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@Jip-Hop
Last active May 8, 2023 20:23
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What would you like to do?
Persistent Debian 'jail' on TrueNAS SCALE to install software (docker-compose, portainer, podman, etc.) with full access to all files via bind mounts. Without modifying the host OS at all thanks to systemd-nspawn!
@Talung
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Talung commented Feb 28, 2023

ah ok. Must have missed that part of the setup. Or maybe I skipped it just to get it working for testing. Is there a way to update it now, or should I just make a new one. Thing is, I would probably run into situations where I would want to add more mounts in at a later stage.

I have everything else setup with no issues. So script and documentation was fine in that respect. thanks

EDIT. went through install again and saw what was happening. It is way easier than I thought, just need to modify the config file and add: systemd_nspawn_user_args=--bind='/mnt/pond/appdata/' for the various folders or --bind-ro=

Added this part for anybody else that runs into the same issue. :)

@Jip-Hop
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Jip-Hop commented Feb 28, 2023

Exactly! Glad you got it solved :)

@Talung
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Talung commented Mar 1, 2023

Quick update for you. Everything is working great. Been able to move all the native docker stuff into the jail without really needing to change much. Even the "internal networking" I setup went through just fine ie. in portainer "networks". Haven't need to use Traefek or anything like that, works as it did before. I haven't tried any nvidia passthrough yet and have noticed that you have a recent update on that, so will look at that at a later stage.

I did notice that there is no daemon.json file in the container and am assuming I just need to add in my copy from "enable-docker.sh" in there. I haven't done that yet.

Also, I have noticed all the images are stored with the jail, which means if I recreate the jail I would need to re-download all the images again. All my data is outside of it, so not really an issue tbh, except during development stages.

Just wanted to add my thanks to you for doing this. 👍

@Jip-Hop
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Jip-Hop commented Mar 1, 2023

Good to hear! And convenient that you have a nvidia GPU :) Indeed still in the process of getting that working properly.

I don't know what you have in the daemon.json. I don't think you need to do anything with it when running docker inside the jail. I know I haven't touched that file myself since switching.

I think you can also bind mount the directory where docker stores the images to a directory on the host. That way when you recreate a jail all the images are still downloaded. But since you also need to reinstall docker in this fresh jail perhaps that won't work the way I think/hope it does.

@Talung
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Talung commented Mar 1, 2023

Essentialy my last daemon.json was

{
  "data-root": "/mnt/pond/dockerset",
  "storage-driver": "overlay2",
  "exec-opts": [
    "native.cgroupdriver=cgroupfs"
  ],
  "runtimes": {
    "nvidia": {
      "path": "/usr/bin/nvidia-container-runtime",
      "runtimeArgs": []
      }
    }
}

But, as you mention with the bind mounts, if I add that dockerset, then it would make the jail extremely thin. Meaning the only thing I would need to do when creating it is a small script to install docker and setup the various files. That should be easy enough. Will be trying that soon with the nvidia changes and seeing if I can get that working. Got an old GTX 1070 in there.

Btw, I take it the quick/correct way to remove a jail is just to remove the folder after it is stopped?

EDIT: Interestingly enough this is what TrueNAS has changed the daemon.json file to:

{
	"data-root": "/mnt/pond/ix-applications/docker", 
        "exec-opts": ["native.cgroupdriver=cgroupfs"], 
	"iptables": false, 
	"bridge": "none", 
	"storage-driver": "overlay2"
}

No mention of nvidia in there.

@Jip-Hop
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Jip-Hop commented Mar 1, 2023

Yes, you can just stop the jail and then remove the corresponding directory from the jails directory. I'd add a sleep of 1 second in between those 2 commands. Noticed the rm would fail because some files were not unmounted yet immediately after stopping the jail with machinectl stop.

@ZestyChicken
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2 questions for you guys - can you pull your TrueNAS Scale users into the jail and work with consistent users between the jail and Scale host?

For example, I have an apps user/group in Scale which has ownership of my media files (set up for TrueCharts). It looks like there is a flag -u that may do that but the language is confusing.

Also, if I wanted to expose port 80 & 443 for traefik, I know I can create an alias for my primary ip address but would this IP need to be attached to the jail via host or bridge networking? I set up a bridge but was unable to deploy traefik presumedly because it was complicting with the TrueNAS GUI.

@qudiqudi
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2 questions for you guys - can you pull your TrueNAS Scale users into the jail and work with consistent users between the jail and Scale host?

You have to translate your TN users into unique Users/Groups inside the jail. You can map them to the same UID/GID but I would advise against it to prevent permission issues.

Also, if I wanted to expose port 80 & 443 for traefik, I know I can create an alias for my primary ip address but would this IP need to be attached to the jail via host or bridge networking?

There is a networking section of the readme.md, read it carefully, as it gives concise yet direct instructions on how to do that. If you want to reverse proxy via traefik, your jail needs an IP address from your DHCP server. This is possible via a network bridge on the TN host.

