Adding my parents to tailscale
I've been digitizing my family's collection of physical media onto my homelab. My motivation here was originally just to archive the media and store it for safe keeping in case some act of god affects the originals. But as expected, the second that some were digitized my parents wanted to take a watch. I was a cute kid after all.
Enter: Tailscale
I've been using Tailscale for years now as part of my own internal network, mostly to ssh into my homelab when I'm working on my primary or on mobile. It's much simpler interface to Wireguard and basically does the same (synthetic VPC access to devices backed by auto-deployed public keys). You can set up a more limited version for your extended family as well.
Media library
Tailscale is just the connection protocol to access your homelab. Unless you want to give your family raw file system access (which means they'll have to download a full 23GB file before it plays), a media server with a web UI is a much better choice.
My first inclination was to use Plex, since I used it a few years ago to host some of my media collection. With Plex you actually don't need to use Tailscale because they route your Plex instance through their servers to escape your firewall blocking direct connections to your device. I wasn't thrilled at the idea of proxying all my video traffic through their centralized account management system and in turn their own servers.
Jellyfin is a simpler self-hosted alternative. In the interest of maintaining my existing deployment pipeline (ie. all logic encapsolated within a single docker image), I made use of docker-within-docker to host the standard Jellyfin media server:
env_args = _build_env_args(media_config)
docker_cmd = [
"docker", "run", "--rm", "--name", CONTAINER_NAME,
"--network", "host",
*env_args,
*volume_args,
JELLYFIN_IMAGE,
]
If you check out the full code, there are a few things going on that require some wrapper logic around the docker image:
- Dynamic mounting of the NAS via a temporary SMB mounting point; the NAS will hold the raw media files as well as the transcoded paths to allow for faster streaming
- Mounting only the isolated path to these family videos
- Using
rofor the volume to guarantee at OS level that Jellyfin isn't going to touch my underlying media
ACL roles
You have to define the tags in the ACL permissions before you can add them to the device. Since our homeserver is called bungalo, I added that as the given tag type1.
{
// Define the tags which can be applied to devices and by which users.
"tagOwners": {
"tag:bungalo": ["autogroup:admin"],
},
// Traditional ACL format (not grants)
"acls": [
// Allow family to access bungalo-neuron on ports 80 and 8096 only
{
"action": "accept",
"src": ["[email protected]", "[email protected]"],
"dst": ["tag:bungalo:80", "tag:bungalo:8096"],
},
// Allow piercefreeman@github unrestricted access to all machines
{
"action": "accept",
"src": ["piercefreeman@github"],
"dst": ["*:*"],
},
],
// Define users and devices that can use Tailscale SSH.
"ssh": [
{
"action": "check",
"src": ["autogroup:member"],
"dst": ["autogroup:self"],
"users": ["autogroup:nonroot", "root"],
},
],
}
Once these are defined we add the tags to the device:
We want to allow limited access to the root status page for the homeserver :80 and the jellyfin server hosted on :8096. The root status page allows them to just access the device by the host name.
Setup
I had the benefit of having physical access to the computer during this setup. You should be able to do the same thing via a remote control session (Zoom Remote Control) but you'll probably run into some challenges if you try to script this whole process. There are a lot of manual auth jumps from the setup packager to the browser back to the toolbar utility, etc.
You'll have to send out a custom invite link. From there it's as simple as clicking the accept link to start account creation:
Most parts of the setup manager are pretty straightforward. The one part to double check is that when you login in the browser, you'll get an option to join their own tailscale or to join your own. Select your own since otherwise they won't be able to see the media server. Tailscale networks are isolates from one another and there doesn't seem to be an easy way to switch via the toolbar app2. If you're on the right network and have the right ACL permissions setup, you should be ready to stream your media:
http://bungalo-neuron/
This resolution by device name - not tag - is provided by the Magic DNS setting that can be configured in Tailscale's DNS settings.
The technical factors in this whole setup are impressive to me, but my parents couldn't care less. It feels like they're accessing any other website. This includes when they shutdown their computer and turn it back on again.
The whole thing just works™. It feels like an overly technical solution to what is a very basic problem (viewing some videos!) but I actually feel like it's the right balance to securely host your own content in a set-and-forget way.