Mattermost is an open-source, self-hostable online chat service with file sharing, search, and integrations. It is designed as an internal chat for organizations and companies, and mostly markets itself as an open-source alternative to Slack and Microsoft Teams. In this step by step guide I will show you how to install Mattermost on your Synology NAS using Docker and Portainer.

💡Note: This guide works perfectly with the latest Mattermost v9.10.3 release.

STEP 1

Please Support My work by Making a Donation.

STEP 2

Install Portainer using my step by step guide. If you already have Portainer installed on your Synology NAS, skip this STEP. Attention: Make sure you have installed the latest Portainer version.

STEP 3

Make sure you have a synology.me Wildcard Certificate. Follow my guide to get a Wildcard Certificate. If you already have a synology.me Wildcard certificate, skip this STEP.

STEP 4

Go to Control Panel / Login Portal / Advanced Tab / click Reverse Proxy. Follow the instructions in the image below.

STEP 5

Now click the “Create” button. Follow the instructions in the image below.

STEP 6

After you click the Create button, the window below will open. Follow the instructions in the image below.

On the General area, set the Reverse Proxy Name description: type in Mattermost Chat. After that, add the following instructions:

Source:
Protocol: HTTPS
Hostname: chat.yourname.synology.me
Port: 443

Check Enable HSTS

Destination:
Protocol: HTTP
Hostname: localhost
Port: 8401

STEP 7

On the Reverse Proxy Rules click the Custom Header tab. Click Create and then, from the drop-down menu, click WebSocket. After you click on WebSocket, two Header Names and two Values will be automatically added. Click Save. Follow the instructions in the image below.

STEP 8

Go to Control Panel / Network / Connectivity tab/ Check Enable HTTP/2 then click Apply. Follow the instructions in the image below.

STEP 9

Go to Control Panel / Security / Advanced tab/ Check Enable HTTP Compression then click Apply. Follow the instructions in the image below.

STEP 10

Go to File Station and open the docker folder. Inside the docker folder, create one new folder and name it mattermost. Follow the instructions in the image below.
Note: Be careful to enter only lowercase, not uppercase letters.

STEP 11

Now create seven new folders inside the mattermost folder that you created at STEP 10 and name them client, config, data, db, indexes, logs, plugins. Follow the instructions in the image below.
Note: Be careful enter only lowercase, not uppercase letters.

STEP 12

Log into Portainer using your username and password. On the left sidebar in Portainer, click on Stacks then + Add stack. Follow the instructions in the image below.

STEP 13

In the Name field type in mattermost. Follow the instructions in the image below.

Note: Copy Paste the code below in the Portainer Stacks Web editor.

version: "3.9"
services:
  mattermost-db:
    image: postgres:16
    container_name: Mattermost-DB
    hostname: mattermost-db
    security_opt:
      - no-new-privileges:true
    pids_limit: 100
    healthcheck:
      test: ["CMD", "pg_isready", "-q", "-d", "mattermost", "-U", "mattermostuser"]
      interval: 10s
      timeout: 5s
      retries: 5
    volumes:
      - /volume1/docker/mattermost/db:/var/lib/postgresql/data:rw
    environment:
      - POSTGRES_DB=mattermost
      - POSTGRES_USER=mattermostuser
      - POSTGRES_PASSWORD=mattermostpw
      - TZ=Europe/Bucharest
    restart: on-failure:5

  mattermost:
    image: mattermost/mattermost-team-edition:latest
    container_name: Mattermost
    hostname: mattermost
    security_opt:
      - no-new-privileges:true
    pids_limit: 200
    user: 1026:100
    volumes:
      - /volume1/docker/mattermost/config:/mattermost/config:rw
      - /volume1/docker/mattermost/data:/mattermost/data:rw
      - /volume1/docker/mattermost/logs:/mattermost/logs:rw
      - /volume1/docker/mattermost/plugins:/mattermost/plugins:rw
      - /volume1/docker/mattermost/client:/mattermost/client/plugins:rw
      - /volume1/docker/mattermost/indexes:/mattermost/bleve-indexes:rw
    environment:
      - TZ=Europe/Bucharest
      - MM_SQLSETTINGS_DRIVERNAME=postgres
      - MM_SQLSETTINGS_DATASOURCE=postgres://mattermostuser:mattermostpw@mattermost-db:5432/mattermost?sslmode=disable&connect_timeout=10
      - MM_BLEVESETTINGS_INDEXDIR=/mattermost/bleve-indexes
      - MM_SERVICESETTINGS_SITEURL=https://chat.yourname.synology.me
    ports:
      - 8401:8065
    restart: on-failure:5
    depends_on:
      mattermost-db:
        condition: service_started

Note: Before you paste the code above in the Web editor area below, change the value numbers for user with your own UID and GID values. (Follow my step by step guide on how to do this.) 1026 is my personal UID value and 100 is my personal GID value. You have to type in your own values.
Note: Before you paste the code above in the Web editor area below, change the value for TZ. (Select your current Time Zone from this list.)
Note: Before you paste the code above in the Web editor area below, change the value for MM_SERVICESETTINGS_SITEURL and type in your own synology.me DDNS that you have previously created at STEP 6.

STEP 14

Scroll down on the page until you see a button named Deploy the stack. Click on it. Follow the instructions in the image below. The installation process can take up to a few minutes. It will depend on your Internet speed connection.

STEP 15

If everything goes right, you will see the following message at the top right of your screen: “Success Stack successfully deployed“.

STEP 16

🟢Please Support My work by Making a Donation. Almost 99,9% of the people that install something using my guides forget to support my work, or just ignore STEP 1. I’ve been very honest about this aspect of my work since the beginning: I don’t run any ADS, I don’t require subscriptions, paid or otherwise, I don’t collect IPs, emails, and I don’t have any referral links from Amazon or other merchants. I also don’t have any POP-UPs or COOKIES. I have repeatedly been told over the years how much I have contributed to the community. It’s something I love doing and have been honest about my passion since the beginning. But I also Need The Community to Support me Back to be able to continue doing this work.

STEP 17

Now open your browser and type in your HTTPS/SSL certificate like this https://chat.yourname.synology.me In my case it’s https://chat.mariushosting.synology.me If everything goes right, you will see the Mattermost installation page. Click View in Browser. Follow the instructions in the image below.

STEP 18

Add your own credentials. Email, Username and Password then click Create Account. Follow the instructions in the image below.

STEP 19

Type in your organization name then click Continue. Follow the instructions in the image below.

STEP 20

Click Continue or select the tools you work with. Follow the instructions in the image below.

STEP 21

Click Finish setup. Follow the instructions in the image below.

STEP 22

Your Mattermost dashboard at a glance!

STEP 23

Set Up Email Notifications on Mattermost.

Enjoy Mattermost!

🆘TROUBLESHOOTING

If you encounter issues by using this container, make sure to check out the Common Docker issues article.

This post was updated on Tuesday / January 14th, 2025 at 10:24 PM

How to Install Mattermost on Your Synology NAS

💡Note: This guide works perfectly with the latest Mattermost v9.10.3 release.

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🆘TROUBLESHOOTING

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