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# Mailcow Backup Using borgbackup <!-- omit in toc --> # Mailcow Backup Using borgbackup <!-- omit in toc -->
This script automates backing up your Mailcow installation using borgbackup This script automates backing up your Mailcow installation using borgbackup and a remote ssh-capable storage system. I suggest using rsync.net since they
and a remote ssh-capable storage system. I suggest using rsync.net since they have great speeds and a special pricing structure for borgbackup/attic users ([details here](https://www.rsync.net/products/attic.html)).
have great speeds and a special pricing structure for borgbackup/attic users
([details here](https://www.rsync.net/products/attic.html)).
This script automates the following tasks: This script automates the following tasks:
- Optionally copies a 503 error page to your webserver so users know when your - Optionally copies a 503 error page to your webserver so users know when your server is unavailable due to backups being performed. The 503 file is removed
server is unavailable due to backups being performed. The 503 file is removed
when the backup is completed so users can login again when the backup is completed so users can login again
- Dumps the Mailcow mySQL database and adds it to the backup - Dumps the Mailcow mySQL database and adds it to the backup
- Handles stopping and re-starting mail-flow containers (postfix and dovecot) so - Handles stopping and re-starting mail-flow containers (postfix and dovecot) so everything is in a consistent state during the backup
everything is in a consistent state during the backup
- Allows you to specify additional files you want backed up - Allows you to specify additional files you want backed up
- Allows you to specify files/directories to exclude from your backups - Allows you to specify files/directories to exclude from your backups
- Runs 'borg prune' to make sure you are trimming old backups on your schedule - Runs 'borg prune' to make sure you are trimming old backups on your schedule
- Creates a clear, easy to parse log file so you can keep an eye on your backups - Creates a clear, easy to parse log file so you can keep an eye on your backups and any errors/warnings
and any errors/warnings
## Contents <!-- omit in toc --> ## Contents <!-- omit in toc -->
- [Installation/copying](#installationcopying) - [quick start](#quick-start)
- [Environment notes](#environment-notes) - [configuration file](#configuration-file)
- [Why this script must be run as root](#why-this-script-must-be-run-as-root) - [running the script](#running-the-script)
- [Script parameters](#script-parameters) - [scheduling your backup via cron](#scheduling-your-backup-via-cron)
- [Optional parameters](#optional-parameters)
- [Docker container STOP timeout before error: -1 _number_](#docker-container-stop-timeout-before-error--1-number)
- [Docker container START timeout before error: -2 _number_](#docker-container-start-timeout-before-error--2-number)
- [Path to 503 error page: -5 _/path/to/filename.html_](#path-to-503-error-page--5-pathtofilenamehtml)
- [Path to borg details file: -b _/path/to/filename.file_](#path-to-borg-details-file--b-pathtofilenamefile)
- [File name of docker-compose configuration file: -d _filename.file_](#file-name-of-docker-compose-configuration-file--d-filenamefile)
- [Log file location: -l _/path/to/filename.file_](#log-file-location--l-pathtofilenamefile)
- [File name of Mailcow master configuration file: -m _filename.file_](#file-name-of-mailcow-master-configuration-file--m-filenamefile)
- [Verbose output from borg: -v (no arguments)](#verbose-output-from-borg--v-no-arguments)
- [Path to webroot: -w _/path/to/webroot/_](#path-to-webroot--w-pathtowebroot)
- [Borg details file](#borg-details-file)
- [Protect your borg details file](#protect-your-borg-details-file)
- [borg specific entries (lines 1-4)](#borg-specific-entries-lines-1-4)
- [Line 1: Path to borg base directory](#line-1-path-to-borg-base-directory)
- [Line 2: Path to SSH key for remote server](#line-2-path-to-ssh-key-for-remote-server)
- [Line 3: Connection string to remote repo](#line-3-connection-string-to-remote-repo)
- [Line 4: Password for borg repo/repo key](#line-4-password-for-borg-reporepo-key)
- [additional files/directories to backup](#additional-filesdirectories-to-backup)
- [exclusion patterns](#exclusion-patterns)
- [prune timeframe options](#prune-timeframe-options)
- [borg remote location](#borg-remote-location)
- [Examples](#examples)
- [503 functionality](#503-functionality)
- [Conditional forwarding by your webserver](#conditional-forwarding-by-your-webserver)
- [NGINX](#nginx)
- [Apache](#apache)
- [Disabling 503 functionality altogether](#disabling-503-functionality-altogether)
- [Scheduling: Cron](#scheduling-cron)
- [The log file](#the-log-file)
- [Using Logwatch](#using-logwatch)
- [Remember to rotate your logs](#remember-to-rotate-your-logs)
- [Final notes](#final-notes) - [Final notes](#final-notes)
## Installation/copying ## quick start
Once you've either cloned this git or downloaded the release file, simply copy Clone this repo or download a release file into a directory of your choosing. For all examples in this document, I will assume you will run the script from */scripts/backup*. Make sure the script file is executable and you protect the *.details* file since it contains things like your repo password:
the files within the archive to whatever location(s) that work for your setup.
