How to Install Sync-in on Your Synology NAS

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How to Install Sync-in on Your Synology NAS

Sync-in is a secure, open-source platform for file storage, sharing, collaboration, and synchronization, giving users full data control through self-hosted infrastructure. It ensures privacy with no tracking or telemetry and offers granular permission management for users and groups at space and file levels. The platform supports cross-device synchronization with native desktop clients for Windows, macOS, and Linux, real-time collaborative document editing via OnlyOffice integration, and organized, secure spaces for personal, team, or public use. Files can be shared with specific users, groups, or via time-limited public links. It includes server-side full-text indexing for fast content search, activity history with notifications, and WebDAV support to mount spaces as remote drives. In this step by step guide I will show you how to install Sync-inĀ on your Synology NAS using Docker & Portainer.

šŸ’”Note: This guide works perfectly with the latest Sync-in v1.2.0 release.

  • STEP 1

Please Support My work by Making a Donation.

  • STEP 2

InstallĀ 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

Install Text Editor via Synology ā€œPackage Centerā€. (Mandatory STEP.) If you already have Text Editor installed on your Synology NAS, skip this STEP.

Synology Install Text Editor 2023

  • STEP 4

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 5

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

Sync-in Synology NAS Set up 1

  • STEP 6

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

Sync-in Synology NAS Set up 2

  • STEP 7

Go toĀ Control PanelĀ /Ā Login PortalĀ /Ā AdvancedĀ Tab / clickĀ Reverse Proxy. Follow the instructions in the image below.

Sync-in Synology NAS Set up 3

  • STEP 8

Now click the ā€œCreateā€ button. Follow the instructions in the image below.

Sync-in Synology NAS Set up 4

  • STEP 9

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 Sync-in. After that, add the following instructions:

Source:
Protocol:Ā HTTPS
Hostname: syncin.yourname.synology.me
Port:Ā 443

Check Enable HSTS

Destination:
Protocol:Ā HTTP
Hostname:Ā localhost
Port:Ā 8324

Sync-in Synology NAS Set up 5

  • STEP 10

Go toĀ Control PanelĀ /Ā Login PortalĀ /Ā AdvancedĀ Tab / clickĀ Reverse Proxy. Follow the instructions in the image below.

Sync-in Synology NAS Set up 6

  • STEP 11

Now click the ā€œCreateā€ button. Follow the instructions in the image below.

Sync-in Synology NAS Set up 7

  • STEP 12

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 OnlyOffice. After that, add the following instructions:

Source:
Protocol:Ā HTTPS
Hostname: onlyoffice.yourname.synology.me
Port:Ā 443

Check Enable HSTS

Destination:
Protocol:Ā HTTP
Hostname:Ā localhost
Port:Ā 8467

Sync-in Synology NAS Set up 8

  • STEP 13

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

Sync-in Synology NAS Set up 9

  • STEP 14

Now create four new folders inside the syncin folder that you have previously created at STEP 13, and name them data, db, onlyoffice, static. Follow the instructions in the image below.
Note: Be careful to enter only lowercase, not uppercase letters.

Sync-in Synology NAS Set up 10

  • STEP 15

Now create seven new folders inside the syncin folder that you have previously created at STEP 13, and name them data, database, fonts, lib, logs, rabbitmq, redis . Follow the instructions in the image below.
Note: Be careful to enter only lowercase, not uppercase letters.

Sync-in Synology NAS Set up 11

  • STEP 16

Download (click on the blue link below) and upload the environment.yaml file below in the syncin folder that you have previously created at STEP 13. Follow the instructions in the image below. šŸ”’Note: Support my work to unlock the password. You can use this password to download any file on mariushosting forever!

šŸ‘‰šŸ»environment.yaml

Sync-in Synology NAS Set up 12

  • STEP 17

Make sure you have installed Text Editor on your Synology NAS as per the instructions at STEP 3. Double click on the environment.yaml file to edit it. Change the following 2 secret parameters:
access
secret: (Generate your own FREE Random 64 length SECRET KEY.)

refresh
secret:Ā  (Generate your own FREE Random 64 length SECRET KEY.)

Both parameters should be different. Click X to save the file. Follow the instructions in the image below. Go straight to the next STEP.

