How to Install openGym on Your Synology NAS

openGym is a free, open-source gym and body-weight tracker that lets you plan weekly routines, run guided workouts with animated demos from a large exercise library, log every set, and monitor body weight plus muscle progress through maps for balance, fatigue, and strength. It keeps all your data under your control with no subscriptions, ads, or telemetry, and works either as a standalone mobile app or as a self-hosted service you run yourself with Docker for syncing across devices via passkey login. After switching from commercial trackers, openGym has been a clear improvement for me. Owning the complete workout history without upsells or data sharing feels liberating, the guided sessions and muscle map make consistency and balanced training straightforward, and the option to self-host means my logs stay private even when syncing between phone and computer. In this step by step guide I will show you how to install openGym on your Synology NAS using Docker & Dockhand.

💡Note: This guide works perfectly with the latest openGym v1.4.4 release.

STEP 1

Please Support My work by Making a Donation.

STEP 2

Install Dockhand using my step by step guide. If you already have Dockhand installed on your Synology NAS, skip this STEP. ⚠️Attention: Make sure you have installed the latest Dockhand 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 OpenGym. After that, add the following instructions:

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

Check Enable HSTS

Destination:
Protocol: HTTP
Hostname: localhost
Port: 5445

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 opengym. Follow the instructions in the image below.
Note: Be careful to enter only lowercase, not uppercase letters.

STEP 11

Now create two new folders inside the opengym folder that you have previously created at STEP 10 and name them coach-auth and data. Follow the instructions in the image below.
Note: Be careful to enter only lowercase, not uppercase letters.

STEP 12

Open your browser and type in http://synology-ip-address:3866 to connect to your Dockhand container. On the left sidebar, click Stacks then + Create. Follow the instructions in the image below.

STEP 13

In the Stack name field, type in opengym. ⚠️Warning: Type in the name in lowercase letters. The installation process can take up to a few seconds/minutes. It will depend on your Internet speed connection. Follow the instructions in the image below.

Note: Copy Paste the code below in the Dockhand Compose Stack then click Create & Start.

services:
  opengym-api:
    image: ghcr.io/duartesantos8/opengym-api:latest
    container_name: OpenGym-API
    hostname: opengym-api
    user: 0:0
    healthcheck:
      test: ["CMD-SHELL", "wget -qO- http://127.0.0.1:3777/api/health || exit 1"]
      interval: 30s
      timeout: 10s
      retries: 5
      start_period: 40s
    environment:
      PORT: 3777
      DATA_DIR: /data
      TRUST_PROXY: 1
      RP_ID: opengym.yourname.synology.me #or your own NASLOCALIP.
      ORIGIN: https://opengym.yourname.synology.me #or your NASLOCALIP with http:// at the beginning and :5445 at the end.
      RP_NAME: mariushosting
      FIRST_USER_ADMIN: 1
      INVITE_ONLY: 0 #switch to 1 instead of 0 after you create your first admin user.
      ALLOW_GUEST: 0
      SESSION_DAYS: 90
      DEFAULT_LANG: en
      PASSWORD_LOGIN: 1
      AUDIT_LOG: 1
      AUDIT_MAX: 5000
      AUDIT_DAYS: 90
      AUDIT_IP: off
    volumes:
      - /volume1/docker/opengym/data:/data:rw
      - /volume1/docker/opengym/coach-auth:/coach-auth:rw
    restart: on-failure:5

  opengym-web:
    image: ghcr.io/duartesantos8/opengym-web:latest
    container_name: OpenGym-WEB
    hostname: opengym-web
    user: 0:0
    healthcheck:
      test: ["CMD-SHELL", "wget -qO- http://127.0.0.1/ || exit 1"]
      interval: 30s
      timeout: 10s
      retries: 5
      start_period: 30s
    environment:
      NGINX_PORT: 80
      BACKEND: opengym-api
      PORT: 3777
      RESOLVER: 127.0.0.11
      MEDIA_UPLOAD_MAX: 48m
      # Optional – set if behind Cloudflare or using a subpath
      # CF_CONNECTING_IP: "$http_cf_connecting_ip"
      # BASE_PATH: /gym
    ports:
      - 5445:80
    depends_on:
      opengym-api:
        condition: service_started
    restart: on-failure:5

Note: Before you paste the code above in the Stack editor area below, change the value for RP_ID and type in your own synology.me DDNS without https:// at the beginning that you have previously created at STEP 6.
Note: Before you paste the code above in the Stack editor area below, change the value for ORIGIN and type in your own synology.me DDNS with https:// at the beginning that you have previously created at STEP 6.
Note: Before you paste the code above in the Stack editor area below, change the value for RP_NAME and type in your own instance name. mariushosting is an example of an instance name. You should use your own name.
Note: Before you paste the code above in the Stack editor area below, change the value for DEFAULT_LANG and add your own default language.

STEP 14

If everything goes right, you will see the following message at the bottom right of your screen: “Created stack “opengym”“.

STEP 15

🟢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 16

Now open your browser and type in your HTTPS/SSL certificate like this https://opengym.yourname.synology.me that you have previously created at STEP 6. In my case it’s https://opengym.mariushosting.synology.me Click Create new profile. Follow the instructions in the image below.