I've stored the files in this git archive in a directory structure that should
match most default setups. I suggest keeping the contents of the
*'/root/scripts'* folder in that location since the root user must execute the
script anyways. If you edit the 503.html and mc_borg.details files in place,
then you don't have to specify their locations when running the script.
Remember to make the script executable! ```bash
# run commands as root
sudo -s
```Bash # find somewhere to clone the repo
cd /usr/local/src
# clone the repo from my server (best choice)
git clone https://git.asifbacchus.app/asif/MailcowBackup.git
# or clone from github
git clone https://github.com/asifbacchus/MailcowBackup.git
# make a home for your backup script
mkdir -p /scripts/backup
cd /scripts/backup
# copy files from cloned repo to this new home
cp /usr/local/src/MailcowBackup/backup/* ./
# make script executable and protect your .details file
chmod +x backup.sh chmod +x backup.sh
chmod 600 backup.details
``` ```
In addition, you can rename this script file to anything you like. The log file ## configuration file
will use that same name by default when naming itself and any mention of this
file in the logs will automatically use whatever name you choose to give it.
## Environment notes You will need to let the script know how to access your remote repo along with any passwords/keyfiles needed to encrypt data. This is all handled via the plain-text 'configuration details' file. By default, this file is named *backup.details*. The file itself is fully commented so setting it up should not be difficult. If you need more information, consult [page 4.0](https://git.asifbacchus.app/asif/MailcowBackup/wiki/4.0-Configuration-details-file) in this wiki.
The script is designed to be easy to use but still be flexible enough to ## running the script
accommodate a wide range of Mailcow setups. The script pulls nearly all it's
configuration from the Mailcow configuration files themselves, so it adapts to
nearly all customizations you may have in your environment. The script accepts
several optional parameters to override its default or detected settings. In
addition, it reads easy-to-edit external plain-text files for borg settings so
you don't have to weed through the script code to supply things like passwords.
**This script auto-detects the location of your Mailcow configuration file. If After setting up the *.details* file correrctly and assuming you are running a default set up of mailcow according to the documentation, you just have to run the script and it will find everything on it's own. In particular, the defaults are set as follows:
you have multiple files on your system with the same name as the configuration
file, the script will likely get confused and exit with an error**
## Why this script must be run as root - mailcow.conf is located at */opt/mailcow-dockerized/mailcow.conf*
- docker-compose file is located at */opt/mailcow-dockerized/docker-compose.yml*
- the log file will be saved in the same directory as the script with the same name as the script but with the extension *.log*
This script must be run by the root user and will exit with an error if you try To get a list of all configuration options with defaults:
running it otherwise. This is because a default secured setup of borgbackup
contains things like the repository private key that are locked out to root user
access only. In addition, the root user is guaranteed to have access to all
files you might want to backup.
## Script parameters ```bash
./backup.sh --help
You can run the script with the *'-?'* parameter to access the built-in help
which explains the parameters. However, the following is a more detailed
explanation of each parameter and how to use them. **Note that any parameters
needing a directory (webroot, log file location, etc.) can be entered with or
without the trailing '/' since it's stripped by the script anyways.**
General usage:
```Bash
/path/to/script/scriptname.sh -parameter argument -parameter argument ...
