Important or Recent Updates
|New DSM7.2 Container Manager Update||01/05/2023|
|Added additional security option to the compose to restrict the container from gaining new privileges as well as umask variable||25/10/2023|
In this guide I am going to take you through the setup of Plex in Docker using Container Manager.
You will only benefit from hardware transcoding if you have an active Plex Pass either monthly or lifetime. If you don’t have one you can either follow this guide or jump over to the non hardware transcoding version.
Does my Synology support Hardware Transcoding?
Before we do anything else, you need to make sure your model of Synology has hardware transcoding capabilities. You need to do a quick lookup via the linked Google Sheet below, this is updated by Plex and makes it super easy to look up your model of NAS.
If you find that hardware transcoding is not available on your model you can jump back over to the standard guide on the menu.
As usual, it’s important you complete the two proceeding guides which will get your folder structure and docker, user setup.
Let’s start by getting some folders set up for the container to use. Open up File Station create the following.
Next we are going to set up a ‘Project’ in Container Manager. Open up Container Manager and click on Project then on the right-hand side click ‘Create’.
In the next screen we will set up our General Settings, enter the following:
Next we are going to drop in our docker compose configuration copy all the code in the box below and paste it into line ‘1’ just like the screenshot.
services: plex: image: linuxserver/plex:latest container_name: plex network_mode: host environment: - PUID=1234 #CHANGE_TO_YOUR_UID - PGID=65432 #CHANGE_TO_YOUR_GID - TZ=Europe/London #CHANGE_TO_YOUR_TZ - UMASK=022 - VERSION=latest - PLEX_CLAIM= #Your Plex Claim Code volumes: - /volume1/docker/plex:/config - /volume1/data/media:/data/media devices: - /dev/dri:/dev/dri security_opt: - no-new-privileges:true restart: always
A note on Network Mode
You will notice that for Plex we don’t put it on the normal bridge network, this is because DSM reserves the DLNA ports Plex requires in order to use DLNA. So we run in Host mode, so it can share the ports.
We need to make some changes in order for the container to have the correct permissions to save its configuration files and to have access to your media.
|PUID||(required) The UID you obtained in the user setup guide|
|PGID||(required) The GID you obtained in the user setup guide|
|TZ||(required) Your timezone wikipedia.org/wiki/List_of_tz_database_time_zones|
|PLEX_CLAIM||Please note the PLEX_CLAIM variable is optional and not always required. You can remove this line if you don’t need it or come back and add it if you are unable to sign in to your server on start up.|
To get the code go to https://plex.tv/claim and sign in, then put the code you receive after the ‘PLEX_CLAIM=’. You have 4 mins to finish the guide after doing this, so best to grab it just before running the project.
I have pre-filled this section to pass the correct paths, the only thing that you may need to change is the /volume1/ if your file paths are on a different volume.
You do not need to enable anything on the ‘Web portal settings’ screen click ‘Next’ again.
On the final screen click ‘Done’ which will begin the download of the container images and once downloaded they will be launched!
The image will now be downloaded and extracted. You should see ‘Code 0’ when it has finished.
You will now see your Plex running and should have a green status on the left-hand side.
(Skip if you don’t have the Firewall configured)
If you have enabled and configured the Synology Firewall you will need to create exceptions for any containers that have a Web UI or have any incoming or outgoing connections. This section covers the basics of how to add these. (Please note this is a generic section and will not show the specific ports in this guide however it applies in the same way)
Head into the
Firewall, from here click
Edit Rules for the profile you set up when you enabled the Firewall.
Next click on
Create and you will see the screen below. Source IP and Action will be automatically selected to All and Allow, I will leave it up to you as to your own preference on whether you want to lock down specific Source IPs from having access. In this example we will leave as All.
You will now choose ‘Select from a list of built-in applications‘ and then the
Now from the list choose the newly created Docker container (You can do more than one if you wish)
Click OK a couple of times to get back to the main screen. You will see by default the new rule is added to the bottom of the list. You must always have your Block All rule last in the list as the rules are applied top down so move your container up.
You have now completed the Firewall changes and can continue with the guide.
Plex Initial Setup
After a few minutes you should be able to access the server and go through the Plex setup by going to the IP of your NAS in your browser followed by port 32400/web/
You will be asked to sign in or sign up for an account if you don’t have one already.
You should now be able to add your media which will be in the /data/media folder within Plex
Once you have got to the main Plex interface make sure you go into the settings and turn on
- Enable HDR tone mapping
- Use hardware acceleration when available
- Use hardware-accelerated video encoding
That’s it you are all setup. When a new server update is available you will just need to restart the container, and it will automatically download the latest update.
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