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Robert Hensing 2021-06-03 08:44:37 +02:00
parent 40394f4822
commit 3171cf1c21
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docs/modules/ROOT/pages/index.adoc
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@ -61,11 +61,18 @@ Add this module to your NixOS configuration:
{ pkgs, ... }: { { pkgs, ... }: {
environment.systemPackages = [ environment.systemPackages = [
pkgs.arion pkgs.arion
pkgs.docker # docker CLI will use podman socket
# Do install the docker CLI to talk to podman.
# Not needed when virtualisation.docker.enable = true;
pkgs.docker-client
]; ];
# Arion works with Docker, but for NixOS-based containers, you need Podman
# since NixOS 21.05.
virtualisation.docker.enable = false; virtualisation.docker.enable = false;
virtualisation.podman.enable = true; virtualisation.podman.enable = true;
virtualisation.podman.dockerSocket.enable = true; virtualisation.podman.dockerSocket.enable = true;
virtualisation.podman.defaultNetwork.dnsname.enable = true;
# Use your username instead of `myuser` # Use your username instead of `myuser`
users.extraUsers.myuser.extraGroups = ["podman"]; users.extraUsers.myuser.extraGroups = ["podman"];
@ -125,8 +132,6 @@ Describe containers using NixOS-style modules. There are a few options:
}; };
}; };
} }
``` ```
==== NixOS: run only one systemd service ==== NixOS: run only one systemd service
@ -134,7 +139,6 @@ Describe containers using NixOS-style modules. There are a few options:
`examples/nixos-unit/arion-compose.nix`: `examples/nixos-unit/arion-compose.nix`:
```nix ```nix
{ {
services.webserver = { config, pkgs, ... }: { services.webserver = { config, pkgs, ... }: {
@ -157,7 +161,6 @@ Describe containers using NixOS-style modules. There are a few options:
]; ];
}; };
} }
``` ```
==== NixOS: run full OS ==== NixOS: run full OS
@ -220,10 +223,10 @@ development environments while working on
https://www.hercules-ci.com[Hercules CI]. (It was also born out of https://www.hercules-ci.com[Hercules CI]. (It was also born out of
ancient Greek deities disguised as horses. More on that later.) ancient Greek deities disguised as horses. More on that later.)
If you do want to use Arion for production environments, you’ll probably Arion can be used for simple single host deployments, using Docker's TLS
want to either build normal container images or manage garbage client verification, or https://search.nixos.org/options?channel=unstable&show=virtualisation.podman.networkSocket.enable&query=virtualisation.podman[`virtualisation.podman.networkSocket` options].
collection roots if you control the deployment host. Neither scenario is Remote deployments do not support `useHostStore`, although an SSH-based deployment method could support this.
made easier by arion at this time. Docker Swarm is not currently supported.
Arion has run successfully on Linux distributions other than NixOS, but we only perform CI for Arion on NixOS. Arion has run successfully on Linux distributions other than NixOS, but we only perform CI for Arion on NixOS.
@ -254,6 +257,8 @@ container.
Nope, it’s just Nix and Docker Compose under the hood. Nope, it’s just Nix and Docker Compose under the hood.
It does xref:hercules-ci-effects:ROOT:reference/nix-functions/runArion.adoc[integrate] nicely though.
=== What about garbage collection? === What about garbage collection?
Arion removes the need for garbage collecting docker images, delegating Arion removes the need for garbage collecting docker images, delegating
@ -266,8 +271,9 @@ generate images that can be used in production.
=== Why is my container not running latest code? === Why is my container not running latest code?
Restart it with `arion restart <name>` or if you've changed the image rebuild Rebuild the image using `arion up -d --always-recreate-deps <name>` or simply `arion up -d`.
them using `arion up -d --always-recreate-deps <name>`.
Like `docker-compose restart`, `arion restart` does not update the image before starting.
=== What is messing with my environment variables? === What is messing with my environment variables?
@ -278,11 +284,11 @@ reference a script from `pkgs.writeScript` or escape the dollar sign as
=== Why name it ``Arion``? === Why name it ``Arion``?
Arion comes from Greek mythology. Poseidon, the god of ~Docker~ the seas Arion comes from Greek mythology. Poseidon, the god of Docker -- I mean the seas --
had his eye on Demeter. Demeter tried to trick him by disguising as a had his eye on Demeter. Demeter tried to trick him by disguising as a
horse, but Poseidon saw through the deception and they had Arion. horse, but Poseidon saw through the deception and they had Arion.
So Arion is a super fast divine horse; the result of some weird mixing. So Arion is a super fast divine horse; the result of some weird mixing.
Also it talks. Also it talks.
(And we feel morally obliged to name our stuff after Greek mythology) (And we felt morally obliged to name our stuff after Greek mythology)