``` ```
### Optional parameters To run with defaults:
#### Docker container STOP timeout before error: -1 _number_ ```bash
./backup.sh
The amount of time, in seconds, to wait for a docker container to STOP
gracefully before aborting, logging the error and exiting the script.\
**Default: _120_**
#### Docker container START timeout before error: -2 _number_
The amount of time, in seconds, to wait for a docker container to START
before aborting, logging the error and exiting the script.\
**Default: _180_**
#### Path to 503 error page: -5 _/path/to/filename.html_
The path to an html file for the script to copy to your webroot during the
backup process. This file can be scanned by your webserver and a 503 error can
be issued to users letting them know that your Mailcow is 'temporarily
unavailable' while being backed up. A sample 503 page is included for you.
If you remove the default file or the one you specify is missing, a warning will
be issued by the script but, it will continue executing. More details on the
503 notification can be found later in the [503
functionality](#503-functionality) section of this document.\
**Default: _scriptpath/503.html_**
#### Path to borg details file: -b _/path/to/filename.file_
This is a text file that lays out various borg options such as repo name,
password, additional files to include, exclusion patters, etc. A sample file is
included for your reference. More details, including the *required order* of
entries can be found later in this document in the [borg details
file](#borg-details-file) section.\
**Default: _scriptpath/mc_borg.details_**
#### File name of docker-compose configuration file: -d _filename.file_
This is the file name of your docker-compose configuration file that is used to
build/start/stop containers. This script will only search for this file within
the same directory where your Mailcow configuration file is found.\
**Default: _docker-compose.yml_**
#### Log file location: -l _/path/to/filename.file_
If you have a particular place and filename you'd like this script to use for
it's log, then you can specify it using this parameter. I would recommend
*'/var/log/backup.log'*. By default, the script will name the log file
*scriptname*.log and will save it in the same directory as the script itself.\
**Default: _scriptpath/scriptname.log_**
#### File name of Mailcow master configuration file: -m _filename.file_
This is the file name of the Mailcow master configuration file that was
generated after installation and contains all information needed to run Mailcow
(database user name, volume directory prefixes, etc.) This script will search
your computer for either the default file name or the one you have provided.
Upon finding it, the script will derive the file path and use that as the path
in which to run all Mailcow/docker commands. **Please do not have multiple
files on your system with this name, the script WILL get confused and exit with
an error.\
**Default: _mailcow.conf_**
#### Verbose output from borg: -v (no arguments)
By default, the script will ask borg to generate summary only output and record
that in the script's log file. If you are running the backup for the first time
or are troubleshooting, you may want a detailed output of all files and their
changed/unchanged/excluded status from borg. In that case, specify the -v
switch. **Note: This will make your log file very large very quickly since EVERY
file being backed up is written to the log.**
#### Path to webroot: -w _/path/to/webroot/_
This is the path to the directory your webserver is using as it's default root.
In other words, this is the directory that contains the html files served when
someone browses to your server. The correct webroot depends greatly on your
particular setup.
If you directly connect to Mailcow via Docker, then your webroot is by default
*/opt/mailcow-dockerized/data/web*, unless you've made changes to your install
locations. If you are running behind a reverse-proxy, then your webroot is your
webserver's webroot (*/var/www* or */usr/share/nginx/html*, for example).
This is used exclusively for 503 functionality since the script has to know
where to copy the 503 file. If you don't want to use this functionality, you
can omit this parameter and the script will issue a warning and move on. More
details can be found in the [503 functionality](#503-functionality) section
later in this document.
## Borg details file
This file contains all the data needed to access your borg remote data repo.
Each line must contain specific information in a specific order or **needs to be
blank if that data is not required**. The sample file includes this data and
example entries. The file must have the following information in the following
order:
1. path to borg base directory **(required)**
2. path to ssh private key for remote server **(required)**
3. connection string to remote repo **(required)**
4. password for borg repo/repo key **(required)**
5. path to file listing additional files/directories to backup
6. path to file containing borg-specific exclusion patterns
7. prune timeframe options
8. location of borg remote instance
### Protect your borg details file
This file contains information on how to access and decrypt your borg repo,
therefore, you **must** protect it. You should lock it out for everyone but
your root user. Putting it in your root folder is not enough! Run the following
commands to restrict access to the root user only (assuming filename is
*mc_borg.details*):
```Bash
chown root:root mc_borg.details # make root the owner of this file
chmod 600 mc_borg.details # grant access to root user only (read/write)
``` ```
### borg specific entries (lines 1-4) To run with a custom log file name and location:
If you need help with these options, then you should consult the borg ```bash
documentation or search my blog at ./backup.sh --log /var/log/mailcow_backup.log
[https://mytechiethoughts.com](https://mytechiethoughts.com) for borg. Here's a
very brief overview:
#### Line 1: Path to borg base directory
This is primary directory on your local system where your borg configuration is
located, **NOT* the path to your borg binary. The base directory contains the
borg configuration, cache, security files and keys.
