Official NixOS Wiki

Docker: Difference between revisions

← Older edit
BrenekH (talk | contribs)
1 edit
VisualWikitext
Pigs (talk | contribs)
275 edits
fix formatting
m Modify the flake reproducible image dates section to use a snippet which doesn't exclude the the time of the commit. The original snippet intentionally cut the time so the `date` command would accept the input of `self.lastModifiedDate`. By using `self.lastModified` (seconds since epoch of commit) and prepending "@", the date command can interpret the full datetime and embed it into the resulting image.
 
(7 intermediate revisions by 6 users not shown)
Line 276: Line 276:
$ systemctl --user start docker
$ systemctl --user start docker
</syntaxhighlight>
</syntaxhighlight>
{{note|User services do not persist after logging out by default. This will cause any Docker containers to stop if a user logs out. Set option {{nixos:option|users.users.*.linger|users.users.<name>.linger}} to true for Docker containers to persist. See [[Systemd/User Services#Keeping user services running after logout]] for more details.}}


<translate>
<translate>
Line 291: Line 293:
</syntaxhighlight>
</syntaxhighlight>


=== Using Privileged Ports for Rootless Docker ===
Rootless containers are not able to bind ports from 0 to 1023 as such port can only be used by privileged users.  This problem can be solved by using port forwarding.
Assume you'd like a rootless container to make use of ports 53 (DNS; TPC and UDP) and 80 (web; TCP).  We may force the container to use port 8000 while the firewall is instructed for forward traffic from port 80 to 8000.  Same logic applies for port 53.  Refer to the following example:<syntaxhighlight lang="nixos"># Firewall
networking.firewall = {
  enable = true;
  allowedTCPPorts = [ 80 8000 53 5300 ];
  allowedUDPPorts = [ 53 5300 ];
};
boot.kernel.sysctl = {
  "net.ipv4.conf.eth0.forwarding" = 1;    # enable port forwarding
};
   
networking = {
  firewall.extraCommands = ''
    iptables -A PREROUTING -t nat -i eth0 -p TCP --dport 80 -j REDIRECT --to-port 8000
    iptables -A PREROUTING -t nat -i eth0 -p TCP --dport 53 -j REDIRECT --to-port 5300
    iptables -A PREROUTING -t nat -i eth0 -p UDP --dport 53 -j REDIRECT --to-port 5300
  '';
};</syntaxhighlight>Whilst the docker-compose.yaml might look like this:<syntaxhighlight lang="dockerfile">
services:
  myserver:
    image: ...
    restart: always
    ports:
      - "5300:53/tcp"
      - "5300:53/udp"
      - "8000:80"
</syntaxhighlight>


<translate>
<translate>
Line 357: Line 389:
<translate>
<translate>
<!--T:48-->
<!--T:48-->
An alternative, if using [[flakes]], is to do <code>created = builtins.substring 0 8 self.lastModifiedDate</code>, which uses the commit date, and is therefore reproducible.
An alternative, if using [[flakes]], is to do <code>created = "@" + builtins.toString self.lastModified</code>, which uses the commit date, and is therefore reproducible.
</translate>
</translate>


<translate>
<translate>
==== Calculating the sha256 for a pulled Docker image ==== <!--T:49-->
==== Calculating the sha256 for a pulled Docker image ==== <!--T:49-->
</translate>
</translate>
Line 577: Line 610:
<translate>
<translate>
<!--T:77-->
<!--T:77-->
to provide access to <code>/var/run/mysqld/mysqld.sock</code>
to provide access to <code>/var/run/mysqld/mysqld.sock</code>. Sadly, this means you'll have to restart the container when /var/run/mysqld is replaced, e.g. on an upgrade.
 
</translate>
</translate>


Line 686: Line 720:
Restarting the container or Docker might be required.
Restarting the container or Docker might be required.
</translate>
</translate>
=== NVIDIA Docker Containers ===
If attempting to pass your nvidia gpu through to docker container(s), you will need to install <code>nvidia-container-toolkit</code> and enable cdi.
{{File|3={
  virtualisation.docker.enable = true;
  hardware.nvidia-container-toolkit.enable = true;
  # Regular Docker
  virtualisation.docker.daemon.settings.features.cdi = true;
  # If using Rootless Docker
  # virtualisation.docker.rootless.daemon.settings.features.cdi = true;
}|name=configuration.nix|lang=nix}}
You may also need to adjust your docker compose file to use cdi instead of the nvidia driver.
{{File|3=services:
  ollama:
    image: ollama/ollama
    volumes:
      - ollama:/root/.ollama
    ports:
      - 11434:11434
    deploy:
      resources:
        reservations:
          devices:
            # Go from this:
            # - driver: nvidia
            #  count: all
            #  capabilities: [gpu]
            # To this:
            - driver: cdi
              capabilities: [gpu]
              device_ids:
                - nvidia.com/gpu=all
volumes:
  ollama: {}|name=compose.yml|lang=yaml}}


<translate>
<translate>
Line 693: Line 765:


<references/>
<references/>
== See also ==
*[https://nixcademy.com/posts/auto-update-containers/ Run and Auto-Update Docker Containers on NixOS, Nixcademy]


[[Category:Applications]]
[[Category:Applications]]
Retrieved from "https://wiki.nixos.org/wiki/Docker"