Sync-in Synology NAS Set up 13

  • STEP 18

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

1 Synology Portainer Add Stack

  • STEP 19

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

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

services:
  sync_in:
    image: syncin/server:latest
    container_name: Sync-in
    healthcheck:
      test: ["CMD-SHELL", "nc -z 127.0.0.1 8080 || exit 1"]
      interval: 10s
      timeout: 5s
      retries: 3
      start_period: 90s
    environment:
       INIT_ADMIN_LOGIN: marius
       INIT_ADMIN_PASSWORD: mariushosting
       PUID: 1026
       PGID: 100
    ports:
      - 8324:8080
    volumes:
      - /volume1/docker/syncin/environment.yaml:/app/environment/environment.yaml
      - /volume1/docker/syncin/data:/app/data:rw
      - /volume1/docker/syncin/static:/app/static/releases:ro
    logging:
      driver: json-file
      options:
        max-size: "25m"
        max-file: "5"
    depends_on:
      - mariadb
      - onlyoffice
    restart: on-failure:10
      
  mariadb:
    image: mariadb:11.4-noble #LTS Long Time Support Until May 29, 2029.
    container_name: Sync-in-DB
    security_opt:
      - no-new-privileges:false
    command: --innodb_ft_cache_size=16000000 --max-allowed-packet=1G
    environment:
      MYSQL_DATABASE: sync_in
      MYSQL_ROOT_PASSWORD: mariushostingpassword
      TZ: Europe/Bucharest
    volumes:
      - /volume1/docker/syncin/db:/var/lib/mysql:rw
    restart: on-failure:5
    
  onlyoffice:
    container_name: Sync-in-ONLYOFFICE
    hostname: onlyoffice
    image: onlyoffice/documentserver:latest
    healthcheck:
      test: timeout 10s bash -c ':> /dev/tcp/127.0.0.1/80' || exit 1
      interval: 10s
      timeout: 5s
      retries: 3
      start_period: 90s
    ports:
      - 8467:80
    environment:
      JWT_ENABLED: true
      JWT_SECRET: q9TAW5pK5O9DqAWhY18XupmtlZk0ULRmjroiZcfvJkvZduSYzrzc0FtM2yfHEeyB
    volumes:
      - /volume1/docker/syncin/onlyoffice/logs:/var/log/onlyoffice:rw
      - /volume1/docker/syncin/onlyoffice/data:/var/www/onlyoffice/Data:rw
      - /volume1/docker/syncin/onlyoffice/redis:/var/lib/redis:rw
      - /volume1/docker/syncin/onlyoffice/rabbitmq:/var/lib/rabbitmq:rw
      - /volume1/docker/syncin/onlyoffice/lib:/var/lib/onlyoffice:rw
      - /volume1/docker/syncin/onlyoffice/fonts:/usr/share/fonts/truetype/custom:rw
      - /volume1/docker/syncin/onlyoffice/database:/var/lib/postgresql:rw
    restart: on-failure:5

Note: Before you paste the code above in the Web editor area below, change the value for INIT_ADMIN_LOGIN. Type in your own username. marius is an example for a username.
Note: Before you paste the code above in the Web editor area below, change the value for INIT_ADMIN_PASSWORD. Type in your own password. mariushosting is an example for a password.
Note: Before you paste the code above in the Web editor area below, change the value numbers for PUIDĀ andĀ PGIDĀ with your own values. (Follow my step by step guide on how to do this.)
Note: Before you paste the code above in the Web editor area below, change the value for MYSQL_ROOT_PASSWORD. Type in your own password. mariushostingpassword is an example for a password. āš ļøWARNING: Make sure you have installed Text Editor on your Synology NAS as per the instructions at STEP 3. Double click on the environment.yaml file that you have previously uploaded at STEP 16. Change the password with your own password in the environment.yaml file with the same identical password that you have added in the MYSQL_ROOT_PASSWORD area. šŸ–¼ļøCheck the EXAMPLE screenshot. Save the file.
Note: Before you paste the code above in the Web editor area below, change the value for TZ.Ā (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 JWT_SECRET. (Generate your own Random 64 length JWT_SECRET.)

Sync-in Synology NAS Set up 14

  • STEP 20

Scroll down on the page until you see a button namedĀ 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.

Sync-in Synology NAS Set up 17

  • STEP 21

If everything goes right, you will see the following message at the top right of your screen: ā€œSuccess Stack successfully deployedā€œ.

Sync-in Synology NAS Set up 18

  • STEP 22

Make sure you have installed Text Editor on your Synology NAS as per the instructions at STEP 3. Double click on the environment.yaml file to edit it. Change the externalServer parameter.