#### Line 2: Path to SSH key for remote server
This is the SSH key used to connect to your remote (backup) server where your
borg repo is located. **This is NOT your borg repo key!**
> Please note: If you are planning on executing this script via cron or some
> other form of automation, it is *highly recommended* that you use an SSH key
> **without** a password! SSH is designed such that passwords cannot simply be
> passed to it via environment variables, etc. so this is something not easily
> automated by a script such as this for security reasons. As such, your
> computer will sit and wait for you to enter the password and will NOT execute
> the actual backup portion of the script until the SSH key password is provided.
>
> If you really want/need to use an SSH key password, you will have to look into
> somethign like GNOME keyring or SSH-agent to provide a secure automated way to
> provide that password to SSH and allow this script to continue.
>
> In practice, SSH keys without passwords are still quite safe since the key
> must still be known in order to connect and most keys are quite long. In
> addition, they key only connects to the remote server, your actual information
> within the borg repository is still encrypted and secured with both a key and
> password.
#### Line 3: Connection string to remote repo
This is the full server and path required to connect to your borg repo on the
remote server. Very often it is the in the form of:
```
user@servername.tld:repo-name/
``` ```
for rsync.net it is in the following form: To copy a 503 error page to your webroot:
``` ```bash
username@server-number.rsync.net:repo-name/ # assuming default NGINX webroot (/usr/share/nginx/html)
./backup.sh -5
# custom webroot
./backup.sh -5 -w /var/www/
``` ```
#### Line 4: Password for borg repo/repo key Common usage: custom log file and copy 503 to custom webroot
This is the password needed to access and decrypt your *borg repo*. Assuming ```bash
you set up your borg repo using recommended practices, this will actually be the ./backup.sh -l /var/log/mailcow_backup.log -5 -w /var/www/
password for your *borg repo private key*. **This is NOT your SSH key
password!**
### additional files/directories to backup
This points to a plain-text file listing additional files and directories you'd
like borg to include in the backup. The sample file, *'xtraLocations.borg'*
contains the most likely files you'd want to include assuming you're using a
standard setup like I outline in my blog.
The following would include all files in the home folder for users *'foo'* and
*'bar'* and any conf files in *'/etc/someProgram'*:
```Bash
/home/foo/
/home/bar/
/etc/someProgram/*.conf
``` ```
*You can leave this line blank* to tell borg to only backup your Mailcow data, Non-default mailcow location (example: */var/mailcow*):
configuration and the SQL dump. However, this is pretty unusual since you would
not be including any server configuration files, reverse-proxy configurations,
etc. If you omit this line, the script will log a warning to remind you of this
unusual situation.
### exclusion patterns ```bash
./backup.sh --docker-compose /var/mailcow/docker-compose.yml --mailcow-config /var/mailcow/mailcow.conf
This points to a plain-text file containing borg-specific patterns describing
what files you'd like borg to ignore during the backup. To specify exclusions,
create a text file in any location you want and specify exclusions patterns, one
per line. Then update line 6 in your borg details file with the path to your
new exclusion file.
You need to run *'borg help patterns'* for help on how to specify exclusion
patterns since the format is not always standard BASH format and only sometimes
uses standard regex.
If you leave this line blank, the script will note it is not processing any
exclusions and will proceed with backing up all files specified.
### prune timeframe options
Here you can let borg prune know how you want to manage your backup history.
Consult the borg documentation and then copy the relevant options directly into
this line including any spaces, etc. The example file contains the following as
a staring point:
```Ini
--keep-within=7d --keep-daily=30 --keep-weekly=12 --keep-monthly=-1
``` ```
This would tell borg prune to keep ALL backups made for any reason within the For more configuration options, see [page 3.0](https://git.asifbacchus.app/asif/MailcowBackup/wiki/3.0-Script-parameters) in the wiki and [page 4.4](https://git.asifbacchus.app/asif/MailcowBackup/wiki/4.4-Configuration-examples) for some configuration examples. Consult [section 7]() of the wiki for information about the log file and how to integrate it with logwatch.
last 7 days, keep 30 days worth of daily backups, 12 weeks of end-of-week
backups and then an infinite amount of end-of-month backups.