@LimonChoms
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can amdgpu(like 5700xt,5600g...) run on jail?

@Jip-Hop
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Jip-Hop commented Apr 28, 2023

I don't think so. As far as I know TrueNAS SCALE doesn't include drivers for AMD GPUs. But I could be wrong!

@LimonChoms
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I don't think so. As far as I know TrueNAS SCALE doesn't include drivers for AMD GPUs. But I could be wrong!

No,it has amdgpu drivers,it works on my jellyfin docker for hw-encoder very well.It's just that I don't know how to make it work in jail.

@Jip-Hop
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Jip-Hop commented Apr 28, 2023

In that case I think it should be possible to use the GPU in the jail as well! But I don't know how and I don't have the time and hardware (AMD GPU) to figure this out. Perhaps you could draw inspiration form the nvidia GPU passhtrough issue?

@nguypaul
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nguypaul commented May 7, 2023

I just wanted to say thanks for this script. I finally migrated my 15 apps from Truecharts over to a jail. I'm using portainer and docker compose to manage everything and it is working nicely. Nvidia GPU passthrough took some effort but I finally got that working with Jellyfin and Nextcloud. Traefik is also working well as my reverse proxy.

I disabled k3s and now my CPU usage doesn't hover around 15% anymore. Very Happy so far.

@Jip-Hop
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Jip-Hop commented May 7, 2023

Glad to hear that @nguypaul 😄👍

@worksmarter
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Really excited about this but I ran into a snag on my system. When prompted by the script I added the --network-bridge=br1 --resolv-conf=bind-host and the jail fails to boot - comes up with an error... My need is to setup portainer in the jail. Docker-compose installed without a problem, but I can't figure out how to make the network bridge work so when I install Portainer I can reach it.

Right now I am at the stage where the jail is installed and running; so is docker-compose, but I don't know exactly how I add the "--network-bridge=br1 --resolv-conf=bind-host" to the config file to bring up the bridge. Sorry, I am sure this is trivial, but I am not having any luck adding it in the "jlmkr.py" file. Is it possible you can assist me? I looked at the config file on my first attempt and failed trying to add that tidbit of code to it. It never brought up a bridge for portainer.

@nguypaul
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nguypaul commented May 8, 2023

When prompted by the script I added the --network-bridge=br1 --resolv-conf=bind-host and the jail fails to boot - comes up with an error...

I'm not sure if my scenario is the same as yours, but when creating the jail the only customization I add is the --bind='/mnt/pathtodata' to mount my shares.

The jail automatically has full access to the host network so I can reach portainer just by using the ip address of my host and the port configured for portainer. I can share my portainer compose file if you think that will be helpful.

@worksmarter
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Okay, hey thanks. Yes, I too set the flags to bind my mount points. (and the flags for a network bridge). I just can't get networking going properly and now I basically have no network connectivity. Following the instructions and setting up a bridge as per instructions is not working for me. Right now I am trying to get the networking running again, for I can't even ping google! Frustrating - I know this can't be so hard...

@Jip-Hop
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Jip-Hop commented May 8, 2023

I assume you have been patient for the jail to be assigned an IP addresses via DHCP? For me (and others reported too) that it can take a while, up to 30 seconds I guess. If you leave the jail with bridge up for a bit and network still doesn't work then it's a different problem. But as @nguypaul mentions, a bridge is not required to use portainer in the jail. So unless you have a specific reason to go 'the hard way' I'd just use it with the default networking.

@worksmarter
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Thank you Sir and thank you for the wonderful script. I finally got everything talking to one another (Internet, apps). I am obviously doing something wrong with portainer. I never had an issue using the docker-compose truechart and pointing it at a docker-compose.yml file. I can't see how I would use that approach here. I am at a complete loss, which saddens me as I am sure this system seems to work swimmingly for everyone else. And sadly how to install and access portainer is not within the scope of this gist.

@worksmarter
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worksmarter commented May 8, 2023

Should there be an address in this? (Output from ./jlmkr.py list)
MACHINE CLASS SERVICE OS VERSION ADDRESSES
docker-compose container systemd-nspawn debian 11 -

@nguypaul
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nguypaul commented May 8, 2023

@worksmarter share your portainer compose file.

@worksmarter
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There is where it appears to be:
Run this with docker compose up -d and it comes right up as everyone said it would. I feel so stupid but it had to be the ports.

`version: '3'

services:
portainer:
image: portainer/portainer-ce:latest
container_name: portainer
restart: unless-stopped
security_opt:
- no-new-privileges:true
volumes:
- /etc/localtime:/etc/localtime:ro
- /var/run/docker.sock:/var/run/docker.sock:ro
- ./portainer-data:/data
ports:
- 9000:9000`

Wish I had come to that conclusion before posting. AND hasltleing around with bridging the networks, what a hassle that was. Thanks for your patience everyone. Great script JipHop!

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