [-q] [-v] [<system> [<system> [...]]]`
47 - `-q`: *quiet mode*, don't show systems without "relevant" changes.
48 - `-v`: *verbose mode*, show all checks that are run.
53 All default configuration variables are read from the first file found of this
54 list: `/usr/local/etc/backup-scrupt.conf`, `/etc/backup-script.conf` or
55 from `/etc/backup-script.d/backup-script.conf` (deprecated).
57 All systems which should be backed-up are configured using individual files
58 in the configuration directory, which is `/usr/local/etc/backup-script.d/` or
59 `/etc/backup-script.d/` by default (whichever is found first), and can be
60 specified using the `conf_d` variable in the main configuration file.
62 The must be one file for each system to backup (files ending in `*.sh` are
63 skipped, as well as files named `backup-script.conf`). Please avoid spaces and
64 other "special" characters! The filename is used as hostname for the system by
65 default, but this can be overwritten using the `system` configuration variable.
67 Variables in `backup-script.conf` must be prefixed with `default_` to define
68 default values for all systems.
70 All defaults can be overwritten in the individual system configuration files.
74 - `/etc/backups-script.conf`: defaults for all hosts
75 - `/etc/backups-script.d/host01.example.net`: configuration for host 1
76 - `/etc/backups-script.d/clientXY.example.com`: configuration for host 2
79 ## Configuration Variables
83 System host name. Default: file name.
85 *Note:* There is no `default_system` variable!
87 ### [default_]backup_type
89 Backup type to use. Default: `rsync`.
91 - `rsync`: system backup using rsync(1).
92 Use `source_root` to specify the root directory to save.
94 - `scp`: file backup using scp(1).
95 Use `files` to specify the files to copy.
97 - `disabled`: job is disabled and will not be run. This becomes accounted as
98 "success" in the summary and exit code of the backup script.
100 Please note that neither `ssh_args_add`, `rsync_args_add`, `compress`, nor any
101 "exclude" parameters are supported when using the "scp" backup type! And There
102 "scp" backup type never _deletes_ files from the backup store; so if you reduce
103 the list of files to backup, old files will still be kept, because they were
104 already saved in an older generation (but no longer updated).
108 Remote user. Default: `root`.
110 ### [default_]source_root
112 Remote *root* directory, must end with a slash ("/") character! Default: "/".
114 When saving the whole (remote) system ("/"), default excludes are set up
115 automatically, which exclude standard system directories like /sys and /proc.
119 Space separated list of files to copy when using the "scp" `backup_type`.
120 Default: "running-config".
124 Local backup directory. The backup of each system is stored in a folder named
125 like the system (see `system` variable) inside of this target directory.
127 *Note:* There is *no* default, you have to specify this variable, for example as
128 `default_target` in the `backups-script.conf` file!
130 ### [default_]ssh_args_add
132 Additional parameters for `ssh`. Default: none.
134 ### [default_]rsync_args_add
136 Additional parameters for `rsync`. Default: none.
138 ### [default_]exclude_args_add
140 Additional (exclude) parameters for `rsync`. Default: none.
142 *Deprecated! Use "exclude_dirs_add" instead!*
144 ### [default_]exclude_dirs_add
146 Additional directory path names to exclude from the backup. Use full path names
147 separated by spaces. Default: none.
149 ### [default_]compress
151 Enable (1) or disable (0) rsync transfer compression. Default: 1 (on).
155 Enable (1) or disable (0) ping'ing the target system to make sure that it is
156 reachable before calling `rsync`. Default: 1 (on).
160 Enable (1) or disable (0) *local mode*: when local mode is in effect, `rsync` is
161 called without using `ssh`, which is a good idea when saving the local system.
162 Default: 0 (off; use ssh).
164 ### [default_]generations
166 Number of generations to keep. Default: 0 (none).
168 On a suitable target file systems (see `target` variable), this script can
169 generate generations using snapshots: the script creates a new snapshot
170 named with the time stamp for each generation inside of the system directory
171 inside of the target directory.
173 Supported file systems are:
176 All generations are btrfs subvolumes and named after the date and time.
178 All generations are ZFS file systems. Latest generation is named `current`,
179 elders are links to the ZFS snapshot directories.
181 The latest snapshot is always reachable using a symlink named `latest`
182 inside the system directory.
184 ### [default_]io_timeout
186 The maximum I/O timeout in seconds. If no data is transferred for the specified
187 time then rsync will abort. Default: 1800 (30 minutes).
191 Comma-separated list of tags of this job. All uppercase tag names are reserved
192 and become set automatically on runtime:
194 - NONE: Jobs with no other tags at all.
195 - ALL: Matches all jobs, regardless of their tags (see `-t`/`--tags` option).
196 - LOCAL: All jobs running on "localhost".
200 ### [default_]job_pre_exec
202 Optional script to execute before `rsync` starts. Default: none.
204 When the `job_pre_exec` script returns an error (exit code is not 0), the backup
207 ### [default_]job_post_exec
209 Optional script to execute after `rsync` exited. Default: none.
211 ### Compatibility Variables
213 The following configurations variables used by the backup-pull(1) script in job
214 definition files are automatically mapped to the new backup-script variables:
217 * source -> source_root
218 * pre_exec -> job_pre_exec
219 * post_exec -> job_post_exec
224 - 1: Unspecific Error!
225 - 2: Usage information has been shown.
226 - 3: Can't read system definition
227 - 4: PID-file exists!
228 - 5: Pre-exec command failed!
229 - 6: There have been systems with errors!
230 - 7: Not all jobs were run!
231 - 9: Aborted (CTRL-C)!