### borg remote location ## scheduling your backup via cron
If you're using rsync.net, then just have this say *'borg1'*. If you are using Edit your root user's crontab and add an entry like this which would run the script using defaults at 1:07am daily:
another provider, you'll have to reference their locally installed copy of borg
relative to your home directory. You can also leave this blank if your provider
does not run borg locally but your backups/restores will be slower.
### Examples ```ini
7 1 * * * /scripts/backup/backup.sh -l /var/log/mailcow_backup.log > /dev/null 2>&1
Repo in directory *'MailcowBackup'*, all fields including pointers to additional
files to backup, exclusion patterns and a remote borg path. Prune: keep all
backups made in the last 14 days.
```Ini
/var/borgbackup
/var/borgbackup/SSHprivate.key
myuser@usw-s001.rsync.net:MailcowBackup/
myPaSsWoRd
/root/scripts/xtraLocations.borg
/root/scripts/excludeLocations.borg
--keep-within=14d
borg1
``` ```
Repo in directory *'myBackup'*, no exclusions, keep 14 days end-of-day, 52 weeks
end-of-week
```Ini
/var/borgbackup
/root/keys/rsyncPrivate.key
myuser@usw-s001.rsync.net:myBackup/
PaSsWoRd
/var/borgbackup/include.list
--keep-daily=14 --keep-weekly=52
borg1
```
Repo in directory *'backup'*, no extra file locations, no exclusions, no remote
borg installation. Keep last 30 backups.
```Ini
/root/.borg
/root/.borg/private.key
username@server.tld:backup/
pAsSw0rD
--keep-within=30d
```
**Notice that the blank lines are very important!**
## 503 functionality
This script includes an entire section dedicated to copying an html file to act
as an error 503 notification page. Error 503 is by definition "service
temporarily unavailable" which is exactly the case for your Mailcow server
during a backup since the mail-flow containers have been disabled.
The script copies whatever file is defined by the *'-5'* parameter (or the
default located at *'scriptpath/503.html'*) to whatever path is defined as the
'webroot' by the *'-w'* parameter. This means that if you omit the *'-w'*
parameter, the script will necessarily skip this entire process and just issue a
warning to let you know about it.
### Conditional forwarding by your webserver
The script copying the file to the webroot is the easy part. Your webserver has
to look for the presence of that file and generate a 503 error in order for the
magic to happen. To do that, you have to include an instruction to that effect
in your default server definition and/or your Mailcow virtual server definition
file depending on your setup.
#### NGINX
You can copy the following code into the relevant server definition(s) on an
NGINX server:
```Perl
server {
...
if (-f /usr/share/nginx/html/503.html) {
return 503;
}
...
error_page 503 @backup
location @backup {
root /usr/share/nginx/html;
rewrite ^(.*)$ /503.html break;
}
}
```
This tells NGINX that if it finds the file *'503.html'* at the path
*'/usr/share/nginx/html'* (webroot on reverse proxy) then return an error code
503. Upon encountering a 503 error, rewrite any url to *'domain.tld/503.html'*
and thus, display the custom 503 error page. On the other hand, if it can't
find 503.html at the path specified (i.e. the script has deleted it because the
backup is completed), then go about business as usual.
#### Apache
I don't use apache for anything, ever... so I'm not sure how exactly you'd do
this but I think you'd have to use something like:
```Perl
RewriteEngine On
RewriteCond %{ENV:REDIRECT_STATUS} !=503
RewriteCond "/var/www/503.html" -f
RewriteRule ^ - [R=503,L]
...
ErrorDocument 503 /503.html
...
```
Let me know if that works and I'll update this document accordingly. Like I
said, I don't use Apache so I can't really test it very easily.
#### Disabling 503 functionality altogether
If you don't want to use the 503 functionality for whatever reason and don't
want your log file junked up with warnings about it, then find the section of
the script file that starts with *'--- Begin 503 section ---'* and either
comment all the lines (put a *'#'* at the beginning of each line) or delete all
the lines until you get to *'--- End 503 section ---'*.