Type in your own synology.me DDNS with https:// at the beginning that you have previously created at STEP 12. Click X to save the file. Follow the instructions in the image below. Go straight to the next STEP.

Sync-in Synology NAS Set up 16 - New

  • STEP 23

Make sure you have installed Text Editor on your Synology NAS as per the instructions at STEP 3. Double click on the environment.yaml file to edit it. Change the secret parameter.

Type in your own OnlyOffice JWT_SECRET that you have previously added at STEP 19. Click X to save the file. Follow the instructions in the image below. Go straight to the next STEP.

Sync-in Synology NAS Set up 16

  • STEP 24

Open Portainer. On the left sidebar, click Containers. Select your Sync-in and Sync-in-DB instance, then click Restart. Follow the instructions in the image below.

Sync-in Synology NAS Portainer Restart

  • STEP 25

šŸŸ¢Please Support My work by Making a Donation. Almost 99,9% of the people that install something using my guidesĀ forget to support my work, or justĀ ignoreĀ STEP 1. Iā€™ve been very honest about this aspect of my work since the beginning: I donā€™t run any ADS, I donā€™t require subscriptions, paid or otherwise, I donā€™t collect IPs, emails, and I donā€™t have any referral links from Amazon or other merchants. I also donā€™t have any POP-UPs or COOKIES. I have repeatedly been told over the years how much I have contributed to the community. Itā€™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 26

Please wait approximately 5 minutes or you will get a blank synology error page if you try to connect too soon. Now open your browser and type in your HTTPS address that you have previously added at STEP 9 with https:// at the beginning like this https://syncin.yourname.synology.me In my case it’s https://syncin.mariushosting.synology.me If everything goes right, you will see the Sync-in Sign in page. Type in your own Username (INIT_ADMIN_LOGIN) and Password (INIT_ADMIN_PASSWORD) that you have previously added at STEP 19. Click Sign in. Follow the instructions in the image below.

Sync-in Synology NAS Set up 19

  • STEP 27

At the top right of the page, click on the user icon then switch the theme to Dark by clicking the switch icon. Click the Settings icon. Follow the instructions in the image below.

Sync-in Synology NAS Set up 20

  • STEP 28

By clicking the Account tab you can update and save your account information. Click Confirm to save the settings. Follow the instructions in the image below.

Sync-in Synology NAS Set up 21

  • STEP 29

On the Permissions tab, you should give all the Permissions to your administrator user. Click Confirm to save the settings. Follow the instructions in the image below.

Sync-in Synology NAS Set up 22

  • STEP 30

On the left sidebar, you can click the + icon to upload your files or create new documents. Follow the instructions in the image below.

Sync-in Synology NAS Set up 23

  • STEP 31

Select the document type. Give a name to the Document. Click Confirm. Follow the instructions in the image below.

Sync-in Synology NAS Set up 24

  • STEP 32

Select your Document. Right mouse click then Edit. Follow the instructions in the image below. āš ļøWarning: If you don’t click Edit, you won’t be able to modify/edit any document. Clicking “Edit” is mandatory if you want to modify/edit documents.

Sync-in Synology NAS Set up 25

  • STEP 33

You can use your integrated OnlyOffice to view and modify (Edit) your documents.

Sync-in Synology NAS Set up 26

Enjoy Sync-in!

šŸ†˜TROUBLESHOOTING

If you encounter issues by using this container, make sure to check out the Common Docker issues article. āš ļøCheck out the Sync-in Full Documentation.

Note: Can I run Docker on my Synology NAS?Ā See the supported models.
Note: How to Back Up Docker Containers on your Synology NAS.
Note: Find outĀ how to update the Sync-in container with the latest image.
Note: How to Add USB Support on DSM 7.2.
Note: How to Free Disk Space on Your NAS if You Run Docker.
Note: How to Schedule Start & Stop For Docker Containers.
Note: How to Activate Email Notifications.
Note: How to Add Access Control Profile on Your NAS.
Note: How to Change Docker Containers Restart Policy.
Note: How to Use Docker Containers With VPN.
Note: Convert Docker Run Into Docker Compose.
Note: How to Clean Docker.
Note: How to Clean Docker Automatically.
Note: Best Practices When Using Docker and DDNS.
Note: Some Docker Containers Need WebSocket.
Note: Find out the Best NAS Models For Docker.
Note: Activate Gmail SMTP For Docker Containers.

This post was updated on Friday / August 1st, 2025 at 12:44 AM

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