Mattermost is an open-source, self-hosted online chat service written in Go and JavaScript.


For this guide you should be familiar with the basic concepts of


You’ll need your MySQL credentials. Get them with my_print_defaults:

[isabell@stardust ~]$ my_print_defaults client
[isabell@stardust ~]$

Your URL needs to be setup:

[isabell@stardust ~]$ uberspace web domain list
[isabell@stardust ~]$


Download the most recent Linux TAR archive from the Mattermost website:

[isabell@stardust ~]$ wget
--2019-12-23 13:27:01--
Resolving (,,, ...
Connecting to (||:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 155306557 (148M) [application/x-gzip]
Saving to: ‘mattermost-5.18.0-linux-amd64.tar.gz’

100%[====================================================================>] 155,306,557 22.5MB/s   in 6.6s

2019-12-23 13:27:08 (22.6 MB/s) - ‘mattermost-5.18.0-linux-amd64.tar.gz’ saved [155306557/155306557]

[isabell@stardust ~]$

Extract the archive:

[isabell@stardust ~]$ tar xfv mattermost-5.18.0-linux-amd64.tar.gz
[isabell@stardust ~]$


Set up a Database

Run the following code to create the database <username>_mattermost in MySQL:

[isabell@stardust ~]$ mysql -e "CREATE DATABASE ${USER}_mattermost COLLATE utf8mb4_unicode_ci;"
[isabell@stardust ~]$

Change the configuration

You need to set up your URL, and MySQL settings in ~/mattermost/config/config.json.

First, set your site URL:

"SiteURL": ""

Then find the SqlSettings block and change DriverName driver to mysql. Change DataSource like bellow but replace isabell on both occasions with your uberspace username and MySuperSecretPassword with your MySQL password:

   "SqlSettings": {
     "DriverName": "mysql",
     "DataSource": "isabell:MySuperSecretPassword@tcp(localhost:3306)/isabell_mattermost?charset=utf8mb4,utf8\u0026readTimeout=30s\u0026writeTimeout=30s",
     "DataSourceReplicas": [],
     "DataSourceSearchReplicas": [],
     "MaxIdleConns": 20,
     "ConnMaxLifetimeMilliseconds": 3600000,
     "MaxOpenConns": 300,
     "Trace": false,
     "AtRestEncryptKey": "",
     "QueryTimeout": 30

Configure web server


Mattermost is running on port 8065.

To make the application accessible from the outside, configure a web backend:

[isabell@stardust ~]$ uberspace web backend set / --http --port <port>
Set backend for / to port <port>; please make sure something is listening!
You can always check the status of your backend using "uberspace web backend list".
[isabell@stardust ~]$

Setup daemon

Create ~/etc/services.d/mattermost.ini with the following content:


After creating the configuration, tell supervisord to refresh its configuration and start the service:

[isabell@stardust ~]$ supervisorctl reread
SERVICE: available
[isabell@stardust ~]$ supervisorctl update
SERVICE: added process group
[isabell@stardust ~]$ supervisorctl status
SERVICE                            RUNNING   pid 26020, uptime 0:03:14
[isabell@stardust ~]$

If it’s not in state RUNNING, check your configuration.

Setup a user

You can now point your browser to your URL and setup a user. Do this immediately after starting the server, as the very first user will be an administrator user.

Further customisation

To further customise your configuration, you can open the system console in your browser and adapt any settings to your wishes. Setting the SMTP server is a good idea.



  1. Stop your service,

  2. Backup your directories
    • /home/isabell/mattermost/client/plugins,

    • /home/isabell/mattermost/config,

    • /home/isabell/mattermost/data,

    • /home/isabell/mattermost/logs

    • /home/isabell/mattermost/plugins

  3. Rename/delete your /home/isabell/mattermost directory.

  4. Proceed with the installation steps and restore the client/plugins, config, data, logs and plugins directories.

  5. Then you can start your service again.

When upgrading to Mattermost 6.4 or newer you need to change the collation of the database:

[isabell@stardust ~]$ mysql -e "ALTER DATABASE isabell_mattermost COLLATE = utf8mb4_general_ci;"
[isabell@stardust ~]$

Automatic Update

Use the script attached to update Mattermost to the current version. Run the script above the mattermost-root directory.

printf "\n===\nWelcome to updating Mattermost... let us begin!\n===\n"

printf "\n== Preflight Checks ==\n"
if [ ! -d "./mattermost" ]; then
printf "Error: ./mattermost directory does not exist. Are you running in the correct place?. Exit\n"
exit 1
        printf "Directory ./mattermost found.\n"

database=$(cat ./mattermost/config/config.json | jq '.SqlSettings.DataSource' | grep -o '/.*?' | tail -c +2 | head -c -2)
if [ -z "$database" ]
        printf "\nError: Could not extract the database name from ./mattermost/config/config.json. Maybe the script runs in the wrong directory? Exit 1.\n"
        exit 2
        printf "Using database: $database\n"

if [ -z "$version" ]
        printf "No manual version given. Check from official website ...\n"

        tag_name=$(curl --silent --location |
          jq --raw-output '.tag_name')
        version=${tag_name:1} # This will remove the first character `v` from the version tag `v1.2.3`

        printf "Newest Version detected: v$version. For the changes introduced with this update see:\n"

usedVersion=$(./mattermost/bin/mattermost version | grep -Po "(?<=Version: )([0-9]|\.)*(?=\s|$)")
if [ "$usedVersion" = "$version" ]
        printf "\n=== You are up-to-date. No update needed. ===\n"
        exit 0

printf "\n== Prepare for takeoff ==\n"

printf "Downloading Version v$version...\n"

printf "\nExtracting Version ..."
tar -xf $mattermostfile --transform='s,^[^/]\+,\0-upgrade,'

printf "\nCreate Backup of filesystem..."
backupdir="mattermost-back-$(date +'%F-%H-%M')/"
cp -ra mattermost/ $backupdir

printf "\nCreate Backup of database: '$database' ..."
mysqldump --databases $database > $backupdir/$database.dump.sql

printf "\n== Take off ==\n"
printf "\nStop Service - ..."
supervisorctl stop mattermost

printf "\nDelete all old files ..."
find mattermost/ mattermost/client/ -mindepth 1 -maxdepth 1 \! \( -type d \( -path mattermost/client -o -path mattermost/client/plugins -o -path mattermost/config -o -path mattermost/logs -o -path mattermost/plugins -o -path mattermost/data \) -prune \) | sort | xargs rm -r

printf "\nApply new files ..."
cp -an mattermost-upgrade/. mattermost/

printf "\nStart Service again ..."
supervisorctl start mattermost

printf "\n== Take off complete ==\n"

printf "\nClean up files ..."
rm -r mattermost-upgrade/
rm -i mattermost*.gz

printf "\n===\nUpdate completed successfully.\n==="

Tested with Mattermost 7.7.1 and Uberspace 7.13.0

Written by: Nico Graf <>