## Scheduling: Cron
After running this script at least once manually to test your settings, you
should schedule it to run automatically so things stay backed up. This is
easiest with a simple cron job.
1. Open root's crontab:
```Bash
sudo crontab -e
```
2. Add your script command line and set the time. I'm assuming your script is
located at *'/root/scripts'*, all files are at their default locations and
you want to run your backup at 1:07am daily.
```Bash
7 1 * * * /root/scripts/backup.sh -l /var/log/backup.log -w /usr/share/nginx/html > /dev/null 2>&1
```
The last part redirects all output to 'null' and forwards any errors to
'null' also. You don't need output because the script creates a wonderfully
detailed log file that you can review :-)
3. Save the file and exit.
4. Confirm by listing the root user's crontab:
```Bash
sudo crontab -l
```
## The log file
The script creates a very detailed log file of all major operations along with
any errors and warnings. Everything is timestamped so you can see how long
things take and when any errors took place. The script includes debugging
notes such as where temp files are located, where it's looking for data, whether
it created/moved/copied files, etc. All major operations are tagged *'-- [INFO]
message here --'*. Similarly, warnings are tagged *'-- [WARNING] message here
(code: xxxx) --'* and errors are tagged *'-- [ERROR] message here (code: xxx)
--'*. Successful operations generate a *'-- [SUCCESS] message here --'* stamp.
Sections of the script are all colour-coded to make viewing it easier. This
means you should use something like *'cat backup.log | more'* or *'tail -n
numberOfLines backup.log'* to view the file since the ansi colour codes
would make it difficult to read in nano or vi.
This tagging makes it easy for you to set up a log screening program to make
keeping an eye on your backup results easier. If you plan on using Logwatch
(highly recommended, great program!) then I've done the work for you...
### Using Logwatch
Log-group, conf and service files are included so that you can easily setup
Logwatch to monitor the script's log file and report at your desired detail
level as follows:
1. 0: Summary of total successes, warnings & errors only
2. 1-4: Actual success, error & warning messages
3. 5: Same as above, but includes info messages
4. 6+: Dumps entire raw log file including debugging messages
A detailed breakdown of the files and all options are included in a separate
readme in the *'/etc/logwatch'* folder of this git archive.
If you don't really care how it works, you can just copy the files from this
archive to your *'/etc/logwatch'* directory. The directory structure is correct
for a default Logwatch install on Debian/Ubuntu. You will have to update the
log-group file to reflect the path to your script's log file.
### Remember to rotate your logs
The log file generated by this script is fairly detailed so it can grow quite
large over time. This is especially true if you are using verbose output from
borg for any troubleshooting or for compliance/auditing. I've included a sample
commented *logrotate config file* in this git archive at *'/etc/logrotate.d'*
which you can modify and drop into that same directory on your Debian/Ubuntu
system. If you are using another log rotating solution, then please remember to
configure it so that your log files don't get overwhelmingly large should you
need to parse them if something goes wrong with your backups.
## Final notes ## Final notes
I think that's everything. If I've forgotten to document something, please let I think that's everything. For detailed information, please review the [wiki](https://git.asifbacchus.app/asif/MailcowBackup/wiki/_pages). If I've forgotten to document something there, please let me know. I know the wiki is long but, I hate how much stuff for linux and open-source programs/scripts in general are so poorly documented especially for newbies and I didn't want to make that same mistake.
me know. I know this readme is long but, I hate how much stuff for linux and
open-source programs/scripts in general are so poorly documented especially for
newbies and I didn't want to make that same mistake.
I don't script too often and I'm a horrible programmer, so if you see anything I don't script too often and I'm a horrible programmer, so if you see anything that can be/should be improved, please let me know by filing an issue or submit your changes via a pull request! I love learning new ways of doing things and getting feedback, so suggestions and comments are more than welcome.
that can be/should be improved, please let me know or submit your changes! I
love learning new ways of doing things and getting feedback, so suggestions and
comments are more than welcome.
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[https://mytechiethoughts.com](https://mytechiethoughts.com) where I solve
problems like this all the time on a shoe-string or zero budget. Thanks!