How you manage the state of your docker container services?
reddit / selfhosted

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vazma · 2023-12-16 12:42

In my home I run few services using docker + portainer which as
usually a docker compose is mounting a local path as state to each
container.
i.e $HOME/$SERVICE/DATA:/DATA

I am re-designing about this configuration and I am thinking to use my
NAS as the storage server which I will create a volume mounting to a
specific DIR in my NAS and keep the config there safe and redundant.


Do you have any examples / best practises around this topic?

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jenishngl · 2023-12-16 13:10

Try coolify. I have been using it for all app hosting with and without
docker. Everything is extremely easy.

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pixelvengeur · 2023-12-16 13:13

I don't have any 'best practices' to recommend, but the way you want
to go about it is how I do it.

One thing you should keep in mind is that if power goes out, and your
containers boot before your NAS finishes booting up, the shares won't
be there and thus deployment will fail. You will have to either reboot
the machine that hosts the containers, restart the docker service, or
hopefully only need a `sudo mount -a` to mount the network volumes to
the machine.

You could try messing with systemd and delaying the start of the
docker service until the network shares are mounted, but I haven't
found great luck with that personally.

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thekrautboy · 2023-12-16 13:15

Storing Docker volumes directly on a NAS might impact performance of
the container. Ymmv, depends on a lot of factors. Try it out. Docker
has storage drivers for SMB and NFS builtin.

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gongarher · 2023-12-16 16:31

I have automated the solution of that issue with a simple bash script:
https://github.com/gongarher/telegram-automount-disks

It notifies via Telegram when a disk has been unmounted :)

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tenekev · 2023-12-16 17:44

My bulk data is on a NAS - Media, documents, etc.

Appdata - stuff that is generated and often accessed by the containers
like DBs, metadata, thumbs, etc, is stored on an SSD that is part of
the Docker machine. The file structure is similar to yours -
`Appdata/$SERVICE/data` I've always kept it as a separate  hardware
device that I can easily swap, duplicate, etc.

The config files - docker-compose.yml, .env and other config files
required by services (Like traefik's static config or prometheus's
prometheus.yml or authelia's configuration.yml) are stored in a
separate config directory. Directory structure is
`Config/$STACK_NAME/` or `Config/$SERVICE_NAME/`. These are both
docker-compose driven but one is concerned with a topic like
`stack_media` while the other is concerned with a service like
`service_immich`. Just a simple way to order things when you have 100s
of stacks.

The config directory is sent to a Gitea repo. Portainer pulls from
that repo and applies changes. This way I maintain version history
too.

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schklom · 2023-12-16 20:59

I would simply add a `@reboot chronic /path/script.bash` crontab
script
```
sleep 60
sudo mount -a
sudo systemctl restart docker.service
sudo docker compose -f /path/docker-compose.yaml -e /path/.env up -d
```
Dirty, but should always work. `chronic` emails you if the cron job
fails and you have set up an email account

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kindrudekid · 2023-12-16 23:01

All the other solution is way too complicated and or home brew….


I just use systemctl method:


    sudo systemctl edit docker


    # add the below contents
    [Unit]
    Requires=mnt-media.mount
    After=mnt-media.mount
    Description=Wait for NFS mounts to be loaded before starting
docker.


To find the mount systemctl name:

    systemctl list-units -t mount --all

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Frozen_Gecko · 2023-12-16 23:08

This is brilliant, thank you

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MDSExpro · 2023-12-17 08:54

By using Kubernetes.